424  
FNUS55 KCYS 202117  
FWFCYS  
 
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST WYOMING/WESTERN NEBRASKA  
NATIONAL WEATHER SERVICE CHEYENNE WY  
317 PM MDT WED OCT 20 2021  
   
DISCUSSION
 
 
LESSENED FIRE WEATHER CONCERNS DUE TO THE RECENT PRECIPITATION AND  
COOLER TEMPERATURES. BREEZY CONDITIONS ARE EXPECTED ON THURSDAY,  
BUT HUMIDITY IS EXPECTED TO REMAIN HIGH. COULD BE A LITTLE DRIER  
ON FRIDAY ESPECIALLY CLOSER TO CO WITH BREEZY CONDITIONS POSSIBLE  
IN CARBON COUNTY BUT GENERALLY LIGHTER THAN THURSDAY FOR MOST  
LOCATIONS. WINDS MAY INCREASE AGAIN ON SATURDAY AS MOISTURE STARTS  
TO WORK IN FROM THE WEST AGAIN.  
 
WYZ301-211015-  
NIOBRARA/LOWER ELEVATIONS OF CONVERSE/THUNDER BASIN NATIONAL  
GRASSLAND-  
317 PM MDT WED OCT 20 2021  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. PATCHY FOG AFTER 0100.  
MIN TEMPERATURE.....32-37.  
24 HR TREND......5 DEGREES WARMER.  
MAX HUMIDITY........90-96 PERCENT.  
24 HR TREND......UNCHANGED.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH.  
MIXING HEIGHT.......300-900 FT AGL.  
SMOKE DISPERSAL.....POOR (6500-8700 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 1500, THEN MOSTLY SUNNY.  
PATCHY FOG UNTIL 0900.  
MAX TEMPERATURE.....56-61.  
24 HR TREND......14 DEGREES WARMER.  
MIN HUMIDITY........39-45 PERCENT.  
24 HR TREND......24 PERCENT DRIER.  
20-FOOT WINDS.......WEST AROUND 10 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 15 TO 20 MPH.  
MIXING HEIGHT.......700 FT AGL INCREASING TO 4900-6200 FT AGL IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (10800 KNOT-FT) INCREASING TO GOOD (75700  
KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY NIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....32-37.  
24 HR TREND......1 DEGREE WARMER.  
MAX HUMIDITY........89-95 PERCENT.  
24 HR TREND......UNCHANGED.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......WEST AROUND 10 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 10 MPH.  
MIXING HEIGHT.......500 FT AGL.  
SMOKE DISPERSAL.....POOR (4000-4100 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....59-64.  
24 HR TREND......2 DEGREES WARMER.  
MIN HUMIDITY........35-41 PERCENT.  
24 HR TREND......5 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH.  
MIXING HEIGHT.......500 FT AGL INCREASING TO 2400-3300 FT AGL IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (4100-23700 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
PARTLY CLOUDY. LOWS IN THE UPPER 30S. HIGHS AROUND  
60. SOUTHWEST WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN. LOWS IN THE UPPER  
30S. HIGHS IN THE MID 50S. WEST WINDS AROUND 10 MPH.    
MONDAY
 
WARMER. PARTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN  
THE UPPER 60S. SOUTHWEST WINDS AROUND 10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN. LOWS IN THE  
UPPER 30S. HIGHS IN THE UPPER 50S.    
WEDNESDAY
 
PARTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN THE MID  
50S.  
 

 
 
WYZ302-211015-  
NORTH LARAMIE RANGE/MEDICINE BOW NF-  
317 PM MDT WED OCT 20 2021  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MIN TEMPERATURE.....31-39.  
24 HR TREND......13 DEGREES WARMER.  
MAX HUMIDITY........74-80 PERCENT.  
24 HR TREND......27 PERCENT DRIER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......WEST 15 TO 20 MPH WITH GUSTS TO AROUND 35 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 25 MPH.  
MIXING HEIGHT.......400-1100 FT AGL.  
SMOKE DISPERSAL.....POOR (15200-17300 KNOT-FT).  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
THURSDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 1200, THEN MOSTLY SUNNY.  
MAX TEMPERATURE.....47-55.  
24 HR TREND......6 DEGREES WARMER.  
MIN HUMIDITY........42-48 PERCENT.  
24 HR TREND......18 PERCENT DRIER.  
20-FOOT WINDS.......WEST AROUND 15 MPH WITH GUSTS TO AROUND 35 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 25 MPH.  
MIXING HEIGHT.......700-1200 FT AGL INCREASING TO 4100-5600 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (19600 KNOT-FT) INCREASING TO VERY GOOD  
(111100 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY NIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....31-39.  
24 HR TREND......8 DEGREES COOLER.  
MAX HUMIDITY........68-74 PERCENT.  
24 HR TREND......6 PERCENT DRIER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......WEST AROUND 15 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 15 MPH.  
MIXING HEIGHT.......700 FT AGL.  
SMOKE DISPERSAL.....POOR (7700-9000 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....49-57.  
24 HR TREND......2 DEGREES WARMER.  
MIN HUMIDITY........34-40 PERCENT.  
24 HR TREND......14 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 15 MPH.  
MIXING HEIGHT.......600 FT AGL INCREASING TO 2100-3300 FT AGL IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (7200-33200 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
MOSTLY CLOUDY. LOWS IN THE UPPER 30S. HIGHS IN THE  
LOWER 50S. SOUTHWEST WINDS AROUND 15 MPH.    
SUNDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN AND SNOW. LOWS IN  
THE MID 30S. HIGHS IN THE UPPER 40S. WEST WINDS AROUND 15 MPH.    
MONDAY
 
WARMER. PARTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN  
THE LOWER 60S. SOUTHWEST WINDS AROUND 10 MPH.    
TUESDAY
 
COOLER. PARTLY CLOUDY WITH CHANCE OF RAIN AND SNOW.  
LOWS IN THE UPPER 30S. HIGHS IN THE UPPER 40S.    
WEDNESDAY
 
MOSTLY CLEAR. LOWS IN THE LOWER 30S. HIGHS IN THE  
UPPER 40S.  
 

 
 
WYZ303-211015-  
CENTRAL AND NORTHERN CARBON/FERRIS-SEMINOE-SHIRLEY MOUNTAINS-  
317 PM MDT WED OCT 20 2021  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MIN TEMPERATURE.....33-38.  
24 HR TREND......6 DEGREES WARMER.  
MAX HUMIDITY........74-80 PERCENT.  
24 HR TREND......18 PERCENT DRIER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......SOUTHWEST AROUND 15 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 20 MPH.  
MIXING HEIGHT.......600-1200 FT AGL.  
SMOKE DISPERSAL.....POOR (13600-18500 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 0900, THEN PARTLY CLOUDY  
UNTIL 1200, THEN MOSTLY SUNNY.  
MAX TEMPERATURE.....52-57.  
24 HR TREND......6 DEGREES WARMER.  
MIN HUMIDITY........31-37 PERCENT.  
24 HR TREND......14 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 15 MPH. GUSTS UP TO 25 MPH  
INCREASING TO 35 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 20 TO 25 MPH.  
MIXING HEIGHT.......700-1300 FT AGL INCREASING TO 5300-6800 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (16600 KNOT-FT) INCREASING TO VERY GOOD  
(120300 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY NIGHT
 
 
SKY/WEATHER.........CLEAR.  
MIN TEMPERATURE.....31-36.  
24 HR TREND......2 DEGREES COOLER.  
MAX HUMIDITY........73-79 PERCENT.  
24 HR TREND......7 PERCENT DRIER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH.  
MIXING HEIGHT.......700 FT AGL.  
SMOKE DISPERSAL.....POOR (6000-8300 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY UNTIL 1500, THEN PARTLY CLOUDY.  
MAX TEMPERATURE.....53-59.  
24 HR TREND......2 DEGREES WARMER.  
MIN HUMIDITY........28-34 PERCENT.  
24 HR TREND......1 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST 10 TO 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH.  
MIXING HEIGHT.......600 FT AGL INCREASING TO 2900-4100 FT AGL IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR TO FAIR (6200-54900 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
PARTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN THE  
LOWER 50S. SOUTHWEST WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW. LOWS IN THE  
LOWER 30S. HIGHS IN THE UPPER 40S. SOUTHWEST WINDS AROUND 15 MPH.   
MONDAY
 
WARMER. PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN. LOWS  
IN THE MID 30S. HIGHS IN THE LOWER 60S. SOUTHWEST WINDS AROUND  
15 MPH.    
TUESDAY
 
COOLER. PARTLY CLOUDY WITH CHANCE OF RAIN AND SNOW.  
LOWS IN THE MID 30S. HIGHS IN THE UPPER 40S.    
WEDNESDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF RAIN AND SNOW. LOWS  
IN THE LOWER 30S. HIGHS IN THE MID 40S.  
 

 
 
WYZ304-211015-  
SOUTHWEST CARBON COUNTY-  
317 PM MDT WED OCT 20 2021  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 0300, THEN MOSTLY CLOUDY.  
MIN TEMPERATURE.....30-35.  
24 HR TREND......2 DEGREES WARMER.  
MAX HUMIDITY........79-85 PERCENT.  
24 HR TREND......11 PERCENT DRIER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......SOUTH AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTH 10 TO 15 MPH.  
MIXING HEIGHT.......500-1700 FT AGL.  
SMOKE DISPERSAL.....POOR (7700-16900 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 0900, THEN PARTLY CLOUDY  
UNTIL 1200, THEN MOSTLY SUNNY.  
MAX TEMPERATURE.....54-59.  
24 HR TREND......6 DEGREES WARMER.  
MIN HUMIDITY........26-32 PERCENT.  
24 HR TREND......13 PERCENT DRIER.  
20-FOOT WINDS.......SOUTH 10 TO 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH.  
MIXING HEIGHT.......700-1200 FT AGL INCREASING TO 5200-6000 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (8700 KNOT-FT) INCREASING TO GOOD (73700  
KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY NIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....28-33.  
24 HR TREND......UNCHANGED.  
MAX HUMIDITY........81-87 PERCENT.  
24 HR TREND......UNCHANGED.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......SOUTH 5 TO 10 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTH AROUND 10 MPH.  
MIXING HEIGHT.......600 FT AGL.  
SMOKE DISPERSAL.....POOR (3900-5000 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY UNTIL 1500, THEN PARTLY CLOUDY.  
MAX TEMPERATURE.....56-61.  
24 HR TREND......2 DEGREES WARMER.  
MIN HUMIDITY........25-31 PERCENT.  
24 HR TREND......2 PERCENT DRIER.  
20-FOOT WINDS.......SOUTH 10 TO 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTH 10 TO 15 MPH.  
MIXING HEIGHT.......500 FT AGL INCREASING TO 2900-3800 FT AGL IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR TO FAIR (4700-51200 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
MOSTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN THE MID  
50S. SOUTH WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLOUDY WITH CHANCE OF RAIN AND SNOW. LOWS IN THE  
LOWER 30S. HIGHS AROUND 50. SOUTHWEST WINDS AROUND 10 MPH.    
MONDAY
 
WARMER. PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN. LOWS  
IN THE MID 30S. HIGHS IN THE LOWER 60S. SOUTH WINDS AROUND  
15 MPH.    
TUESDAY
 
COOLER. PARTLY CLOUDY WITH RAIN LIKELY AND CHANCE OF  
SNOW. LOWS IN THE MID 30S. HIGHS IN THE UPPER 40S.    
WEDNESDAY
 
PARTLY CLOUDY WITH CHANCE OF RAIN AND SNOW. LOWS IN  
THE UPPER 20S. HIGHS IN THE UPPER 40S.  
 

 
 
WYZ305-211015-  
SIERRA MADRE RANGE/MEDICINE BOW NF-  
317 PM MDT WED OCT 20 2021  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 0300, THEN MOSTLY CLOUDY.  
MIN TEMPERATURE.....29-34.  
24 HR TREND......5 DEGREES WARMER.  
MAX HUMIDITY........69-75 PERCENT.  
24 HR TREND......24 PERCENT DRIER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......SOUTH 10 TO 15 MPH. GUSTS UP TO 35 MPH  
DECREASING TO 25 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH.  
MIXING HEIGHT.......600-1600 FT AGL.  
SMOKE DISPERSAL.....POOR (13500-17900 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 0900, THEN PARTLY CLOUDY  
UNTIL 1500, THEN MOSTLY SUNNY.  
MAX TEMPERATURE.....46-54.  
24 HR TREND......5 DEGREES WARMER.  
MIN HUMIDITY........29-35 PERCENT.  
24 HR TREND......14 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST 10 TO 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH.  
MIXING HEIGHT.......1100-1700 FT AGL INCREASING TO 4300-5800 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (17500 KNOT-FT) INCREASING TO GOOD (74600  
KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY NIGHT
 
 
SKY/WEATHER.........CLEAR.  
MIN TEMPERATURE.....28-34.  
24 HR TREND......UNCHANGED.  
MAX HUMIDITY........68-74 PERCENT.  
24 HR TREND......3 PERCENT WETTER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......SOUTH AROUND 10 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTH AROUND 10 MPH.  
MIXING HEIGHT.......600 FT AGL.  
SMOKE DISPERSAL.....POOR (4700-5500 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY UNTIL 1200, THEN PARTLY CLOUDY.  
MAX TEMPERATURE.....48-56.  
24 HR TREND......4 DEGREES WARMER.  
MIN HUMIDITY........27-33 PERCENT.  
24 HR TREND......3 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST 10 TO 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH.  
MIXING HEIGHT.......600 FT AGL INCREASING TO 3600-4300 FT AGL IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR TO FAIR (5600-53100 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
PARTLY CLOUDY. LOWS IN THE LOWER 30S. HIGHS IN THE  
UPPER 40S. SOUTHWEST WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW AND RAIN. LOWS IN THE  
LOWER 30S. HIGHS IN THE LOWER 40S. SOUTHWEST WINDS AROUND 10 MPH.   
MONDAY
 
WARMER. PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN. LOWS  
IN THE LOWER 30S. HIGHS IN THE MID 50S. SOUTH WINDS AROUND  
10 MPH.    
TUESDAY
 
COLDER. PARTLY CLOUDY. CHANCE OF RAIN AND SNOW. LOWS  
IN THE LOWER 30S. HIGHS IN THE LOWER 40S.    
WEDNESDAY
 
PARTLY CLOUDY WITH CHANCE OF SNOW. LOWS IN THE MID  
20S. HIGHS IN THE UPPER 30S.  
 

 
 
WYZ306-211015-  
UPPER NORTH PLATTE RIVER BASIN-  
317 PM MDT WED OCT 20 2021  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 0300, THEN MOSTLY CLOUDY.  
MIN TEMPERATURE.....30-35.  
24 HR TREND......3 DEGREES WARMER.  
MAX HUMIDITY........73-79 PERCENT.  
24 HR TREND......22 PERCENT DRIER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......SOUTH AROUND 10 MPH. GUSTS UP TO 30 MPH  
DECREASING TO 20 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH.  
MIXING HEIGHT.......900-1700 FT AGL.  
SMOKE DISPERSAL.....POOR (13800-19500 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 0900, THEN PARTLY CLOUDY  
UNTIL 1200, THEN MOSTLY SUNNY.  
MAX TEMPERATURE.....53-58.  
24 HR TREND......5 DEGREES WARMER.  
MIN HUMIDITY........24-30 PERCENT.  
24 HR TREND......13 PERCENT DRIER.  
20-FOOT WINDS.......SOUTH AROUND 10 MPH SHIFTING TO THE WEST IN THE  
AFTERNOON. GUSTS UP TO 30 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH.  
MIXING HEIGHT.......1000-1500 FT AGL INCREASING TO 6400-6900 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (15400 KNOT-FT) INCREASING TO VERY GOOD  
(105700 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY NIGHT
 
 
SKY/WEATHER.........CLEAR.  
MIN TEMPERATURE.....28-33.  
24 HR TREND......3 DEGREES COOLER.  
MAX HUMIDITY........78-84 PERCENT.  
24 HR TREND......7 PERCENT WETTER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH.  
MIXING HEIGHT.......600 FT AGL.  
SMOKE DISPERSAL.....POOR (4300-5600 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY UNTIL 1500, THEN PARTLY CLOUDY.  
MAX TEMPERATURE.....55-60.  
24 HR TREND......2 DEGREES WARMER.  
MIN HUMIDITY........23-29 PERCENT.  
24 HR TREND......2 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH.  
MIXING HEIGHT.......600 FT AGL INCREASING TO 4200-4700 FT AGL IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR TO FAIR (5400-54800 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
PARTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN THE MID  
50S. SOUTHWEST WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLOUDY WITH CHANCE OF RAIN AND SNOW. LOWS IN THE  
LOWER 30S. HIGHS IN THE UPPER 40S. SOUTHWEST WINDS AROUND 10 MPH.   
MONDAY
 
WARMER. PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN. LOWS  
IN THE LOWER 30S. HIGHS IN THE LOWER 60S. SOUTHWEST WINDS AROUND  
10 MPH.    
TUESDAY
 
COOLER. PARTLY CLOUDY WITH CHANCE OF RAIN AND SNOW.  
LOWS IN THE MID 30S. HIGHS IN THE MID 40S.    
WEDNESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN AND SNOW.  
LOWS IN THE UPPER 20S. HIGHS IN THE MID 40S.  
 

 
 
WYZ307-211015-  
SNOWY RANGE/MEDICINE BOW NF-  
317 PM MDT WED OCT 20 2021  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MIN TEMPERATURE.....27-33.  
24 HR TREND......UNCHANGED.  
MAX HUMIDITY........67-73 PERCENT.  
24 HR TREND......34 PERCENT DRIER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......SOUTHWEST AROUND 15 MPH WITH GUSTS TO AROUND 35  
MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 20 MPH.  
MIXING HEIGHT.......500-1300 FT AGL.  
SMOKE DISPERSAL.....POOR (13200-16100 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 1500, THEN MOSTLY SUNNY.  
MAX TEMPERATURE.....44-52.  
24 HR TREND......3 DEGREES WARMER.  
MIN HUMIDITY........30-36 PERCENT.  
24 HR TREND......7 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 15 MPH WITH GUSTS TO AROUND 35  
MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 20 TO 25 MPH.  
MIXING HEIGHT.......1100-1800 FT AGL INCREASING TO 4700-6500 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (26400 KNOT-FT) INCREASING TO VERY GOOD  
(110400 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY NIGHT
 
 
SKY/WEATHER.........CLEAR.  
MIN TEMPERATURE.....24-32.  
24 HR TREND......1 DEGREE WARMER.  
MAX HUMIDITY........69-75 PERCENT.  
24 HR TREND......UNCHANGED.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH WITH GUSTS TO AROUND 35  
MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH.  
MIXING HEIGHT.......700 FT AGL.  
SMOKE DISPERSAL.....POOR (6800-7700 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY UNTIL 1500, THEN PARTLY CLOUDY.  
MAX TEMPERATURE.....46-54.  
24 HR TREND......1 DEGREE WARMER.  
MIN HUMIDITY........28-34 PERCENT.  
24 HR TREND......2 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH.  
MIXING HEIGHT.......600 FT AGL INCREASING TO 4000-4500 FT AGL IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR TO FAIR (7000-50900 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
PARTLY CLOUDY. LOWS AROUND 30. HIGHS IN THE UPPER  
40S. SOUTHWEST WINDS AROUND 15 MPH.    
SUNDAY
 
MOSTLY CLOUDY. CHANCE OF SNOW AND RAIN. LOWS IN THE  
UPPER 20S. HIGHS IN THE LOWER 40S. SOUTHWEST WINDS AROUND 15 MPH.   
MONDAY
 
WARMER. PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN. LOWS  
IN THE UPPER 20S. HIGHS IN THE MID 50S. SOUTHWEST WINDS AROUND  
10 MPH.    
TUESDAY
 
COLDER. PARTLY CLOUDY WITH CHANCE OF RAIN AND SNOW.  
LOWS IN THE LOWER 30S. HIGHS IN THE LOWER 40S.    
WEDNESDAY
 
PARTLY CLOUDY WITH CHANCE OF SNOW. LOWS IN THE MID  
20S. HIGHS IN THE UPPER 30S.  
 

 
 
WYZ308-211015-  
LARAMIE VALLEY/SHIRLEY BASIN-  
317 PM MDT WED OCT 20 2021  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MIN TEMPERATURE.....28-33.  
24 HR TREND......1 DEGREE WARMER.  
MAX HUMIDITY........84-90 PERCENT.  
24 HR TREND......8 PERCENT DRIER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 20 MPH.  
MIXING HEIGHT.......500-1100 FT AGL.  
SMOKE DISPERSAL.....POOR (12000-14100 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 1500, THEN MOSTLY SUNNY.  
MAX TEMPERATURE.....52-57.  
24 HR TREND......7 DEGREES WARMER.  
MIN HUMIDITY........33-39 PERCENT.  
24 HR TREND......19 PERCENT DRIER.  
20-FOOT WINDS.......WEST 10 TO 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 20 TO 25 MPH.  
MIXING HEIGHT.......800-1300 FT AGL INCREASING TO 5200-7200 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (16100 KNOT-FT) INCREASING TO VERY GOOD  
(126600 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY NIGHT
 
 
SKY/WEATHER.........CLEAR.  
MIN TEMPERATURE.....27-32.  
24 HR TREND......1 DEGREE COOLER.  
MAX HUMIDITY........85-91 PERCENT.  
24 HR TREND......8 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......WEST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 10 MPH.  
MIXING HEIGHT.......700 FT AGL.  
SMOKE DISPERSAL.....POOR (5200-6700 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....53-59.  
24 HR TREND......6 DEGREES WARMER.  
MIN HUMIDITY........29-35 PERCENT.  
24 HR TREND......5 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH.  
MIXING HEIGHT.......600 FT AGL INCREASING TO 2900-4700 FT AGL IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR TO FAIR (5000-43500 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
PARTLY CLOUDY. LOWS IN THE LOWER 30S. HIGHS IN THE  
MID 50S. SOUTHWEST WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN AND SNOW. LOWS IN  
THE LOWER 30S. HIGHS IN THE UPPER 40S. WEST WINDS AROUND 10 MPH.    
MONDAY
 
WARMER. PARTLY CLOUDY. LOWS IN THE LOWER 30S. HIGHS IN  
THE MID 60S. SOUTHWEST WINDS AROUND 10 MPH.    
TUESDAY
 
COOLER. PARTLY CLOUDY WITH CHANCE OF RAIN AND SLIGHT  
CHANCE OF SNOW. LOWS IN THE LOWER 30S. HIGHS AROUND 50.    
WEDNESDAY
 
MOSTLY CLEAR. SLIGHT CHANCE OF RAIN AND SNOW. LOWS  
IN THE UPPER 20S. HIGHS IN THE UPPER 40S.  
 

 
 
WYZ309-211015-  
SOUTH LARAMIE RANGE/MEDICINE BOW NF-  
317 PM MDT WED OCT 20 2021  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MIN TEMPERATURE.....32-40.  
24 HR TREND......7 DEGREES WARMER.  
MAX HUMIDITY........65-71 PERCENT.  
24 HR TREND......36 PERCENT DRIER.  
HUMIDITY RECOVERY...FAIR.  
20-FOOT WINDS.......WEST 10 TO 15 MPH WITH GUSTS TO AROUND 35 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 15 MPH INCREASING TO AROUND 25 MPH  
AFTER MIDNIGHT.  
MIXING HEIGHT.......500-1400 FT AGL.  
SMOKE DISPERSAL.....POOR (15300-16200 KNOT-FT).  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
THURSDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 1200, THEN PARTLY CLOUDY  
UNTIL 1500, THEN MOSTLY SUNNY.  
MAX TEMPERATURE.....53-61.  
24 HR TREND......7 DEGREES WARMER.  
MIN HUMIDITY........28-34 PERCENT.  
24 HR TREND......18 PERCENT DRIER.  
20-FOOT WINDS.......WEST AROUND 15 MPH WITH GUSTS TO AROUND 35 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 25 TO 30 MPH.  
MIXING HEIGHT.......900-1400 FT AGL INCREASING TO 5100-6900 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (26800 KNOT-FT) INCREASING TO VERY GOOD  
(125400 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
THURSDAY NIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....32-40.  
24 HR TREND......1 DEGREE COOLER.  
MAX HUMIDITY........59-65 PERCENT.  
24 HR TREND......3 PERCENT DRIER.  
HUMIDITY RECOVERY...FAIR.  
20-FOOT WINDS.......WEST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 15 MPH.  
MIXING HEIGHT.......700 FT AGL.  
SMOKE DISPERSAL.....POOR (8000-8300 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....56-64.  
24 HR TREND......3 DEGREES WARMER.  
MIN HUMIDITY........22-28 PERCENT.  
24 HR TREND......5 PERCENT DRIER.  
20-FOOT WINDS.......WEST 10 TO 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 10 TO 15 MPH.  
MIXING HEIGHT.......600 FT AGL INCREASING TO 3800-5500 FT AGL IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR TO FAIR (7400-48100 KNOT-FT).  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
PARTLY CLOUDY. LOWS IN THE UPPER 30S. HIGHS IN THE  
UPPER 50S. SOUTHWEST WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN AND SNOW. LOWS IN  
THE UPPER 30S. HIGHS IN THE LOWER 50S. WEST WINDS AROUND 10 MPH.    
MONDAY
 
WARMER. PARTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN  
THE MID 60S. SOUTHWEST WINDS AROUND 10 MPH.    
TUESDAY
 
COOLER. PARTLY CLOUDY WITH CHANCE OF RAIN AND SNOW.  
LOWS IN THE UPPER 30S. HIGHS IN THE MID 50S.    
WEDNESDAY
 
MOSTLY CLEAR. SLIGHT CHANCE OF RAIN AND SNOW. LOWS  
IN THE MID 30S. HIGHS IN THE LOWER 50S.  
 

 
 
WYZ310-211015-  
PLATTE/GOSHEN/CENTRAL AND EASTERN LARAMIE-  
317 PM MDT WED OCT 20 2021  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MIN TEMPERATURE.....33-38.  
24 HR TREND......7 DEGREES WARMER.  
MAX HUMIDITY........82-88 PERCENT.  
24 HR TREND......UNCHANGED.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......SOUTHWEST 5 TO 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 10 TO 15 MPH.  
MIXING HEIGHT.......300-900 FT AGL.  
SMOKE DISPERSAL.....POOR (5800-7300 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 1500, THEN MOSTLY SUNNY.  
MAX TEMPERATURE.....59-64.  
24 HR TREND......10 DEGREES WARMER.  
MIN HUMIDITY........30-36 PERCENT.  
24 HR TREND......19 PERCENT DRIER.  
20-FOOT WINDS.......NORTHWEST 10 TO 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 20 MPH.  
MIXING HEIGHT.......600-1100 FT AGL INCREASING TO 5900-6900 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (15100 KNOT-FT) INCREASING TO VERY GOOD  
(120000 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY NIGHT
 
 
SKY/WEATHER.........CLEAR.  
MIN TEMPERATURE.....33-38.  
24 HR TREND......1 DEGREE COOLER.  
MAX HUMIDITY........76-82 PERCENT.  
24 HR TREND......UNCHANGED.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......WEST 5 TO 10 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 10 MPH.  
MIXING HEIGHT.......500 FT AGL.  
SMOKE DISPERSAL.....POOR (3900-4300 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....62-67.  
24 HR TREND......3 DEGREES WARMER.  
MIN HUMIDITY........24-30 PERCENT.  
24 HR TREND......4 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 10 MPH SHIFTING TO THE SOUTHWEST IN  
THE AFTERNOON.  
MIXING HEIGHT.......600 FT AGL INCREASING TO 3400-5400 FT AGL IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (4500-36600 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
PARTLY CLOUDY. LOWS IN THE UPPER 30S. HIGHS IN THE  
MID 60S. SOUTHWEST WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN. LOWS IN THE UPPER  
30S. HIGHS IN THE UPPER 50S. WEST WINDS AROUND 10 MPH.    
MONDAY
 
WARMER. MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS AROUND  
70. SOUTHWEST WINDS AROUND 10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN. LOWS IN THE  
UPPER 30S. HIGHS IN THE LOWER 60S.    
WEDNESDAY
 
MOSTLY CLEAR. SLIGHT CHANCE OF RAIN. LOWS IN THE MID  
30S. HIGHS IN THE UPPER 50S.  
 

 
 
NEZ311-211015-  
PINE RIDGE/NEBRASKA NATIONAL FOREST/OGLALA NATIONAL GRASSLANDS-  
317 PM MDT WED OCT 20 2021  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. PATCHY FOG AFTER 0100.  
MIN TEMPERATURE.....29-34.  
24 HR TREND......1 DEGREE WARMER.  
MAX HUMIDITY........94-100 PERCENT.  
24 HR TREND......UNCHANGED.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTHEAST AROUND 5 MPH SHIFTING TO THE SOUTH  
AFTER MIDNIGHT. GUSTS UP TO 15 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH.  
MIXING HEIGHT.......400-900 FT AGL.  
SMOKE DISPERSAL.....POOR (4200-4800 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 1500, THEN MOSTLY SUNNY.  
PATCHY FOG UNTIL 0900.  
MAX TEMPERATURE.....56-61.  
24 HR TREND......11 DEGREES WARMER.  
MIN HUMIDITY........42-48 PERCENT.  
24 HR TREND......16 PERCENT DRIER.  
20-FOOT WINDS.......NORTHWEST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH.  
MIXING HEIGHT.......600-1100 FT AGL INCREASING TO 3100-5100 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR TO FAIR (12000-59300 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY NIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....32-38.  
24 HR TREND......5 DEGREES WARMER.  
MAX HUMIDITY........89-95 PERCENT.  
24 HR TREND......UNCHANGED.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......WEST AROUND 5 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 5 TO 10 MPH.  
MIXING HEIGHT.......500 FT AGL.  
SMOKE DISPERSAL.....POOR (2700-3200 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....62-67.  
24 HR TREND......8 DEGREES WARMER.  
MIN HUMIDITY........29-35 PERCENT.  
24 HR TREND......15 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 5 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 10 MPH SHIFTING TO THE SOUTHEAST IN  
THE AFTERNOON.  
MIXING HEIGHT.......500 FT AGL INCREASING TO 3000-3800 FT AGL IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (3200-23400 KNOT-FT).  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
PARTLY CLOUDY. LOWS IN THE UPPER 30S. HIGHS IN THE  
MID 60S. SOUTH WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN. LOWS AROUND 40.  
HIGHS AROUND 60. WEST WINDS AROUND 10 MPH.    
MONDAY
 
MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE UPPER  
60S. SOUTHWEST WINDS AROUND 10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN. LOWS IN THE  
LOWER 40S. HIGHS IN THE MID 60S.    
WEDNESDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE  
LOWER 60S.  
 

 
 
NEZ312-211015-  
BOX BUTTE/SOUTH SIOUX-  
317 PM MDT WED OCT 20 2021  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. PATCHY FOG AFTER 0100.  
MIN TEMPERATURE.....29-34.  
24 HR TREND......1 DEGREE WARMER.  
MAX HUMIDITY........94-100 PERCENT.  
24 HR TREND......UNCHANGED.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTH AROUND 5 MPH SHIFTING TO THE SOUTHWEST  
AFTER MIDNIGHT. GUSTS UP TO 15 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 10 MPH.  
MIXING HEIGHT.......200-800 FT AGL.  
SMOKE DISPERSAL.....POOR (4100-5200 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 1500, THEN MOSTLY SUNNY.  
PATCHY FOG UNTIL 0900.  
MAX TEMPERATURE.....59-64.  
24 HR TREND......12 DEGREES WARMER.  
MIN HUMIDITY........35-41 PERCENT.  
24 HR TREND......22 PERCENT DRIER.  
20-FOOT WINDS.......NORTHWEST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST 15 TO 20 MPH.  
MIXING HEIGHT.......600 FT AGL INCREASING TO 4000-6000 FT AGL IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (9800 KNOT-FT) INCREASING TO GOOD (88100  
KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY NIGHT
 
 
SKY/WEATHER.........CLEAR.  
MIN TEMPERATURE.....31-36.  
24 HR TREND......UNCHANGED.  
MAX HUMIDITY........92-98 PERCENT.  
24 HR TREND......UNCHANGED.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......WEST AROUND 5 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 5 TO 10 MPH.  
MIXING HEIGHT.......500 FT AGL.  
SMOKE DISPERSAL.....POOR (2600-3000 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....63-68.  
24 HR TREND......4 DEGREES WARMER.  
MIN HUMIDITY........26-32 PERCENT.  
24 HR TREND......6 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 5 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 10 MPH SHIFTING TO THE SOUTH IN THE  
AFTERNOON.  
MIXING HEIGHT.......500 FT AGL INCREASING TO 3300-3800 FT AGL IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (3200-22900 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
PARTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN THE MID  
60S. SOUTH WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN. LOWS AROUND 40.  
HIGHS AROUND 60. WEST WINDS AROUND 10 MPH.    
MONDAY
 
MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE UPPER  
60S. SOUTHWEST WINDS AROUND 10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN. LOWS IN THE  
UPPER 30S. HIGHS IN THE MID 60S.    
WEDNESDAY
 
MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE  
LOWER 60S.  
 

 
 
NEZ313-211015-  
SCOTTS BLUFF NATIONAL MONUMENT/WILDCAT HILLS-  
317 PM MDT WED OCT 20 2021  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....32-37.  
24 HR TREND......1 DEGREE WARMER.  
MAX HUMIDITY........91-97 PERCENT.  
24 HR TREND......2 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTHWEST AROUND 5 MPH SHIFTING TO THE  
SOUTHWEST AFTER MIDNIGHT. GUSTS UP TO 20 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 10 TO 15 MPH.  
MIXING HEIGHT.......400-1000 FT AGL.  
SMOKE DISPERSAL.....POOR (5000-6300 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 1500, THEN MOSTLY SUNNY.  
MAX TEMPERATURE.....62-67.  
24 HR TREND......11 DEGREES WARMER.  
MIN HUMIDITY........28-34 PERCENT.  
24 HR TREND......18 PERCENT DRIER.  
20-FOOT WINDS.......NORTHWEST 10 TO 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST 15 TO 20 MPH.  
MIXING HEIGHT.......500-1000 FT AGL INCREASING TO 5400-6800 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (11400 KNOT-FT) INCREASING TO VERY GOOD  
(115200 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
THURSDAY NIGHT
 
 
SKY/WEATHER.........CLEAR.  
MIN TEMPERATURE.....33-38.  
24 HR TREND......1 DEGREE WARMER.  
MAX HUMIDITY........80-86 PERCENT.  
24 HR TREND......11 PERCENT DRIER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......WEST AROUND 5 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 5 TO 10 MPH.  
MIXING HEIGHT.......500 FT AGL.  
SMOKE DISPERSAL.....POOR (3000-3400 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....65-70.  
24 HR TREND......4 DEGREES WARMER.  
MIN HUMIDITY........22-28 PERCENT.  
24 HR TREND......4 PERCENT DRIER.  
20-FOOT WINDS.......WEST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 10 MPH.  
MIXING HEIGHT.......500 FT AGL INCREASING TO 3600-5500 FT AGL IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (4000-33900 KNOT-FT).  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
PARTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN THE  
UPPER 60S. WINDS GENERALLY LESS THAN 10 MPH.    
SUNDAY
 
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN AND THUNDERSTORMS.  
LOWS AROUND 40. HIGHS IN THE LOWER 60S. WEST WINDS AROUND 10 MPH.   
MONDAY
 
MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS AROUND 70.  
SOUTHWEST WINDS AROUND 10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN. LOWS AROUND  
40. HIGHS IN THE MID 60S.    
WEDNESDAY
 
MOSTLY CLEAR. SLIGHT CHANCE OF RAIN. LOWS IN THE  
UPPER 30S. HIGHS IN THE LOWER 60S.  
 

 
 
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