641  
FNUS55 KCYS 211004  
FWFCYS  
 
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST WYOMING/WESTERN NEBRASKA  
NATIONAL WEATHER SERVICE CHEYENNE WY  
304 AM MST MON JAN 21 2019  
 
...WINTER STORM WARNING AND WINTER WEATHER ADVISORIES IN EFFECT FROM  
11 AM THIS MORNING TO 11 AM MST TUESDAY...  
 
   
DISCUSSION
 
A PACIFIC STORM SYSTEM WILL PUSH ACROSS THE REGION  
TODAY AND TONIGHT RESULTING IN VERY WINDY CONDITIONS AND WIDESPREAD  
SNOW AND BLOWING SNOW. A RELATIVELY COLD PATTERN IS EXPECTED TO  
REMAIN OVER THE AREA THROUGH THE WEEK WITH OCCASIONAL SNOW SHOWERS.  
 
WYZ301-220400-  
NIOBRARA/LOWER ELEVATIONS OF CONVERSE/THUNDER BASIN NATIONAL  
GRASSLAND-  
304 AM MST MON JAN 21 2019  
 
...WINTER STORM WARNING IN EFFECT FROM 11 AM THIS MORNING TO  
11 AM MST TUESDAY...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SPRINKLES UNTIL 1200.  
SNOW. CHANCE OF LIGHT FREEZING DRIZZLE AFTER  
1200. PATCHY BLOWING SNOW AFTER 1600. SNOW  
ACCUMULATION OF 1 TO 3 INCHES.  
MAX TEMPERATURE.....38-43.  
24 HR TREND......4 DEGREES COOLER.  
MIN HUMIDITY........48-54 PERCENT.  
24 HR TREND......7 PERCENT DRIER.  
20-FOOT WINDS.......WEST AROUND 5 MPH WITH HIGHER GUSTS INCREASING  
TO NORTHWEST AROUND 15 MPH WITH GUSTS TO AROUND  
40 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.50 PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH SHIFTING TO THE  
NORTHWEST IN THE AFTERNOON.  
MIXING HEIGHT.......500-1000 FT AGL INCREASING TO 3500-4300 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR TO FAIR (10200-51600 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY. PATCHY BLOWING SNOW UNTIL 2000. AREAS  
OF BLOWING SNOW AFTER 2000 UNTIL 0500. PATCHY  
BLOWING SNOW AFTER 0500. SNOW UNTIL 2300. SNOW  
LIKELY AFTER 2300 UNTIL 0500, THEN CHANCE OF  
FLURRIES. SNOW ACCUMULATION OF 2 TO 4 INCHES.  
MIN TEMPERATURE.....15-20.  
24 HR TREND......13 DEGREES COOLER.  
MAX HUMIDITY........82-88 PERCENT.  
24 HR TREND......9 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......BREEZY. NORTH AROUND 25 MPH WITH GUSTS TO  
AROUND 45 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.55 PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 40 MPH.  
MIXING HEIGHT.......2500-3400 FT AGL.  
SMOKE DISPERSAL.....VERY GOOD (106200-107700 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 0900, THEN PARTLY CLOUDY  
UNTIL 1500, THEN MOSTLY SUNNY. SLIGHT CHANCE OF  
SNOW UNTIL 1100. PATCHY BLOWING SNOW UNTIL  
1600.  
MAX TEMPERATURE.....25-30.  
24 HR TREND......14 DEGREES COOLER.  
MIN HUMIDITY........54-60 PERCENT.  
24 HR TREND......10 PERCENT WETTER.  
20-FOOT WINDS.......NORTHWEST 15 TO 20 MPH. GUSTS UP TO 45 MPH  
DECREASING TO 30 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 35 MPH DECREASING TO AROUND 25  
MPH IN THE AFTERNOON.  
MIXING HEIGHT.......2400-2900 FT AGL INCREASING TO 4100-5100 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD TO VERY GOOD (82500-100300 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
WEDNESDAY
 
PARTLY CLOUDY. CHANCE OF SNOW SHOWERS. PATCHY  
BLOWING SNOW. LOWS AROUND 17. HIGHS IN THE MID 30S. WEST WINDS  
AROUND 15 MPH.    
THURSDAY
 
COLDER. PATCHY BLOWING SNOW IN THE EVENING. MOSTLY  
CLOUDY WITH CHANCE OF SNOW SHOWERS. LOWS AROUND 14. HIGHS IN THE  
LOWER 20S. NORTHWEST WINDS AROUND 15 MPH.    
FRIDAY
 
NOT AS COOL. PARTLY CLOUDY WITH CHANCE OF SNOW SHOWERS.  
PATCHY BLOWING SNOW. LOWS AROUND 16. HIGHS IN THE MID 30S. WEST  
WINDS AROUND 15 MPH.    
SATURDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS. LOWS IN  
THE LOWER 20S. HIGHS IN THE MID 30S.    
SUNDAY
 
PARTLY CLOUDY WITH CHANCE OF SNOW SHOWERS. LOWS IN THE  
LOWER 20S. HIGHS IN THE UPPER 30S.  
 

 
 
WYZ302-220400-  
NORTH LARAMIE RANGE/MEDICINE BOW NF-  
304 AM MST MON JAN 21 2019  
 
...WINTER STORM WARNING IN EFFECT FROM 11 AM THIS MORNING TO  
11 AM MST TUESDAY...  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 0900, THEN MOSTLY CLOUDY.  
CHANCE OF FLURRIES UNTIL 0900. CHANCE OF SNOW  
AFTER 0900 UNTIL 1100, THEN SNOW. PATCHY  
BLOWING SNOW AFTER 1500. SNOW ACCUMULATION OF 1  
TO 6 INCHES.  
MAX TEMPERATURE.....33-41.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........49-55 PERCENT.  
24 HR TREND......17 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH SHIFTING TO THE  
NORTHWEST IN THE AFTERNOON. GUSTS UP TO 35 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.50 PERCENT.  
TRANSPORT WINDS.....WEST 30 TO 35 MPH.  
MIXING HEIGHT.......500-1000 FT AGL INCREASING TO 4000-5400 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (21300 KNOT-FT) INCREASING TO VERY GOOD  
(109300 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY. AREAS OF DENSE FREEZING FOG UNTIL 2400.  
AREAS OF BLOWING SNOW. SNOW UNTIL 2300. SNOW  
LIKELY AFTER 2300 UNTIL 0500, THEN CHANCE OF  
FLURRIES. SNOW ACCUMULATION OF 2 TO 7 INCHES.  
MIN TEMPERATURE.....9-17.  
24 HR TREND......12 DEGREES COOLER.  
MAX HUMIDITY........89-95 PERCENT.  
24 HR TREND......12 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......BREEZY. NORTH AROUND 25 MPH WITH GUSTS TO  
AROUND 45 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.60 PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 40 MPH.  
MIXING HEIGHT.......1600-3600 FT AGL.  
SMOKE DISPERSAL.....GOOD TO VERY GOOD (72500-104400 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 0900, THEN PARTLY CLOUDY  
UNTIL 1500, THEN MOSTLY SUNNY. CHANCE OF SNOW  
UNTIL 1100. PATCHY BLOWING SNOW UNTIL 0700.  
PATCHY BLOWING SNOW AFTER 0700 UNTIL 1400.  
PATCHY BLOWING SNOW AFTER 1600.  
MAX TEMPERATURE.....17-25.  
24 HR TREND......18 DEGREES COOLER.  
MIN HUMIDITY........57-63 PERCENT.  
24 HR TREND......15 PERCENT WETTER.  
20-FOOT WINDS.......NORTHWEST 15 TO 20 MPH. GUSTS UP TO 40 MPH  
DECREASING TO 30 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....NORTHWEST 25 TO 30 MPH.  
MIXING HEIGHT.......2600-4600 FT AGL.  
SMOKE DISPERSAL.....GOOD (77100-86000 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
WEDNESDAY
 
BREEZY. PARTLY CLOUDY. CHANCE OF SNOW SHOWERS.  
PATCHY BLOWING SNOW IN THE EVENING. PATCHY BLOWING SNOW. LOWS  
AROUND 13. HIGHS IN THE UPPER 20S. WEST WINDS AROUND 25 MPH.    
THURSDAY
 
PATCHY BLOWING SNOW. MOSTLY CLOUDY WITH CHANCE OF  
SNOW SHOWERS. LOWS AROUND 12. HIGHS AROUND 20. WEST WINDS AROUND  
20 MPH.    
FRIDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW SHOWERS.  
PATCHY BLOWING SNOW. LOWS AROUND 15. HIGHS AROUND 30. WEST WINDS  
AROUND 20 MPH.    
SATURDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS. PATCHY  
BLOWING SNOW. LOWS AROUND 17. HIGHS IN THE UPPER 20S.    
SUNDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW SHOWERS.  
PATCHY BLOWING SNOW. LOWS IN THE LOWER 20S. HIGHS IN THE LOWER  
30S.  
 

 
 
WYZ303-220400-  
CENTRAL AND NORTHERN CARBON/FERRIS-SEMINOE-SHIRLEY MOUNTAINS-  
304 AM MST MON JAN 21 2019  
 
...WINTER WEATHER ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO  
11 AM MST TUESDAY...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. SNOW AND CHANCE OF LIGHT  
FREEZING DRIZZLE. PATCHY BLOWING SNOW AFTER  
1300. AREAS OF FREEZING FOG AFTER 1700. SNOW  
ACCUMULATION OF 1 TO 5 INCHES.  
MAX TEMPERATURE.....31-37.  
24 HR TREND......3 DEGREES COOLER.  
MIN HUMIDITY........62-68 PERCENT.  
24 HR TREND......6 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH WITH HIGHER GUSTS  
SHIFTING TO THE WEST WITH GUSTS TO AROUND 35  
MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.55 PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 30 TO 35 MPH.  
MIXING HEIGHT.......500-1200 FT AGL INCREASING TO 3200-5200 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (19700 KNOT-FT) INCREASING TO VERY GOOD  
(110400 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY. AREAS OF BLOWING SNOW UNTIL 0100.  
PATCHY BLOWING SNOW AFTER 0100. SNOW UNTIL  
2300. SNOW LIKELY AFTER 2300 UNTIL 0500. CHANCE  
OF FLURRIES AFTER 0500. SNOW ACCUMULATION OF 2  
TO 5 INCHES.  
MIN TEMPERATURE.....8-13.  
24 HR TREND......17 DEGREES COOLER.  
MAX HUMIDITY........94-100 PERCENT.  
24 HR TREND......15 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......BREEZY. NORTH 20 TO 25 MPH. GUSTS UP TO 45 MPH  
DECREASING TO 35 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.55 PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 35 MPH DECREASING TO AROUND 25 MPH  
AFTER MIDNIGHT.  
MIXING HEIGHT.......1500-2900 FT AGL.  
SMOKE DISPERSAL.....FAIR TO GOOD (53200-76300 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 0900, THEN PARTLY CLOUDY.  
PATCHY BLOWING SNOW UNTIL 0700. CHANCE OF SNOW  
UNTIL 1100.  
MAX TEMPERATURE.....16-22.  
24 HR TREND......16 DEGREES COOLER.  
MIN HUMIDITY........63-69 PERCENT.  
24 HR TREND......1 PERCENT WETTER.  
20-FOOT WINDS.......WEST 10 TO 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....NORTHWEST 15 TO 20 MPH.  
MIXING HEIGHT.......1800-3600 FT AGL.  
SMOKE DISPERSAL.....POOR TO FAIR (34000-47900 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
WEDNESDAY
 
MOSTLY CLOUDY. CHANCE OF SNOW SHOWERS. PATCHY  
BLOWING SNOW. SLIGHT CHANCE OF SNOW IN THE MORNING. LOWS AROUND  
9. HIGHS IN THE MID 20S. SOUTHWEST WINDS AROUND 20 MPH.    
THURSDAY
 
PATCHY BLOWING SNOW IN THE EVENING. MOSTLY CLOUDY  
WITH CHANCE OF SNOW SHOWERS. LOWS AROUND 12. HIGHS IN THE LOWER  
20S. WEST WINDS AROUND 20 MPH.    
FRIDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW SHOWERS.  
PATCHY BLOWING SNOW. LOWS AROUND 11. HIGHS IN THE UPPER 20S. WEST  
WINDS AROUND 20 MPH.    
SATURDAY
 
MOSTLY CLOUDY. PATCHY BLOWING SNOW IN THE EVENING.  
PATCHY BLOWING SNOW IN THE MORNING. CHANCE OF SNOW SHOWERS. LOWS  
AROUND 13. HIGHS IN THE UPPER 20S.    
SUNDAY
 
PARTLY CLOUDY. PATCHY BLOWING SNOW. LOWS AROUND 17.  
HIGHS AROUND 30.  
 

 
 
WYZ304-220400-  
SOUTHWEST CARBON COUNTY-  
304 AM MST MON JAN 21 2019  
 
...WINTER WEATHER ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO  
11 AM MST TUESDAY...  
   
TODAY
 
 
SKY/WEATHER.........CLOUDY. CHANCE OF LIGHT FREEZING DRIZZLE UNTIL  
1200. SNOW. PATCHY BLOWING SNOW AFTER 1500  
UNTIL 1700, THEN AREAS OF BLOWING SNOW. SNOW  
ACCUMULATION OF 1 TO 3 INCHES.  
MAX TEMPERATURE.....30-36.  
24 HR TREND......1 DEGREE WARMER.  
MIN HUMIDITY........66-72 PERCENT.  
24 HR TREND......9 PERCENT DRIER.  
20-FOOT WINDS.......SOUTH AROUND 10 MPH WITH HIGHER GUSTS  
INCREASING TO WEST AROUND 20 MPH WITH GUSTS TO  
AROUND 35 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.65 PERCENT.  
TRANSPORT WINDS.....SOUTH AROUND 20 MPH INCREASING TO WEST AROUND  
35 MPH IN THE AFTERNOON.  
MIXING HEIGHT.......400-900 FT AGL INCREASING TO 3100-4900 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (11000 KNOT-FT) INCREASING TO GOOD (96100  
KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY. AREAS OF BLOWING SNOW UNTIL 2300.  
PATCHY BLOWING SNOW AFTER 2300. SNOW UNTIL  
2300, THEN CHANCE OF SNOW UNTIL 0500. CHANCE OF  
FLURRIES AFTER 0500. SNOW ACCUMULATION OF 1 TO  
2 INCHES.  
MIN TEMPERATURE.....5-10.  
24 HR TREND......16 DEGREES COOLER.  
MAX HUMIDITY........100 PERCENT.  
24 HR TREND......8 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTH AROUND 20 MPH. GUSTS UP TO 45 MPH  
DECREASING TO 35 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.45 PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 35 MPH DECREASING TO AROUND 25 MPH  
AFTER MIDNIGHT.  
MIXING HEIGHT.......700-2600 FT AGL.  
SMOKE DISPERSAL.....POOR TO GOOD (28500-63800 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 0900, THEN PARTLY CLOUDY.  
PATCHY BLOWING SNOW UNTIL 0800. SLIGHT CHANCE  
OF SNOW UNTIL 1100.  
MAX TEMPERATURE.....19-24.  
24 HR TREND......13 DEGREES COOLER.  
MIN HUMIDITY........59-65 PERCENT.  
24 HR TREND......5 PERCENT DRIER.  
20-FOOT WINDS.......NORTHWEST 10 TO 15 MPH. GUSTS UP TO 30 MPH  
DECREASING TO 20 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH.  
MIXING HEIGHT.......900-1400 FT AGL INCREASING TO 3200-4300 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (14600-37500 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
WEDNESDAY
 
MOSTLY CLOUDY. CHANCE OF SNOW SHOWERS. PATCHY  
BLOWING SNOW. LOWS AROUND 5. HIGHS IN THE MID 20S. SOUTHWEST  
WINDS AROUND 10 MPH.    
THURSDAY
 
CLOUDY WITH CHANCE OF SNOW SHOWERS. LOWS AROUND 14.  
HIGHS IN THE MID 20S. WEST WINDS AROUND 15 MPH.    
FRIDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS. LOWS  
AROUND 9. HIGHS IN THE UPPER 20S. SOUTHWEST WINDS AROUND 10 MPH.    
SATURDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS. LOWS  
AROUND 9. HIGHS IN THE UPPER 20S.    
SUNDAY
 
PARTLY CLOUDY. LOWS AROUND 11. HIGHS AROUND 30.  
 

 
 
WYZ305-220400-  
SIERRA MADRE RANGE/MEDICINE BOW NF-  
304 AM MST MON JAN 21 2019  
 
...WINTER WEATHER ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO  
11 AM MST TUESDAY...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF LIGHT FREEZING DRIZZLE  
UNTIL 1200. SNOW. SLIGHT CHANCE OF LIGHT  
FREEZING DRIZZLE AFTER 1200. PATCHY BLOWING  
SNOW AFTER 1100. SNOW ACCUMULATION OF 2 TO 6  
INCHES.  
MAX TEMPERATURE.....30-36.  
24 HR TREND......4 DEGREES COOLER.  
MIN HUMIDITY........62-68 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......SOUTHWEST AROUND 15 MPH WITH GUSTS TO AROUND 35  
MPH.  
LAL.................1.  
CHC OF WETTING RAIN.70 PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 30 TO 35 MPH.  
MIXING HEIGHT.......800-1700 FT AGL INCREASING TO 4600-6500 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (31700 KNOT-FT) INCREASING TO EXCELLENT  
(183700 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY. AREAS OF BLOWING SNOW UNTIL 2400, THEN  
PATCHY BLOWING SNOW. SNOW UNTIL 2300. SNOW  
LIKELY AFTER 2300 UNTIL 0500. CHANCE OF SNOW  
AFTER 0500. ONE QUARTER MILE OR LESS AT TIMES  
AFTER 2000 UNTIL 0100. SNOW ACCUMULATION OF 2  
TO 6 INCHES.  
MIN TEMPERATURE.....6-11.  
24 HR TREND......16 DEGREES COOLER.  
MAX HUMIDITY........100 PERCENT.  
24 HR TREND......22 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTH 15 TO 20 MPH WITH GUSTS TO AROUND 40 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.65 PERCENT.  
TRANSPORT WINDS.....NORTH 25 TO 30 MPH.  
MIXING HEIGHT.......1000-2300 FT AGL.  
SMOKE DISPERSAL.....POOR TO FAIR (32000-48900 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 1200, THEN PARTLY CLOUDY.  
PATCHY BLOWING SNOW UNTIL 0700. CHANCE OF SNOW  
UNTIL 1100.  
MAX TEMPERATURE.....14-20.  
24 HR TREND......14 DEGREES COOLER.  
MIN HUMIDITY........58-64 PERCENT.  
24 HR TREND......6 PERCENT WETTER.  
20-FOOT WINDS.......NORTHWEST 5 TO 10 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.10 PERCENT.  
TRANSPORT WINDS.....NORTHWEST 15 TO 20 MPH.  
MIXING HEIGHT.......2200-4200 FT AGL.  
SMOKE DISPERSAL.....POOR TO FAIR (34100-53400 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
WEDNESDAY
 
MOSTLY CLOUDY WITH SNOW SHOWERS LIKELY. SNOW LIKELY  
IN THE MORNING. PATCHY BLOWING SNOW. LOWS AROUND 7. HIGHS IN THE  
LOWER 20S. SOUTHWEST WINDS AROUND 15 MPH.    
THURSDAY
 
PATCHY BLOWING SNOW IN THE EVENING. SNOW SHOWERS  
LIKELY. LOWS AROUND 12. HIGHS IN THE LOWER 20S. WEST WINDS AROUND  
15 MPH.    
FRIDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS. LOWS AROUND  
11. HIGHS IN THE MID 20S. WEST WINDS AROUND 15 MPH.    
SATURDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS. LOWS  
AROUND 12. HIGHS IN THE MID 20S.    
SUNDAY
 
PARTLY CLOUDY. LOWS AROUND 13. HIGHS AROUND 30.  
 

 
 
WYZ306-220400-  
UPPER NORTH PLATTE RIVER BASIN-  
304 AM MST MON JAN 21 2019  
 
...WINTER WEATHER ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO  
11 AM MST TUESDAY...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. SNOW. CHANCE OF LIGHT FREEZING  
DRIZZLE AFTER 1200. SNOW ACCUMULATION OF 1 TO 2  
INCHES.  
MAX TEMPERATURE.....34-39.  
24 HR TREND......3 DEGREES COOLER.  
MIN HUMIDITY........58-64 PERCENT.  
24 HR TREND......5 PERCENT WETTER.  
20-FOOT WINDS.......SOUTH AROUND 10 MPH AND GUSTY SHIFTING TO THE  
WEST WITH HIGHER GUSTS IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.50 PERCENT.  
TRANSPORT WINDS.....SOUTH AROUND 25 MPH INCREASING TO SOUTHWEST  
AROUND 35 MPH IN THE AFTERNOON.  
MIXING HEIGHT.......800-1400 FT AGL INCREASING TO 5100-6600 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (18500 KNOT-FT) INCREASING TO EXCELLENT  
(176400 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY. PATCHY BLOWING SNOW UNTIL 2100. AREAS  
OF BLOWING SNOW AFTER 2100 UNTIL 2300, THEN  
PATCHY BLOWING SNOW UNTIL 0500. SNOW UNTIL  
2300. SNOW LIKELY AFTER 2300 UNTIL 0500, THEN  
CHANCE OF SNOW. SNOW ACCUMULATION OF 2 TO 5  
INCHES.  
MIN TEMPERATURE.....8-13.  
24 HR TREND......14 DEGREES COOLER.  
MAX HUMIDITY........94-100 PERCENT.  
24 HR TREND......22 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTH 15 TO 20 MPH WITH GUSTS TO AROUND 35 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.60 PERCENT.  
TRANSPORT WINDS.....NORTH 25 TO 30 MPH.  
MIXING HEIGHT.......1700-3000 FT AGL.  
SMOKE DISPERSAL.....FAIR (43900-55900 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 1200, THEN PARTLY CLOUDY.  
CHANCE OF SNOW UNTIL 1100.  
MAX TEMPERATURE.....17-22.  
24 HR TREND......17 DEGREES COOLER.  
MIN HUMIDITY........60-66 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......NORTHWEST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.10 PERCENT.  
TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.  
MIXING HEIGHT.......2400-4400 FT AGL.  
SMOKE DISPERSAL.....POOR TO FAIR (28300-54100 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
WEDNESDAY
 
MOSTLY CLOUDY. SNOW SHOWERS LIKELY. PATCHY BLOWING  
SNOW. LOWS AROUND 7. HIGHS IN THE MID 20S. SOUTHWEST WINDS AROUND  
15 MPH.    
THURSDAY
 
PATCHY BLOWING SNOW IN THE EVENING. CLOUDY WITH SNOW  
SHOWERS LIKELY. LOWS AROUND 12. HIGHS IN THE LOWER 20S. WEST  
WINDS AROUND 15 MPH.    
FRIDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS. LOWS AROUND  
11. HIGHS IN THE UPPER 20S. WEST WINDS AROUND 15 MPH.    
SATURDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS. LOWS  
AROUND 13. HIGHS IN THE UPPER 20S.    
SUNDAY
 
PARTLY CLOUDY. LOWS AROUND 15. HIGHS IN THE LOWER 30S.  
 

 
 
WYZ307-220400-  
SNOWY RANGE/MEDICINE BOW NF-  
304 AM MST MON JAN 21 2019  
 
...WINTER WEATHER ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO  
11 AM MST TUESDAY...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. PATCHY BLOWING SNOW. SNOW.  
CHANCE OF LIGHT FREEZING DRIZZLE AFTER 1200.  
SNOW ACCUMULATION OF 1 TO 3 INCHES.  
MAX TEMPERATURE.....31-37.  
24 HR TREND......4 DEGREES COOLER.  
MIN HUMIDITY........53-59 PERCENT.  
24 HR TREND......3 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 15 MPH WITH GUSTS TO AROUND 35  
MPH.  
LAL.................1.  
CHC OF WETTING RAIN.45 PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 30 TO 35 MPH.  
MIXING HEIGHT.......700-1300 FT AGL INCREASING TO 5500-7500 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (26600 KNOT-FT) INCREASING TO EXCELLENT  
(214700 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY. AREAS OF FREEZING FOG UNTIL 2400. AREAS  
OF BLOWING SNOW. SNOW UNTIL 2300. SNOW LIKELY  
AFTER 2300 UNTIL 0500. CHANCE OF SNOW AFTER  
0500. SNOW ACCUMULATION OF 2 TO 7 INCHES.  
MIN TEMPERATURE.....3-9.  
24 HR TREND......20 DEGREES COOLER.  
MAX HUMIDITY........94-100 PERCENT.  
24 HR TREND......19 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTH AROUND 20 MPH WITH GUSTS TO AROUND 40  
MPH.  
LAL.................1.  
CHC OF WETTING RAIN.65 PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 30 MPH.  
MIXING HEIGHT.......900-2400 FT AGL.  
SMOKE DISPERSAL.....POOR TO FAIR (26300-51400 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 1200, THEN PARTLY CLOUDY.  
CHANCE OF SNOW UNTIL 1100, THEN SLIGHT CHANCE  
OF SNOW UNTIL 1700. PATCHY BLOWING SNOW UNTIL  
1000. PATCHY BLOWING SNOW AFTER 1700.  
MAX TEMPERATURE.....13-18.  
24 HR TREND......19 DEGREES COOLER.  
MIN HUMIDITY........56-62 PERCENT.  
24 HR TREND......3 PERCENT WETTER.  
20-FOOT WINDS.......NORTHWEST 10 TO 15 MPH WITH GUSTS TO AROUND 35  
MPH.  
LAL.................1.  
CHC OF WETTING RAIN.10 PERCENT.  
TRANSPORT WINDS.....NORTHWEST 20 TO 25 MPH.  
MIXING HEIGHT.......2200-4200 FT AGL.  
SMOKE DISPERSAL.....FAIR TO GOOD (42000-69500 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
WEDNESDAY
 
MOSTLY CLOUDY. SNOW SHOWERS LIKELY. PATCHY BLOWING  
SNOW. LOWS AROUND 5. HIGHS IN THE LOWER 20S. WEST WINDS AROUND  
20 MPH.    
THURSDAY
 
SNOW SHOWERS LIKELY. AREAS OF BLOWING SNOW IN THE  
EVENING. PATCHY BLOWING SNOW. LOWS AROUND 10. HIGHS AROUND 19.  
WEST WINDS AROUND 20 MPH.    
FRIDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS. PATCHY  
BLOWING SNOW. LOWS AROUND 9. HIGHS IN THE MID 20S. WEST WINDS  
AROUND 20 MPH.    
SATURDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS. PATCHY  
BLOWING SNOW. LOWS AROUND 12. HIGHS IN THE MID 20S.    
SUNDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW SHOWERS.  
PATCHY BLOWING SNOW. LOWS AROUND 14. HIGHS AROUND 30.  
 

 
 
WYZ308-220400-  
LARAMIE VALLEY/SHIRLEY BASIN-  
304 AM MST MON JAN 21 2019  
 
...WINTER WEATHER ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO  
11 AM MST TUESDAY...  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 0900, THEN MOSTLY CLOUDY.  
SNOW. PATCHY BLOWING SNOW AFTER 1600. SNOW  
ACCUMULATION OF 1 TO 4 INCHES.  
MAX TEMPERATURE.....35-41.  
24 HR TREND......4 DEGREES COOLER.  
MIN HUMIDITY........52-58 PERCENT.  
24 HR TREND......11 PERCENT DRIER.  
20-FOOT WINDS.......WEST 10 TO 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.30 PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 25 TO 30 MPH.  
MIXING HEIGHT.......500-1000 FT AGL INCREASING TO 5000-7000 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (15900 KNOT-FT) INCREASING TO EXCELLENT  
(164000 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY. AREAS OF BLOWING SNOW. SNOW UNTIL 2300.  
SNOW LIKELY AFTER 2300 UNTIL 0500, THEN SLIGHT  
CHANCE OF SNOW. SNOW ACCUMULATION OF 2 TO 5  
INCHES.  
MIN TEMPERATURE.....8-13.  
24 HR TREND......12 DEGREES COOLER.  
MAX HUMIDITY........93-99 PERCENT.  
24 HR TREND......12 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTH AROUND 20 MPH WITH GUSTS TO AROUND 40  
MPH.  
LAL.................1.  
CHC OF WETTING RAIN.55 PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 35 MPH.  
MIXING HEIGHT.......1800-2600 FT AGL.  
SMOKE DISPERSAL.....FAIR TO GOOD (54400-67000 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 1200, THEN PARTLY CLOUDY.  
PATCHY BLOWING SNOW UNTIL 0800. SLIGHT CHANCE  
OF FLURRIES UNTIL 1100.  
MAX TEMPERATURE.....17-22.  
24 HR TREND......15 DEGREES COOLER.  
MIN HUMIDITY........60-66 PERCENT.  
24 HR TREND......6 PERCENT WETTER.  
20-FOOT WINDS.......NORTHWEST AROUND 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 25 MPH.  
MIXING HEIGHT.......1900-2400 FT AGL INCREASING TO 2900-4400 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....FAIR TO GOOD (46700-74900 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
WEDNESDAY
 
PARTLY CLOUDY. CHANCE OF SNOW SHOWERS. PATCHY  
BLOWING SNOW. LOWS AROUND 7. HIGHS IN THE MID 20S. WEST WINDS  
AROUND 20 MPH.    
THURSDAY
 
PATCHY BLOWING SNOW IN THE EVENING. MOSTLY CLOUDY  
WITH CHANCE OF SNOW SHOWERS. LOWS AROUND 12. HIGHS AROUND 20.  
WEST WINDS AROUND 20 MPH.    
FRIDAY
 
PARTLY CLOUDY WITH CHANCE OF SNOW SHOWERS. PATCHY  
BLOWING SNOW. LOWS AROUND 11. HIGHS IN THE UPPER 20S. WEST WINDS  
AROUND 20 MPH.    
SATURDAY
 
MOSTLY CLOUDY. CHANCE OF SNOW SHOWERS. PATCHY BLOWING  
SNOW IN THE EVENING. PATCHY BLOWING SNOW. LOWS AROUND 13. HIGHS  
IN THE UPPER 20S.    
SUNDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS. PATCHY  
BLOWING SNOW. LOWS AROUND 17. HIGHS IN THE LOWER 30S.  
 

 
 
WYZ309-220400-  
SOUTH LARAMIE RANGE/MEDICINE BOW NF-  
304 AM MST MON JAN 21 2019  
 
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO  
11 AM MST TUESDAY...  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 1200, THEN MOSTLY CLOUDY.  
SLIGHT CHANCE OF SNOW AFTER 1100 UNTIL 1500,  
THEN SNOW LIKELY UNTIL 1700, THEN SNOW AND  
CHANCE OF LIGHT FREEZING DRIZZLE. SNOW  
ACCUMULATION UP TO 1 INCH.  
MAX TEMPERATURE.....39-47.  
24 HR TREND......3 DEGREES COOLER.  
MIN HUMIDITY........40-46 PERCENT.  
24 HR TREND......1 PERCENT DRIER.  
20-FOOT WINDS.......WEST AROUND 15 MPH WITH GUSTS TO AROUND 35 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.25 PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 30 MPH.  
MIXING HEIGHT.......500-1000 FT AGL INCREASING TO 5700-7600 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (16900 KNOT-FT) INCREASING TO EXCELLENT  
(170100 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY. AREAS OF BLOWING SNOW. SNOW UNTIL 2300.  
SNOW LIKELY AFTER 2300 UNTIL 0500. CHANCE OF  
FLURRIES AFTER 0500. SNOW ACCUMULATION OF 2 TO  
6 INCHES.  
MIN TEMPERATURE.....11-19.  
24 HR TREND......14 DEGREES COOLER.  
MAX HUMIDITY........87-93 PERCENT.  
24 HR TREND......29 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......BREEZY. NORTH 20 TO 25 MPH WITH GUSTS TO AROUND  
45 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.55 PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 35 MPH INCREASING TO AROUND 45 MPH  
AFTER MIDNIGHT.  
MIXING HEIGHT.......1800-3800 FT AGL.  
SMOKE DISPERSAL.....GOOD (71000 KNOT-FT) INCREASING TO VERY GOOD  
(125500 KNOT-FT) AFTER MIDNIGHT.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 1200, THEN PARTLY CLOUDY  
UNTIL 1500, THEN MOSTLY SUNNY. CHANCE OF SNOW  
UNTIL 1100. PATCHY BLOWING SNOW.  
MAX TEMPERATURE.....19-27.  
24 HR TREND......23 DEGREES COOLER.  
MIN HUMIDITY........52-58 PERCENT.  
24 HR TREND......23 PERCENT WETTER.  
20-FOOT WINDS.......NORTHWEST AROUND 20 MPH WITH GUSTS TO AROUND 40  
MPH.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....NORTHWEST 30 TO 35 MPH.  
MIXING HEIGHT.......2400-3600 FT AGL INCREASING TO 3900-5900 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD TO VERY GOOD (98500-128000 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
WEDNESDAY
 
BREEZY. PARTLY CLOUDY. PATCHY BLOWING SNOW. LOWS  
AROUND 14. HIGHS IN THE LOWER 30S. WEST WINDS AROUND 25 MPH.    
THURSDAY
 
BREEZY. PATCHY BLOWING SNOW. MOSTLY CLOUDY WITH  
CHANCE OF SNOW SHOWERS. LOWS AROUND 16. HIGHS IN THE MID 20S.  
NORTHWEST WINDS AROUND 25 MPH.    
FRIDAY
 
PARTLY CLOUDY WITH CHANCE OF FLURRIES. PATCHY BLOWING  
SNOW. LOWS AROUND 17. HIGHS IN THE LOWER 30S. WEST WINDS AROUND  
20 MPH.    
SATURDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS. PATCHY  
BLOWING SNOW. LOWS AROUND 19. HIGHS IN THE LOWER 30S.    
SUNDAY
 
PARTLY CLOUDY. PATCHY BLOWING SNOW. LOWS IN THE MID  
20S. HIGHS IN THE UPPER 30S.  
 

 
 
WYZ310-220400-  
PLATTE/GOSHEN/CENTRAL AND EASTERN LARAMIE-  
304 AM MST MON JAN 21 2019  
 
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO  
11 AM MST TUESDAY...  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 0900, THEN MOSTLY CLOUDY.  
SLIGHT CHANCE OF SNOW AFTER 0800 UNTIL 1500.  
SNOW LIKELY AND CHANCE OF DRIZZLE AFTER 1500  
UNTIL 1700, THEN SNOW, DRIZZLE AND CHANCE OF  
LIGHT FREEZING DRIZZLE. SNOW ACCUMULATION UP TO  
1 INCH.  
MAX TEMPERATURE.....45-50.  
24 HR TREND......4 DEGREES COOLER.  
MIN HUMIDITY........38-44 PERCENT.  
24 HR TREND......1 PERCENT DRIER.  
20-FOOT WINDS.......SOUTH AROUND 5 MPH AND GUSTY SHIFTING TO THE  
NORTH WITH GUSTS TO AROUND 35 MPH IN THE  
AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.25 PERCENT.  
TRANSPORT WINDS.....SOUTH AROUND 10 MPH SHIFTING TO THE WEST IN THE  
AFTERNOON.  
MIXING HEIGHT.......400-900 FT AGL INCREASING TO 5100-7100 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (6400 KNOT-FT) INCREASING TO GOOD (61000  
KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY. SNOW AND CHANCE OF LIGHT FREEZING  
DRIZZLE UNTIL 2400. SNOW LIKELY AFTER 2400.  
PATCHY BLOWING SNOW AFTER 1900 UNTIL 2300, THEN  
AREAS OF BLOWING SNOW UNTIL 0500, THEN PATCHY  
BLOWING SNOW. SNOW ACCUMULATION OF 2 TO 6  
INCHES.  
MIN TEMPERATURE.....16-21.  
24 HR TREND......9 DEGREES COOLER.  
MAX HUMIDITY........83-89 PERCENT.  
24 HR TREND......14 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......BREEZY. NORTH AROUND 25 MPH WITH GUSTS TO  
AROUND 45 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.60 PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 40 MPH INCREASING TO AROUND 50 MPH  
AFTER MIDNIGHT.  
MIXING HEIGHT.......2100-3700 FT AGL.  
SMOKE DISPERSAL.....GOOD (84500 KNOT-FT) INCREASING TO VERY GOOD  
(136200 KNOT-FT) AFTER MIDNIGHT.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 1200, THEN PARTLY CLOUDY  
UNTIL 1500, THEN MOSTLY SUNNY. SLIGHT CHANCE OF  
SNOW UNTIL 1100. PATCHY BLOWING SNOW UNTIL  
1700.  
MAX TEMPERATURE.....26-31.  
24 HR TREND......21 DEGREES COOLER.  
MIN HUMIDITY........51-57 PERCENT.  
24 HR TREND......14 PERCENT WETTER.  
20-FOOT WINDS.......BREEZY. NORTHWEST 20 TO 25 MPH WITH GUSTS TO  
AROUND 45 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 40 MPH DECREASING TO AROUND 30  
MPH IN THE AFTERNOON.  
MIXING HEIGHT.......3100-3800 FT AGL INCREASING TO 5200-6000 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....VERY GOOD TO EXCELLENT (128600-154900 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
WEDNESDAY
 
PARTLY CLOUDY. PATCHY BLOWING SNOW. LOWS AROUND 17.  
HIGHS IN THE UPPER 30S. WEST WINDS AROUND 20 MPH.    
THURSDAY
 
COLDER. MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS.  
LOWS AROUND 18. HIGHS IN THE MID 20S. NORTHWEST WINDS AROUND  
20 MPH.    
FRIDAY
 
NOT AS COOL. PARTLY CLOUDY. LOWS AROUND 20. HIGHS  
AROUND 40. WEST WINDS AROUND 15 MPH.    
SATURDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS. LOWS IN  
THE LOWER 20S. HIGHS IN THE UPPER 30S.    
SUNDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW SHOWERS. LOWS  
IN THE MID 20S. HIGHS IN THE MID 40S.  
 

 
 
NEZ311-220400-  
PINE RIDGE/NEBRASKA NATIONAL FOREST/OGLALA NATIONAL GRASSLANDS-  
304 AM MST MON JAN 21 2019  
 
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO  
11 AM MST TUESDAY...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SPRINKLES AND FLURRIES  
UNTIL 1200. SNOW WITH POSSIBLE DRIZZLE AND  
FREEZING DRIZZLE AFTER 1200. SNOW ACCUMULATION  
UP TO 1 INCH.  
MAX TEMPERATURE.....39-44.  
24 HR TREND......4 DEGREES COOLER.  
MIN HUMIDITY........52-58 PERCENT.  
24 HR TREND......5 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH SHIFTING TO THE NORTH  
IN THE AFTERNOON. GUSTS UP TO 25 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.10 PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH SHIFTING TO THE  
NORTHWEST IN THE AFTERNOON.  
MIXING HEIGHT.......500-2500 FT AGL.  
SMOKE DISPERSAL.....POOR (7500-10100 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY. AREAS OF FREEZING FOG AND PATCHY  
BLOWING SNOW UNTIL 2400. AREAS OF BLOWING SNOW  
AFTER 2400. SNOW UNTIL 0500. CHANCE OF FLURRIES  
AFTER 0500. SNOW ACCUMULATION OF 3 TO 5 INCHES.  
MIN TEMPERATURE.....14-19.  
24 HR TREND......10 DEGREES COOLER.  
MAX HUMIDITY........92-98 PERCENT.  
24 HR TREND......11 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTH 15 TO 20 MPH. GUSTS UP TO 30 MPH  
INCREASING TO 45 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.65 PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 25 MPH INCREASING TO AROUND 35 MPH  
AFTER MIDNIGHT.  
MIXING HEIGHT.......1700-2500 FT AGL.  
SMOKE DISPERSAL.....FAIR TO GOOD (42300-65200 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 0900, THEN PARTLY CLOUDY  
UNTIL 1500, THEN MOSTLY SUNNY. CHANCE OF SNOW  
UNTIL 1100. PATCHY BLOWING SNOW UNTIL 1600.  
MAX TEMPERATURE.....25-30.  
24 HR TREND......14 DEGREES COOLER.  
MIN HUMIDITY........60-66 PERCENT.  
24 HR TREND......6 PERCENT WETTER.  
20-FOOT WINDS.......BREEZY. NORTHWEST 20 TO 25 MPH. GUSTS UP TO 45  
MPH DECREASING TO 35 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 35 MPH DECREASING TO AROUND 25  
MPH IN THE AFTERNOON.  
MIXING HEIGHT.......2400-3000 FT AGL INCREASING TO 4800-6200 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (83400 KNOT-FT) INCREASING TO VERY GOOD  
(134900 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
WEDNESDAY
 
NOT AS COOL. PARTLY CLOUDY WITH SLIGHT CHANCE OF  
SNOW SHOWERS. LOWS AROUND 17. HIGHS IN THE UPPER 30S. WEST WINDS  
AROUND 15 MPH.    
THURSDAY
 
COLDER. MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS.  
LOWS AROUND 16. HIGHS IN THE LOWER 20S. NORTHWEST WINDS AROUND  
15 MPH.    
FRIDAY
 
NOT AS COOL. PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW  
SHOWERS. LOWS AROUND 15. HIGHS IN THE UPPER 30S. WEST WINDS  
AROUND 15 MPH.    
SATURDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS. LOWS IN  
THE LOWER 20S. HIGHS IN THE UPPER 30S.    
SUNDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS. LOWS IN  
THE LOWER 20S. HIGHS IN THE LOWER 40S.  
 

 
 
NEZ312-220400-  
BOX BUTTE/SOUTH SIOUX-  
304 AM MST MON JAN 21 2019  
 
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO  
11 AM MST TUESDAY...  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 0900, THEN MOSTLY CLOUDY.  
SLIGHT CHANCE OF SNOW UNTIL 1200. CHANCE OF  
SPRINKLES. SNOW WITH POSSIBLE DRIZZLE AND  
FREEZING DRIZZLE AFTER 1200. SNOW ACCUMULATION  
UP TO 1 INCH.  
MAX TEMPERATURE.....40-45.  
24 HR TREND......9 DEGREES COOLER.  
MIN HUMIDITY........50-56 PERCENT.  
24 HR TREND......10 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHEAST AROUND 10 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....SOUTH 10 TO 15 MPH.  
MIXING HEIGHT.......300-1700 FT AGL.  
SMOKE DISPERSAL.....POOR (7300-9200 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY. SNOW AND CHANCE OF LIGHT FREEZING  
DRIZZLE UNTIL 2400, THEN SNOW LIKELY. PATCHY  
BLOWING SNOW AFTER 1900 UNTIL 2400. AREAS OF  
BLOWING SNOW AFTER 2400 UNTIL 0500, THEN PATCHY  
BLOWING SNOW. SNOW ACCUMULATION OF 2 TO 3  
INCHES.  
MIN TEMPERATURE.....14-19.  
24 HR TREND......11 DEGREES COOLER.  
MAX HUMIDITY........92-98 PERCENT.  
24 HR TREND......12 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......BREEZY. NORTH AROUND 15 MPH AND GUSTY  
INCREASING TO AROUND 25 MPH WITH GUSTS TO  
AROUND 45 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.60 PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 30 MPH INCREASING TO AROUND 40 MPH  
AFTER MIDNIGHT.  
MIXING HEIGHT.......1300-2800 FT AGL.  
SMOKE DISPERSAL.....FAIR TO GOOD (40200-83000 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 1200, THEN PARTLY CLOUDY  
UNTIL 1500, THEN MOSTLY SUNNY. CHANCE OF SNOW  
UNTIL 1100. PATCHY BLOWING SNOW UNTIL 0800.  
AREAS OF BLOWING SNOW AFTER 0800 UNTIL 0900,  
THEN PATCHY BLOWING SNOW UNTIL 1700.  
MAX TEMPERATURE.....26-31.  
24 HR TREND......13 DEGREES COOLER.  
MIN HUMIDITY........54-60 PERCENT.  
24 HR TREND......3 PERCENT WETTER.  
20-FOOT WINDS.......BREEZY. NORTHWEST 20 TO 25 MPH WITH GUSTS TO  
AROUND 45 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 40 MPH BECOMING NORTHWEST AROUND  
30 MPH IN THE AFTERNOON.  
MIXING HEIGHT.......2500-3000 FT AGL INCREASING TO 5100-5600 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (94600 KNOT-FT) INCREASING TO EXCELLENT  
(153200 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
WEDNESDAY
 
NOT AS COOL. PARTLY CLOUDY WITH SLIGHT CHANCE OF  
SNOW SHOWERS. LOWS AROUND 15. HIGHS AROUND 40. WEST WINDS AROUND  
15 MPH.    
THURSDAY
 
COLDER. MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS.  
LOWS AROUND 18. HIGHS IN THE MID 20S. NORTHWEST WINDS AROUND  
15 MPH.    
FRIDAY
 
NOT AS COOL. PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW  
SHOWERS. LOWS AROUND 16. HIGHS AROUND 40. WEST WINDS AROUND  
15 MPH.    
SATURDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS. LOWS IN  
THE LOWER 20S. HIGHS IN THE UPPER 30S.    
SUNDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW SHOWERS. LOWS  
IN THE LOWER 20S. HIGHS IN THE MID 40S.  
 

 
 
NEZ313-220400-  
SCOTTS BLUFF NATIONAL MONUMENT/WILDCAT HILLS-  
304 AM MST MON JAN 21 2019  
 
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO  
11 AM MST TUESDAY...  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 1200, THEN MOSTLY CLOUDY.  
PATCHY FOG UNTIL 1300. SLIGHT CHANCE OF DRIZZLE  
AND SNOW AFTER 1500 UNTIL 1700, THEN DRIZZLE  
WITH SNOW LIKELY. SNOW ACCUMULATION UP TO 1  
INCH.  
MAX TEMPERATURE.....41-46.  
24 HR TREND......11 DEGREES COOLER.  
MIN HUMIDITY........49-55 PERCENT.  
24 HR TREND......11 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHEAST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....SOUTHEAST 10 TO 15 MPH.  
MIXING HEIGHT.......300-2300 FT AGL.  
SMOKE DISPERSAL.....POOR (5600-15300 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY. CHANCE OF LIGHT FREEZING DRIZZLE UNTIL  
1900. SNOW UNTIL 0500. CHANCE OF SNOW AFTER  
0500. PATCHY BLOWING SNOW AFTER 2000 UNTIL  
0100. AREAS OF DENSE FREEZING FOG AFTER 2100  
UNTIL 2300. AREAS OF BLOWING SNOW AFTER 0100.  
SNOW ACCUMULATION OF 2 TO 5 INCHES.  
MIN TEMPERATURE.....16-21.  
24 HR TREND......5 DEGREES COOLER.  
MAX HUMIDITY........92-98 PERCENT.  
24 HR TREND......UNCHANGED.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......BREEZY. NORTH AROUND 15 MPH WITH GUSTS TO  
AROUND 35 MPH INCREASING TO AROUND 25 MPH WITH  
GUSTS TO AROUND 45 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.65 PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 25 MPH INCREASING TO AROUND 40 MPH  
AFTER MIDNIGHT.  
MIXING HEIGHT.......1000-3000 FT AGL.  
SMOKE DISPERSAL.....POOR (27500 KNOT-FT) INCREASING TO GOOD (93400  
KNOT-FT) AFTER MIDNIGHT.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 1200, THEN PARTLY CLOUDY  
UNTIL 1500, THEN MOSTLY SUNNY. CHANCE OF SNOW  
UNTIL 1100. AREAS OF BLOWING SNOW UNTIL 1100,  
THEN PATCHY BLOWING SNOW UNTIL 1700.  
MAX TEMPERATURE.....26-31.  
24 HR TREND......12 DEGREES COOLER.  
MIN HUMIDITY........57-63 PERCENT.  
24 HR TREND......5 PERCENT WETTER.  
20-FOOT WINDS.......BREEZY. NORTHWEST 20 TO 25 MPH WITH GUSTS TO  
AROUND 45 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.10 PERCENT.  
TRANSPORT WINDS.....NORTHWEST 35 TO 40 MPH.  
MIXING HEIGHT.......2800-3300 FT AGL INCREASING TO 4800-5500 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....VERY GOOD (110400 KNOT-FT) INCREASING TO  
EXCELLENT (164300 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
WEDNESDAY
 
NOT AS COOL. PARTLY CLOUDY. PATCHY BLOWING SNOW.  
LOWS AROUND 15. HIGHS AROUND 40. WEST WINDS AROUND 15 MPH.    
THURSDAY
 
COLDER. MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS.  
LOWS AROUND 20. HIGHS IN THE MID 20S. NORTHWEST WINDS AROUND  
15 MPH.    
FRIDAY
 
NOT AS COOL. PARTLY CLOUDY. LOWS AROUND 17. HIGHS IN  
THE LOWER 40S. WEST WINDS AROUND 15 MPH.    
SATURDAY
 
MOSTLY CLOUDY WITH SLIGHT CHANCE OF SNOW SHOWERS.  
LOWS IN THE LOWER 20S. HIGHS IN THE UPPER 30S.    
SUNDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW SHOWERS. LOWS  
IN THE LOWER 20S. HIGHS IN THE MID 40S.  
 

 
 
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