514
FNUS55 KRIW 171202
FWFRIW
FIRE WEATHER PLANNING FORECAST FOR WESTERN AND CENTRAL WYOMING
NATIONAL WEATHER SERVICE RIVERTON WY
501 AM MST WED DEC 17 2025
DISCUSSION
***THIS PRODUCT IS CURRENTLY AUTOMATED WITH NO DISCUSSION
AND WILL NOT BE REFRESHED WITH ALL FORECAST UPDATES. IT SHOULD
BE USED FOR PLANNING PURPOSES ONLY. IF YOU NEED ADDITIONAL FIRE
WEATHER INFORMATION, PLEASE CONTACT THE NWS OFFICE IN RIVERTON,
WYOMING. THE HUMAN WRITTEN DISCUSSION SECTION ALONG WITH THE FIRE
WEATHER FORECAST WILL RESUME REGULAR OPERATIONS SOMETIME IN
SPRING 2026.***
---THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS---
WYZ280-172300-
NATRONA COUNTY/CASPER BLM-
INCLUDING THE CITIES OF CASPER AND MIDWEST
501 AM MST WED DEC 17 2025
..HIGH WIND WARNING IN EFFECT UNTIL 11 PM MST THIS EVENING
TODAY
SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS
EARLY IN THE AFTERNOON. CHANCE OF RAIN SHOWERS
EARLY IN THE AFTERNOON, THEN SLIGHT CHANCE OF
RAIN SHOWERS AND SNOW SHOWERS LATE IN THE
AFTERNOON. CHANCE OF PRECIPITATION 50 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....48-53.
24 HR TREND......5 DEGREES COOLER.
MIN HUMIDITY........32-38 PERCENT.
24 HR TREND......6 PERCENT WETTER.
20-FOOT WINDS.......VERY WINDY. SOUTHWEST WINDS 35 TO 40 MPH WITH
GUSTS TO AROUND 65 MPH UNTIL 1200, THEN AROUND
45 MPH WITH GUSTS TO AROUND 70 MPH UNTIL 1500,
THEN WEST AROUND 35 MPH WITH GUSTS TO AROUND 60
MPH.
RIDGE TOP WINDS.....SOUTHWEST 35 TO 40 MPH UNTIL 0900, THEN 45 TO
50 MPH UNTIL 1600, THEN WEST AROUND 40 MPH.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 35 TO 40 MPH UNTIL 0900, THEN 45 TO
50 MPH UNTIL 1200, THEN WEST 55 TO 60 MPH UNTIL
1600, THEN AROUND 50 MPH UNTIL 1700, THEN
AROUND 40 MPH.
MIXING HEIGHT.......600-2600 FT AGL UNTIL 1100, THEN 2800-4800 FT
AGL UNTIL 1400, THEN 3400-5200 FT AGL UNTIL
1700, THEN 2000-2400 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 1000, THEN VERY GOOD UNTIL
1200, THEN EXCELLENT UNTIL 1600, THEN VERY GOOD
TO EXCELLENT UNTIL 1700, THEN GOOD.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....20-25.
24 HR TREND......18 DEGREES COOLER.
MAX HUMIDITY........45-51 PERCENT.
24 HR TREND......9 PERCENT DRIER.
HUMIDITY RECOVERY...MODERATE.
20-FOOT WINDS.......WINDY. WEST WINDS 30 TO 35 MPH WITH GUSTS TO
AROUND 55 MPH UNTIL 0300, THEN AROUND 25 MPH
WITH GUSTS TO AROUND 45 MPH.
RIDGE TOP WINDS.....WEST 35 TO 40 MPH UNTIL 0500, THEN AROUND 30
MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST 35 TO 40 MPH UNTIL 0500, THEN AROUND
30 MPH.
MIXING HEIGHT.......1000-3000 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....37-42.
24 HR TREND......12 DEGREES COOLER.
MIN HUMIDITY........27-33 PERCENT.
24 HR TREND......5 PERCENT DRIER.
20-FOOT WINDS.......WEST WINDS 15 TO 20 MPH. GUSTS UP TO 25 MPH
UNTIL 1200, THEN 35 MPH.
RIDGE TOP WINDS.....WEST 20 TO 25 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 20 TO 25 MPH UNTIL 1400, THEN SOUTHWEST.
MIXING HEIGHT.......1600-3600 FT AGL UNTIL 1700, THEN 1000-1200 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
WINDY. PARTLY CLOUDY. LOWS IN THE LOWER 30S.
SOUTHWEST WINDS AROUND 30 MPH.
FRIDAY
WARMER, WINDY. PARTLY CLOUDY. CHANCE OF SNOW SHOWERS
AND SHOWERS. LOWS IN THE UPPER 20S. HIGHS IN THE MID 50S. WEST
WINDS AROUND 30 MPH.
SATURDAY
COLDER. PARTLY CLOUDY WITH CHANCE OF SNOW SHOWERS.
LOWS IN THE MID 20S. HIGHS IN THE LOWER 40S. WEST WINDS AROUND
15 MPH.
SUNDAY
PARTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN THE UPPER
40S. SOUTHWEST WINDS AROUND 15 MPH.
MONDAY THROUGH TUESDAY
PARTLY CLOUDY. LOWS IN THE MID 30S.
HIGHS IN THE MID 50S.
WYZ283-172300-
UPPER WIND RIVER BASIN/WIND RIVER BASIN-
INCLUDING THE CITIES OF CROWHEART, LANDER, RIVERTON, AND SHOSHONI
501 AM MST WED DEC 17 2025
..HIGH WIND WARNING IN EFFECT UNTIL 5 PM MST THIS AFTERNOON
TODAY
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY THEN
BECOMING MOSTLY SUNNY. CHANCE OF RAIN SHOWERS
THROUGH THE DAY. CHANCE OF SNOW SHOWERS IN THE
AFTERNOON. CHANCE OF PRECIPITATION 50 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....47-52.
24 HR TREND......7 DEGREES COOLER.
MIN HUMIDITY........33-39 PERCENT.
24 HR TREND......7 PERCENT WETTER.
20-FOOT WINDS.......VERY WINDY. SOUTHWEST WINDS 25 TO 30 MPH WITH
GUSTS TO AROUND 50 MPH UNTIL 1200, THEN WEST 35
TO 40 MPH WITH GUSTS TO AROUND 65 MPH.
RIDGE TOP WINDS.....SOUTHWEST 30 TO 35 MPH UNTIL 1100, THEN WEST 40
TO 45 MPH UNTIL 1700, THEN AROUND 35 MPH.
CHC OF WETTING RAIN.5 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 30 TO 35 MPH UNTIL 1000, THEN 40 TO
45 MPH UNTIL 1200, THEN WEST 50 TO 55 MPH UNTIL
1700, THEN AROUND 35 MPH.
MIXING HEIGHT.......800-2800 FT AGL UNTIL 1200, THEN 3400-5400 FT
AGL UNTIL 1700, THEN 2200-2600 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 1100, THEN GOOD UNTIL 1200,
THEN EXCELLENT UNTIL 1700, THEN GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....20-25.
24 HR TREND......15 DEGREES COOLER.
MAX HUMIDITY........47-53 PERCENT.
24 HR TREND......11 PERCENT DRIER.
HUMIDITY RECOVERY...MODERATE.
20-FOOT WINDS.......WINDY. WEST WINDS AROUND 30 MPH WITH GUSTS TO
AROUND 50 MPH UNTIL 0300, THEN AROUND 20 MPH
WITH GUSTS TO AROUND 35 MPH.
RIDGE TOP WINDS.....WEST 30 TO 35 MPH UNTIL 0400, THEN 20 TO 25
MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST 30 TO 35 MPH UNTIL 0400, THEN 20 TO
25 MPH.
MIXING HEIGHT.......800-2600 FT AGL.
SMOKE DISPERSAL.....POOR.
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS
LATE IN THE MORNING. CHANCE OF SNOW SHOWERS
LATE IN THE AFTERNOON. CHANCE OF SNOW 50
PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....36-41.
24 HR TREND......12 DEGREES COOLER.
MIN HUMIDITY........32-38 PERCENT.
24 HR TREND......1 PERCENT DRIER.
20-FOOT WINDS.......SOUTHWEST WINDS 10 TO 15 MPH. GUSTS UP TO 20
MPH UNTIL 1500, THEN 25 MPH.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 15 TO 20 MPH UNTIL 1100, THEN SOUTHWEST.
MIXING HEIGHT.......600-2600 FT AGL.
SMOKE DISPERSAL.....POOR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
PARTLY CLOUDY. CHANCE OF SNOW SHOWERS IN THE
EVENING, THEN CHANCE OF SHOWERS AFTER MIDNIGHT. LOWS IN THE UPPER
20S. SOUTHWEST WINDS AROUND 20 MPH.
FRIDAY
WARMER, BREEZY. PARTLY CLOUDY WITH CHANCE OF SHOWERS
AND SNOW SHOWERS. LOWS AROUND 30. HIGHS IN THE LOWER 50S. WEST
WINDS AROUND 25 MPH.
SATURDAY
PARTLY CLOUDY WITH CHANCE OF SNOW SHOWERS AND SLIGHT
CHANCE OF SHOWERS. LOWS IN THE MID 20S. HIGHS IN THE MID 40S.
WEST WINDS AROUND 15 MPH.
SUNDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE
OF SNOW SHOWERS. LOWS IN THE LOWER 30S. HIGHS IN THE MID 40S.
SOUTHWEST WINDS AROUND 10 MPH.
MONDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS IN THE MID 30S. HIGHS IN THE LOWER 50S.
TUESDAY
PARTLY CLOUDY. HIGHS IN THE LOWER 50S.
WYZ285-172300-
SOUTH BIGHORN MOUNTAINS-
501 AM MST WED DEC 17 2025
..HIGH WIND WARNING IN EFFECT UNTIL 5 AM MST THURSDAY
TODAY
SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS IN
THE MORNING. CHANCE OF SNOW SHOWERS THROUGH THE
DAY. CHANCE OF RAIN SHOWERS IN THE AFTERNOON.
CHANCE OF PRECIPITATION 50 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....42-47.
24 HR TREND......5 DEGREES COOLER.
MIN HUMIDITY........37-43 PERCENT.
24 HR TREND......7 PERCENT WETTER.
20-FOOT WINDS.......VERY WINDY. SOUTHWEST WINDS AROUND 25 MPH WITH
GUSTS TO AROUND 45 MPH UNTIL 0900, THEN WEST 35
TO 40 MPH WITH GUSTS TO AROUND 60 MPH.
RIDGE TOP WINDS.....SOUTHWEST 30 TO 35 MPH UNTIL 1000, THEN WEST 40
TO 45 MPH UNTIL 1700, THEN AROUND 40 MPH.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 30 TO 35 MPH UNTIL 1000, THEN 40 TO
45 MPH UNTIL 1200, THEN WEST 50 TO 55 MPH UNTIL
1700, THEN AROUND 40 MPH.
MIXING HEIGHT.......200-2200 FT AGL UNTIL 1200, THEN 2400-4400 FT
AGL.
SMOKE DISPERSAL.....FAIR TO GOOD UNTIL 1200, THEN VERY GOOD TO
EXCELLENT UNTIL 1700, THEN GOOD.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....17-22.
24 HR TREND......18 DEGREES COOLER.
MAX HUMIDITY........51-57 PERCENT.
24 HR TREND......3 PERCENT DRIER.
HUMIDITY RECOVERY...MODERATE.
20-FOOT WINDS.......VERY WINDY. NORTHWEST WINDS 35 TO 40 MPH WITH
GUSTS TO AROUND 60 MPH.
RIDGE TOP WINDS.....NORTHWEST 40 TO 45 MPH UNTIL 0500, THEN AROUND
35 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST AROUND 45 MPH UNTIL 0500, THEN AROUND
35 MPH.
MIXING HEIGHT.......800-2800 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....31-36.
24 HR TREND......11 DEGREES COOLER.
MIN HUMIDITY........33-39 PERCENT.
24 HR TREND......3 PERCENT DRIER.
20-FOOT WINDS.......WEST WINDS 15 TO 20 MPH WITH GUSTS TO AROUND 30
MPH UNTIL 1500, THEN SOUTHWEST WITH GUSTS TO
AROUND 30 MPH.
RIDGE TOP WINDS.....NORTHWEST 20 TO 25 MPH UNTIL 1000. SOUTHWEST
AFTER 1700.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST 30 TO 35 MPH UNTIL 0800, THEN 20 TO
25 MPH UNTIL 1300, THEN SOUTHWEST.
MIXING HEIGHT.......400-2200 FT AGL.
SMOKE DISPERSAL.....POOR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
BREEZY. PARTLY CLOUDY. LOWS IN THE UPPER 20S.
SOUTHWEST WINDS AROUND 25 MPH.
FRIDAY
NOT AS COOL. BREEZY. PARTLY CLOUDY. CHANCE OF SNOW
SHOWERS AND SHOWERS. LOWS IN THE MID 20S. HIGHS IN THE MID 40S.
WEST WINDS AROUND 25 MPH.
SATURDAY
COLDER. PARTLY CLOUDY WITH CHANCE OF SNOW SHOWERS.
LOWS IN THE MID 20S. HIGHS IN THE MID 30S. WEST WINDS AROUND
15 MPH.
SUNDAY
PARTLY CLOUDY. LOWS IN THE LOWER 30S. HIGHS AROUND 40.
SOUTHWEST WINDS AROUND 15 MPH.
MONDAY THROUGH TUESDAY
PARTLY CLOUDY. LOWS IN THE MID 30S.
HIGHS 45 TO 50.
WYZ281-172300-
JOHNSON COUNTY/CASPER BLM-
INCLUDING THE CITIES OF BUFFALO AND KAYCEE
501 AM MST WED DEC 17 2025
..HIGH WIND WARNING IN EFFECT UNTIL 5 PM MST THIS AFTERNOON
TODAY
SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN SHOWERS IN THE
MORNING. SLIGHT CHANCE OF RAIN SHOWERS AND SNOW
SHOWERS IN THE AFTERNOON. CHANCE OF
PRECIPITATION 50 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....48-53.
24 HR TREND......3 DEGREES COOLER.
MIN HUMIDITY........32-38 PERCENT.
24 HR TREND......9 PERCENT WETTER.
20-FOOT WINDS.......WINDY. SOUTH WINDS AROUND 25 MPH WITH GUSTS TO
AROUND 45 MPH UNTIL 0900, THEN SOUTHWEST AROUND
35 MPH WITH GUSTS TO AROUND 60 MPH UNTIL 1500,
THEN NORTHWEST AROUND 25 MPH WITH GUSTS TO
AROUND 40 MPH.
RIDGE TOP WINDS.....SOUTH 30 TO 35 MPH UNTIL 1000, THEN SOUTHWEST
40 TO 45 MPH UNTIL 1400, THEN WEST 35 TO 40 MPH
UNTIL 1600, THEN NORTHWEST 25 TO 30 MPH.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 30 TO 35 MPH UNTIL 1000, THEN WEST 45
TO 50 MPH UNTIL 1600, THEN NORTHWEST 30 TO 35
MPH.
MIXING HEIGHT.......600-2600 FT AGL UNTIL 1200, THEN 3000-5000 FT
AGL UNTIL 1700, THEN 2000-2600 FT AGL.
SMOKE DISPERSAL.....FAIR TO GOOD UNTIL 1200, THEN VERY GOOD UNTIL
1300, THEN EXCELLENT UNTIL 1600, THEN GOOD.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....19-24.
24 HR TREND......15 DEGREES COOLER.
MAX HUMIDITY........50-56 PERCENT.
24 HR TREND......13 PERCENT DRIER.
HUMIDITY RECOVERY...MODERATE.
20-FOOT WINDS.......WINDY. WEST WINDS 25 TO 30 MPH WITH GUSTS TO
AROUND 50 MPH UNTIL 0300, THEN NORTHWEST AROUND
35 MPH WITH GUSTS TO AROUND 55 MPH.
RIDGE TOP WINDS.....WEST 30 TO 35 MPH UNTIL 0200, THEN NORTHWEST
AROUND 40 MPH UNTIL 0500, THEN AROUND 30 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST 35 TO 40 MPH UNTIL 0300. AROUND 35
MPH AFTER 0500.
MIXING HEIGHT.......1400-3400 FT AGL UNTIL 0300, THEN 1000-1400 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....36-41.
24 HR TREND......15 DEGREES COOLER.
MIN HUMIDITY........29-35 PERCENT.
24 HR TREND......5 PERCENT DRIER.
20-FOOT WINDS.......NORTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO
AROUND 25 MPH UNTIL 1200, THEN SOUTHWEST WITH
HIGHER GUSTS.
RIDGE TOP WINDS.....NORTHWEST 15 TO 20 MPH UNTIL 1300, THEN SOUTH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST 30 TO 35 MPH UNTIL 0800, THEN 20 TO
25 MPH UNTIL 1100, THEN WEST AROUND 15 MPH
UNTIL 1300, THEN SOUTHWEST.
MIXING HEIGHT.......1200-3000 FT AGL UNTIL 1700, THEN 600-800 FT
AGL.
SMOKE DISPERSAL.....POOR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS AROUND 30. SOUTHWEST WINDS
AROUND 15 MPH.
FRIDAY
WARMER. MOSTLY CLOUDY. CHANCE OF SNOW SHOWERS AND
SLIGHT CHANCE OF SHOWERS. LOWS IN THE MID 20S. HIGHS IN THE MID
50S. WEST WINDS AROUND 20 MPH.
SATURDAY
COLDER. PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW
SHOWERS. LOWS AROUND 20. HIGHS IN THE UPPER 30S. SOUTHWEST WINDS
AROUND 10 MPH.
SUNDAY
PARTLY CLOUDY. LOWS IN THE LOWER 30S. HIGHS IN THE MID
40S. SOUTHWEST WINDS AROUND 10 MPH.
MONDAY THROUGH TUESDAY
PARTLY CLOUDY. LOWS IN THE LOWER 30S.
HIGHS 51 TO 56.
WYZ282-172300-
SOUTH BIGHORN BASIN/WORLAND BLM-
INCLUDING THE CITIES OF TEN SLEEP, THERMOPOLIS, AND WORLAND
501 AM MST WED DEC 17 2025
..HIGH WIND WARNING IN EFFECT UNTIL 5 PM MST THIS AFTERNOON
TODAY
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
SLIGHT CHANCE OF RAIN SHOWERS IN THE LATE
MORNING AND EARLY AFTERNOON. SLIGHT CHANCE OF
SNOW SHOWERS EARLY IN THE AFTERNOON. CHANCE OF
PRECIPITATION 20 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....44-49.
24 HR TREND......5 DEGREES COOLER.
MIN HUMIDITY........38-44 PERCENT.
24 HR TREND......3 PERCENT WETTER.
20-FOOT WINDS.......WINDY. SOUTH WINDS AROUND 20 MPH WITH GUSTS TO
AROUND 35 MPH UNTIL 1200, THEN WEST AROUND 30
MPH WITH GUSTS TO AROUND 50 MPH.
RIDGE TOP WINDS.....SOUTH 25 TO 30 MPH UNTIL 1200, THEN WEST 30 TO
35 MPH UNTIL 1700, THEN AROUND 30 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....SOUTH 25 TO 30 MPH UNTIL 1100, THEN SOUTHWEST
AROUND 35 MPH UNTIL 1200, THEN WEST 45 TO 50
MPH UNTIL 1600, THEN AROUND 40 MPH UNTIL 1700,
THEN NORTHWEST AROUND 30 MPH.
MIXING HEIGHT.......600-2600 FT AGL UNTIL 1200, THEN 3600-5600 FT
AGL UNTIL 1700, THEN 2600-3000 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 1200, THEN VERY GOOD UNTIL
1300, THEN EXCELLENT UNTIL 1600, THEN VERY GOOD
UNTIL 1700, THEN GOOD.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....15-20.
24 HR TREND......18 DEGREES COOLER.
MAX HUMIDITY........52-58 PERCENT.
24 HR TREND......6 PERCENT DRIER.
HUMIDITY RECOVERY...MODERATE.
20-FOOT WINDS.......BREEZY. WEST WINDS 20 TO 25 MPH WITH GUSTS TO
AROUND 45 MPH UNTIL 0300, THEN NORTHWEST AROUND
15 MPH WITH GUSTS TO AROUND 25 MPH.
RIDGE TOP WINDS.....NORTHWEST 25 TO 30 MPH UNTIL 0500, THEN WEST
AROUND 20 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST 30 TO 35 MPH UNTIL 0100, THEN 20 TO
25 MPH.
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 0400, THEN 800-1200 FT
AGL.
SMOKE DISPERSAL.....POOR.
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY THEN
BECOMING PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....32-37.
24 HR TREND......14 DEGREES COOLER.
MIN HUMIDITY........31-37 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......SOUTHWEST WINDS AROUND 10 MPH UNTIL 1200, THEN
SOUTHEAST WITH HIGHER GUSTS.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH UNTIL 1300, THEN
SOUTHEAST.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTH 10 TO 15 MPH UNTIL 1000, THEN SOUTH.
MIXING HEIGHT.......400-2400 FT AGL.
SMOKE DISPERSAL.....POOR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
NOT AS COLD. PARTLY CLOUDY. LOWS IN THE UPPER
20S. SOUTH WINDS AROUND 15 MPH.
FRIDAY
WARMER. PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS IN THE MID 20S. HIGHS IN THE MID 50S. WEST WINDS
AROUND 15 MPH.
SATURDAY
COLDER. PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW
SHOWERS. LOWS IN THE MID 20S. HIGHS IN THE LOWER 40S. SOUTHWEST
WINDS AROUND 10 MPH.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS IN THE LOWER 30S. HIGHS IN THE MID 40S. SOUTH WINDS
AROUND 10 MPH.
MONDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS IN
THE LOWER 30S. HIGHS IN THE MID 50S.
TUESDAY
PARTLY CLOUDY. HIGHS IN THE LOWER 50S.
WYZ275-172300-
NORTH BIGHORN BASIN/WORLAND BLM-
INCLUDING THE CITIES OF GREYBULL, LOVELL, AND POWELL
501 AM MST WED DEC 17 2025
...HIGH WIND WARNING IN EFFECT FROM 11 AM THIS MORNING TO 5 PM
MST THIS AFTERNOON...
TODAY
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
CHANCE OF RAIN SHOWERS THROUGH THE DAY. SLIGHT
CHANCE OF SNOW SHOWERS IN THE AFTERNOON. CHANCE
OF PRECIPITATION 50 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....43-48.
24 HR TREND......7 DEGREES COOLER.
MIN HUMIDITY........39-45 PERCENT.
24 HR TREND......8 PERCENT WETTER.
20-FOOT WINDS.......BREEZY. SOUTHEAST WINDS AROUND 20 MPH WITH
GUSTS TO AROUND 30 MPH UNTIL 1200, THEN WEST
WITH GUSTS TO AROUND 45 MPH.
RIDGE TOP WINDS.....SOUTHEAST 20 TO 25 MPH UNTIL 1200, THEN
SOUTHWEST UNTIL 1300, THEN WEST.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
TRANSPORT WINDS.....SOUTH AROUND 25 MPH UNTIL 1200, THEN WEST 30 TO
35 MPH UNTIL 1400, THEN 35 TO 40 MPH UNTIL
1700, THEN NORTHWEST AROUND 30 MPH.
MIXING HEIGHT.......400-2000 FT AGL UNTIL 1200, THEN 3000-5000 FT
AGL UNTIL 1700, THEN 2200-3000 FT AGL.
SMOKE DISPERSAL.....FAIR TO GOOD UNTIL 1300, THEN VERY GOOD UNTIL
1700, THEN GOOD.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....16-21.
24 HR TREND......15 DEGREES COOLER.
MAX HUMIDITY........55-61 PERCENT.
24 HR TREND......4 PERCENT DRIER.
HUMIDITY RECOVERY...MODERATE.
20-FOOT WINDS.......BREEZY. NORTHWEST WINDS 20 TO 25 MPH WITH GUSTS
TO AROUND 40 MPH.
RIDGE TOP WINDS.....NORTHWEST AROUND 30 MPH UNTIL 0500, THEN AROUND
20 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST 30 TO 35 MPH UNTIL 0400, THEN 20 TO
25 MPH.
MIXING HEIGHT.......1000-3000 FT AGL UNTIL 2300, THEN 600-1200 FT
AGL.
SMOKE DISPERSAL.....POOR.
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....31-36.
24 HR TREND......14 DEGREES COOLER.
MIN HUMIDITY........37-43 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......NORTHWEST WINDS AROUND 10 MPH AND GUSTY UNTIL
0900, THEN SOUTH WITH GUSTS TO AROUND 25 MPH.
RIDGE TOP WINDS.....NORTHWEST AROUND 15 MPH UNTIL 1000, THEN
SOUTHEAST.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH UNTIL 0900, THEN WEST
UNTIL 1000, THEN SOUTH.
MIXING HEIGHT.......400-2400 FT AGL.
SMOKE DISPERSAL.....POOR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
NOT AS COLD. MOSTLY CLOUDY. SLIGHT CHANCE OF
SHOWERS AND SNOW SHOWERS AFTER MIDNIGHT. LOWS IN THE UPPER 20S.
SOUTH WINDS AROUND 15 MPH.
FRIDAY
WARMER. SNOW SHOWERS LIKELY AND CHANCE OF SHOWERS. LOWS
IN THE MID 20S. HIGHS IN THE LOWER 50S. WEST WINDS AROUND 15 MPH.
SATURDAY
COLDER. PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW
SHOWERS. LOWS IN THE LOWER 20S. HIGHS IN THE UPPER 30S. WINDS
GENERALLY LESS THAN 10 MPH.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS AROUND 30. HIGHS IN THE LOWER 40S. SOUTH WINDS
AROUND 10 MPH.
MONDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS
AROUND 30. HIGHS AROUND 50.
TUESDAY
PARTLY CLOUDY. HIGHS IN THE UPPER 40S.
WYZ276-172300-
CODY FOOTHILLS-
INCLUDING THE CITIES OF CLARK, CODY, AND MEETEETSE
501 AM MST WED DEC 17 2025
..HIGH WIND WARNING IN EFFECT UNTIL 5 AM MST THURSDAY
TODAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY. RAIN
SHOWERS LIKELY IN THE MORNING. CHANCE OF RAIN
SHOWERS AND SNOW SHOWERS IN THE AFTERNOON. NO
SNOW ACCUMULATION. CHANCE OF PRECIPITATION 70
PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....48-53.
24 HR TREND......3 DEGREES COOLER.
MIN HUMIDITY........31-37 PERCENT.
24 HR TREND......1 PERCENT WETTER.
20-FOOT WINDS.......WINDY. WEST WINDS 30 TO 35 MPH. GUSTS UP TO 55
MPH UNTIL 1200, THEN 60 MPH.
RIDGE TOP WINDS.....SOUTHWEST 35 TO 40 MPH UNTIL 1100. WEST AFTER
1700.
CHC OF WETTING RAIN.10 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 35 TO 40 MPH UNTIL 1000, THEN WEST 45
TO 50 MPH UNTIL 1300, THEN 55 TO 60 MPH UNTIL
1600, THEN 45 TO 50 MPH.
MIXING HEIGHT.......600-2400 FT AGL UNTIL 1100. 3400-5400 FT AGL
AFTER 1400.
SMOKE DISPERSAL.....FAIR TO GOOD UNTIL 1100, THEN VERY GOOD TO
EXCELLENT UNTIL 1300, THEN EXCELLENT UNTIL
1700, THEN VERY GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....20-25.
24 HR TREND......21 DEGREES COOLER.
MAX HUMIDITY........42-48 PERCENT.
24 HR TREND......5 PERCENT DRIER.
HUMIDITY RECOVERY...MODERATE.
20-FOOT WINDS.......VERY WINDY. WEST WINDS AROUND 40 MPH WITH GUSTS
TO AROUND 70 MPH UNTIL 0300, THEN AROUND 25 MPH
WITH GUSTS TO AROUND 45 MPH.
RIDGE TOP WINDS.....WEST 40 TO 45 MPH UNTIL 2000, THEN 45 TO 50 MPH
UNTIL 0200, THEN 35 TO 40 MPH UNTIL 0400, THEN
25 TO 30 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 45 TO 50 MPH UNTIL 0200. 25 TO 30 MPH
AFTER 0400.
MIXING HEIGHT.......2000-4000 FT AGL UNTIL 2000, THEN 600-2000 FT
AGL.
SMOKE DISPERSAL.....POOR.
THURSDAY
SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS
LATE IN THE MORNING. CHANCE OF SNOW SHOWERS
LATE IN THE AFTERNOON. CHANCE OF SNOW 50
PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....37-42.
24 HR TREND......12 DEGREES COOLER.
MIN HUMIDITY........32-38 PERCENT.
24 HR TREND......3 PERCENT WETTER.
20-FOOT WINDS.......SOUTHWEST WINDS AROUND 15 MPH WITH GUSTS TO
AROUND 25 MPH UNTIL 1500, THEN SOUTH WITH GUSTS
TO AROUND 30 MPH.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH UNTIL 1300, THEN SOUTH
20 TO 25 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH UNTIL 1400, THEN AROUND
25 MPH.
MIXING HEIGHT.......800-2800 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
PARTLY CLOUDY. CHANCE OF SNOW SHOWERS IN THE
EVENING, THEN CHANCE OF SHOWERS AND SNOW SHOWERS AFTER MIDNIGHT.
LOWS IN THE LOWER 30S. SOUTHWEST WINDS AROUND 20 MPH.
FRIDAY
WARMER. MOSTLY CLOUDY. SNOW SHOWERS AND SHOWERS LIKELY.
LOWS IN THE MID 20S. HIGHS IN THE LOWER 50S. WEST WINDS AROUND
20 MPH.
SATURDAY
COLDER. PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW
SHOWERS. LOWS IN THE LOWER 20S. HIGHS IN THE UPPER 30S. WEST
WINDS AROUND 10 MPH.
SUNDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS IN THE LOWER 30S. HIGHS IN THE LOWER 40S. SOUTHWEST
WINDS AROUND 10 MPH.
MONDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS IN THE LOWER 30S. HIGHS AROUND 50.
TUESDAY
PARTLY CLOUDY. HIGHS IN THE UPPER 40S.
WYZ287-172300-
OWL CREEK MOUNTAINS-
501 AM MST WED DEC 17 2025
..HIGH WIND WARNING IN EFFECT UNTIL 5 PM MST THIS AFTERNOON
TODAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
CHANCE OF RAIN SHOWERS AND SNOW SHOWERS. CHANCE
OF PRECIPITATION 50 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....44-49.
24 HR TREND......6 DEGREES COOLER.
MIN HUMIDITY........33-39 PERCENT.
24 HR TREND......9 PERCENT WETTER.
20-FOOT WINDS.......VERY WINDY. SOUTHWEST WINDS AROUND 30 MPH WITH
GUSTS TO AROUND 50 MPH UNTIL 0900, THEN WEST
AROUND 40 MPH WITH GUSTS TO AROUND 70 MPH.
RIDGE TOP WINDS.....SOUTHWEST 30 TO 35 MPH UNTIL 0800, THEN 40 TO
45 MPH UNTIL 1100, THEN 50 TO 55 MPH UNTIL
1300, THEN WEST 40 TO 45 MPH.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 35 TO 40 MPH UNTIL 0800, THEN 45 TO
50 MPH UNTIL 1100, THEN WEST 55 TO 60 MPH UNTIL
1500, THEN 45 TO 50 MPH UNTIL 1700, THEN AROUND
40 MPH.
MIXING HEIGHT.......600-2600 FT AGL UNTIL 1200, THEN 3000-5000 FT
AGL UNTIL 1700, THEN 1800-2600 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 1100, THEN VERY GOOD UNTIL
1300, THEN EXCELLENT UNTIL 1600, THEN VERY GOOD
TO EXCELLENT UNTIL 1700, THEN GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....18-23.
24 HR TREND......18 DEGREES COOLER.
MAX HUMIDITY........40-46 PERCENT.
24 HR TREND......10 PERCENT DRIER.
HUMIDITY RECOVERY...MODERATE.
20-FOOT WINDS.......VERY WINDY. WEST WINDS 35 TO 40 MPH WITH GUSTS
TO AROUND 65 MPH UNTIL 0300, THEN NORTHWEST
AROUND 25 MPH WITH GUSTS TO AROUND 35 MPH.
RIDGE TOP WINDS.....WEST 40 TO 45 MPH UNTIL 0200. AROUND 20 MPH
AFTER 0500.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST 40 TO 45 MPH UNTIL 0200. AROUND 20
MPH AFTER 0500.
MIXING HEIGHT.......600-2600 FT AGL.
SMOKE DISPERSAL.....POOR.
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY THEN
BECOMING PARTLY CLOUDY. SLIGHT CHANCE OF SNOW
SHOWERS LATE IN THE AFTERNOON. CHANCE OF SNOW
20 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....33-38.
24 HR TREND......12 DEGREES COOLER.
MIN HUMIDITY........28-34 PERCENT.
24 HR TREND......2 PERCENT DRIER.
20-FOOT WINDS.......SOUTHWEST WINDS 10 TO 15 MPH WITH HIGHER GUSTS.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH UNTIL 0800, THEN
SOUTHWEST UNTIL 1400, THEN 20 TO 25 MPH.
MIXING HEIGHT.......200-2200 FT AGL.
SMOKE DISPERSAL.....POOR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
BREEZY. PARTLY CLOUDY. SLIGHT CHANCE OF SNOW
SHOWERS IN THE EVENING, THEN CHANCE OF SHOWERS AND SNOW SHOWERS
AFTER MIDNIGHT. LOWS IN THE UPPER 20S. SOUTHWEST WINDS AROUND
25 MPH.
FRIDAY
NOT AS COOL. BREEZY. SNOW SHOWERS AND SHOWERS LIKELY.
LOWS IN THE MID 20S. HIGHS IN THE UPPER 40S. WEST WINDS AROUND
25 MPH.
SATURDAY
COLDER. PARTLY CLOUDY WITH CHANCE OF SNOW SHOWERS.
LOWS IN THE MID 20S. HIGHS IN THE UPPER 30S. WEST WINDS AROUND
15 MPH.
SUNDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SNOW SHOWERS.
LOWS IN THE LOWER 30S. HIGHS IN THE LOWER 40S. SOUTHWEST WINDS
AROUND 10 MPH.
MONDAY
PARTLY CLOUDY WITH CHANCE OF SNOW SHOWERS AND SLIGHT
CHANCE OF SHOWERS. LOWS IN THE LOWER 30S. HIGHS IN THE UPPER 40S.
TUESDAY
PARTLY CLOUDY. HIGHS IN THE UPPER 40S.
WYZ286-172300-
ABSAROKA MOUNTAINS/NORTH SHOSHONE NF-
INCLUDING THE CITY OF PAHASKA
501 AM MST WED DEC 17 2025
..WINTER STORM WARNING IN EFFECT UNTIL 11 PM MST THIS EVENING
TODAY
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
BLOWING SNOW UNTIL LATE AFTERNOON. PATCHY
BLOWING SNOW LATE IN THE AFTERNOON, THEN
BLOWING SNOW LATE IN THE AFTERNOON. SNOW
SHOWERS AND CHANCE OF RAIN SHOWERS IN THE
MORNING. SNOW SHOWERS LIKELY AND SLIGHT CHANCE
OF RAIN SHOWERS IN THE AFTERNOON. SNOW
ACCUMULATION UP TO 9 INCHES. CHANCE OF
PRECIPITATION NEAR 100 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....39-44.
24 HR TREND......2 DEGREES COOLER.
MIN HUMIDITY........49-55 PERCENT.
24 HR TREND......2 PERCENT WETTER.
20-FOOT WINDS.......VERY WINDY. SOUTHWEST WINDS 30 TO 35 MPH WITH
GUSTS TO AROUND 55 MPH UNTIL 1200, THEN WEST
AROUND 40 MPH WITH GUSTS TO AROUND 60 MPH.
RIDGE TOP WINDS.....SOUTHWEST 35 TO 40 MPH UNTIL 1100, THEN WEST 40
TO 45 MPH.
CHC OF WETTING RAIN.70 PERCENT UNTIL 1200, THEN 35 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 35 TO 40 MPH UNTIL 1100, THEN WEST 45
TO 50 MPH UNTIL 1300, THEN 50 TO 55 MPH UNTIL
1600, THEN AROUND 45 MPH.
MIXING HEIGHT.......1000-3000 FT AGL UNTIL 1300, THEN 2600-4600 FT
AGL.
SMOKE DISPERSAL.....GOOD TO VERY GOOD UNTIL 1300, THEN VERY GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS IN
THE EVENING. BLOWING SNOW IN THE EVENING.
PATCHY BLOWING SNOW AFTER MIDNIGHT. CHANCE OF
SNOW 20 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....12-17.
24 HR TREND......20 DEGREES COOLER.
MAX HUMIDITY........59-65 PERCENT.
24 HR TREND......7 PERCENT DRIER.
HUMIDITY RECOVERY...GOOD.
20-FOOT WINDS.......VERY WINDY. WEST WINDS 35 TO 40 MPH WITH GUSTS
TO AROUND 60 MPH UNTIL 0300, THEN AROUND 25 MPH
WITH GUSTS TO AROUND 40 MPH.
RIDGE TOP WINDS.....WEST 40 TO 45 MPH UNTIL 0200. AROUND 25 MPH
AFTER 0500.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 40 TO 45 MPH UNTIL 0300, THEN 30 TO 35
MPH.
MIXING HEIGHT.......1400-3400 FT AGL UNTIL 2000, THEN 400-1400 FT
AGL.
SMOKE DISPERSAL.....VERY GOOD UNTIL 1900, THEN POOR.
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY THEN
BECOMING PARTLY CLOUDY. CHANCE OF SNOW SHOWERS
LATE IN THE MORNING. SNOW SHOWERS LATE IN THE
AFTERNOON. PATCHY BLOWING SNOW IN THE
AFTERNOON. SNOW ACCUMULATION UP TO 3 INCHES.
CHANCE OF SNOW NEAR 100 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....30-35.
24 HR TREND......8 DEGREES COOLER.
MIN HUMIDITY........48-54 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......BREEZY. WEST WINDS 15 TO 20 MPH UNTIL 1500,
THEN AROUND 25 MPH. GUSTS UP TO 35 MPH UNTIL
1500, THEN 40 MPH.
RIDGE TOP WINDS.....WEST 20 TO 25 MPH UNTIL 1700, THEN AROUND 30
MPH.
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 20 PERCENT.
TRANSPORT WINDS.....WEST 20 TO 25 MPH UNTIL 1300, THEN AROUND 30
MPH.
MIXING HEIGHT.......800-2800 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
WINDY. SNOW SHOWERS. LOWS IN THE MID 20S. WEST
WINDS AROUND 30 MPH.
FRIDAY
BREEZY. SNOW SHOWERS. LOWS AROUND 20. HIGHS IN THE MID
30S. WEST WINDS AROUND 25 MPH.
SATURDAY
PARTLY CLOUDY WITH CHANCE OF SNOW SHOWERS. LOWS
AROUND 18. HIGHS IN THE UPPER 20S. WEST WINDS AROUND 20 MPH.
SUNDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS AND SHOWERS.
LOWS IN THE UPPER 20S. HIGHS IN THE LOWER 30S. WEST WINDS AROUND
15 MPH.
MONDAY
PARTLY CLOUDY WITH SNOW SHOWERS LIKELY AND CHANCE OF
SHOWERS. LOWS IN THE UPPER 20S. HIGHS IN THE UPPER 30S.
TUESDAY
PARTLY CLOUDY. CHANCE OF SNOW SHOWERS IN THE MORNING,
THEN SLIGHT CHANCE OF SNOW SHOWERS IN THE AFTERNOON. HIGHS IN THE
UPPER 30S.
WYZ140-172300-
YELLOWSTONE NATIONAL PARK-
INCLUDING THE CITIES OF LAKE, MAMMOTH, AND OLD FAITHFUL
501 AM MST WED DEC 17 2025
..WINTER STORM WARNING IN EFFECT UNTIL 11 PM MST THIS EVENING
TODAY
SKY/WEATHER.........CLOUDY THEN BECOMING PARTLY CLOUDY. BLOWING
SNOW IN THE MORNING. PATCHY BLOWING SNOW IN THE
AFTERNOON. SNOW SHOWERS AND RAIN SHOWERS IN THE
MORNING. SLIGHT CHANCE OF THUNDERSTORMS THROUGH
THE DAY. SNOW SHOWERS LIKELY IN THE AFTERNOON.
SNOW ACCUMULATION OF 1 TO 7 INCHES. CHANCE OF
PRECIPITATION NEAR 100 PERCENT.
CHANCE OF THUNDER...10 PERCENT.
MAX TEMPERATURE.....35-40.
24 HR TREND......2 DEGREES COOLER.
MIN HUMIDITY........53-59 PERCENT.
24 HR TREND......1 PERCENT WETTER.
20-FOOT WINDS.......WINDY. WEST WINDS 25 TO 30 MPH WITH GUSTS TO
AROUND 45 MPH.
RIDGE TOP WINDS.....SOUTHWEST 30 TO 35 MPH UNTIL 1700, THEN WEST.
CHC OF WETTING RAIN.90 PERCENT UNTIL 1200, THEN 20 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 30 TO 35 MPH UNTIL 1100, THEN WEST 40
TO 45 MPH UNTIL 1700, THEN AROUND 35 MPH.
MIXING HEIGHT.......400-2400 FT AGL UNTIL 1100, THEN 2800-4800 FT
AGL.
SMOKE DISPERSAL.....FAIR TO GOOD UNTIL 1200, THEN VERY GOOD TO
EXCELLENT UNTIL 1700, THEN GOOD TO VERY GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. PATCHY BLOWING SNOW IN THE
EVENING. SLIGHT CHANCE OF SNOW SHOWERS EARLY IN
THE MORNING. CHANCE OF SNOW 20 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....11-16.
24 HR TREND......20 DEGREES COOLER.
MAX HUMIDITY........77-83 PERCENT.
24 HR TREND......3 PERCENT DRIER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......BREEZY. WEST WINDS 20 TO 25 MPH WITH GUSTS TO
AROUND 40 MPH UNTIL 2400, THEN 10 TO 15 MPH
WITH GUSTS TO AROUND 25 MPH.
RIDGE TOP WINDS.....WEST 25 TO 30 MPH UNTIL 0100, THEN 15 TO 20
MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 30 TO 35 MPH UNTIL 2400. AROUND 15 MPH
AFTER 0500.
MIXING HEIGHT.......800-2800 FT AGL.
SMOKE DISPERSAL.....POOR.
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
SLIGHT CHANCE OF SNOW SHOWERS IN THE MORNING,
THEN SNOW SHOWERS LATE IN THE MORNING. PATCHY
BLOWING SNOW LATE IN THE AFTERNOON. SNOW
ACCUMULATION OF 1 TO 4 INCHES. CHANCE OF SNOW
NEAR 100 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....29-34.
24 HR TREND......7 DEGREES COOLER.
MIN HUMIDITY........60-66 PERCENT.
24 HR TREND......11 PERCENT WETTER.
20-FOOT WINDS.......SOUTHWEST WINDS 10 TO 15 MPH. GUSTS UP TO 25
MPH UNTIL 1500, THEN 30 MPH.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 70 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH UNTIL 1100, THEN 25 TO
30 MPH.
MIXING HEIGHT.......800-2800 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
SNOW SHOWERS. LOWS IN THE LOWER 20S. SOUTHWEST
WINDS AROUND 20 MPH.
FRIDAY
SNOW SHOWERS. LOWS AROUND 16. HIGHS IN THE LOWER 30S.
SOUTHWEST WINDS AROUND 20 MPH.
SATURDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS. LOWS
AROUND 16. HIGHS IN THE MID 20S. SOUTHWEST WINDS AROUND 10 MPH.
SUNDAY
SNOW SHOWERS LIKELY. LOWS IN THE UPPER 20S. HIGHS IN
THE LOWER 30S. SOUTHWEST WINDS AROUND 10 MPH.
MONDAY
MOSTLY CLOUDY WITH SNOW SHOWERS LIKELY. LOWS IN THE MID
20S. HIGHS IN THE MID 30S.
TUESDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS. HIGHS IN
THE MID 30S.
WYZ415-172300-
NORTH ZONE BRIDGER TETON NF AND GRAND TETON NP-
INCLUDING THE CITIES OF JACKSON AND MORAN
501 AM MST WED DEC 17 2025
..WINTER STORM WARNING IN EFFECT UNTIL 11 PM MST THIS EVENING
...HIGH WIND WARNING IN EFFECT FROM 11 AM THIS MORNING TO 5 PM
MST THIS AFTERNOON...
TODAY
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
BLOWING SNOW UNTIL LATE AFTERNOON. PATCHY
BLOWING SNOW EARLY IN THE AFTERNOON. SNOW
SHOWERS AND RAIN SHOWERS IN THE MORNING. SLIGHT
CHANCE OF THUNDERSTORMS THROUGH THE DAY. SNOW
SHOWERS AND RAIN SHOWERS LIKELY IN THE
AFTERNOON. SNOW ACCUMULATION UP TO 11 INCHES.
CHANCE OF PRECIPITATION NEAR 100 PERCENT.
CHANCE OF THUNDER...10 PERCENT.
MAX TEMPERATURE.....32-37.
24 HR TREND......5 DEGREES COOLER.
MIN HUMIDITY........63-69 PERCENT.
24 HR TREND......5 PERCENT WETTER.
20-FOOT WINDS.......WINDY. SOUTHWEST WINDS 20 TO 25 MPH WITH GUSTS
TO AROUND 45 MPH UNTIL 1200, THEN WEST 25 TO 30
MPH WITH GUSTS TO AROUND 50 MPH.
RIDGE TOP WINDS.....SOUTHWEST 25 TO 30 MPH UNTIL 1100, THEN WEST 30
TO 35 MPH.
CHC OF WETTING RAIN.95 PERCENT UNTIL 1200, THEN 45 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 25 TO 30 MPH UNTIL 1000, THEN 35 TO
40 MPH UNTIL 1200, THEN WEST 40 TO 45 MPH UNTIL
1600, THEN 30 TO 35 MPH.
MIXING HEIGHT.......1000-3000 FT AGL UNTIL 1300, THEN 2600-4600 FT
AGL.
SMOKE DISPERSAL.....GOOD UNTIL 1300, THEN VERY GOOD TO EXCELLENT
UNTIL 1600, THEN GOOD TO VERY GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. PATCHY BLOWING SNOW IN THE
EVENING. PATCHY BLOWING SNOW AFTER MIDNIGHT.
SLIGHT CHANCE OF SNOW SHOWERS IN THE EVENING.
SLIGHT CHANCE OF SNOW SHOWERS EARLY IN THE
MORNING, THEN CHANCE OF SNOW SHOWERS EARLY IN
THE MORNING. CHANCE OF SNOW 50 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....10-15.
24 HR TREND......19 DEGREES COOLER.
MAX HUMIDITY........80-86 PERCENT.
24 HR TREND......6 PERCENT DRIER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......BREEZY. WEST WINDS AROUND 25 MPH WITH GUSTS TO
AROUND 40 MPH UNTIL 2400, THEN 10 TO 15 MPH
WITH GUSTS TO AROUND 30 MPH.
RIDGE TOP WINDS.....WEST 25 TO 30 MPH UNTIL 0100, THEN 15 TO 20
MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 25 TO 30 MPH UNTIL 0200, THEN 15 TO 20
MPH.
MIXING HEIGHT.......800-2800 FT AGL.
SMOKE DISPERSAL.....POOR.
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
CHANCE OF SNOW SHOWERS IN THE MORNING, THEN
SNOW SHOWERS LATE IN THE MORNING. SNOW
ACCUMULATION OF 2 TO 4 INCHES. CHANCE OF SNOW
NEAR 100 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....28-33.
24 HR TREND......6 DEGREES COOLER.
MIN HUMIDITY........66-72 PERCENT.
24 HR TREND......4 PERCENT WETTER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 0900, THEN
SOUTHWEST AROUND 10 MPH WITH GUSTS TO AROUND 25
MPH.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH.
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 85 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH UNTIL 1300, THEN AROUND
20 MPH.
MIXING HEIGHT.......600-2600 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
NOT AS COLD. SNOW SHOWERS IN THE EVENING, THEN
SNOW SHOWERS AND SHOWERS AFTER MIDNIGHT. LOWS IN THE LOWER 20S.
SOUTHWEST WINDS AROUND 20 MPH.
FRIDAY
SNOW SHOWERS AND SHOWERS. LOWS IN THE LOWER 20S. HIGHS
IN THE LOWER 30S. SOUTHWEST WINDS AROUND 20 MPH.
SATURDAY
SNOW SHOWERS. LOWS AROUND 17. HIGHS IN THE UPPER 20S.
SOUTHWEST WINDS AROUND 15 MPH.
SUNDAY
SNOW SHOWERS AND SHOWERS. LOWS IN THE UPPER 20S. HIGHS
IN THE LOWER 30S. SOUTHWEST WINDS AROUND 10 MPH.
MONDAY
SNOW SHOWERS AND SHOWERS. LOWS IN THE UPPER 20S. HIGHS
IN THE MID 30S.
TUESDAY
MOSTLY CLOUDY. CHANCE OF SNOW SHOWERS IN THE MORNING,
THEN CHANCE OF SNOW SHOWERS AND SLIGHT CHANCE OF SHOWERS IN THE
AFTERNOON. HIGHS IN THE MID 30S.
WYZ416-172300-
WEST WIND RIVER MOUNTAINS/EAST ZONE BRIDGER TETON NF-
501 AM MST WED DEC 17 2025
..WINTER STORM WARNING IN EFFECT UNTIL 11 PM MST THIS EVENING
TODAY
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
AREAS OF BLOWING SNOW EARLY IN THE MORNING.
BLOWING SNOW IN THE LATE MORNING AND EARLY
AFTERNOON, THEN PATCHY BLOWING SNOW LATE IN THE
AFTERNOON. SNOW SHOWERS IN THE MORNING. SNOW
SHOWERS LIKELY IN THE AFTERNOON. SNOW
ACCUMULATION OF 4 TO 13 INCHES. CHANCE OF SNOW
NEAR 100 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....31-36.
24 HR TREND......5 DEGREES COOLER.
MIN HUMIDITY........64-70 PERCENT.
24 HR TREND......10 PERCENT WETTER.
20-FOOT WINDS.......WINDY. SOUTH WINDS AROUND 15 MPH WITH GUSTS TO
AROUND 25 MPH UNTIL 0900, THEN SOUTHWEST AROUND
25 MPH WITH GUSTS TO AROUND 45 MPH UNTIL 1200,
THEN WEST 30 TO 35 MPH WITH GUSTS TO AROUND 60
MPH.
RIDGE TOP WINDS.....SOUTH 20 TO 25 MPH UNTIL 1000, THEN SOUTHWEST
30 TO 35 MPH UNTIL 1200, THEN WEST 40 TO 45 MPH
UNTIL 1600, THEN AROUND 35 MPH.
CHC OF WETTING RAIN.90 PERCENT UNTIL 1200, THEN 50 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 25 TO 30 MPH UNTIL 1000, THEN 35 TO
40 MPH UNTIL 1200, THEN WEST 45 TO 50 MPH UNTIL
1700, THEN AROUND 40 MPH.
MIXING HEIGHT.......800-2800 FT AGL UNTIL 1400, THEN 2200-4000 FT
AGL.
SMOKE DISPERSAL.....GOOD UNTIL 1400, THEN VERY GOOD UNTIL 1700,
THEN GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. PATCHY BLOWING SNOW EARLY IN THE
EVENING. PATCHY BLOWING SNOW IN THE LATE
EVENING AND OVERNIGHT. SLIGHT CHANCE OF SNOW
SHOWERS IN THE EVENING. SLIGHT CHANCE OF SNOW
SHOWERS EARLY IN THE MORNING. CHANCE OF SNOW 20
PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....7-12.
24 HR TREND......19 DEGREES COOLER.
MAX HUMIDITY........75-81 PERCENT.
24 HR TREND......9 PERCENT DRIER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......WINDY. WEST WINDS 25 TO 30 MPH WITH GUSTS TO
AROUND 45 MPH UNTIL 2400, THEN NORTHWEST 15 TO
20 MPH WITH GUSTS TO AROUND 35 MPH.
RIDGE TOP WINDS.....WEST 30 TO 35 MPH UNTIL 0100, THEN NORTHWEST 20
TO 25 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 30 TO 35 MPH UNTIL 0300, THEN NORTHWEST 20
TO 25 MPH.
MIXING HEIGHT.......600-2600 FT AGL.
SMOKE DISPERSAL.....POOR.
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
SLIGHT CHANCE OF SNOW SHOWERS IN THE MORNING,
THEN SNOW SHOWERS LATE IN THE MORNING. SNOW
ACCUMULATION OF 1 TO 3 INCHES. CHANCE OF SNOW
NEAR 100 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....24-29.
24 HR TREND......7 DEGREES COOLER.
MIN HUMIDITY........58-64 PERCENT.
24 HR TREND......6 PERCENT DRIER.
20-FOOT WINDS.......WEST WINDS 10 TO 15 MPH. GUSTS UP TO 20 MPH
UNTIL 1200, THEN 25 MPH.
RIDGE TOP WINDS.....WEST 15 TO 20 MPH.
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 40 PERCENT.
TRANSPORT WINDS.....WEST 15 TO 20 MPH UNTIL 1400, THEN SOUTHWEST 20
TO 25 MPH.
MIXING HEIGHT.......400-2000 FT AGL.
SMOKE DISPERSAL.....POOR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
SNOW SHOWERS. LOWS AROUND 19. SOUTHWEST WINDS
AROUND 15 MPH.
FRIDAY
SNOW SHOWERS. LOWS AROUND 19. HIGHS IN THE LOWER 30S.
SOUTHWEST WINDS AROUND 20 MPH.
SATURDAY
MOSTLY CLOUDY WITH SNOW SHOWERS LIKELY. LOWS AROUND
15. HIGHS IN THE MID 20S. WEST WINDS AROUND 15 MPH.
SUNDAY
SNOW SHOWERS. LOWS IN THE MID 20S. HIGHS AROUND 30.
SOUTHWEST WINDS AROUND 15 MPH.
MONDAY
MOSTLY CLOUDY WITH SNOW SHOWERS LIKELY. LOWS IN THE MID
20S. HIGHS IN THE MID 30S.
TUESDAY
MOSTLY CLOUDY. CHANCE OF SNOW SHOWERS IN THE MORNING,
THEN SLIGHT CHANCE OF SNOW SHOWERS IN THE AFTERNOON. HIGHS IN THE
MID 30S.
WYZ288-172300-
EAST WIND RIVER MOUNTAINS/SOUTH SHOSHONE NF-
INCLUDING THE CITIES OF DUBOIS AND SOUTH PASS
501 AM MST WED DEC 17 2025
..WINTER STORM WARNING IN EFFECT UNTIL 11 PM MST THIS EVENING
TODAY
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
BLOWING SNOW THROUGH THE DAY. SNOW SHOWERS IN
THE MORNING. RAIN SHOWERS LIKELY THROUGH THE
DAY. SNOW SHOWERS LIKELY IN THE AFTERNOON. SNOW
ACCUMULATION UP TO 14 INCHES. CHANCE OF
PRECIPITATION NEAR 100 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....38-43.
24 HR TREND......6 DEGREES COOLER.
MIN HUMIDITY........52-58 PERCENT.
24 HR TREND......14 PERCENT WETTER.
20-FOOT WINDS.......VERY WINDY. WEST WINDS 35 TO 40 MPH. GUSTS UP
TO 60 MPH UNTIL 1200, THEN 65 MPH.
RIDGE TOP WINDS.....WEST 40 TO 45 MPH.
CHC OF WETTING RAIN.70 PERCENT UNTIL 1200, THEN 45 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 40 TO 45 MPH UNTIL 1200, THEN WEST 50
TO 55 MPH UNTIL 1700, THEN AROUND 45 MPH.
MIXING HEIGHT.......1200-3200 FT AGL.
SMOKE DISPERSAL.....GOOD TO VERY GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS IN
THE EVENING. BLOWING SNOW THROUGH THE NIGHT.
CHANCE OF SNOW 20 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....11-16.
24 HR TREND......18 DEGREES COOLER.
MAX HUMIDITY........59-65 PERCENT.
24 HR TREND......9 PERCENT DRIER.
HUMIDITY RECOVERY...GOOD.
20-FOOT WINDS.......WINDY. WEST WINDS 30 TO 35 MPH WITH GUSTS TO
AROUND 60 MPH UNTIL 0300, THEN AROUND 20 MPH
WITH GUSTS TO AROUND 35 MPH.
RIDGE TOP WINDS.....WEST 40 TO 45 MPH UNTIL 2200. AROUND 25 MPH
AFTER 0400.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 40 TO 45 MPH UNTIL 2200. AROUND 25 MPH
AFTER 0500.
MIXING HEIGHT.......400-2400 FT AGL.
SMOKE DISPERSAL.....POOR.
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
CHANCE OF SNOW SHOWERS LATE IN THE MORNING.
PATCHY BLOWING SNOW IN THE AFTERNOON. CHANCE OF
SNOW 50 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....30-35.
24 HR TREND......7 DEGREES COOLER.
MIN HUMIDITY........50-56 PERCENT.
24 HR TREND......5 PERCENT DRIER.
20-FOOT WINDS.......BREEZY. WEST WINDS 15 TO 20 MPH WITH GUSTS TO
AROUND 35 MPH UNTIL 1500, THEN AROUND 25 MPH
WITH GUSTS TO AROUND 45 MPH.
RIDGE TOP WINDS.....WEST 20 TO 25 MPH UNTIL 1400, THEN AROUND 30
MPH.
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 15 PERCENT.
TRANSPORT WINDS.....WEST 20 TO 25 MPH UNTIL 1300, THEN 30 TO 35
MPH.
MIXING HEIGHT.......400-2000 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
NOT AS COLD. WINDY. PARTLY CLOUDY WITH CHANCE
OF SNOW SHOWERS. LOWS IN THE MID 20S. WEST WINDS AROUND 30 MPH.
FRIDAY
WINDY. SNOW SHOWERS. LOWS IN THE MID 20S. HIGHS IN THE
UPPER 30S. WEST WINDS AROUND 30 MPH.
SATURDAY
PARTLY CLOUDY WITH SNOW SHOWERS LIKELY. LOWS AROUND
20. HIGHS IN THE LOWER 30S. WEST WINDS AROUND 20 MPH.
SUNDAY
MOSTLY CLOUDY. SNOW SHOWERS LIKELY AND CHANCE OF
SHOWERS. LOWS IN THE UPPER 20S. HIGHS IN THE MID 30S. WEST WINDS
AROUND 15 MPH.
MONDAY
PARTLY CLOUDY WITH CHANCE OF SNOW SHOWERS AND SHOWERS.
LOWS IN THE UPPER 20S. HIGHS IN THE UPPER 30S.
TUESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW SHOWERS.
HIGHS IN THE UPPER 30S.
WYZ414-172300-
SALT AND WYOMING RANGES/WEST ZONE BRIDGER TETON NF-
INCLUDING THE CITY OF AFTON
501 AM MST WED DEC 17 2025
..WINTER STORM WARNING IN EFFECT UNTIL 11 PM MST THIS EVENING
TODAY
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
AREAS OF BLOWING SNOW EARLY IN THE MORNING.
BLOWING SNOW UNTIL LATE AFTERNOON. PATCHY
BLOWING SNOW LATE IN THE AFTERNOON. SNOW
SHOWERS AND RAIN SHOWERS IN THE MORNING. SNOW
SHOWERS AND RAIN SHOWERS LIKELY IN THE
AFTERNOON. SNOW ACCUMULATION UP TO 11 INCHES.
CHANCE OF PRECIPITATION NEAR 100 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....31-36.
24 HR TREND......8 DEGREES COOLER.
MIN HUMIDITY........66-72 PERCENT.
24 HR TREND......15 PERCENT WETTER.
20-FOOT WINDS.......WINDY. SOUTHWEST WINDS AROUND 20 MPH WITH GUSTS
TO AROUND 30 MPH UNTIL 0900, THEN WEST AROUND
30 MPH WITH GUSTS TO AROUND 50 MPH.
RIDGE TOP WINDS.....SOUTHWEST 25 TO 30 MPH UNTIL 1100, THEN WEST 35
TO 40 MPH UNTIL 1700, THEN AROUND 30 MPH.
CHC OF WETTING RAIN.95 PERCENT UNTIL 1200, THEN 45 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 25 TO 30 MPH UNTIL 1000, THEN WEST 35
TO 40 MPH UNTIL 1400, THEN 45 TO 50 MPH UNTIL
1700, THEN AROUND 35 MPH.
MIXING HEIGHT.......800-2800 FT AGL UNTIL 1400, THEN 2200-4200 FT
AGL.
SMOKE DISPERSAL.....GOOD UNTIL 1400, THEN VERY GOOD UNTIL 1700,
THEN GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. PATCHY BLOWING SNOW EARLY IN THE
EVENING. PATCHY BLOWING SNOW IN THE LATE
EVENING AND EARLY MORNING. SLIGHT CHANCE OF
SNOW SHOWERS EARLY IN THE EVENING. CHANCE OF
SNOW SHOWERS EARLY IN THE MORNING. CHANCE OF
SNOW 50 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....10-15.
24 HR TREND......19 DEGREES COOLER.
MAX HUMIDITY........82-88 PERCENT.
24 HR TREND......7 PERCENT DRIER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......BREEZY. WEST WINDS 20 TO 25 MPH WITH GUSTS TO
AROUND 45 MPH UNTIL 0300, THEN AROUND 15 MPH
AND GUSTY.
RIDGE TOP WINDS.....WEST 25 TO 30 MPH UNTIL 0200, THEN 15 TO 20
MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 30 TO 35 MPH UNTIL 2400. AROUND 15 MPH
AFTER 0500.
MIXING HEIGHT.......600-2600 FT AGL.
SMOKE DISPERSAL.....POOR.
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
CHANCE OF SNOW SHOWERS IN THE MORNING, THEN
SNOW SHOWERS LATE IN THE MORNING. SNOW
ACCUMULATION OF 1 TO 4 INCHES. CHANCE OF SNOW
NEAR 100 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....29-34.
24 HR TREND......4 DEGREES COOLER.
MIN HUMIDITY........66-72 PERCENT.
24 HR TREND......2 PERCENT DRIER.
20-FOOT WINDS.......SOUTHWEST WINDS AROUND 10 MPH. GUSTS UP TO 20
MPH UNTIL 1500, THEN 25 MPH.
RIDGE TOP WINDS.....SOUTHWEST AROUND 15 MPH.
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 85 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH.
MIXING HEIGHT.......400-2000 FT AGL.
SMOKE DISPERSAL.....POOR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
NOT AS COLD. SNOW SHOWERS IN THE EVENING, THEN
SNOW SHOWERS AND SHOWERS LIKELY AFTER MIDNIGHT. LOWS IN THE MID
20S. SOUTHWEST WINDS AROUND 20 MPH.
FRIDAY
SNOW SHOWERS AND SHOWERS. LOWS IN THE MID 20S. HIGHS IN
THE MID 30S. SOUTHWEST WINDS AROUND 20 MPH.
SATURDAY
SNOW SHOWERS. LOWS AROUND 20. HIGHS IN THE UPPER 20S.
SOUTHWEST WINDS AROUND 10 MPH.
SUNDAY
SNOW SHOWERS AND SHOWERS. LOWS AROUND 30. HIGHS IN THE
MID 30S. SOUTHWEST WINDS AROUND 10 MPH.
MONDAY
MOSTLY CLOUDY WITH SNOW SHOWERS AND SHOWERS. LOWS IN
THE UPPER 20S. HIGHS IN THE UPPER 30S.
TUESDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS AND SHOWERS.
HIGHS IN THE UPPER 30S.
WYZ278-172300-
UPPER GREEN RIVER BASIN/ROCK SPRINGS BLM-
INCLUDING THE CITIES OF BIG PINEY, FARSON, AND PINEDALE
501 AM MST WED DEC 17 2025
..HIGH WIND WARNING IN EFFECT UNTIL 5 PM MST THIS AFTERNOON
TODAY
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
PATCHY BLOWING SNOW IN THE MORNING. BLOWING
SNOW LATE IN THE MORNING. PATCHY BLOWING SNOW
LATE IN THE AFTERNOON. RAIN SHOWERS LIKELY IN
THE MORNING. SNOW SHOWERS LIKELY THROUGH THE
DAY. CHANCE OF RAIN SHOWERS IN THE AFTERNOON.
SNOW ACCUMULATION UP TO 4 INCHES. CHANCE OF
PRECIPITATION NEAR 100 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....36-41.
24 HR TREND......8 DEGREES COOLER.
MIN HUMIDITY........58-64 PERCENT.
24 HR TREND......12 PERCENT WETTER.
20-FOOT WINDS.......WINDY. SOUTHWEST WINDS AROUND 15 MPH WITH GUSTS
TO AROUND 25 MPH UNTIL 0900, THEN WEST 30 TO 35
MPH WITH GUSTS TO AROUND 60 MPH.
RIDGE TOP WINDS.....SOUTH 15 TO 20 MPH UNTIL 0800, THEN SOUTHWEST
25 TO 30 MPH UNTIL 1000, THEN 35 TO 40 MPH
UNTIL 1400, THEN WEST AROUND 45 MPH UNTIL 1600,
THEN AROUND 35 MPH.
CHC OF WETTING RAIN.45 PERCENT UNTIL 1200, THEN 30 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH UNTIL 0800, THEN 25 TO
30 MPH UNTIL 1000, THEN 35 TO 40 MPH UNTIL
1200, THEN WEST 45 TO 50 MPH UNTIL 1700, THEN
AROUND 40 MPH.
MIXING HEIGHT.......600-2600 FT AGL UNTIL 1400, THEN 2200-3600 FT
AGL.
SMOKE DISPERSAL.....GOOD TO VERY GOOD UNTIL 1500, THEN VERY GOOD
UNTIL 1700, THEN GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....12-17.
24 HR TREND......15 DEGREES COOLER.
MAX HUMIDITY........72-78 PERCENT.
24 HR TREND......8 PERCENT DRIER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......WINDY. WEST WINDS 25 TO 30 MPH WITH GUSTS TO
AROUND 45 MPH UNTIL 0300, THEN AROUND 20 MPH
WITH GUSTS TO AROUND 30 MPH.
RIDGE TOP WINDS.....WEST 30 TO 35 MPH UNTIL 0300, THEN 20 TO 25
MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST 35 TO 40 MPH UNTIL 2400. AROUND 20
MPH AFTER 0500.
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 0100, THEN 600-1200 FT
AGL.
SMOKE DISPERSAL.....POOR.
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
CHANCE OF SNOW SHOWERS LATE IN THE MORNING.
CHANCE OF SNOW 50 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....30-35.
24 HR TREND......6 DEGREES COOLER.
MIN HUMIDITY........49-55 PERCENT.
24 HR TREND......10 PERCENT DRIER.
20-FOOT WINDS.......WEST WINDS AROUND 10 MPH UNTIL 0900, THEN
UPSLOPE/UPVALLEY 5-9 MPH UNTIL 1200, THEN WEST
AROUND 10 MPH. GUSTS UP TO 20 MPH.
RIDGE TOP WINDS.....WEST 10 TO 15 MPH.
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 10 PERCENT.
TRANSPORT WINDS.....WEST 10 TO 15 MPH UNTIL 1300, THEN 15 TO 20
MPH.
MIXING HEIGHT.......600-2600 FT AGL.
SMOKE DISPERSAL.....POOR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
NOT AS COLD. MOSTLY CLOUDY. CHANCE OF SNOW
SHOWERS IN THE EVENING, THEN CHANCE OF SNOW SHOWERS AND SLIGHT
CHANCE OF SHOWERS AFTER MIDNIGHT. LOWS IN THE MID 20S. SOUTHWEST
WINDS AROUND 15 MPH.
FRIDAY
SNOW SHOWERS WITH SHOWERS LIKELY. LOWS IN THE MID 20S.
HIGHS IN THE LOWER 40S. WEST WINDS AROUND 20 MPH.
SATURDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS. LOWS
AROUND 19. HIGHS IN THE UPPER 30S. WEST WINDS AROUND 15 MPH.
SUNDAY
MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND SNOW SHOWERS.
LOWS IN THE UPPER 20S. HIGHS IN THE UPPER 30S. SOUTHWEST WINDS
AROUND 10 MPH.
MONDAY
MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND SNOW SHOWERS.
LOWS IN THE MID 20S. HIGHS IN THE LOWER 40S.
TUESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW SHOWERS.
HIGHS IN THE LOWER 40S.
WYZ277-172300-
LINCOLN AND UINTA COUNTIES/LOWER ELEVATIONS-
INCLUDING THE CITIES OF EVANSTON, FORT BRIDGER, AND KEMMERER
501 AM MST WED DEC 17 2025
..WINTER STORM WARNING IN EFFECT UNTIL 11 PM MST THIS EVENING
..HIGH WIND WARNING IN EFFECT UNTIL 5 PM MST THIS AFTERNOON
TODAY
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. RAIN
SHOWERS AND SNOW SHOWERS IN THE MORNING. RAIN
SHOWERS AND SNOW SHOWERS LIKELY IN THE
AFTERNOON. BLOWING SNOW LATE IN THE MORNING.
PATCHY BLOWING SNOW EARLY IN THE AFTERNOON.
SNOW ACCUMULATION UP TO 2 INCHES. CHANCE OF
PRECIPITATION NEAR 100 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....38-43.
24 HR TREND......7 DEGREES COOLER.
MIN HUMIDITY........55-61 PERCENT.
24 HR TREND......16 PERCENT WETTER.
20-FOOT WINDS.......VERY WINDY. SOUTHWEST WINDS AROUND 25 MPH WITH
GUSTS TO AROUND 40 MPH UNTIL 0900, THEN WEST 35
TO 40 MPH WITH GUSTS TO AROUND 60 MPH.
RIDGE TOP WINDS.....SOUTHWEST 25 TO 30 MPH UNTIL 0800, THEN 35 TO
40 MPH UNTIL 1200, THEN WEST 40 TO 45 MPH UNTIL
1700, THEN AROUND 35 MPH.
CHC OF WETTING RAIN.52 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 30 TO 35 MPH UNTIL 1000, THEN WEST 40
TO 45 MPH UNTIL 1600, THEN AROUND 50 MPH UNTIL
1700, THEN AROUND 40 MPH.
MIXING HEIGHT.......1000-3000 FT AGL.
SMOKE DISPERSAL.....GOOD TO VERY GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS
EARLY IN THE MORNING. CHANCE OF SNOW 20
PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....16-21.
24 HR TREND......15 DEGREES COOLER.
MAX HUMIDITY........75-81 PERCENT.
24 HR TREND......9 PERCENT DRIER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......WINDY. WEST WINDS 30 TO 35 MPH WITH GUSTS TO
AROUND 50 MPH UNTIL 2400. AROUND 15 MPH WITH
GUSTS TO AROUND 25 MPH AFTER 0300.
RIDGE TOP WINDS.....WEST 35 TO 40 MPH UNTIL 2400. AROUND 20 MPH
AFTER 0400.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 35 TO 40 MPH UNTIL 2400. AROUND 20 MPH
AFTER 0400.
MIXING HEIGHT.......600-2600 FT AGL.
SMOKE DISPERSAL.....POOR.
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
SLIGHT CHANCE OF SNOW SHOWERS IN THE MORNING,
THEN CHANCE OF SNOW SHOWERS LATE IN THE
MORNING. CHANCE OF SNOW 50 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....34-39.
24 HR TREND......3 DEGREES COOLER.
MIN HUMIDITY........47-53 PERCENT.
24 HR TREND......6 PERCENT DRIER.
20-FOOT WINDS.......WEST WINDS 10 TO 15 MPH WITH GUSTS TO AROUND 25
MPH UNTIL 1500, THEN AROUND 20 MPH WITH GUSTS
TO AROUND 30 MPH.
RIDGE TOP WINDS.....WEST 15 TO 20 MPH UNTIL 1500, THEN AROUND 25
MPH.
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 10 PERCENT.
TRANSPORT WINDS.....WEST 15 TO 20 MPH UNTIL 1400, THEN AROUND 25
MPH.
MIXING HEIGHT.......600-2600 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
NOT AS COLD. PARTLY CLOUDY. CHANCE OF SNOW
SHOWERS IN THE EVENING, THEN SLIGHT CHANCE OF SHOWERS AND SNOW
SHOWERS AFTER MIDNIGHT. LOWS AROUND 30. SOUTHWEST WINDS AROUND
20 MPH.
FRIDAY
SNOW SHOWERS AND SHOWERS. LOWS AROUND 30. HIGHS IN THE
MID 40S. WEST WINDS AROUND 20 MPH.
SATURDAY
MOSTLY CLOUDY WITH SNOW SHOWERS LIKELY AND CHANCE OF
SHOWERS. LOWS IN THE MID 20S. HIGHS IN THE UPPER 30S. WEST WINDS
AROUND 15 MPH.
SUNDAY
MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND SNOW SHOWERS.
LOWS IN THE LOWER 30S. HIGHS AROUND 40. SOUTHWEST WINDS AROUND
10 MPH.
MONDAY
MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND SNOW SHOWERS.
LOWS IN THE UPPER 20S. HIGHS IN THE MID 40S.
TUESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND SNOW
SHOWERS IN THE MORNING, THEN SLIGHT CHANCE OF SNOW SHOWERS IN THE
AFTERNOON. HIGHS IN THE MID 40S.
WYZ279-172300-
SWEETWATER COUNTY/ROCK SPRINGS BLM/FLAMING GORGE NRA-
INCLUDING THE CITIES OF GREEN RIVER, ROCK SPRINGS, AND WAMSUTTER
501 AM MST WED DEC 17 2025
..HIGH WIND WARNING IN EFFECT UNTIL 11 PM MST THIS EVENING
TODAY
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY THEN
BECOMING MOSTLY CLOUDY THEN BECOMING PARTLY
CLOUDY. CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF SNOW SHOWERS IN THE MORNING. RAIN
SHOWERS LIKELY AND CHANCE OF SNOW SHOWERS IN
THE AFTERNOON. LITTLE OR NO SNOW ACCUMULATION.
CHANCE OF PRECIPITATION 70 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....41-46.
24 HR TREND......5 DEGREES COOLER.
MIN HUMIDITY........44-50 PERCENT.
24 HR TREND......15 PERCENT WETTER.
20-FOOT WINDS.......VERY WINDY. SOUTHWEST WINDS AROUND 20 MPH WITH
GUSTS TO AROUND 35 MPH UNTIL 0900. WEST 35 TO
40 MPH WITH GUSTS TO AROUND 60 MPH AFTER 1200.
RIDGE TOP WINDS.....SOUTHWEST 25 TO 30 MPH UNTIL 1000. WEST 40 TO
45 MPH AFTER 1300.
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 35 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 25 TO 30 MPH UNTIL 1000, THEN 35 TO
40 MPH UNTIL 1200, THEN WEST 45 TO 50 MPH UNTIL
1700, THEN AROUND 40 MPH.
MIXING HEIGHT.......1200-3200 FT AGL.
SMOKE DISPERSAL.....GOOD TO VERY GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....21-26.
24 HR TREND......13 DEGREES COOLER.
MAX HUMIDITY........70-76 PERCENT.
24 HR TREND......4 PERCENT WETTER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......WINDY. WEST WINDS 30 TO 35 MPH WITH GUSTS TO
AROUND 55 MPH UNTIL 0300, THEN AROUND 25 MPH
WITH GUSTS TO AROUND 40 MPH.
RIDGE TOP WINDS.....WEST 35 TO 40 MPH UNTIL 0200, THEN 25 TO 30
MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 40 TO 45 MPH UNTIL 2300, THEN 30 TO 35
MPH.
MIXING HEIGHT.......1400-3400 FT AGL UNTIL 0400, THEN 800-1400 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....35-40.
24 HR TREND......6 DEGREES COOLER.
MIN HUMIDITY........30-36 PERCENT.
24 HR TREND......17 PERCENT DRIER.
20-FOOT WINDS.......WEST WINDS 15 TO 20 MPH WITH GUSTS TO AROUND 25
MPH.
RIDGE TOP WINDS.....WEST 20 TO 25 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 25 TO 30 MPH UNTIL 1600, THEN SOUTHWEST
AROUND 20 MPH.
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 1700, THEN 600-1000 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 30S. SOUTHWEST
WINDS AROUND 20 MPH.
FRIDAY
WARMER. PARTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT
CHANCE OF SNOW SHOWERS. LOWS IN THE LOWER 30S. HIGHS IN THE LOWER
50S. SOUTHWEST WINDS AROUND 20 MPH.
SATURDAY
MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS IN THE UPPER 20S. HIGHS IN THE LOWER 40S. WEST
WINDS AROUND 15 MPH.
SUNDAY
MOSTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS IN THE LOWER 30S. HIGHS IN THE MID 40S. SOUTHWEST
WINDS AROUND 10 MPH.
MONDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS IN
THE LOWER 30S. HIGHS IN THE UPPER 40S.
TUESDAY
PARTLY CLOUDY. HIGHS AROUND 50.
WYZ289-172300-
GRANITE/GREEN/FERRIS/RATTLESNAKE MOUNTAINS-
INCLUDING THE CITY OF JEFFREY CITY
501 AM MST WED DEC 17 2025
..HIGH WIND WARNING IN EFFECT UNTIL 11 PM MST THIS EVENING
TODAY
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. SNOW
SHOWERS LIKELY IN THE MORNING. CHANCE OF RAIN
SHOWERS THROUGH THE DAY. CHANCE OF SNOW SHOWERS
IN THE AFTERNOON. LITTLE OR NO SNOW
ACCUMULATION. CHANCE OF PRECIPITATION 70
PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....43-48.
24 HR TREND......5 DEGREES COOLER.
MIN HUMIDITY........41-47 PERCENT.
24 HR TREND......12 PERCENT WETTER.
20-FOOT WINDS.......VERY WINDY. SOUTHWEST WINDS AROUND 30 MPH WITH
GUSTS TO AROUND 50 MPH UNTIL 0900, THEN WEST
AROUND 40 MPH WITH GUSTS TO AROUND 65 MPH.
RIDGE TOP WINDS.....SOUTHWEST 30 TO 35 MPH UNTIL 0800, THEN 40 TO
45 MPH UNTIL 1300, THEN WEST 45 TO 50 MPH UNTIL
1700, THEN AROUND 40 MPH.
CHC OF WETTING RAIN.12 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 35 TO 40 MPH UNTIL 0900, THEN 45 TO
50 MPH UNTIL 1300, THEN WEST 50 TO 55 MPH UNTIL
1700, THEN AROUND 45 MPH.
MIXING HEIGHT.......600-2600 FT AGL UNTIL 1300, THEN 1800-3800 FT
AGL.
SMOKE DISPERSAL.....VERY GOOD UNTIL 1700, THEN GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....19-24.
24 HR TREND......17 DEGREES COOLER.
MAX HUMIDITY........58-64 PERCENT.
24 HR TREND......8 PERCENT DRIER.
HUMIDITY RECOVERY...GOOD.
20-FOOT WINDS.......WINDY. WEST WINDS 30 TO 35 MPH WITH GUSTS TO
AROUND 55 MPH UNTIL 0300, THEN AROUND 25 MPH
WITH GUSTS TO AROUND 40 MPH.
RIDGE TOP WINDS.....WEST 35 TO 40 MPH UNTIL 0300, THEN 25 TO 30
MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 40 TO 45 MPH UNTIL 2200. AROUND 25 MPH
AFTER 0500.
MIXING HEIGHT.......600-2600 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS
LATE IN THE AFTERNOON. CHANCE OF SNOW 20
PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....33-38.
24 HR TREND......10 DEGREES COOLER.
MIN HUMIDITY........36-42 PERCENT.
24 HR TREND......6 PERCENT DRIER.
20-FOOT WINDS.......BREEZY. SOUTHWEST WINDS 15 TO 20 MPH WITH GUSTS
TO AROUND 35 MPH UNTIL 1500, THEN AROUND 25 MPH
WITH GUSTS TO AROUND 40 MPH.
RIDGE TOP WINDS.....WEST 20 TO 25 MPH UNTIL 1400, THEN SOUTHWEST
AROUND 30 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 20 TO 25 MPH UNTIL 1300, THEN SOUTHWEST
AROUND 30 MPH.
MIXING HEIGHT.......800-2800 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
WINDY. PARTLY CLOUDY. SLIGHT CHANCE OF SNOW
SHOWERS IN THE EVENING. LOWS AROUND 30. SOUTHWEST WINDS AROUND
30 MPH.
FRIDAY
NOT AS COOL. WINDY. PARTLY CLOUDY. CHANCE OF SHOWERS
AND SNOW SHOWERS. LOWS IN THE LOWER 30S. HIGHS IN THE UPPER 40S.
WEST WINDS AROUND 30 MPH.
SATURDAY
PARTLY CLOUDY WITH CHANCE OF SNOW SHOWERS. LOWS IN
THE UPPER 20S. HIGHS AROUND 40. WEST WINDS AROUND 20 MPH.
SUNDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE
OF SNOW SHOWERS. LOWS IN THE MID 30S. HIGHS IN THE LOWER 40S.
SOUTHWEST WINDS AROUND 15 MPH.
MONDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS IN THE LOWER 30S. HIGHS IN THE UPPER 40S.
TUESDAY
PARTLY CLOUDY. HIGHS IN THE UPPER 40S.
WYZ300-172300-
CASPER MOUNTAIN-
501 AM MST WED DEC 17 2025
..HIGH WIND WARNING IN EFFECT UNTIL 11 PM MST THIS EVENING
TODAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY THEN
BECOMING PARTLY CLOUDY. RAIN SHOWERS AND SNOW
SHOWERS LIKELY IN THE AFTERNOON. LITTLE OR NO
SNOW ACCUMULATION. CHANCE OF PRECIPITATION 60
PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....42-47.
24 HR TREND......4 DEGREES COOLER.
MIN HUMIDITY........34-40 PERCENT.
24 HR TREND......3 PERCENT WETTER.
20-FOOT WINDS.......VERY WINDY. SOUTHWEST WINDS 30 TO 35 MPH WITH
GUSTS TO AROUND 60 MPH UNTIL 1200, THEN WEST 35
TO 40 MPH WITH GUSTS TO AROUND 60 MPH.
RIDGE TOP WINDS.....SOUTHWEST 30 TO 35 MPH UNTIL 0900, THEN 40 TO
45 MPH.
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 20 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 35 TO 40 MPH UNTIL 1000, THEN 50 TO
55 MPH UNTIL 1600, THEN WEST AROUND 45 MPH.
MIXING HEIGHT.......800-2800 FT AGL UNTIL 1300, THEN 1800-3800 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 1000, THEN VERY GOOD UNTIL
1600, THEN GOOD.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....17-22.
24 HR TREND......18 DEGREES COOLER.
MAX HUMIDITY........49-55 PERCENT.
24 HR TREND......9 PERCENT DRIER.
HUMIDITY RECOVERY...MODERATE.
20-FOOT WINDS.......WINDY. WEST WINDS 30 TO 35 MPH. GUSTS UP TO 55
MPH UNTIL 0300, THEN 45 MPH.
RIDGE TOP WINDS.....WEST 35 TO 40 MPH UNTIL 0500, THEN AROUND 30
MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 40 TO 45 MPH UNTIL 0300, THEN NORTHWEST 30
TO 35 MPH.
MIXING HEIGHT.......1000-3000 FT AGL UNTIL 0300, THEN 400-1000 FT
AGL.
SMOKE DISPERSAL.....POOR.
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....33-38.
24 HR TREND......9 DEGREES COOLER.
MIN HUMIDITY........32-38 PERCENT.
24 HR TREND......3 PERCENT DRIER.
20-FOOT WINDS.......WEST WINDS 15 TO 20 MPH WITH GUSTS TO AROUND 35
MPH.
RIDGE TOP WINDS.....WEST 20 TO 25 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 25 TO 30 MPH UNTIL 1600, THEN SOUTHWEST.
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 1700, THEN 800-1200 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FORECAST DAYS 3 THROUGH 7...
THURSDAY NIGHT
NOT AS COLD. WINDY. PARTLY CLOUDY. LOWS AROUND
30. SOUTHWEST WINDS AROUND 30 MPH.
FRIDAY
NOT AS COOL. BREEZY. MOSTLY CLOUDY. CHANCE OF SNOW
SHOWERS AND SHOWERS. LOWS IN THE UPPER 20S. HIGHS IN THE UPPER
40S. SOUTHWEST WINDS AROUND 25 MPH.
SATURDAY
COLDER. PARTLY CLOUDY WITH CHANCE OF SNOW SHOWERS.
LOWS IN THE UPPER 20S. HIGHS IN THE UPPER 30S. WEST WINDS AROUND
15 MPH.
SUNDAY
MOSTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN THE LOWER
40S. SOUTHWEST WINDS AROUND 15 MPH.
MONDAY THROUGH TUESDAY
PARTLY CLOUDY. LOWS IN THE MID 30S.
HIGHS IN THE UPPER 40S.
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