741  
FNUS55 KCYS 130956  
FWFCYS  
 
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST WYOMING/WESTERN NEBRASKA  
NATIONAL WEATHER SERVICE CHEYENNE WY  
356 AM MDT TUE APR 13 2021  
 
WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM WEDNESDAY TO 6 PM  
MDT FRIDAY  
WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO  
NOON MDT WEDNESDAY  
WINTER STORM WARNING IN EFFECT FROM 6 PM WEDNESDAY TO 6 PM MDT  
FRIDAY   
DISCUSSION
 
 
NO FIRE WEATHER CONCERNS THROUGH THIS WEEK WITH COLDER  
TEMPERATURES, ELEVATED HUMIDITIES, AND ACCUMULATING  
SNOWFALL/RAINFALL THROUGHOUT THE WEEK. MAIN CHANCES OF  
SNOWFALL/RAINFALL FOR THE NEBRASKA PANHANDLE WILL BE WEDNESDAY  
NIGHT THROUGH FRIDAY.  
 
WYZ301-132215-  
NIOBRARA/LOWER ELEVATIONS OF CONVERSE/THUNDER BASIN NATIONAL  
GRASSLAND-  
356 AM MDT TUE APR 13 2021  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MAX TEMPERATURE.....37-42.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........27-33 PERCENT.  
24 HR TREND......4 PERCENT WETTER.  
20-FOOT WINDS.......NORTHWEST AROUND 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST 15 TO 20 MPH.  
MIXING HEIGHT.......3900-5900 FT AGL.  
SMOKE DISPERSAL.....GOOD (65000-66100 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 2400, THEN MOSTLY CLOUDY.  
CHANCE OF FLURRIES AFTER 2400.  
MIN TEMPERATURE.....21-26.  
24 HR TREND......2 DEGREES WARMER.  
MAX HUMIDITY........72-78 PERCENT.  
24 HR TREND......6 PERCENT DRIER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......NORTH AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 15 MPH.  
MIXING HEIGHT.......3700-4800 FT AGL DECREASING TO 2200-2800 FT AGL  
AFTER MIDNIGHT.  
SMOKE DISPERSAL.....POOR TO FAIR (30500-49000 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SNOW AND SLIGHT CHANCE  
OF LIGHT FREEZING RAIN UNTIL 1200, THEN CHANCE  
OF SPRINKLES AND FLURRIES.  
MAX TEMPERATURE.....37-42.  
24 HR TREND......UNCHANGED.  
MIN HUMIDITY........43-49 PERCENT.  
24 HR TREND......11 PERCENT WETTER.  
20-FOOT WINDS.......NORTHEAST AROUND 10 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....EAST 10 TO 15 MPH.  
MIXING HEIGHT.......2800-4800 FT AGL.  
SMOKE DISPERSAL.....POOR TO GOOD (24600-62400 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
SNOW LIKELY AND SLIGHT CHANCE OF FREEZING RAIN.  
PATCHY BLOWING SNOW. LOWS IN THE UPPER 20S. HIGHS IN THE MID 30S.  
EAST WINDS AROUND 15 MPH.    
FRIDAY
 
CLOUDY WITH SNOW LIKELY. LOWS IN THE UPPER 20S. HIGHS  
IN THE UPPER 30S. NORTH WINDS AROUND 10 MPH.    
SATURDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SNOW. LOWS IN THE MID  
20S. HIGHS IN THE LOWER 40S. NORTHWEST WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLEAR. LOWS IN THE MID 20S. HIGHS IN THE LOWER  
50S.    
MONDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN AND SNOW. LOWS  
AROUND 30. HIGHS IN THE LOWER 50S.  
 

 
 
WYZ302-132215-  
NORTH LARAMIE RANGE/MEDICINE BOW NF-  
356 AM MDT TUE APR 13 2021  
 
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM WEDNESDAY TO 6 PM  
MDT FRIDAY...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 1200, THEN PARTLY CLOUDY  
UNTIL 1500, THEN MOSTLY CLOUDY. CHANCE OF  
FLURRIES AFTER 1200.  
MAX TEMPERATURE.....28-34.  
24 HR TREND......3 DEGREES COOLER.  
MIN HUMIDITY........41-47 PERCENT.  
24 HR TREND......1 PERCENT WETTER.  
20-FOOT WINDS.......NORTHEAST 5 TO 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 5 MPH.  
MIXING HEIGHT.......2700-4700 FT AGL.  
SMOKE DISPERSAL.....POOR (17500-24900 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY. CHANCE OF SNOW. PATCHY FOG AFTER 0100.  
MIN TEMPERATURE.....17-22.  
24 HR TREND......2 DEGREES WARMER.  
MAX HUMIDITY........85-91 PERCENT.  
24 HR TREND......4 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTHEAST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.15 PERCENT.  
TRANSPORT WINDS.....EAST 10 TO 15 MPH.  
MIXING HEIGHT.......1800-3800 FT AGL.  
SMOKE DISPERSAL.....POOR (27200-32100 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF LIGHT FREEZING  
RAIN UNTIL 0700. CHANCE OF SNOW. SLIGHT CHANCE  
OF LIGHT FREEZING RAIN AFTER 0900 UNTIL 1600.  
PATCHY BLOWING SNOW AFTER 1700.  
MAX TEMPERATURE.....26-32.  
24 HR TREND......2 DEGREES COOLER.  
MIN HUMIDITY........68-74 PERCENT.  
24 HR TREND......29 PERCENT WETTER.  
20-FOOT WINDS.......EAST 10 TO 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.20 PERCENT.  
TRANSPORT WINDS.....SOUTHEAST AROUND 20 MPH.  
MIXING HEIGHT.......1700-3200 FT AGL.  
SMOKE DISPERSAL.....POOR TO FAIR (34500-46400 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
PATCHY BLOWING SNOW. SNOW AND CHANCE OF LIGHT  
FREEZING RAIN. LOWS IN THE MID 20S. HIGHS IN THE LOWER 30S. EAST  
WINDS AROUND 15 MPH.    
FRIDAY
 
SNOW LIKELY. LOWS IN THE MID 20S. HIGHS IN THE LOWER  
30S. NORTH WINDS AROUND 10 MPH.    
SATURDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW. LOWS AROUND 19.  
HIGHS IN THE MID 30S. NORTHWEST WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLEAR. LOWS AROUND 19. HIGHS IN THE LOWER 40S.    
MONDAY
 
PARTLY CLOUDY WITH CHANCE OF SNOW AND SLIGHT CHANCE OF  
RAIN. LOWS IN THE MID 20S. HIGHS IN THE LOWER 40S.  
 

 
 
WYZ303-132215-  
CENTRAL AND NORTHERN CARBON/FERRIS-SEMINOE-SHIRLEY MOUNTAINS-  
356 AM MDT TUE APR 13 2021  
 
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO  
NOON MDT WEDNESDAY...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF FLURRIES UNTIL 1200,  
THEN SLIGHT CHANCE OF SNOW UNTIL 1500, THEN  
CHANCE OF SNOW.  
MAX TEMPERATURE.....34-40.  
24 HR TREND......UNCHANGED.  
MIN HUMIDITY........35-41 PERCENT.  
24 HR TREND......8 PERCENT WETTER.  
20-FOOT WINDS.......NORTHEAST 10 TO 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....EAST AROUND 15 MPH.  
MIXING HEIGHT.......2900-4900 FT AGL.  
SMOKE DISPERSAL.....FAIR TO GOOD (40700-64400 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SNOW UNTIL 2400, THEN  
SNOW LIKELY. PATCHY BLOWING SNOW AFTER 0100.  
PATCHY FOG AFTER 0300 UNTIL 0500. SNOW  
ACCUMULATION UP TO 3 INCHES.  
MIN TEMPERATURE.....21-26.  
24 HR TREND......4 DEGREES WARMER.  
MAX HUMIDITY........83-89 PERCENT.  
24 HR TREND......14 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......EAST 15 TO 20 MPH WITH GUSTS TO AROUND 35 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.30 PERCENT.  
TRANSPORT WINDS.....EAST 25 TO 30 MPH.  
MIXING HEIGHT.......1900-3500 FT AGL.  
SMOKE DISPERSAL.....FAIR TO GOOD (58500-60600 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. PATCHY BLOWING SNOW UNTIL 1000.  
CHANCE OF SNOW AND LIGHT FREEZING RAIN. SLIGHT  
CHANCE OF RAIN AFTER 1200.  
MAX TEMPERATURE.....34-42.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........56-62 PERCENT.  
24 HR TREND......20 PERCENT WETTER.  
20-FOOT WINDS.......EAST AROUND 15 MPH WITH GUSTS TO AROUND 35 MPH.  
LAL.................1 UNTIL 1200, THEN 2.  
CHC OF WETTING RAIN.25 PERCENT.  
TRANSPORT WINDS.....EAST AROUND 25 MPH.  
MIXING HEIGHT.......1600-3600 FT AGL.  
SMOKE DISPERSAL.....FAIR TO GOOD (47800-61400 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
PATCHY BLOWING SNOW IN THE EVENING. CLOUDY WITH SNOW  
LIKELY AND SLIGHT CHANCE OF FREEZING RAIN. LOWS IN THE UPPER 20S.  
HIGHS IN THE MID 30S. NORTHEAST WINDS AROUND 15 MPH.    
FRIDAY
 
CLOUDY WITH CHANCE OF SNOW. LOWS IN THE MID 20S. HIGHS  
IN THE MID 30S. NORTHEAST WINDS AROUND 10 MPH.    
SATURDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SNOW. LOWS AROUND 20.  
HIGHS IN THE UPPER 30S. NORTH WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLEAR. LOWS AROUND 20. HIGHS IN THE MID 40S.    
MONDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN AND SNOW. LOWS  
IN THE UPPER 20S. HIGHS IN THE UPPER 40S.  
 

 
 
WYZ304-132215-  
SOUTHWEST CARBON COUNTY-  
356 AM MDT TUE APR 13 2021  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 0900, THEN PARTLY CLOUDY  
UNTIL 1200, THEN MOSTLY CLOUDY. CHANCE OF  
SPRINKLES AND FLURRIES UNTIL 1200, THEN CHANCE  
OF RAIN AND SNOW.  
MAX TEMPERATURE.....43-48.  
24 HR TREND......UNCHANGED.  
MIN HUMIDITY........28-34 PERCENT.  
24 HR TREND......13 PERCENT WETTER.  
20-FOOT WINDS.......NORTHEAST AROUND 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.10 PERCENT.  
TRANSPORT WINDS.....NORTHEAST 15 TO 20 MPH.  
MIXING HEIGHT.......2100-2600 FT AGL INCREASING TO 5600-6600 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....FAIR TO GOOD (44400-90600 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY. RAIN LIKELY UNTIL 1900. SNOW  
LIKELY. SNOW ACCUMULATION AROUND 1 INCH.  
MIN TEMPERATURE.....26-32.  
24 HR TREND......7 DEGREES WARMER.  
MAX HUMIDITY........84-90 PERCENT.  
24 HR TREND......23 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTHEAST 15 TO 20 MPH WITH GUSTS TO AROUND 35  
MPH.  
LAL.................1.  
CHC OF WETTING RAIN.45 PERCENT.  
TRANSPORT WINDS.....EAST 25 TO 30 MPH.  
MIXING HEIGHT.......1700-2600 FT AGL.  
SMOKE DISPERSAL.....FAIR (45600-55800 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 1200, THEN PARTLY CLOUDY  
UNTIL 1500, THEN MOSTLY CLOUDY. CHANCE OF LIGHT  
FREEZING RAIN UNTIL 1200. CHANCE OF RAIN AND  
SNOW. SLIGHT CHANCE OF THUNDERSTORMS AFTER  
1200.  
MAX TEMPERATURE.....47-55.  
24 HR TREND......8 DEGREES WARMER.  
MIN HUMIDITY........44-50 PERCENT.  
24 HR TREND......11 PERCENT WETTER.  
20-FOOT WINDS.......NORTHEAST AROUND 10 MPH WITH HIGHER GUSTS.  
LAL.................1 UNTIL 1200, THEN 2.  
CHC OF WETTING RAIN.25 PERCENT.  
TRANSPORT WINDS.....SOUTHEAST 15 TO 20 MPH.  
MIXING HEIGHT.......1200-1700 FT AGL INCREASING TO 7800-9800 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (19700 KNOT-FT) INCREASING TO VERY GOOD  
(140800 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
COLDER. MOSTLY CLOUDY WITH SNOW, RAIN LIKELY, SLIGHT  
CHANCE OF THUNDERSTORMS AND LIGHT FREEZING RAIN. LOWS IN THE  
UPPER 20S. HIGHS IN THE LOWER 40S. NORTH WINDS AROUND 10 MPH.    
FRIDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW. LOWS IN THE MID 20S.  
HIGHS IN THE LOWER 40S. NORTHEAST WINDS AROUND 15 MPH.    
SATURDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW. LOWS IN THE  
LOWER 20S. HIGHS IN THE LOWER 40S. NORTHEAST WINDS AROUND 15 MPH.   
SUNDAY
 
MOSTLY CLEAR. LOWS AROUND 20. HIGHS AROUND 50.    
MONDAY
 
MOSTLY CLEAR. SLIGHT CHANCE OF RAIN. LOWS IN THE UPPER  
20S. HIGHS IN THE MID 50S.  
 

 
 
WYZ305-132215-  
SIERRA MADRE RANGE/MEDICINE BOW NF-  
356 AM MDT TUE APR 13 2021  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF FLURRIES UNTIL 1200.  
CHANCE OF SPRINKLES AFTER 1000 UNTIL 1200, THEN  
CHANCE OF SNOW.  
MAX TEMPERATURE.....36-44.  
24 HR TREND......4 DEGREES COOLER.  
MIN HUMIDITY........40-46 PERCENT.  
24 HR TREND......19 PERCENT WETTER.  
20-FOOT WINDS.......EAST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.10 PERCENT.  
TRANSPORT WINDS.....SOUTHEAST AROUND 10 MPH.  
MIXING HEIGHT.......1400-2400 FT AGL INCREASING TO 4400-6400 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR TO FAIR (19700-54500 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY. SNOW LIKELY UNTIL 2400, THEN  
SNOW. SNOW ACCUMULATION OF 2 TO 5 INCHES.  
MIN TEMPERATURE.....23-29.  
24 HR TREND......8 DEGREES WARMER.  
MAX HUMIDITY........77-83 PERCENT.  
24 HR TREND......10 PERCENT WETTER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......EAST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.60 PERCENT.  
TRANSPORT WINDS.....EAST 20 TO 25 MPH.  
MIXING HEIGHT.......1200-2100 FT AGL.  
SMOKE DISPERSAL.....POOR (26500-35800 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 1500, THEN MOSTLY CLOUDY.  
CHANCE OF SNOW, RAIN AND LIGHT FREEZING RAIN  
UNTIL 1200, THEN RAIN, SNOW LIKELY AND SLIGHT  
CHANCE OF THUNDERSTORMS. LITTLE OR NO SNOW  
ACCUMULATION.  
MAX TEMPERATURE.....43-51.  
24 HR TREND......7 DEGREES WARMER.  
MIN HUMIDITY........44-50 PERCENT.  
24 HR TREND......1 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHEAST AROUND 10 MPH AND GUSTY.  
LAL.................1 UNTIL 1200, THEN 2.  
CHC OF WETTING RAIN.30 PERCENT.  
TRANSPORT WINDS.....SOUTH 15 TO 20 MPH.  
MIXING HEIGHT.......1300-2000 FT AGL INCREASING TO 8200-10200 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (20900 KNOT-FT) INCREASING TO VERY GOOD  
(143900 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
MOSTLY CLOUDY WITH SNOW, RAIN LIKELY, SLIGHT CHANCE  
OF THUNDERSTORMS AND LIGHT FREEZING RAIN. LOWS AROUND 30. HIGHS  
IN THE UPPER 30S. SOUTH WINDS AROUND 10 MPH.    
FRIDAY
 
CLOUDY WITH CHANCE OF SNOW. LOWS IN THE MID 20S. HIGHS  
IN THE MID 30S. NORTHEAST WINDS AROUND 10 MPH.    
SATURDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SNOW. LOWS AROUND 19.  
HIGHS IN THE UPPER 30S. NORTHEAST WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLEAR. LOWS AROUND 18. HIGHS IN THE MID 40S.    
MONDAY
 
MOSTLY CLEAR WITH CHANCE OF SNOW AND SLIGHT CHANCE OF  
RAIN. LOWS IN THE MID 20S. HIGHS IN THE UPPER 40S.  
 

 
 
WYZ306-132215-  
UPPER NORTH PLATTE RIVER BASIN-  
356 AM MDT TUE APR 13 2021  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 0900, THEN PARTLY CLOUDY  
UNTIL 1200, THEN MOSTLY CLOUDY. CHANCE OF  
SPRINKLES AND FLURRIES UNTIL 1200, THEN CHANCE  
OF SNOW.  
MAX TEMPERATURE.....40-45.  
24 HR TREND......3 DEGREES WARMER.  
MIN HUMIDITY........33-39 PERCENT.  
24 HR TREND......9 PERCENT WETTER.  
20-FOOT WINDS.......EAST 5 TO 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....EAST AROUND 10 MPH.  
MIXING HEIGHT.......2800-3400 FT AGL INCREASING TO 4900-6700 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR TO FAIR (28600-47600 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SNOW UNTIL 2400, THEN  
SNOW LIKELY. SNOW ACCUMULATION OF 1 TO 3  
INCHES.  
MIN TEMPERATURE.....24-29.  
24 HR TREND......6 DEGREES WARMER.  
MAX HUMIDITY........75-81 PERCENT.  
24 HR TREND......10 PERCENT WETTER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......EAST AROUND 10 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.40 PERCENT.  
TRANSPORT WINDS.....EAST AROUND 20 MPH INCREASING TO AROUND 30 MPH  
AFTER MIDNIGHT.  
MIXING HEIGHT.......2000-2800 FT AGL.  
SMOKE DISPERSAL.....POOR TO FAIR (39600-54800 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 1500, THEN MOSTLY CLOUDY.  
SLIGHT CHANCE OF LIGHT FREEZING RAIN UNTIL  
1200. CHANCE OF SNOW. CHANCE OF RAIN AFTER  
1200.  
MAX TEMPERATURE.....46-51.  
24 HR TREND......5 DEGREES WARMER.  
MIN HUMIDITY........41-47 PERCENT.  
24 HR TREND......11 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHEAST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.15 PERCENT.  
TRANSPORT WINDS.....SOUTHEAST 15 TO 20 MPH.  
MIXING HEIGHT.......1700-2200 FT AGL INCREASING TO 4800-6800 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR TO GOOD (29000-77900 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
MOSTLY CLOUDY WITH SNOW LIKELY WITH POSSIBLE RAIN AND  
THUNDERSTORMS. LOWS AROUND 30. HIGHS AROUND 40. EAST WINDS AROUND  
10 MPH.    
FRIDAY
 
CLOUDY WITH CHANCE OF SNOW. LOWS IN THE MID 20S. HIGHS  
IN THE UPPER 30S. NORTHEAST WINDS AROUND 10 MPH.    
SATURDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SNOW. LOWS AROUND 20.  
HIGHS AROUND 40. NORTH WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLEAR. LOWS AROUND 20. HIGHS IN THE UPPER 40S.    
MONDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN AND SNOW. LOWS  
IN THE MID 20S. HIGHS AROUND 50.  
 

 
 
WYZ307-132215-  
SNOWY RANGE/MEDICINE BOW NF-  
356 AM MDT TUE APR 13 2021  
 
...WINTER STORM WARNING IN EFFECT FROM 6 PM WEDNESDAY TO 6 PM MDT  
FRIDAY...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW UNTIL  
1200, THEN CHANCE OF SNOW.  
MAX TEMPERATURE.....28-36.  
24 HR TREND......4 DEGREES COOLER.  
MIN HUMIDITY........50-56 PERCENT.  
24 HR TREND......15 PERCENT WETTER.  
20-FOOT WINDS.......EAST 5 TO 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.10 PERCENT.  
TRANSPORT WINDS.....SOUTHEAST AROUND 10 MPH.  
MIXING HEIGHT.......1300-2400 FT AGL INCREASING TO 2400-4400 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (19100-32100 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY. SNOW LIKELY UNTIL 2400SNOW AFTER  
2400. PATCHY BLOWING SNOW AFTER 2200. SNOW  
ACCUMULATION OF 2 TO 7 INCHES.  
MIN TEMPERATURE.....17-23.  
24 HR TREND......2 DEGREES WARMER.  
MAX HUMIDITY........79-85 PERCENT.  
24 HR TREND......7 PERCENT WETTER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......EAST 10 TO 15 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.55 PERCENT.  
TRANSPORT WINDS.....EAST AROUND 20 MPH INCREASING TO SOUTHEAST  
AROUND 30 MPH AFTER MIDNIGHT.  
MIXING HEIGHT.......1100-2200 FT AGL.  
SMOKE DISPERSAL.....POOR TO FAIR (28000-45900 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 0900, THEN PARTLY CLOUDY.  
CHANCE OF SNOW AND SLIGHT CHANCE OF LIGHT  
FREEZING RAIN. CHANCE OF RAIN AFTER 1200.  
MAX TEMPERATURE.....33-43.  
24 HR TREND......6 DEGREES WARMER.  
MIN HUMIDITY........52-58 PERCENT.  
24 HR TREND......10 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHEAST 10 TO 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.20 PERCENT.  
TRANSPORT WINDS.....SOUTHEAST 15 TO 20 MPH.  
MIXING HEIGHT.......900-1700 FT AGL INCREASING TO 2200-4200 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR TO FAIR (20100-46700 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
MOSTLY CLOUDY WITH SNOW, SLIGHT CHANCE OF  
THUNDERSTORMS AND LIGHT FREEZING RAIN. LOWS IN THE MID 20S. HIGHS  
IN THE MID 30S. SOUTHEAST WINDS AROUND 10 MPH.    
FRIDAY
 
CLOUDY WITH SNOW LIKELY. LOWS IN THE LOWER 20S. HIGHS  
IN THE LOWER 30S. NORTHEAST WINDS AROUND 10 MPH.    
SATURDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW. LOWS AROUND 15.  
HIGHS IN THE LOWER 30S. NORTHEAST WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLEAR. LOWS AROUND 15. HIGHS AROUND 40.    
MONDAY
 
PARTLY CLOUDY WITH CHANCE OF SNOW. LOWS IN THE LOWER  
20S. HIGHS IN THE LOWER 40S.  
 

 
 
WYZ308-132215-  
LARAMIE VALLEY/SHIRLEY BASIN-  
356 AM MDT TUE APR 13 2021  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF FLURRIES UNTIL 1500,  
THEN CHANCE OF SNOW.  
MAX TEMPERATURE.....32-37.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........41-47 PERCENT.  
24 HR TREND......7 PERCENT WETTER.  
20-FOOT WINDS.......EAST 10 TO 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....EAST AROUND 10 MPH.  
MIXING HEIGHT.......3000-4800 FT AGL.  
SMOKE DISPERSAL.....POOR TO FAIR (32200-43200 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SNOW UNTIL 2400, THEN  
SNOW LIKELY. PATCHY BLOWING SNOW AFTER 0100.  
PATCHY FOG AFTER 0200 UNTIL 0500. SNOW  
ACCUMULATION UP TO 4 INCHES.  
MIN TEMPERATURE.....19-24.  
24 HR TREND......5 DEGREES WARMER.  
MAX HUMIDITY........82-88 PERCENT.  
24 HR TREND......11 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......EAST AROUND 15 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.35 PERCENT.  
TRANSPORT WINDS.....EAST 20 TO 25 MPH.  
MIXING HEIGHT.......2000-3100 FT AGL.  
SMOKE DISPERSAL.....FAIR (46900-48800 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SNOW AND SLIGHT CHANCE  
OF LIGHT FREEZING RAIN. SLIGHT CHANCE OF RAIN  
AFTER 1200. PATCHY BLOWING SNOW AFTER 0900  
UNTIL 1500.  
MAX TEMPERATURE.....31-36.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........58-64 PERCENT.  
24 HR TREND......16 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHEAST 15 TO 20 MPH. GUSTS UP TO 30 MPH  
INCREASING TO 40 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.15 PERCENT.  
TRANSPORT WINDS.....SOUTHEAST AROUND 25 MPH.  
MIXING HEIGHT.......2200-2900 FT AGL.  
SMOKE DISPERSAL.....FAIR (52100-56200 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
PATCHY BLOWING SNOW. CLOUDY WITH SNOW, SLIGHT CHANCE  
OF THUNDERSTORMS AND LIGHT FREEZING RAIN. LOWS IN THE UPPER 20S.  
HIGHS IN THE MID 30S. SOUTHEAST WINDS AROUND 15 MPH.    
FRIDAY
 
SNOW LIKELY. LOWS IN THE MID 20S. HIGHS IN THE MID 30S.  
NORTHEAST WINDS AROUND 10 MPH.    
SATURDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW. LOWS AROUND 18.  
HIGHS IN THE MID 30S. NORTH WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLEAR. LOWS AROUND 17. HIGHS IN THE MID 40S.    
MONDAY
 
PARTLY CLOUDY WITH CHANCE OF RAIN AND SNOW. LOWS IN THE  
MID 20S. HIGHS IN THE UPPER 40S.  
 

 
 
WYZ309-132215-  
SOUTH LARAMIE RANGE/MEDICINE BOW NF-  
356 AM MDT TUE APR 13 2021  
 
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM WEDNESDAY TO 6 PM  
MDT FRIDAY...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF FLURRIES UNTIL  
1200SLIGHT CHANCE OF SNOW AFTER 1200 UNTIL  
1500, THEN CHANCE OF SNOW.  
MAX TEMPERATURE.....31-37.  
24 HR TREND......2 DEGREES COOLER.  
MIN HUMIDITY........43-49 PERCENT.  
24 HR TREND......7 PERCENT WETTER.  
20-FOOT WINDS.......EAST 5 TO 10 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....EAST AROUND 10 MPH.  
MIXING HEIGHT.......2900-4900 FT AGL.  
SMOKE DISPERSAL.....POOR (27500-31100 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY. CHANCE OF SNOW UNTIL 2400, THEN SNOW  
LIKELY. PATCHY BLOWING SNOW AFTER 2400. PATCHY  
FOG AFTER 0300. SNOW ACCUMULATION OF 1 TO 4  
INCHES.  
MIN TEMPERATURE.....20-25.  
24 HR TREND......5 DEGREES WARMER.  
MAX HUMIDITY........82-88 PERCENT.  
24 HR TREND......11 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......EAST 10 TO 15 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.35 PERCENT.  
TRANSPORT WINDS.....EAST 15 TO 20 MPH.  
MIXING HEIGHT.......2000-3800 FT AGL.  
SMOKE DISPERSAL.....POOR TO FAIR (36900-40800 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF LIGHT FREEZING RAIN  
UNTIL 1200. CHANCE OF SNOW. SLIGHT CHANCE OF  
RAIN AND LIGHT FREEZING RAIN AFTER 1200. PATCHY  
BLOWING SNOW AFTER 0700.  
MAX TEMPERATURE.....30-35.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........68-74 PERCENT.  
24 HR TREND......25 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHEAST AROUND 15 MPH WITH GUSTS TO AROUND 35  
MPH.  
LAL.................1.  
CHC OF WETTING RAIN.20 PERCENT.  
TRANSPORT WINDS.....SOUTHEAST AROUND 20 MPH.  
MIXING HEIGHT.......1900-3600 FT AGL.  
SMOKE DISPERSAL.....FAIR (40000-51300 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
PATCHY BLOWING SNOW. CLOUDY WITH SNOW AND CHANCE OF  
LIGHT FREEZING RAIN. LOWS IN THE UPPER 20S. HIGHS IN THE LOWER  
30S. SOUTHEAST WINDS AROUND 15 MPH.    
FRIDAY
 
SNOW LIKELY. LOWS IN THE MID 20S. HIGHS IN THE LOWER  
30S. NORTHEAST WINDS AROUND 10 MPH.    
SATURDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW. LOWS AROUND 19.  
HIGHS IN THE MID 30S. NORTH WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLEAR. SLIGHT CHANCE OF SNOW. LOWS IN THE LOWER  
20S. HIGHS IN THE MID 40S.    
MONDAY
 
PARTLY CLOUDY WITH CHANCE OF RAIN AND SNOW. LOWS IN THE  
MID 20S. HIGHS IN THE MID 40S.  
 

 
 
WYZ310-132215-  
PLATTE/GOSHEN/CENTRAL AND EASTERN LARAMIE-  
356 AM MDT TUE APR 13 2021  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF FLURRIES UNTIL  
1200CHANCE OF SPRINKLES AND SLIGHT CHANCE OF  
SNOW AFTER 1500.  
MAX TEMPERATURE.....38-43.  
24 HR TREND......2 DEGREES COOLER.  
MIN HUMIDITY........30-36 PERCENT.  
24 HR TREND......4 PERCENT WETTER.  
20-FOOT WINDS.......NORTH AROUND 10 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.  
MIXING HEIGHT.......3800-4300 FT AGL INCREASING TO 5200-6300 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (31400-39900 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SPRINKLES AND SLIGHT  
CHANCE OF SNOW UNTIL 2100, THEN CHANCE OF  
FLURRIES UNTIL 2400, THEN CHANCE OF SNOW.  
MIN TEMPERATURE.....23-28.  
24 HR TREND......1 DEGREE COOLER.  
MAX HUMIDITY........77-83 PERCENT.  
24 HR TREND......16 PERCENT WETTER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......NORTHEAST AROUND 10 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.15 PERCENT.  
TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.  
MIXING HEIGHT.......3900-5100 FT AGL DECREASING TO 2400-2900 FT AGL  
AFTER MIDNIGHT.  
SMOKE DISPERSAL.....POOR (31900-33200 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........CLOUDY. CHANCE OF SNOW UNTIL 1200. SLIGHT  
CHANCE OF LIGHT FREEZING RAIN. SLIGHT CHANCE OF  
RAIN AND SNOW AFTER 1200.  
MAX TEMPERATURE.....36-41.  
24 HR TREND......UNCHANGED.  
MIN HUMIDITY........56-62 PERCENT.  
24 HR TREND......22 PERCENT WETTER.  
20-FOOT WINDS.......EAST 10 TO 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.15 PERCENT.  
TRANSPORT WINDS.....SOUTHEAST AROUND 15 MPH.  
MIXING HEIGHT.......2500-4500 FT AGL.  
SMOKE DISPERSAL.....POOR TO GOOD (31900-60700 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
CLOUDY WITH SNOW, RAIN LIKELY AND SLIGHT CHANCE OF  
LIGHT FREEZING RAIN. LOWS AROUND 30. HIGHS IN THE MID 30S. EAST  
WINDS AROUND 15 MPH.    
FRIDAY
 
CLOUDY WITH SNOW AND RAIN LIKELY. LOWS IN THE UPPER  
20S. HIGHS IN THE UPPER 30S. NORTH WINDS AROUND 10 MPH.    
SATURDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SNOW. LOWS IN THE  
LOWER 20S. HIGHS IN THE LOWER 40S. NORTHWEST WINDS AROUND 10 MPH.   
SUNDAY
 
MOSTLY CLEAR. LOWS IN THE LOWER 20S. HIGHS IN THE UPPER  
40S.    
MONDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN AND SNOW. LOWS  
IN THE UPPER 20S. HIGHS IN THE LOWER 50S.  
 

 
 
NEZ311-132215-  
PINE RIDGE/NEBRASKA NATIONAL FOREST/OGLALA NATIONAL GRASSLANDS-  
356 AM MDT TUE APR 13 2021  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....41-46.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........25-31 PERCENT.  
24 HR TREND......2 PERCENT WETTER.  
20-FOOT WINDS.......NORTHWEST AROUND 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 25 MPH DECREASING TO AROUND 15  
MPH IN THE AFTERNOON.  
MIXING HEIGHT.......3500-4300 FT AGL INCREASING TO 5800-6400 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (79800-82700 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 0300, THEN MOSTLY CLOUDY.  
CHANCE OF FLURRIES AFTER 2400.  
MIN TEMPERATURE.....22-27.  
24 HR TREND......2 DEGREES WARMER.  
MAX HUMIDITY........66-72 PERCENT.  
24 HR TREND......3 PERCENT DRIER.  
HUMIDITY RECOVERY...FAIR.  
20-FOOT WINDS.......NORTH 5 TO 10 MPH. GUSTS UP TO 25 MPH  
DECREASING TO 15 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 10 MPH SHIFTING TO THE NORTHEAST  
AFTER MIDNIGHT.  
MIXING HEIGHT.......2000-4000 FT AGL.  
SMOKE DISPERSAL.....POOR (20200-35400 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF FLURRIES UNTIL 1400.  
CHANCE OF SPRINKLES AFTER 1200.  
MAX TEMPERATURE.....39-44.  
24 HR TREND......3 DEGREES COOLER.  
MIN HUMIDITY........38-44 PERCENT.  
24 HR TREND......11 PERCENT WETTER.  
20-FOOT WINDS.......NORTHEAST 5 TO 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....EAST AROUND 10 MPH.  
MIXING HEIGHT.......2500-4500 FT AGL.  
SMOKE DISPERSAL.....POOR (19000-37600 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
CLOUDY WITH SNOW, RAIN LIKELY AND SLIGHT CHANCE OF  
LIGHT FREEZING RAIN. LOWS IN THE UPPER 20S. HIGHS IN THE MID 30S.  
EAST WINDS AROUND 10 MPH.    
FRIDAY
 
CLOUDY WITH SNOW AND RAIN LIKELY. LOWS IN THE UPPER  
20S. HIGHS IN THE UPPER 30S. NORTHEAST WINDS AROUND 10 MPH.    
SATURDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SNOW AND RAIN. LOWS  
IN THE MID 20S. HIGHS IN THE LOWER 40S. NORTHWEST WINDS AROUND  
10 MPH.    
SUNDAY
 
MOSTLY CLEAR. LOWS IN THE MID 20S. HIGHS IN THE LOWER  
50S.    
MONDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN. LOWS IN THE  
UPPER 20S. HIGHS IN THE LOWER 50S.  
 

 
 
NEZ312-132215-  
BOX BUTTE/SOUTH SIOUX-  
356 AM MDT TUE APR 13 2021  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....41-46.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........23-29 PERCENT.  
24 HR TREND......2 PERCENT WETTER.  
20-FOOT WINDS.......NORTHWEST AROUND 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 20 MPH DECREASING TO AROUND 10  
MPH IN THE AFTERNOON.  
MIXING HEIGHT.......3300-3800 FT AGL INCREASING TO 6300-6800 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (63700-64000 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 0300, THEN CLOUDY. CHANCE  
OF SPRINKLES UNTIL 2200CHANCE OF FLURRIES AFTER  
2200.  
MIN TEMPERATURE.....22-27.  
24 HR TREND......4 DEGREES WARMER.  
MAX HUMIDITY........68-74 PERCENT.  
24 HR TREND......3 PERCENT DRIER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......NORTH AROUND 10 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.  
MIXING HEIGHT.......3700-4800 FT AGL DECREASING TO 1800-2300 FT AGL  
AFTER MIDNIGHT.  
SMOKE DISPERSAL.....POOR (24700-36200 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SNOW UNTIL 1200, THEN  
CHANCE OF FLURRIES UNTIL 1400. CHANCE OF  
SPRINKLES AFTER 1200.  
MAX TEMPERATURE.....40-45.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........40-46 PERCENT.  
24 HR TREND......23 PERCENT WETTER.  
20-FOOT WINDS.......NORTHEAST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....EAST AROUND 10 MPH.  
MIXING HEIGHT.......2300-2800 FT AGL INCREASING TO 4700-5300 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR TO FAIR (22500-51400 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
CLOUDY WITH SNOW, RAIN LIKELY AND SLIGHT CHANCE OF  
LIGHT FREEZING RAIN. CHANCE OF SPRINKLES IN THE EVENING. PATCHY  
BLOWING SNOW. LOWS AROUND 30. HIGHS IN THE MID 30S. EAST WINDS  
AROUND 15 MPH.    
FRIDAY
 
CLOUDY WITH SNOW AND RAIN LIKELY. LOWS IN THE UPPER  
20S. HIGHS IN THE UPPER 30S. NORTHEAST WINDS AROUND 10 MPH.    
SATURDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SNOW. LOWS IN THE MID  
20S. HIGHS IN THE LOWER 40S. NORTH WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLEAR. LOWS IN THE LOWER 20S. HIGHS IN THE LOWER  
50S.    
MONDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN. LOWS IN THE  
UPPER 20S. HIGHS IN THE LOWER 50S.  
 

 
 
NEZ313-132215-  
SCOTTS BLUFF NATIONAL MONUMENT/WILDCAT HILLS-  
356 AM MDT TUE APR 13 2021  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MAX TEMPERATURE.....42-47.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........25-31 PERCENT.  
24 HR TREND......3 PERCENT WETTER.  
20-FOOT WINDS.......NORTHWEST AROUND 10 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.  
MIXING HEIGHT.......3400-4000 FT AGL INCREASING TO 5800-6600 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....FAIR (42600-46000 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 2400, THEN MOSTLY CLOUDY.  
CHANCE OF SPRINKLES AND FLURRIES UNTIL 2400,  
THEN CHANCE OF SNOW.  
MIN TEMPERATURE.....24-29.  
24 HR TREND......2 DEGREES WARMER.  
MAX HUMIDITY........72-78 PERCENT.  
24 HR TREND......6 PERCENT WETTER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......NORTHEAST AROUND 10 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 5 MPH INCREASING TO NORTHEAST  
AROUND 15 MPH AFTER MIDNIGHT.  
MIXING HEIGHT.......3400-4800 FT AGL DECREASING TO 1700-2800 FT AGL  
AFTER MIDNIGHT.  
SMOKE DISPERSAL.....POOR (25600-28500 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........CLOUDY. CHANCE OF SNOW AND SLIGHT CHANCE OF  
LIGHT FREEZING RAIN UNTIL 1200, THEN CHANCE OF  
SPRINKLES AND FLURRIES.  
MAX TEMPERATURE.....39-44.  
24 HR TREND......5 DEGREES COOLER.  
MIN HUMIDITY........49-55 PERCENT.  
24 HR TREND......29 PERCENT WETTER.  
20-FOOT WINDS.......EAST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.10 PERCENT.  
TRANSPORT WINDS.....EAST AROUND 15 MPH.  
MIXING HEIGHT.......2000-2600 FT AGL INCREASING TO 4000-5300 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR TO FAIR (25700-53200 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
CLOUDY WITH SNOW, RAIN LIKELY AND SLIGHT CHANCE OF  
LIGHT FREEZING RAIN. LOWS IN THE LOWER 30S. HIGHS IN THE MID 30S.  
EAST WINDS AROUND 15 MPH.    
FRIDAY
 
SNOW AND RAIN. LOWS IN THE UPPER 20S. HIGHS IN THE  
UPPER 30S. NORTHEAST WINDS AROUND 10 MPH.    
SATURDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW. LOWS IN THE MID  
20S. HIGHS IN THE LOWER 40S. NORTH WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLEAR. LOWS IN THE LOWER 20S. HIGHS IN THE LOWER  
50S.    
MONDAY
 
MOSTLY CLEAR WITH SLIGHT CHANCE OF RAIN. LOWS IN THE  
UPPER 20S. HIGHS IN THE MID 50S.  
 

 
 
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