796
FNUS55 KRIW 211034
FWFRIW
FIRE WEATHER PLANNING FORECAST FOR WESTERN AND CENTRAL WYOMING
NATIONAL WEATHER SERVICE RIVERTON WY
434 AM MDT THU MAY 21 2026
DISCUSSION
...YELLOWSTONE NP AND TETON DISPATCH AREAS (INCLUDES FIRE WEATHER
ZONES 140...414...415...AND 416)...
SHOWERS WILL OCCUR ACROSS THE AREA THROUGH THE DAY, ENDING FROM
NORTH TO SOUTH LATE IN THE AFTERNOON TOWARD SUNSET. CHANCES FOR A
WETTING RAIN ARE HIGHEST IN ZONES 414, 415 AND 416. SNOW LEVELS
WILL START AROUND 7000 FT THIS MORNING AND DROP TO AROUND 6000 FT
THROUGH THE DAY.
..CODY DISPATCH AREA (INCLUDES FIRE WEATHER ZONES 275...276
282...283...285...286...287...288...AND 289)...
A COLD FRONT WILL HAVE PASSED THROUGH THE BIGHORN BASIN BY SUNRISE
THIS MORNING AND PROGRESS THROUGH THE WIND RIVER BASIN BETWEEN
0900 AND 1200. SHOWERS WILL OCCUR ACROSS THE AREA THROUGH THE
DAY, ENDING FROM WEST TO EAST LATE IN THE AFTERNOON TOWARD SUNSET.
ALL ZONES HAVE AT LEAST A 50% CHANCE FOR A WETTING RAIN TODAY.
SNOW LEVELS WILL START AROUND 7000 FT THIS MORNING AND DROP TO
AROUND 6000 FT THROUGH THE DAY, WITH LOWER ELEVATION LOCATIONS
STAYING AS RAIN OR A RAIN/SNOW MIX AT TIMES. ZONE 289 WILL HAVE
THE HIGHEST CHANCES FOR A THUNDERSTORM THIS AFTERNOON.
..CASPER DISPATCH AREA (INCLUDES FIRE WEATHER ZONES 277...278
279...280...281...285...289...AND 300)...
A COLD FRONT WILL HAVE PASSED THROUGH ZONES 280 AND 281 BY SUNRISE,
WITH THE SOUTHERN FLANK PASSING THROUGH ZONE 279 THROUGH THE REST
OF THE MORNING. THIS PORTION OF THE FRONT WILL MOVE OVER ZONE 280
AGAIN BETWEEN 1300 AND 1700. SHOWERS WILL OCCUR ACROSS THE AREA
THROUGH THE DAY, ENDING FROM WEST TO EAST LATE IN THE AFTERNOON
TOWARD SUNSET. ZONES 280/281 HAVE THE BEST CHANCE FOR A WETTING
RAIN TODAY. SNOW LEVELS WILL START AROUND 7000 FT THIS MORNING AND
DROP TO AROUND 6000 FT THROUGH THE DAY, WITH LOWER ELEVATION
LOCATIONS STAYING AS RAIN OR A RAIN/SNOW MIX AT TIMES. ZONES 277,
279, 280 AND 289 WILL HAVE THE HIGHEST CHANCES FOR A THUNDERSTORM
THIS AFTERNOON.
..THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS
WYZ280-221245-
NATRONA COUNTY/CASPER BLM-
INCLUDING THE CITIES OF CASPER AND MIDWEST
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SHOWERS IN THE
MORNING. SLIGHT CHANCE OF SNOW SHOWERS THROUGH
THE DAY. SHOWERS LIKELY AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. NO SNOW
ACCUMULATION. CHANCE OF PRECIPITATION 70
PERCENT.
CHANCE OF THUNDER...20 PERCENT.
MAX TEMPERATURE.....47-52.
24 HR TREND......13 DEGREES COOLER.
MIN HUMIDITY........56-62 PERCENT.
24 HR TREND......38 PERCENT WETTER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 0900, THEN WEST
10 TO 15 MPH WITH GUSTS TO AROUND 30 MPH UNTIL
1500, THEN NORTH WITH GUSTS TO AROUND 30 MPH.
RIDGE TOP WINDS.....NORTH AROUND 10 MPH UNTIL 1200, THEN NORTHWEST
AROUND 20 MPH.
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 50 PERCENT.
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH UNTIL 1200, THEN
NORTHWEST AROUND 20 MPH.
MIXING HEIGHT.......2200-4200 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
TONIGHT
SKY/WEATHER.........CLOUDY THEN BECOMING PARTLY CLOUDY. SHOWERS
LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS IN
THE EVENING. CHANCE OF SNOW SHOWERS THROUGH THE
NIGHT. CHANCE OF SHOWERS AFTER MIDNIGHT. NO
SNOW ACCUMULATION. CHANCE OF PRECIPITATION 70
PERCENT.
CHANCE OF THUNDER...10 PERCENT.
MIN TEMPERATURE.....31-36.
24 HR TREND......1 DEGREE COOLER.
MAX HUMIDITY........92-98 PERCENT.
24 HR TREND......10 PERCENT WETTER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTH WINDS 10 TO 15 MPH WITH GUSTS TO AROUND
30 MPH UNTIL 0300, THEN WEST AND GUSTY.
RIDGE TOP WINDS.....NORTH AROUND 20 MPH UNTIL 2400, THEN WEST.
CHC OF WETTING RAIN.45 PERCENT UNTIL 2400, THEN 10 PERCENT.
TRANSPORT WINDS.....NORTHWEST 15 TO 20 MPH.
MIXING HEIGHT.......600-2200 FT AGL.
SMOKE DISPERSAL.....POOR.
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN THE
MORNING. CHANCE OF SHOWERS 20 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....55-60.
24 HR TREND......9 DEGREES WARMER.
MIN HUMIDITY........29-35 PERCENT.
24 HR TREND......29 PERCENT DRIER.
20-FOOT WINDS.......WEST WINDS AROUND 10 MPH WITH HIGHER GUSTS.
RIDGE TOP WINDS.....WEST AROUND 15 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST AROUND 15 MPH.
MIXING HEIGHT.......1800-3800 FT AGL UNTIL 1200, THEN 5800-7800 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 1200, THEN GOOD TO VERY
GOOD.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 30S. WINDS
GENERALLY LESS THAN 10 MPH.
SATURDAY
WARMER. MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN
THE UPPER 60S. SOUTHWEST WINDS AROUND 10 MPH.
SUNDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE UPPER 70S.
SOUTHWEST WINDS AROUND 10 MPH.
MEMORIAL DAY
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE
LOWER 80S. SOUTHWEST WINDS AROUND 10 MPH.
TUESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE UPPER 70S.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE MID 70S.
WYZ283-221245-
UPPER WIND RIVER BASIN/WIND RIVER BASIN-
INCLUDING THE CITIES OF CROWHEART, LANDER, RIVERTON, AND SHOSHONI
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SHOWERS IN THE
MORNING. SNOW SHOWERS LIKELY AND SLIGHT CHANCE
OF THUNDERSTORMS THROUGH THE DAY. SHOWERS
LIKELY IN THE AFTERNOON. NO SNOW ACCUMULATION.
CHANCE OF PRECIPITATION 70 PERCENT.
CHANCE OF THUNDER...20 PERCENT.
MAX TEMPERATURE.....43-48.
24 HR TREND......15 DEGREES COOLER.
MIN HUMIDITY........56-62 PERCENT.
24 HR TREND......38 PERCENT WETTER.
20-FOOT WINDS.......EAST WINDS AROUND 10 MPH WITH GUSTS TO AROUND
25 MPH UNTIL 0900, THEN NORTH 15 TO 20 MPH WITH
GUSTS TO AROUND 40 MPH.
RIDGE TOP WINDS.....NORTHEAST AROUND 15 MPH UNTIL 1200, THEN NORTH
AROUND 25 MPH.
CHC OF WETTING RAIN.20 PERCENT UNTIL 1200, THEN 30 PERCENT.
TRANSPORT WINDS.....NORTH AROUND 15 MPH UNTIL 1200, THEN AROUND 25
MPH.
MIXING HEIGHT.......1400-3400 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
CHANCE OF SHOWERS AND SNOW SHOWERS IN THE
EVENING. SLIGHT CHANCE OF SHOWERS AFTER
MIDNIGHT. CHANCE OF PRECIPITATION 50 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....29-34.
24 HR TREND......5 DEGREES COOLER.
MAX HUMIDITY........84-90 PERCENT.
24 HR TREND......6 PERCENT WETTER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTH WINDS AROUND 15 MPH WITH GUSTS TO AROUND
35 MPH UNTIL 2100, THEN DOWNSLOPE/DOWNVALLEY
4-7 MPH.
RIDGE TOP WINDS.....NORTH AROUND 15 MPH UNTIL 2400, THEN WEST.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 2400, THEN 400-1200 FT
AGL.
SMOKE DISPERSAL.....POOR.
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....56-61.
24 HR TREND......13 DEGREES WARMER.
MIN HUMIDITY........28-34 PERCENT.
24 HR TREND......29 PERCENT DRIER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 1500, THEN SOUTH
AROUND 10 MPH. GUSTS UP TO 15 MPH.
RIDGE TOP WINDS.....SOUTHWEST AROUND 10 MPH UNTIL 1200, THEN SOUTH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 10 TO 15 MPH.
MIXING HEIGHT.......1400-3400 FT AGL UNTIL 1200, THEN 5400-7400 FT
AGL.
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN GOOD.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 30S. WINDS
GENERALLY LESS THAN 10 MPH.
SATURDAY
WARMER. MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS
AROUND 70. SOUTHWEST WINDS AROUND 10 MPH.
SUNDAY THROUGH MEMORIAL DAY
MOSTLY CLEAR. LOWS IN THE UPPER
40S. HIGHS 76 TO 81. SOUTHWEST WINDS AROUND 10 MPH.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS 74 TO 79.
WYZ285-221245-
SOUTH BIGHORN MOUNTAINS-
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........MOSTLY CLOUDY. SNOW SHOWERS, SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS THROUGH THE DAY. SNOW
ACCUMULATION UP TO 2 INCHES. CHANCE OF
PRECIPITATION NEAR 100 PERCENT.
CHANCE OF THUNDER...20 PERCENT.
MAX TEMPERATURE.....40-45.
24 HR TREND......15 DEGREES COOLER.
MIN HUMIDITY........61-67 PERCENT.
24 HR TREND......45 PERCENT WETTER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 0900, THEN EAST
AROUND 10 MPH WITH HIGHER GUSTS UNTIL 1200,
THEN NORTH WITH GUSTS TO AROUND 30 MPH.
RIDGE TOP WINDS.....EAST AROUND 10 MPH UNTIL 1200, THEN NORTH.
CHC OF WETTING RAIN.30 PERCENT UNTIL 1200, THEN 80 PERCENT.
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH UNTIL 1200, THEN NORTH.
MIXING HEIGHT.......600-2600 FT AGL.
SMOKE DISPERSAL.....POOR.
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. SNOW
SHOWERS AND SHOWERS IN THE EVENING, THEN CHANCE
OF SNOW SHOWERS AND SLIGHT CHANCE OF SHOWERS
AFTER MIDNIGHT. SNOW ACCUMULATION UP TO 1 INCH.
CHANCE OF PRECIPITATION 90 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....28-33.
24 HR TREND......5 DEGREES COOLER.
MAX HUMIDITY........87-93 PERCENT.
24 HR TREND......11 PERCENT WETTER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO
AROUND 25 MPH.
RIDGE TOP WINDS.....NORTHWEST AROUND 15 MPH.
CHC OF WETTING RAIN.35 PERCENT UNTIL 2400, THEN 5 PERCENT.
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH.
MIXING HEIGHT.......600-2000 FT AGL.
SMOKE DISPERSAL.....POOR.
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....51-56.
24 HR TREND......10 DEGREES WARMER.
MIN HUMIDITY........32-38 PERCENT.
24 HR TREND......33 PERCENT DRIER.
20-FOOT WINDS.......WEST WINDS AROUND 10 MPH WITH GUSTS TO AROUND
25 MPH.
RIDGE TOP WINDS.....WEST AROUND 15 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH.
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 1200, THEN 3800-5800 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 30S. WINDS
GENERALLY LESS THAN 10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE LOWER
60S. WEST WINDS AROUND 10 MPH.
SUNDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 40S. HIGHS AROUND 70. SOUTHWEST
WINDS AROUND 10 MPH.
MEMORIAL DAY
MOSTLY CLEAR. LOWS IN THE LOWER 50S. HIGHS IN THE
MID 70S. SOUTHWEST WINDS AROUND 15 MPH.
TUESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS IN THE UPPER 40S. HIGHS IN THE LOWER 70S.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN THE
MORNING, THEN SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON. HIGHS IN THE UPPER 60S.
WYZ281-221245-
JOHNSON COUNTY/CASPER BLM-
INCLUDING THE CITIES OF BUFFALO AND KAYCEE
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SHOWERS IN THE
MORNING. SLIGHT CHANCE OF THUNDERSTORMS THROUGH
THE DAY. SHOWERS LIKELY IN THE AFTERNOON.
CHANCE OF PRECIPITATION 70 PERCENT.
CHANCE OF THUNDER...20 PERCENT.
MAX TEMPERATURE.....43-48.
24 HR TREND......19 DEGREES COOLER.
MIN HUMIDITY........62-68 PERCENT.
24 HR TREND......48 PERCENT WETTER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 0900. WINDS
NORTH AROUND 20 MPH WITH GUSTS TO AROUND 35 MPH
AFTER 1500.
RIDGE TOP WINDS.....NORTH AROUND 15 MPH UNTIL 1200, THEN AROUND 25
MPH.
CHC OF WETTING RAIN.5 PERCENT UNTIL 1200, THEN 55 PERCENT.
TRANSPORT WINDS.....NORTH AROUND 15 MPH UNTIL 1200, THEN AROUND 25
MPH.
MIXING HEIGHT.......1400-3400 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
TONIGHT
SKY/WEATHER.........CLOUDY THEN BECOMING PARTLY CLOUDY. SHOWERS
LIKELY IN THE EVENING, THEN CHANCE OF SHOWERS
LATE IN THE EVENING. SLIGHT CHANCE OF SHOWERS
EARLY IN THE MORNING. CHANCE OF SHOWERS 70
PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....32-37.
24 HR TREND......2 DEGREES COOLER.
MAX HUMIDITY........86-92 PERCENT.
24 HR TREND......3 PERCENT WETTER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTH WINDS AROUND 20 MPH WITH GUSTS TO AROUND
35 MPH UNTIL 2100, THEN NORTHWEST AROUND 10 MPH
WITH GUSTS TO AROUND 35 MPH UNTIL 0300, THEN
DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....NORTH AROUND 20 MPH UNTIL 2400, THEN NORTHWEST
AROUND 10 MPH.
CHC OF WETTING RAIN.20 PERCENT UNTIL 2400, THEN 10 PERCENT.
TRANSPORT WINDS.....NORTHWEST 15 TO 20 MPH.
MIXING HEIGHT.......600-2400 FT AGL.
SMOKE DISPERSAL.....POOR.
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....57-62.
24 HR TREND......14 DEGREES WARMER.
MIN HUMIDITY........32-38 PERCENT.
24 HR TREND......37 PERCENT DRIER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 1200, THEN
NORTHWEST AROUND 10 MPH. GUSTS UP TO 20 MPH.
RIDGE TOP WINDS.....NORTHWEST 10 TO 15 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH.
MIXING HEIGHT.......2200-4200 FT AGL UNTIL 1200, THEN 6000-7600 FT
AGL.
SMOKE DISPERSAL.....FAIR TO GOOD.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 30S. WINDS
GENERALLY LESS THAN 10 MPH.
SATURDAY
WARMER. MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN
THE LOWER 70S. WINDS GENERALLY LESS THAN 10 MPH.
SUNDAY THROUGH MEMORIAL DAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS
81 TO 86. SOUTHWEST WINDS AROUND 10 MPH.
TUESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS IN THE UPPER 40S. HIGHS IN THE LOWER 80S.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE UPPER 70S.
WYZ282-221245-
SOUTH BIGHORN BASIN/WORLAND BLM-
INCLUDING THE CITIES OF TEN SLEEP, THERMOPOLIS, AND WORLAND
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........CLOUDY. SNOW SHOWERS IN THE MORNING. SHOWERS
LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS
THROUGH THE DAY. SLIGHT CHANCE OF SNOW SHOWERS
IN THE AFTERNOON. NO SNOW ACCUMULATION. CHANCE
OF PRECIPITATION NEAR 100 PERCENT.
CHANCE OF THUNDER...20 PERCENT.
MAX TEMPERATURE.....41-46.
24 HR TREND......18 DEGREES COOLER.
MIN HUMIDITY........58-64 PERCENT.
24 HR TREND......45 PERCENT WETTER.
20-FOOT WINDS.......NORTHWEST WINDS AROUND 10 MPH UNTIL 1200, THEN
AROUND 20 MPH. GUSTS UP TO 35 MPH.
RIDGE TOP WINDS.....NORTHWEST AROUND 15 MPH UNTIL 1200, THEN AROUND
25 MPH.
CHC OF WETTING RAIN.47 PERCENT.
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH UNTIL 1200, THEN AROUND
25 MPH.
MIXING HEIGHT.......1400-3400 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF SHOWERS EARLY IN THE
EVENING. SLIGHT CHANCE OF SHOWERS EARLY IN THE
EVENING. CHANCE OF SHOWERS 50 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....28-33.
24 HR TREND......3 DEGREES COOLER.
MAX HUMIDITY........83-89 PERCENT.
24 HR TREND......2 PERCENT DRIER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO
AROUND 30 MPH UNTIL 2400, THEN
DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....WEST 10 TO 15 MPH.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
TRANSPORT WINDS.....NORTHWEST AROUND 20 MPH UNTIL 2400, THEN AROUND
10 MPH.
MIXING HEIGHT.......1400-3400 FT AGL UNTIL 2400, THEN 400-800 FT
AGL.
SMOKE DISPERSAL.....POOR.
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....53-58.
24 HR TREND......14 DEGREES WARMER.
MIN HUMIDITY........27-33 PERCENT.
24 HR TREND......34 PERCENT DRIER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. GUSTS UP TO 15 MPH.
RIDGE TOP WINDS.....WEST AROUND 10 MPH UNTIL 1200, THEN NORTH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH.
MIXING HEIGHT.......1600-3600 FT AGL UNTIL 1200, THEN 5000-6800 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 30S. WINDS
GENERALLY LESS THAN 10 MPH.
SATURDAY
WARMER. MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN
THE LOWER 70S. WINDS GENERALLY LESS THAN 10 MPH.
SUNDAY THROUGH MEMORIAL DAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS 48 TO 53. HIGHS 80 TO 85. SOUTH
WINDS AROUND 10 MPH.
TUESDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. LOWS AROUND 50. HIGHS IN THE LOWER 80S.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN THE
MORNING, THEN SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON. HIGHS IN THE UPPER 70S.
WYZ275-221245-
NORTH BIGHORN BASIN/WORLAND BLM-
INCLUDING THE CITIES OF GREYBULL, LOVELL, AND POWELL
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS AND SNOW SHOWERS IN THE
MORNING. SLIGHT CHANCE OF THUNDERSTORMS THROUGH
THE DAY. SHOWERS LIKELY AND SLIGHT CHANCE OF
SNOW SHOWERS IN THE AFTERNOON. NO SNOW
ACCUMULATION. CHANCE OF PRECIPITATION NEAR 100
PERCENT.
CHANCE OF THUNDER...10 PERCENT.
MAX TEMPERATURE.....41-46.
24 HR TREND......17 DEGREES COOLER.
MIN HUMIDITY........55-61 PERCENT.
24 HR TREND......39 PERCENT WETTER.
20-FOOT WINDS.......BREEZY. NORTHWEST WINDS 15 TO 20 MPH UNTIL
1200, THEN NORTH 20 TO 25 MPH. GUSTS UP TO 35
MPH.
RIDGE TOP WINDS.....NORTH 20 TO 25 MPH.
CHC OF WETTING RAIN.75 PERCENT UNTIL 1200, THEN 25 PERCENT.
TRANSPORT WINDS.....NORTH AROUND 25 MPH.
MIXING HEIGHT.......1600-3600 FT AGL.
SMOKE DISPERSAL.....FAIR TO GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF SHOWERS EARLY IN THE
EVENING. CHANCE OF SHOWERS 50 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....27-32.
24 HR TREND......3 DEGREES COOLER.
MAX HUMIDITY........81-87 PERCENT.
24 HR TREND......9 PERCENT DRIER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO
AROUND 30 MPH UNTIL 2400, THEN
DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....NORTHWEST 10 TO 15 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTH AROUND 20 MPH UNTIL 2400, THEN NORTHWEST
AROUND 10 MPH.
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 2400, THEN 400-600 FT
AGL.
SMOKE DISPERSAL.....POOR.
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....52-57.
24 HR TREND......13 DEGREES WARMER.
MIN HUMIDITY........30-36 PERCENT.
24 HR TREND......29 PERCENT DRIER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. GUSTS UP TO 15 MPH.
RIDGE TOP WINDS.....SOUTH AROUND 10 MPH UNTIL 1200, THEN NORTHEAST.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH.
MIXING HEIGHT.......1400-3400 FT AGL UNTIL 1200, THEN 4800-6800 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
NOT AS COOL. PARTLY CLOUDY. LOWS AROUND 40. WINDS
GENERALLY LESS THAN 10 MPH.
SATURDAY
WARMER. MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN
THE LOWER 70S. WINDS GENERALLY LESS THAN 10 MPH.
SUNDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS. LOWS AROUND 50.
HIGHS IN THE LOWER 80S. SOUTH WINDS AROUND 10 MPH.
MEMORIAL DAY
MOSTLY CLEAR. LOWS IN THE LOWER 50S. HIGHS IN THE
MID 80S. SOUTH WINDS AROUND 10 MPH.
TUESDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS IN THE LOWER 80S.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN THE
MORNING, THEN SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON. HIGHS IN THE UPPER 70S.
WYZ276-221245-
CODY FOOTHILLS-
INCLUDING THE CITIES OF CLARK, CODY, AND MEETEETSE
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS, SNOW SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS THROUGH THE DAY. SNOW
ACCUMULATION UP TO 2 INCHES. CHANCE OF
PRECIPITATION NEAR 100 PERCENT.
CHANCE OF THUNDER...20 PERCENT.
MAX TEMPERATURE.....42-47.
24 HR TREND......16 DEGREES COOLER.
MIN HUMIDITY........56-62 PERCENT.
24 HR TREND......41 PERCENT WETTER.
20-FOOT WINDS.......BREEZY. NORTH WINDS 15 TO 20 MPH UNTIL 1200,
THEN 20 TO 25 MPH. GUSTS UP TO 40 MPH.
RIDGE TOP WINDS.....NORTH AROUND 25 MPH.
CHC OF WETTING RAIN.85 PERCENT UNTIL 1200, THEN 10 PERCENT.
TRANSPORT WINDS.....NORTH AROUND 25 MPH.
MIXING HEIGHT.......1400-3400 FT AGL.
SMOKE DISPERSAL.....FAIR TO GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
SNOW SHOWERS EARLY IN THE EVENING. CHANCE OF
PRECIPITATION 20 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....28-33.
24 HR TREND......3 DEGREES COOLER.
MAX HUMIDITY........74-80 PERCENT.
24 HR TREND......17 PERCENT DRIER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTH WINDS AROUND 15 MPH WITH GUSTS TO AROUND
25 MPH UNTIL 2100, THEN DOWNSLOPE/DOWNVALLEY
4-7 MPH.
RIDGE TOP WINDS.....NORTHWEST AROUND 15 MPH UNTIL 2400, THEN WEST.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.
MIXING HEIGHT.......1000-3000 FT AGL UNTIL 2400, THEN 400-600 FT
AGL.
SMOKE DISPERSAL.....POOR.
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....55-60.
24 HR TREND......15 DEGREES WARMER.
MIN HUMIDITY........35-41 PERCENT.
24 HR TREND......29 PERCENT DRIER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 1200, THEN EAST
AROUND 10 MPH. GUSTS UP TO 15 MPH.
RIDGE TOP WINDS.....SOUTHWEST AROUND 10 MPH UNTIL 1200, THEN EAST.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.
MIXING HEIGHT.......1400-3400 FT AGL UNTIL 1200, THEN 5000-7000 FT
AGL.
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN GOOD.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 40. WINDS GENERALLY
LESS THAN 10 MPH.
SATURDAY
WARMER. MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN
THE UPPER 60S. SOUTHWEST WINDS AROUND 10 MPH.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS IN
THE LOWER 50S. HIGHS IN THE UPPER 70S. WEST WINDS AROUND 15 MPH.
MEMORIAL DAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS IN THE UPPER 70S.
SOUTHWEST WINDS AROUND 10 MPH.
TUESDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. LOWS AROUND 50. HIGHS IN THE MID 70S.
WEDNESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS IN THE MORNING,
THEN CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. HIGHS
IN THE LOWER 70S.
WYZ287-221245-
OWL CREEK MOUNTAINS-
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........CLOUDY. SNOW SHOWERS, SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. SNOW ACCUMULATION UP TO 2
INCHES. CHANCE OF PRECIPITATION NEAR 100
PERCENT.
CHANCE OF THUNDER...20 PERCENT.
MAX TEMPERATURE.....38-43.
24 HR TREND......18 DEGREES COOLER.
MIN HUMIDITY........64-70 PERCENT.
24 HR TREND......44 PERCENT WETTER.
20-FOOT WINDS.......BREEZY. UPSLOPE/UPVALLEY 5-9 MPH UNTIL 0900.
WINDS NORTH AROUND 25 MPH WITH GUSTS TO AROUND
45 MPH AFTER 1200.
RIDGE TOP WINDS.....NORTH AROUND 15 MPH UNTIL 1200, THEN AROUND 30
MPH.
CHC OF WETTING RAIN.70 PERCENT UNTIL 1200, THEN 35 PERCENT.
TRANSPORT WINDS.....NORTH AROUND 20 MPH UNTIL 1200, THEN AROUND 30
MPH.
MIXING HEIGHT.......1000-3000 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF SHOWERS AND SNOW
SHOWERS EARLY IN THE EVENING, THEN SLIGHT
CHANCE OF SHOWERS EARLY IN THE EVENING. SLIGHT
CHANCE OF SNOW SHOWERS EARLY IN THE EVENING.
CHANCE OF PRECIPITATION 50 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....28-33.
24 HR TREND......4 DEGREES COOLER.
MAX HUMIDITY........84-90 PERCENT.
24 HR TREND......9 PERCENT DRIER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTH WINDS 15 TO 20 MPH WITH GUSTS TO AROUND
40 MPH UNTIL 2400. DOWNSLOPE/DOWNVALLEY 4-7 MPH
AFTER 0300.
RIDGE TOP WINDS.....NORTH AROUND 20 MPH UNTIL 2400, THEN NORTHWEST
AROUND 10 MPH.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
TRANSPORT WINDS.....NORTH AROUND 25 MPH UNTIL 2400, THEN NORTHWEST
AROUND 15 MPH.
MIXING HEIGHT.......1000-3000 FT AGL UNTIL 2400, THEN 600-800 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....50-55.
24 HR TREND......16 DEGREES WARMER.
MIN HUMIDITY........31-37 PERCENT.
24 HR TREND......34 PERCENT DRIER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 1500, THEN EAST
AROUND 10 MPH. GUSTS UP TO 15 MPH.
RIDGE TOP WINDS.....SOUTHWEST AROUND 10 MPH UNTIL 1200, THEN
SOUTHEAST.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH.
MIXING HEIGHT.......1400-3400 FT AGL UNTIL 1200, THEN 5000-7000 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 30S. WINDS
GENERALLY LESS THAN 10 MPH.
SATURDAY
WARMER. MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN
THE MID 60S. WEST WINDS AROUND 10 MPH.
SUNDAY
MOSTLY CLEAR. LOWS AROUND 50. HIGHS IN THE LOWER 70S.
WEST WINDS AROUND 10 MPH.
MEMORIAL DAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS AROUND 50. HIGHS IN THE MID 70S. SOUTHWEST
WINDS AROUND 15 MPH.
TUESDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. LOWS IN THE UPPER 40S. HIGHS IN THE LOWER 70S.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN THE
MORNING, THEN SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON. HIGHS AROUND 70.
WYZ286-221245-
ABSAROKA MOUNTAINS/NORTH SHOSHONE NF-
INCLUDING THE CITY OF PAHASKA
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........MOSTLY CLOUDY. SNOW SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS THROUGH THE DAY. SLIGHT CHANCE
OF SHOWERS IN THE AFTERNOON. SNOW ACCUMULATION
UP TO 4 INCHES. CHANCE OF PRECIPITATION NEAR
100 PERCENT.
CHANCE OF THUNDER...20 PERCENT.
MAX TEMPERATURE.....37-42.
24 HR TREND......11 DEGREES COOLER.
MIN HUMIDITY........61-67 PERCENT.
24 HR TREND......31 PERCENT WETTER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 0900, THEN
NORTHEAST 10 TO 15 MPH. GUSTS UP TO 35 MPH.
RIDGE TOP WINDS.....NORTH 15 TO 20 MPH.
CHC OF WETTING RAIN.85 PERCENT UNTIL 1200, THEN 20 PERCENT.
TRANSPORT WINDS.....NORTH 15 TO 20 MPH.
MIXING HEIGHT.......1000-3000 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF SNOW SHOWERS EARLY IN
THE EVENING, THEN SLIGHT CHANCE OF SNOW SHOWERS
EARLY IN THE EVENING. CHANCE OF SNOW 50
PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....22-27.
24 HR TREND......7 DEGREES COOLER.
MAX HUMIDITY........81-87 PERCENT.
24 HR TREND......9 PERCENT DRIER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTH WINDS AROUND 10 MPH WITH GUSTS TO AROUND
25 MPH UNTIL 2100, THEN DOWNSLOPE/DOWNVALLEY
4-7 MPH.
RIDGE TOP WINDS.....NORTHWEST AROUND 10 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH.
MIXING HEIGHT.......800-2800 FT AGL UNTIL 2400, THEN 600 FT AGL.
SMOKE DISPERSAL.....POOR.
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....46-51.
24 HR TREND......10 DEGREES WARMER.
MIN HUMIDITY........42-48 PERCENT.
24 HR TREND......23 PERCENT DRIER.
20-FOOT WINDS.......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.
TRANSPORT WINDS.....WEST 10 TO 15 MPH.
MIXING HEIGHT.......1600-3600 FT AGL UNTIL 1200, THEN 5400-7400 FT
AGL.
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN GOOD.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 30. WINDS GENERALLY
LESS THAN 10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE MID
50S. WEST WINDS AROUND 10 MPH.
SUNDAY THROUGH MEMORIAL DAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS 60 TO 65.
SOUTHWEST WINDS 10 TO 15 MPH.
TUESDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS, SNOW SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS. LOWS AROUND 40. HIGHS IN THE
LOWER 60S.
WEDNESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE
OF SNOW SHOWERS IN THE MORNING, THEN CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE UPPER 50S.
WYZ140-221245-
YELLOWSTONE NATIONAL PARK-
INCLUDING THE CITIES OF LAKE, MAMMOTH, AND OLD FAITHFUL
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........MOSTLY CLOUDY. SNOW SHOWERS IN THE MORNING.
SLIGHT CHANCE OF THUNDERSTORMS THROUGH THE DAY.
CHANCE OF SNOW SHOWERS AND SHOWERS IN THE
AFTERNOON. SNOW ACCUMULATION UP TO 2 INCHES.
CHANCE OF PRECIPITATION NEAR 100 PERCENT.
CHANCE OF THUNDER...20 PERCENT.
MAX TEMPERATURE.....41-46.
24 HR TREND......7 DEGREES COOLER.
MIN HUMIDITY........53-59 PERCENT.
24 HR TREND......18 PERCENT WETTER.
20-FOOT WINDS.......NORTH WINDS 10 TO 15 MPH WITH GUSTS TO AROUND
25 MPH.
RIDGE TOP WINDS.....NORTH 15 TO 20 MPH.
CHC OF WETTING RAIN.45 PERCENT UNTIL 1200, THEN 5 PERCENT.
TRANSPORT WINDS.....NORTH 15 TO 20 MPH.
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 1200, THEN 3400-4800 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF SNOW SHOWERS EARLY IN
THE EVENING. SLIGHT CHANCE OF SNOW SHOWERS
EARLY IN THE EVENING. CHANCE OF SNOW 50
PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....20-25.
24 HR TREND......6 DEGREES COOLER.
MAX HUMIDITY........85-91 PERCENT.
24 HR TREND......9 PERCENT DRIER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTH WINDS AROUND 10 MPH AND GUSTY UNTIL 2100,
THEN DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....NORTH AROUND 15 MPH UNTIL 2400, THEN AROUND 5
MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTH AROUND 15 MPH UNTIL 2400, THEN NORTHEAST
AROUND 5 MPH.
MIXING HEIGHT.......1400-3400 FT AGL UNTIL 2400, THEN 400-600 FT
AGL.
SMOKE DISPERSAL.....POOR.
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....51-56.
24 HR TREND......10 DEGREES WARMER.
MIN HUMIDITY........34-40 PERCENT.
24 HR TREND......19 PERCENT DRIER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. GUSTS UP TO 15 MPH.
RIDGE TOP WINDS.....SOUTHWEST AROUND 10 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 10 TO 15 MPH.
MIXING HEIGHT.......1600-3600 FT AGL UNTIL 1200, THEN 6000-8000 FT
AGL.
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN GOOD.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 20S. WINDS
GENERALLY LESS THAN 10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE UPPER
50S. WINDS GENERALLY LESS THAN 10 MPH.
SUNDAY THROUGH MEMORIAL DAY
PARTLY CLOUDY WITH SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS 63 TO
68. SOUTH WINDS AROUND 10 MPH.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY WITH CHANCE OF
SHOWERS, THUNDERSTORMS AND SLIGHT CHANCE OF SNOW SHOWERS. LOWS IN
THE MID 30S. HIGHS IN THE LOWER 60S.
WYZ415-221245-
NORTH ZONE BRIDGER TETON NF AND GRAND TETON NP-
INCLUDING THE CITIES OF JACKSON AND MORAN
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS LIKELY AND SLIGHT CHANCE
OF THUNDERSTORMS IN THE MORNING. SNOW SHOWERS
THROUGH THE DAY. SHOWERS AND CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. SNOW
ACCUMULATION UP TO 3 INCHES. CHANCE OF
PRECIPITATION NEAR 100 PERCENT.
CHANCE OF THUNDER...30 PERCENT.
MAX TEMPERATURE.....39-44.
24 HR TREND......8 DEGREES COOLER.
MIN HUMIDITY........58-64 PERCENT.
24 HR TREND......25 PERCENT WETTER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 0900, THEN NORTH
AROUND 10 MPH. GUSTS UP TO 25 MPH.
RIDGE TOP WINDS.....NORTHWEST AROUND 10 MPH UNTIL 1200, THEN NORTH.
CHC OF WETTING RAIN.60 PERCENT UNTIL 1200, THEN 20 PERCENT.
TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
MIXING HEIGHT.......1000-3000 FT AGL UNTIL 1200, THEN 3200-4000 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF SNOW SHOWERS, SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS IN THE
EVENING. CHANCE OF PRECIPITATION 50 PERCENT.
CHANCE OF THUNDER...10 PERCENT.
MIN TEMPERATURE.....20-25.
24 HR TREND......7 DEGREES COOLER.
MAX HUMIDITY........84-90 PERCENT.
24 HR TREND......6 PERCENT DRIER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTH WINDS AROUND 10 MPH AND GUSTY UNTIL 2100,
THEN DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....NORTH AROUND 10 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 2400, THEN 400-600 FT
AGL.
SMOKE DISPERSAL.....POOR.
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....50-55.
24 HR TREND......9 DEGREES WARMER.
MIN HUMIDITY........40-46 PERCENT.
24 HR TREND......23 PERCENT DRIER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. GUSTS UP TO 15 MPH.
RIDGE TOP WINDS.....SOUTH AROUND 10 MPH UNTIL 1200, THEN WEST.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....SOUTH AROUND 10 MPH UNTIL 1200, THEN WEST.
MIXING HEIGHT.......1400-3400 FT AGL UNTIL 1200, THEN 5400-7400 FT
AGL.
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN FAIR TO GOOD.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS AROUND 30. WINDS GENERALLY
LESS THAN 10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE UPPER
50S. WINDS GENERALLY LESS THAN 10 MPH.
SUNDAY THROUGH MEMORIAL DAY
PARTLY CLOUDY WITH SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS 63 TO
68. SOUTH WINDS AROUND 10 MPH.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY WITH CHANCE OF
SHOWERS, THUNDERSTORMS AND SLIGHT CHANCE OF SNOW SHOWERS. LOWS IN
THE UPPER 30S. HIGHS IN THE LOWER 60S.
WYZ416-221245-
WEST WIND RIVER MOUNTAINS/EAST ZONE BRIDGER TETON NF-
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS
IN THE MORNING. SNOW SHOWERS AND SLIGHT CHANCE
OF SHOWERS THROUGH THE DAY. CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. SNOW
ACCUMULATION UP TO 4 INCHES. CHANCE OF
PRECIPITATION NEAR 100 PERCENT.
CHANCE OF THUNDER...30 PERCENT.
MAX TEMPERATURE.....36-41.
24 HR TREND......8 DEGREES COOLER.
MIN HUMIDITY........58-64 PERCENT.
24 HR TREND......25 PERCENT WETTER.
20-FOOT WINDS.......SOUTHWEST WINDS AROUND 10 MPH UNTIL 1200, THEN
NORTHWEST. GUSTS UP TO 25 MPH.
RIDGE TOP WINDS.....SOUTHWEST AROUND 15 MPH UNTIL 1200, THEN
NORTHWEST.
CHC OF WETTING RAIN.67 PERCENT.
TRANSPORT WINDS.....WEST AROUND 15 MPH UNTIL 1200, THEN NORTH.
MIXING HEIGHT.......1600-3600 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF SNOW SHOWERS EARLY IN
THE EVENING. SLIGHT CHANCE OF THUNDERSTORMS
EARLY IN THE EVENING. SLIGHT CHANCE OF SNOW
SHOWERS EARLY IN THE EVENING. CHANCE OF
PRECIPITATION 50 PERCENT.
CHANCE OF THUNDER...10 PERCENT.
MIN TEMPERATURE.....19-24.
24 HR TREND......7 DEGREES COOLER.
MAX HUMIDITY........84-90 PERCENT.
24 HR TREND......7 PERCENT DRIER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTHEAST WINDS AROUND 10 MPH WITH GUSTS TO
AROUND 30 MPH UNTIL 2100, THEN
DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....NORTHEAST 10 TO 15 MPH.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.
MIXING HEIGHT.......800-2800 FT AGL UNTIL 2400, THEN 600 FT AGL.
SMOKE DISPERSAL.....POOR.
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....44-49.
24 HR TREND......8 DEGREES WARMER.
MIN HUMIDITY........42-48 PERCENT.
24 HR TREND......21 PERCENT DRIER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....SOUTHWEST AROUND 10 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 10 TO 15 MPH.
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 1200, THEN 4400-6400 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 20S. WINDS
GENERALLY LESS THAN 10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS IN THE LOWER 30S. HIGHS IN THE MID
50S. WINDS GENERALLY LESS THAN 10 MPH.
SUNDAY THROUGH MEMORIAL DAY
PARTLY CLOUDY WITH SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS. LOWS 35 TO 40. HIGHS 58 TO 63.
SOUTH WINDS AROUND 10 MPH.
TUESDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS, THUNDERSTORMS
AND SLIGHT CHANCE OF SNOW SHOWERS. LOWS IN THE MID 30S. HIGHS IN
THE UPPER 50S.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND SNOW
SHOWERS IN THE MORNING, THEN SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE UPPER 50S.
WYZ288-221245-
EAST WIND RIVER MOUNTAINS/SOUTH SHOSHONE NF-
INCLUDING THE CITIES OF DUBOIS AND SOUTH PASS
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........MOSTLY CLOUDY. SHOWERS LIKELY AND SLIGHT CHANCE
OF THUNDERSTORMS IN THE MORNING. SNOW SHOWERS
THROUGH THE DAY. CHANCE OF THUNDERSTORMS AND
SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON. SNOW
ACCUMULATION UP TO 5 INCHES. CHANCE OF
PRECIPITATION NEAR 100 PERCENT.
CHANCE OF THUNDER...30 PERCENT.
MAX TEMPERATURE.....37-42.
24 HR TREND......10 DEGREES COOLER.
MIN HUMIDITY........58-64 PERCENT.
24 HR TREND......32 PERCENT WETTER.
20-FOOT WINDS.......WEST WINDS 10 TO 15 MPH UNTIL 1200, THEN NORTH.
GUSTS UP TO 30 MPH.
RIDGE TOP WINDS.....WEST AROUND 15 MPH UNTIL 1200, THEN NORTH.
CHC OF WETTING RAIN.60 PERCENT UNTIL 1200, THEN 75 PERCENT.
TRANSPORT WINDS.....WEST AROUND 20 MPH UNTIL 1200, THEN NORTH.
MIXING HEIGHT.......1200-3200 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. SNOW SHOWERS, SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING.
SLIGHT CHANCE OF SNOW SHOWERS AFTER MIDNIGHT.
SNOW ACCUMULATION UP TO 1 INCH. CHANCE OF
PRECIPITATION NEAR 100 PERCENT.
CHANCE OF THUNDER...10 PERCENT.
MIN TEMPERATURE.....20-25.
24 HR TREND......8 DEGREES COOLER.
MAX HUMIDITY........86-92 PERCENT.
24 HR TREND......1 PERCENT WETTER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTH WINDS 10 TO 15 MPH WITH GUSTS TO AROUND
30 MPH UNTIL 2400, THEN DOWNSLOPE/DOWNVALLEY
4-7 MPH.
RIDGE TOP WINDS.....NORTH AROUND 15 MPH UNTIL 2400, THEN WEST.
CHC OF WETTING RAIN.10 PERCENT UNTIL 2400, THEN ZERO PERCENT.
TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
MIXING HEIGHT.......600-2400 FT AGL.
SMOKE DISPERSAL.....POOR.
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....43-48.
24 HR TREND......9 DEGREES WARMER.
MIN HUMIDITY........43-49 PERCENT.
24 HR TREND......22 PERCENT DRIER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 1200, THEN
SOUTHWEST AROUND 10 MPH. GUSTS UP TO 15 MPH.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 10 TO 15 MPH.
MIXING HEIGHT.......1400-3400 FT AGL UNTIL 1200, THEN 4400-6400 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 30S. WINDS
GENERALLY LESS THAN 10 MPH.
SATURDAY
WARMER. MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN
THE UPPER 50S. WEST WINDS AROUND 10 MPH.
SUNDAY THROUGH MEMORIAL DAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS 40 TO 45. HIGHS 62 TO 67.
SOUTHWEST WINDS 10 TO 15 MPH.
TUESDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 60S.
WEDNESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND SNOW SHOWERS IN
THE MORNING, THEN CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE LOWER 60S.
WYZ414-221245-
SALT AND WYOMING RANGES/WEST ZONE BRIDGER TETON NF-
INCLUDING THE CITY OF AFTON
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........MOSTLY CLOUDY. SNOW SHOWERS LIKELY AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE MORNING. SHOWERS
THROUGH THE DAY. SNOW SHOWERS AND CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. SNOW
ACCUMULATION UP TO 2 INCHES. CHANCE OF
PRECIPITATION NEAR 100 PERCENT.
CHANCE OF THUNDER...30 PERCENT.
MAX TEMPERATURE.....39-44.
24 HR TREND......7 DEGREES COOLER.
MIN HUMIDITY........59-65 PERCENT.
24 HR TREND......21 PERCENT WETTER.
20-FOOT WINDS.......WEST WINDS 10 TO 15 MPH UNTIL 1500, THEN
NORTHWEST. GUSTS UP TO 30 MPH.
RIDGE TOP WINDS.....NORTHWEST 15 TO 20 MPH.
CHC OF WETTING RAIN.42 PERCENT.
TRANSPORT WINDS.....NORTHWEST 15 TO 20 MPH.
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 1200, THEN 4000-5600 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 1200, THEN GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. SNOW SHOWERS, SHOWERS LIKELY AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING.
LITTLE OR NO SNOW ACCUMULATION. CHANCE OF
PRECIPITATION 70 PERCENT.
CHANCE OF THUNDER...10 PERCENT.
MIN TEMPERATURE.....23-28.
24 HR TREND......6 DEGREES COOLER.
MAX HUMIDITY........87-93 PERCENT.
24 HR TREND......1 PERCENT DRIER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTH WINDS AROUND 10 MPH WITH GUSTS TO AROUND
25 MPH UNTIL 2100, THEN DOWNSLOPE/DOWNVALLEY
4-7 MPH.
RIDGE TOP WINDS.....NORTH 10 TO 15 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTH 10 TO 15 MPH.
MIXING HEIGHT.......1400-3400 FT AGL UNTIL 2400, THEN 400-600 FT
AGL.
SMOKE DISPERSAL.....POOR.
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....50-55.
24 HR TREND......10 DEGREES WARMER.
MIN HUMIDITY........36-42 PERCENT.
24 HR TREND......23 PERCENT DRIER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. GUSTS UP TO 20 MPH.
RIDGE TOP WINDS.....SOUTH AROUND 10 MPH UNTIL 1200, THEN WEST.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....SOUTH AROUND 10 MPH UNTIL 1200, THEN WEST.
MIXING HEIGHT.......1600-3600 FT AGL UNTIL 1200, THEN 6200-8200 FT
AGL.
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN GOOD.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 30S. WINDS
GENERALLY LESS THAN 10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE
LOWER 60S. SOUTHWEST WINDS AROUND 10 MPH.
SUNDAY THROUGH MEMORIAL DAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS 65 TO 70.
SOUTH WINDS AROUND 10 MPH.
TUESDAY
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE MID 60S.
WEDNESDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND SNOW
SHOWERS IN THE MORNING, THEN SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE LOWER 60S.
WYZ278-221245-
UPPER GREEN RIVER BASIN/ROCK SPRINGS BLM-
INCLUDING THE CITIES OF BIG PINEY, FARSON, AND PINEDALE
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS
IN THE MORNING. SNOW SHOWERS LIKELY AND CHANCE
OF SHOWERS THROUGH THE DAY. CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. LITTLE OR NO
SNOW ACCUMULATION. CHANCE OF PRECIPITATION 70
PERCENT.
CHANCE OF THUNDER...30 PERCENT.
MAX TEMPERATURE.....43-48.
24 HR TREND......6 DEGREES COOLER.
MIN HUMIDITY........45-51 PERCENT.
24 HR TREND......16 PERCENT WETTER.
20-FOOT WINDS.......WEST WINDS 10 TO 15 MPH UNTIL 1200, THEN
NORTHWEST AROUND 20 MPH. GUSTS UP TO 30 MPH.
RIDGE TOP WINDS.....WEST 15 TO 20 MPH.
CHC OF WETTING RAIN.32 PERCENT.
TRANSPORT WINDS.....WEST AROUND 15 MPH UNTIL 1200, THEN NORTHWEST
AROUND 25 MPH.
MIXING HEIGHT.......1800-3800 FT AGL UNTIL 1200, THEN 5200-7200 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 1200, THEN VERY GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF SHOWERS, SNOW SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS IN THE
EVENING. CHANCE OF PRECIPITATION 50 PERCENT.
CHANCE OF THUNDER...10 PERCENT.
MIN TEMPERATURE.....24-29.
24 HR TREND......4 DEGREES COOLER.
MAX HUMIDITY........88-94 PERCENT.
24 HR TREND......9 PERCENT WETTER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTH WINDS AROUND 15 MPH WITH GUSTS TO AROUND
25 MPH UNTIL 2100, THEN DOWNSLOPE/DOWNVALLEY
4-7 MPH.
RIDGE TOP WINDS.....NORTH AROUND 15 MPH UNTIL 2400, THEN WEST.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
TRANSPORT WINDS.....NORTH AROUND 15 MPH UNTIL 2400, THEN NORTHWEST.
MIXING HEIGHT.......1800-3800 FT AGL UNTIL 2400, THEN 600-800 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 2400, THEN POOR.
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....49-54.
24 HR TREND......7 DEGREES WARMER.
MIN HUMIDITY........29-35 PERCENT.
24 HR TREND......16 PERCENT DRIER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....SOUTHWEST AROUND 10 MPH.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....WEST 10 TO 15 MPH.
MIXING HEIGHT.......1400-3400 FT AGL UNTIL 1200, THEN 5000-7000 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 20S. WINDS
GENERALLY LESS THAN 10 MPH.
SATURDAY
WARMER. MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN
THE MID 60S. WEST WINDS AROUND 10 MPH.
SUNDAY THROUGH MEMORIAL DAY
MOSTLY CLEAR WITH SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS 36 TO 41. HIGHS 70 TO 75. SOUTH
WINDS AROUND 10 MPH.
TUESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE UPPER 60S.
WEDNESDAY
MOSTLY SUNNY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE UPPER 60S.
WYZ277-221245-
LINCOLN AND UINTA COUNTIES/LOWER ELEVATIONS-
INCLUDING THE CITIES OF EVANSTON, FORT BRIDGER, AND KEMMERER
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS
IN THE MORNING. CHANCE OF SHOWERS AND SNOW
SHOWERS THROUGH THE DAY. CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. CHANCE OF
PRECIPITATION 50 PERCENT.
CHANCE OF THUNDER...30 PERCENT.
MAX TEMPERATURE.....46-51.
24 HR TREND......6 DEGREES COOLER.
MIN HUMIDITY........41-47 PERCENT.
24 HR TREND......12 PERCENT WETTER.
20-FOOT WINDS.......WEST WINDS AROUND 10 MPH UNTIL 0900, THEN
NORTHWEST AROUND 20 MPH. GUSTS UP TO 30 MPH.
RIDGE TOP WINDS.....WEST 20 TO 25 MPH.
CHC OF WETTING RAIN.10 PERCENT.
TRANSPORT WINDS.....WEST 20 TO 25 MPH.
MIXING HEIGHT.......2000-4000 FT AGL UNTIL 1200, THEN 6200-8200 FT
AGL.
SMOKE DISPERSAL.....FAIR TO GOOD UNTIL 1200, THEN EXCELLENT.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR. CHANCE OF SNOW SHOWERS EARLY IN
THE EVENING. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS EARLY IN THE EVENING. CHANCE OF
PRECIPITATION 50 PERCENT.
CHANCE OF THUNDER...10 PERCENT.
MIN TEMPERATURE.....26-31.
24 HR TREND......4 DEGREES COOLER.
MAX HUMIDITY........87-93 PERCENT.
24 HR TREND......11 PERCENT WETTER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTH WINDS 10 TO 15 MPH WITH GUSTS TO AROUND
30 MPH UNTIL 2400, THEN DOWNSLOPE/DOWNVALLEY
4-7 MPH.
RIDGE TOP WINDS.....NORTH AROUND 15 MPH UNTIL 2400, THEN SOUTHEAST.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTH AROUND 15 MPH UNTIL 2400, THEN EAST.
MIXING HEIGHT.......2600-4600 FT AGL UNTIL 2400, THEN 400-1000 FT
AGL.
SMOKE DISPERSAL.....GOOD UNTIL 2400, THEN POOR.
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....52-57.
24 HR TREND......7 DEGREES WARMER.
MIN HUMIDITY........27-33 PERCENT.
24 HR TREND......12 PERCENT DRIER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. GUSTS UP TO 15 MPH.
RIDGE TOP WINDS.....SOUTHEAST AROUND 10 MPH UNTIL 1200, THEN
SOUTHWEST.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....SOUTHEAST AROUND 10 MPH UNTIL 1200, THEN WEST.
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 1200, THEN 6000-8000 FT
AGL.
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN GOOD.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
MOSTLY CLEAR. LOWS IN THE LOWER 30S. WINDS
GENERALLY LESS THAN 10 MPH.
SATURDAY THROUGH SUNDAY
MOSTLY CLEAR. LOWS 36 TO 41. HIGHS
67 TO 72. SOUTHWEST WINDS AROUND 10 MPH.
MEMORIAL DAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 70S.
SOUTH WINDS AROUND 10 MPH.
TUESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE UPPER 60S.
WEDNESDAY
MOSTLY SUNNY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE UPPER 60S.
WYZ279-221245-
SWEETWATER COUNTY/ROCK SPRINGS BLM/FLAMING GORGE NRA-
INCLUDING THE CITIES OF GREEN RIVER, ROCK SPRINGS, AND WAMSUTTER
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SNOW SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE MORNING.
SHOWERS LIKELY THROUGH THE DAY. CHANCE OF
THUNDERSTORMS AND SLIGHT CHANCE OF SNOW SHOWERS
IN THE AFTERNOON. NO SNOW ACCUMULATION. CHANCE
OF PRECIPITATION 70 PERCENT.
CHANCE OF THUNDER...40 PERCENT.
MAX TEMPERATURE.....46-51.
24 HR TREND......7 DEGREES COOLER.
MIN HUMIDITY........46-52 PERCENT.
24 HR TREND......24 PERCENT WETTER.
20-FOOT WINDS.......WEST WINDS 10 TO 15 MPH UNTIL 1200, THEN
NORTHWEST AROUND 20 MPH. GUSTS UP TO 30 MPH.
RIDGE TOP WINDS.....WEST AROUND 15 MPH UNTIL 1200, THEN AROUND 25
MPH.
CHC OF WETTING RAIN.5 PERCENT UNTIL 1200, THEN 30 PERCENT.
TRANSPORT WINDS.....WEST AROUND 15 MPH UNTIL 1200, THEN AROUND 25
MPH.
MIXING HEIGHT.......1800-3800 FT AGL UNTIL 1200, THEN 3800-5800 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 1200, THEN GOOD TO VERY
GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF SHOWERS, SNOW SHOWERS
AND SLIGHT CHANCE OF THUNDERSTORMS IN THE
EVENING. CHANCE OF PRECIPITATION 50 PERCENT.
CHANCE OF THUNDER...10 PERCENT.
MIN TEMPERATURE.....28-33.
24 HR TREND......4 DEGREES COOLER.
MAX HUMIDITY........88-94 PERCENT.
24 HR TREND......21 PERCENT WETTER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTH WINDS 10 TO 15 MPH WITH GUSTS TO AROUND
30 MPH UNTIL 2400, THEN DOWNSLOPE/DOWNVALLEY
4-7 MPH.
RIDGE TOP WINDS.....NORTH AROUND 20 MPH UNTIL 2400, THEN NORTHEAST
AROUND 10 MPH.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
TRANSPORT WINDS.....NORTH AROUND 20 MPH UNTIL 2400, THEN NORTHEAST
AROUND 10 MPH.
MIXING HEIGHT.......2200-4200 FT AGL UNTIL 2400, THEN 600-1200 FT
AGL.
SMOKE DISPERSAL.....FAIR TO GOOD UNTIL 2400, THEN POOR.
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....51-56.
24 HR TREND......5 DEGREES WARMER.
MIN HUMIDITY........32-38 PERCENT.
24 HR TREND......15 PERCENT DRIER.
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. GUSTS UP TO 15 MPH.
RIDGE TOP WINDS.....SOUTH AROUND 10 MPH UNTIL 1200, THEN WEST.
CHC OF WETTING RAIN.ZERO PERCENT.
TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH UNTIL 1200, THEN WEST.
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 1200, THEN 4800-6800 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 30S. WINDS
GENERALLY LESS THAN 10 MPH.
SATURDAY
WARMER. MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN
THE UPPER 60S. SOUTHWEST WINDS AROUND 10 MPH.
SUNDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 70S.
SOUTHWEST WINDS AROUND 10 MPH.
MEMORIAL DAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE MID 70S. SOUTH
WINDS AROUND 10 MPH.
TUESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS AROUND 70.
WEDNESDAY
MOSTLY SUNNY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE LOWER 70S.
WYZ289-221245-
GRANITE/GREEN/FERRIS/RATTLESNAKE MOUNTAINS-
INCLUDING THE CITY OF JEFFREY CITY
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SNOW SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE MORNING.
SHOWERS LIKELY THROUGH THE DAY. SNOW SHOWERS
AND CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
NO SNOW ACCUMULATION. CHANCE OF PRECIPITATION
NEAR 100 PERCENT.
CHANCE OF THUNDER...30 PERCENT.
MAX TEMPERATURE.....43-48.
24 HR TREND......10 DEGREES COOLER.
MIN HUMIDITY........56-62 PERCENT.
24 HR TREND......32 PERCENT WETTER.
20-FOOT WINDS.......WEST WINDS 10 TO 15 MPH UNTIL 1500, THEN
NORTHWEST. GUSTS UP TO 30 MPH.
RIDGE TOP WINDS.....SOUTHWEST AROUND 15 MPH UNTIL 1200, THEN
NORTHWEST.
CHC OF WETTING RAIN.15 PERCENT UNTIL 1200, THEN 50 PERCENT.
TRANSPORT WINDS.....SOUTHWEST AROUND 20 MPH UNTIL 1200, THEN
NORTHWEST.
MIXING HEIGHT.......1600-3600 FT AGL.
SMOKE DISPERSAL.....POOR TO FAIR.
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
CHANCE OF SHOWERS AND SNOW SHOWERS THROUGH THE
NIGHT. CHANCE OF PRECIPITATION 50 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....28-33.
24 HR TREND......3 DEGREES COOLER.
MAX HUMIDITY........91-97 PERCENT.
24 HR TREND......14 PERCENT WETTER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTH WINDS 10 TO 15 MPH WITH GUSTS TO AROUND
30 MPH UNTIL 2400, THEN DOWNSLOPE/DOWNVALLEY
4-7 MPH.
RIDGE TOP WINDS.....NORTH AROUND 20 MPH UNTIL 2400, THEN NORTHWEST
AROUND 10 MPH.
CHC OF WETTING RAIN.25 PERCENT UNTIL 2400, THEN 5 PERCENT.
TRANSPORT WINDS.....NORTH 15 TO 20 MPH.
MIXING HEIGHT.......600-2200 FT AGL.
SMOKE DISPERSAL.....POOR.
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....48-53.
24 HR TREND......6 DEGREES WARMER.
MIN HUMIDITY........36-42 PERCENT.
24 HR TREND......22 PERCENT DRIER.
20-FOOT WINDS.......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.
TRANSPORT WINDS.....WEST 10 TO 15 MPH.
MIXING HEIGHT.......1600-3600 FT AGL UNTIL 1200, THEN 5400-7400 FT
AGL.
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN GOOD.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 30S. WINDS
GENERALLY LESS THAN 10 MPH.
SATURDAY
WARMER. MOSTLY CLEAR. LOWS AROUND 40. HIGHS IN THE
MID 60S. SOUTHWEST WINDS AROUND 10 MPH.
SUNDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 70S.
SOUTHWEST WINDS AROUND 10 MPH.
MEMORIAL DAY
MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE
MID 70S. SOUTHWEST WINDS AROUND 10 MPH.
TUESDAY THROUGH WEDNESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE
LOWER 70S.
WYZ300-221245-
CASPER MOUNTAIN-
434 AM MDT THU MAY 21 2026
TODAY
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SHOWERS AND SNOW
SHOWERS IN THE MORNING, THEN SHOWERS, SNOW
SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS IN
THE AFTERNOON. NO SNOW ACCUMULATION. CHANCE OF
PRECIPITATION 70 PERCENT.
CHANCE OF THUNDER...30 PERCENT.
MAX TEMPERATURE.....44-49.
24 HR TREND......6 DEGREES COOLER.
MIN HUMIDITY........51-57 PERCENT.
24 HR TREND......23 PERCENT WETTER.
20-FOOT WINDS.......SOUTHWEST WINDS 10 TO 15 MPH UNTIL 1500, THEN
WEST. GUSTS UP TO 25 MPH.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 20 PERCENT.
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH.
MIXING HEIGHT.......2200-4200 FT AGL.
SMOKE DISPERSAL.....FAIR TO GOOD.
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY. SNOW SHOWERS LIKELY AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE EVENING. SHOWERS
LIKELY THROUGH THE NIGHT. SNOW SHOWERS AFTER
MIDNIGHT. SNOW ACCUMULATION UP TO 2 INCHES.
CHANCE OF PRECIPITATION 80 PERCENT.
CHANCE OF THUNDER...10 PERCENT.
MIN TEMPERATURE.....29-34.
24 HR TREND......1 DEGREE COOLER.
MAX HUMIDITY........93-99 PERCENT.
24 HR TREND......23 PERCENT WETTER.
HUMIDITY RECOVERY...EXCELLENT.
20-FOOT WINDS.......NORTHWEST WINDS AROUND 10 MPH AND GUSTY.
RIDGE TOP WINDS.....NORTHWEST AROUND 15 MPH.
CHC OF WETTING RAIN.60 PERCENT UNTIL 2400, THEN 30 PERCENT.
TRANSPORT WINDS.....NORTH AROUND 15 MPH.
MIXING HEIGHT.......800-1800 FT AGL.
SMOKE DISPERSAL.....POOR.
FRIDAY
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
SLIGHT CHANCE OF SHOWERS AND SNOW SHOWERS IN
THE MORNING. CHANCE OF PRECIPITATION 20
PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....48-53.
24 HR TREND......3 DEGREES WARMER.
MIN HUMIDITY........39-45 PERCENT.
24 HR TREND......11 PERCENT DRIER.
20-FOOT WINDS.......WEST WINDS AROUND 10 MPH WITH HIGHER GUSTS.
RIDGE TOP WINDS.....WEST AROUND 15 MPH.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
TRANSPORT WINDS.....WEST 15 TO 20 MPH.
MIXING HEIGHT.......1600-3600 FT AGL UNTIL 1200, THEN 5200-7200 FT
AGL.
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 1200, THEN GOOD TO VERY
GOOD.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 30S. WINDS
GENERALLY LESS THAN 10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS AROUND 40. HIGHS AROUND 60.
SOUTHWEST WINDS AROUND 10 MPH.
SUNDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE UPPER 60S.
SOUTHWEST WINDS AROUND 10 MPH.
MEMORIAL DAY
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE
LOWER 70S. SOUTH WINDS AROUND 10 MPH.
TUESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE MID 40S. HIGHS IN THE UPPER 60S.
WEDNESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE AFTERNOON. HIGHS IN THE UPPER 60S.
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