134  
FNUS55 KCYS 130809  
FWFCYS  
 
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST WYOMING/WESTERN NEBRASKA  
NATIONAL WEATHER SERVICE CHEYENNE WY  
209 AM MDT THU AUG 13 2020  
 
...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT  
THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FWZ 301 THROUGH 312...  
 
...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH FRIDAY  
EVENING FOR GUSTY WINDS AND LOW HUMIDITY FWZ 302 THROUGH 310...  
   
DISCUSSION
 
 
WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS CAN BE EXPECTED TODAY  
ACROSS MUCH OF SOUTHEAST WYOMING AND NEBRASKA PANHANDLE. RED FLAG  
WARNINGS IN EFFECT FOR FWZ 301 THROUGH 312 FROM 9 AM THOUGH 8PM  
TODAY. A COLD FRONT APPROACHING FROM THE NORTHWEST WILL PUSH THE  
HIGH PRESSURE WE HAVE BEEN SEEING THE PAST COUPLE  
DAYS...SOUTHWARD. THIS ACTION WILL INCREASE WIND SPEEDS ACROSS  
ALMOST ALL AREAS TODAY. COLD FRONT WILL EVENTUALLY MOVE SOUTH  
OVER THE AREA THIS EVENING WITH WINDS SHIFTING NORTHEAST BEHIND  
THE FRONT ACROSS THE NEBRASKA PANHANDLE. TO THE SOUTH AND WEST OF  
THE FRONT...WESTERLY WINDS WILL STAY STRONG WITH CRITICAL FIRE  
WEATHER CONDITIONS EXPECTED ONCE AGAIN FRIDAY. CRITICAL FIRE  
WEATHER CONDITIONS EXPECTED TO CONTINUE INTO THE WEEKEND FOR MOST  
SOUTHEAST WYOMING FIRE ZONES AS HIGH PRESSURE BUILDS BACK OVER THE  
AREA AND HOT TEMPERATURES AND DEEP MIXING EXPECTED TO ALLOW WINDS  
FROM HIGH ELEVATIONS TO MIX DOWN TO THE SURFACE.  
 
WYZ301-132230-  
NIOBRARA/LOWER ELEVATIONS OF CONVERSE/THUNDER BASIN NATIONAL  
GRASSLAND-  
209 AM MDT THU AUG 13 2020  
 
...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT  
THIS EVENING...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY UNTIL 1500, THEN PARTLY CLOUDY.  
MAX TEMPERATURE.....91-96.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........9 PERCENT.  
24 HR TREND......1 PERCENT DRIER.  
20-FOOT WINDS.......WEST 10 TO 15 MPH. GUSTS UP TO 25 MPH  
INCREASING TO 40 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 10 MPH INCREASING TO AROUND 20 MPH  
IN THE AFTERNOON.  
MIXING HEIGHT.......1800-3800 FT AGL INCREASING TO 16400-17600 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (29100 KNOT-FT) INCREASING TO EXCELLENT  
(271900 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....55-60.  
24 HR TREND......3 DEGREES COOLER.  
MAX HUMIDITY........53-59 PERCENT.  
24 HR TREND......9 PERCENT WETTER.  
HUMIDITY RECOVERY...FAIR.  
20-FOOT WINDS.......WEST AROUND 10 MPH. GUSTS UP TO 40 MPH  
DECREASING TO 20 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 15 TO 20 MPH.  
MIXING HEIGHT.......3300-5300 FT AGL DECREASING TO 200-2200 FT AGL  
AFTER MIDNIGHT.  
SMOKE DISPERSAL.....POOR TO GOOD (19300-60900 KNOT-FT).  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....85-90.  
24 HR TREND......7 DEGREES COOLER.  
MIN HUMIDITY........10-16 PERCENT.  
24 HR TREND......8 PERCENT WETTER.  
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.......2700-3800 FT AGL INCREASING TO 8500-9300 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (61100 KNOT-FT) INCREASING TO VERY GOOD  
(125400 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
CLEAR. LOWS IN THE MID 50S. HIGHS AROUND 90.  
NORTHEAST WINDS AROUND 5 MPH.    
SUNDAY
 
CLEAR. LOWS IN THE MID 50S. HIGHS IN THE UPPER 80S.  
EAST WINDS AROUND 5 MPH.    
MONDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 50S. HIGHS IN THE UPPER  
80S. WINDS GENERALLY LESS THAN 10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE UPPER 50S. HIGHS IN THE UPPER 80S.    
WEDNESDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE UPPER 50S. HIGHS IN THE UPPER 80S.  
 

 
 
WYZ302-132230-  
NORTH LARAMIE RANGE/MEDICINE BOW NF-  
209 AM MDT THU AUG 13 2020  
 
...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT  
THIS EVENING...  
...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH  
FRIDAY EVENING...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....80-88.  
24 HR TREND......UNCHANGED.  
MIN HUMIDITY........10 PERCENT.  
24 HR TREND......1 PERCENT DRIER.  
20-FOOT WINDS.......WEST 15 TO 20 MPH. GUSTS UP TO 30 MPH  
INCREASING TO 45 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 15 TO 20 MPH.  
MIXING HEIGHT.......7200-9200 FT AGL INCREASING TO 15700-17300 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....VERY GOOD (120400 KNOT-FT) INCREASING TO  
EXCELLENT (304900 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....53-59.  
24 HR TREND......1 DEGREE COOLER.  
MAX HUMIDITY........31-37 PERCENT.  
24 HR TREND......1 PERCENT WETTER.  
HUMIDITY RECOVERY...POOR.  
20-FOOT WINDS.......WEST 10 TO 15 MPH. GUSTS UP TO 40 MPH  
DECREASING TO 25 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 25 MPH.  
MIXING HEIGHT.......7500-9500 FT AGL DECREASING TO 1100-2100 FT AGL  
AFTER MIDNIGHT.  
SMOKE DISPERSAL.....EXCELLENT (181000 KNOT-FT) DECREASING TO POOR  
(34000 KNOT-FT) AFTER MIDNIGHT.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....80-86.  
24 HR TREND......1 DEGREE WARMER.  
MIN HUMIDITY........8-14 PERCENT.  
24 HR TREND......5 PERCENT WETTER.  
20-FOOT WINDS.......WEST AROUND 15 MPH WITH GUSTS TO AROUND 40 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 20 TO 25 MPH.  
MIXING HEIGHT.......2600-3800 FT AGL INCREASING TO 8900-10300 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (62900 KNOT-FT) INCREASING TO EXCELLENT  
(180200 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
CLEAR. LOWS IN THE MID 50S. HIGHS IN THE MID 80S.  
WEST WINDS AROUND 10 MPH.    
SUNDAY
 
CLEAR. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS  
IN THE MID 50S. HIGHS IN THE LOWER 80S. EAST WINDS AROUND 5 MPH.    
MONDAY
 
MOSTLY CLEAR. LOWS IN THE MID 50S. HIGHS IN THE LOWER  
80S. WINDS GENERALLY LESS THAN 10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS IN THE LOWER 80S.    
WEDNESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS AROUND 80.  
 

 
 
WYZ303-132230-  
CENTRAL AND NORTHERN CARBON/FERRIS-SEMINOE-SHIRLEY MOUNTAINS-  
209 AM MDT THU AUG 13 2020  
 
...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT  
THIS EVENING...  
...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH  
FRIDAY EVENING...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....83-88.  
24 HR TREND......UNCHANGED.  
MIN HUMIDITY........8 PERCENT.  
24 HR TREND......2 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH WITH HIGHER GUSTS  
INCREASING TO WEST AROUND 20 MPH WITH GUSTS TO  
AROUND 45 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 15 MPH INCREASING TO AROUND 25 MPH  
IN THE AFTERNOON.  
MIXING HEIGHT.......4000-6000 FT AGL INCREASING TO 15900-17000 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (81000 KNOT-FT) INCREASING TO EXCELLENT  
(361400 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....51-56.  
24 HR TREND......UNCHANGED.  
MAX HUMIDITY........29-35 PERCENT.  
24 HR TREND......10 PERCENT DRIER.  
HUMIDITY RECOVERY...POOR.  
20-FOOT WINDS.......SOUTHWEST 10 TO 15 MPH. GUSTS UP TO 40 MPH  
DECREASING TO 20 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 20 TO 25 MPH.  
MIXING HEIGHT.......6400-8400 FT AGL DECREASING TO 700-2000 FT AGL  
AFTER MIDNIGHT.  
SMOKE DISPERSAL.....EXCELLENT (157900 KNOT-FT) DECREASING TO POOR  
(22500 KNOT-FT) AFTER MIDNIGHT.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....83-88.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........5-11 PERCENT.  
24 HR TREND......1 PERCENT WETTER.  
20-FOOT WINDS.......WEST 15 TO 20 MPH WITH GUSTS TO AROUND 40 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 20 TO 25 MPH.  
MIXING HEIGHT.......3400-5100 FT AGL INCREASING TO 10000-11200 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (78400 KNOT-FT) INCREASING TO EXCELLENT  
(218700 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
CLEAR. LOWS IN THE LOWER 50S. HIGHS IN THE MID 80S.  
WEST WINDS AROUND 10 MPH.    
SUNDAY
 
CLEAR. LOWS IN THE LOWER 50S. HIGHS IN THE MID 80S.  
NORTH WINDS AROUND 5 MPH.    
MONDAY
 
MOSTLY CLEAR. LOWS IN THE LOWER 50S. HIGHS IN THE MID  
80S. WINDS GENERALLY LESS THAN 10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS IN THE MID 80S.    
WEDNESDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS IN THE LOWER 80S.  
 

 
 
WYZ304-132230-  
SOUTHWEST CARBON COUNTY-  
209 AM MDT THU AUG 13 2020  
 
...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT  
THIS EVENING...  
...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH  
FRIDAY EVENING...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....85-90.  
24 HR TREND......UNCHANGED.  
MIN HUMIDITY........8 PERCENT.  
24 HR TREND......2 PERCENT DRIER.  
20-FOOT WINDS.......SOUTH AROUND 10 MPH WITH HIGHER GUSTS  
INCREASING TO SOUTHWEST AROUND 20 MPH WITH  
GUSTS TO AROUND 40 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTH AROUND 10 MPH INCREASING TO SOUTHWEST  
AROUND 20 MPH IN THE AFTERNOON.  
MIXING HEIGHT.......1200-3200 FT AGL INCREASING TO 16500-17100 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (21300 KNOT-FT) INCREASING TO EXCELLENT  
(321400 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....48-53.  
24 HR TREND......UNCHANGED.  
MAX HUMIDITY........26-32 PERCENT.  
24 HR TREND......14 PERCENT DRIER.  
HUMIDITY RECOVERY...POOR.  
20-FOOT WINDS.......SOUTHWEST AROUND 15 MPH WITH GUSTS TO AROUND 40  
MPH SHIFTING TO THE SOUTH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 20 MPH BECOMING SOUTHWEST AROUND 10  
MPH AFTER MIDNIGHT.  
MIXING HEIGHT.......4600-6600 FT AGL DECREASING TO 600-1300 FT AGL  
AFTER MIDNIGHT.  
SMOKE DISPERSAL.....GOOD (94100 KNOT-FT) DECREASING TO POOR (9300  
KNOT-FT) AFTER MIDNIGHT.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....85-90.  
24 HR TREND......1 DEGREE WARMER.  
MIN HUMIDITY........5-11 PERCENT.  
24 HR TREND......1 PERCENT WETTER.  
20-FOOT WINDS.......WEST 10 TO 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 15 TO 20 MPH.  
MIXING HEIGHT.......2000-3800 FT AGL INCREASING TO 10800-11800 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (31700 KNOT-FT) INCREASING TO EXCELLENT  
(212500 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE UPPER 80S.  
WEST WINDS AROUND 10 MPH.    
SUNDAY
 
CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE UPPER 80S.  
NORTH WINDS AROUND 5 MPH.    
MONDAY
 
MOSTLY CLEAR. LOWS AROUND 50. HIGHS IN THE UPPER 80S.  
WINDS GENERALLY LESS THAN 10 MPH.    
TUESDAY
 
PARTLY CLOUDY. LOWS IN THE LOWER 50S. HIGHS IN THE  
UPPER 80S.    
WEDNESDAY
 
PARTLY CLOUDY. LOWS IN THE LOWER 50S. HIGHS IN THE  
UPPER 80S.  
 

 
 
WYZ305-132230-  
SIERRA MADRE RANGE/MEDICINE BOW NF-  
209 AM MDT THU AUG 13 2020  
 
...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT  
THIS EVENING...  
...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH  
FRIDAY EVENING...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....74-84.  
24 HR TREND......4 DEGREES WARMER.  
MIN HUMIDITY........5-11 PERCENT.  
24 HR TREND......1 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH WITH HIGHER GUSTS  
INCREASING TO WEST AROUND 20 MPH WITH GUSTS TO  
AROUND 40 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 15 TO 20 MPH.  
MIXING HEIGHT.......9600-11600 FT AGL INCREASING TO 14600-16300 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....VERY GOOD (143500 KNOT-FT) INCREASING TO  
EXCELLENT (285900 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....47-53.  
24 HR TREND......2 DEGREES WARMER.  
MAX HUMIDITY........25-31 PERCENT.  
24 HR TREND......12 PERCENT DRIER.  
HUMIDITY RECOVERY...POOR.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH. GUSTS UP TO 35 MPH  
DECREASING TO 20 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 15 TO 20 MPH.  
MIXING HEIGHT.......5000-7000 FT AGL DECREASING TO 1600-3600 FT AGL  
AFTER MIDNIGHT.  
SMOKE DISPERSAL.....VERY GOOD (107800 KNOT-FT) DECREASING TO POOR  
(33800 KNOT-FT) AFTER MIDNIGHT.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....77-85.  
24 HR TREND......2 DEGREES WARMER.  
MIN HUMIDITY........5-11 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......WEST 10 TO 15 MPH WITH GUSTS TO 30 MPH IN THE  
AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 20 TO 25 MPH.  
MIXING HEIGHT.......4600-5900 FT AGL INCREASING TO 9900-11500 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (91400 KNOT-FT) INCREASING TO EXCELLENT  
(216500 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE LOWER 80S.  
WEST WINDS AROUND 10 MPH.    
SUNDAY
 
CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE LOWER 80S.  
WEST WINDS AROUND 5 MPH.    
MONDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE LOWER  
80S. WINDS GENERALLY LESS THAN 10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS AROUND 80.    
WEDNESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS IN THE UPPER 70S.  
 

 
 
WYZ306-132230-  
UPPER NORTH PLATTE RIVER BASIN-  
209 AM MDT THU AUG 13 2020  
 
...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT  
THIS EVENING...  
...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH  
FRIDAY EVENING...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....83-88.  
24 HR TREND......UNCHANGED.  
MIN HUMIDITY........8 PERCENT.  
24 HR TREND......2 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH WITH HIGHER GUSTS  
INCREASING TO WEST AROUND 20 MPH WITH GUSTS TO  
AROUND 40 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 15 TO 20 MPH.  
MIXING HEIGHT.......5000-7000 FT AGL INCREASING TO 16300-17100 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (66900 KNOT-FT) INCREASING TO EXCELLENT  
(305100 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....49-54.  
24 HR TREND......1 DEGREE WARMER.  
MAX HUMIDITY........29-35 PERCENT.  
24 HR TREND......10 PERCENT DRIER.  
HUMIDITY RECOVERY...POOR.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH. GUSTS UP TO 35 MPH  
DECREASING TO 20 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 20 MPH BECOMING SOUTHWEST AROUND 10  
MPH AFTER MIDNIGHT.  
MIXING HEIGHT.......4400-6400 FT AGL DECREASING TO 900-1900 FT AGL  
AFTER MIDNIGHT.  
SMOKE DISPERSAL.....GOOD (93000 KNOT-FT) DECREASING TO POOR (14600  
KNOT-FT) AFTER MIDNIGHT.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....83-88.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........9 PERCENT.  
24 HR TREND......1 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH INCREASING TO WEST  
AROUND 20 MPH IN THE AFTERNOON. GUSTS UP TO 40  
MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 20 TO 25 MPH.  
MIXING HEIGHT.......4200-5100 FT AGL INCREASING TO 10900-12000 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (73000 KNOT-FT) INCREASING TO EXCELLENT  
(238500 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
CLEAR. LOWS AROUND 50. HIGHS IN THE MID 80S.  
SOUTHWEST WINDS AROUND 10 MPH.    
SUNDAY
 
CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE MID 80S.  
SOUTHWEST WINDS AROUND 5 MPH.    
MONDAY
 
MOSTLY CLEAR. LOWS AROUND 50. HIGHS IN THE MID 80S.  
WINDS GENERALLY LESS THAN 10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS IN THE MID 80S.    
WEDNESDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS IN THE LOWER 80S.  
 

 
 
WYZ307-132230-  
SNOWY RANGE/MEDICINE BOW NF-  
209 AM MDT THU AUG 13 2020  
 
...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT  
THIS EVENING...  
...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH  
FRIDAY EVENING...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....72-80.  
24 HR TREND......1 DEGREE WARMER.  
MIN HUMIDITY........6-12 PERCENT.  
24 HR TREND......3 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH WITH HIGHER GUSTS  
INCREASING TO WEST AROUND 20 MPH WITH GUSTS TO  
AROUND 40 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 20 MPH.  
MIXING HEIGHT.......8200-10200 FT AGL INCREASING TO 14700-16300 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....EXCELLENT (174200 KNOT-FT) INCREASING TO  
EXCELLENT (275500 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....41-51.  
24 HR TREND......4 DEGREES WARMER.  
MAX HUMIDITY........30-36 PERCENT.  
24 HR TREND......29 PERCENT DRIER.  
HUMIDITY RECOVERY...POOR.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH. GUSTS UP TO 35 MPH  
DECREASING TO 20 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 20 MPH.  
MIXING HEIGHT.......4000-6000 FT AGL.  
SMOKE DISPERSAL.....GOOD TO VERY GOOD (76800-105100 KNOT-FT).  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....75-81.  
24 HR TREND......2 DEGREES WARMER.  
MIN HUMIDITY........6-12 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......WEST 15 TO 20 MPH WITH GUSTS TO AROUND 40 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 25 TO 30 MPH.  
MIXING HEIGHT.......4500-5900 FT AGL INCREASING TO 9800-11800 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....VERY GOOD (124800 KNOT-FT) INCREASING TO  
EXCELLENT (247600 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
CLEAR. LOWS IN THE MID 40S. HIGHS IN THE UPPER 70S.  
WEST WINDS AROUND 10 MPH.    
SUNDAY
 
CLEAR. LOWS IN THE MID 40S. HIGHS IN THE UPPER 70S.  
SOUTHWEST WINDS AROUND 5 MPH.    
MONDAY
 
MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE UPPER  
70S. WINDS GENERALLY LESS THAN 10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE UPPER 40S. HIGHS IN THE MID 70S.    
WEDNESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE MID 70S.  
 

 
 
WYZ308-132230-  
LARAMIE VALLEY/SHIRLEY BASIN-  
209 AM MDT THU AUG 13 2020  
 
...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT  
THIS EVENING...  
...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH  
FRIDAY EVENING...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....83-88.  
24 HR TREND......1 DEGREE WARMER.  
MIN HUMIDITY........9 PERCENT.  
24 HR TREND......2 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH WITH HIGHER GUSTS  
INCREASING TO WEST AROUND 20 MPH WITH GUSTS TO  
AROUND 45 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 15 TO 20 MPH.  
MIXING HEIGHT.......4300-6300 FT AGL INCREASING TO 16200-16800 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (75700 KNOT-FT) INCREASING TO EXCELLENT  
(308000 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....48-53.  
24 HR TREND......UNCHANGED.  
MAX HUMIDITY........36-42 PERCENT.  
24 HR TREND......12 PERCENT DRIER.  
HUMIDITY RECOVERY...POOR.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH. GUSTS UP TO 40 MPH  
DECREASING TO 15 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 15 TO 20 MPH.  
MIXING HEIGHT.......3600-5600 FT AGL DECREASING TO 500-2100 FT AGL  
AFTER MIDNIGHT.  
SMOKE DISPERSAL.....GOOD (85000 KNOT-FT) DECREASING TO POOR (20500  
KNOT-FT) AFTER MIDNIGHT.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....83-88.  
24 HR TREND......UNCHANGED.  
MIN HUMIDITY........10 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......WEST 15 TO 20 MPH WITH GUSTS TO AROUND 40 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 20 TO 25 MPH.  
MIXING HEIGHT.......3500-5500 FT AGL INCREASING TO 10200-12200 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (82600 KNOT-FT) INCREASING TO EXCELLENT  
(228100 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE MID 80S.  
WEST WINDS AROUND 10 MPH.    
SUNDAY
 
CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE MID 80S.  
SOUTHEAST WINDS AROUND 5 MPH.    
MONDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE MID  
80S. WINDS GENERALLY LESS THAN 10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS AROUND 50. HIGHS IN THE LOWER 80S.    
WEDNESDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS AROUND 50. HIGHS IN THE LOWER 80S.  
 

 
 
WYZ309-132230-  
SOUTH LARAMIE RANGE/MEDICINE BOW NF-  
209 AM MDT THU AUG 13 2020  
 
...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT  
THIS EVENING...  
...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH  
FRIDAY EVENING...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....83-91.  
24 HR TREND......1 DEGREE WARMER.  
MIN HUMIDITY........10 PERCENT.  
24 HR TREND......1 PERCENT DRIER.  
20-FOOT WINDS.......WEST AROUND 10 MPH WITH HIGHER GUSTS INCREASING  
TO AROUND 20 MPH WITH GUSTS TO AROUND 40 MPH IN  
THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 20 MPH.  
MIXING HEIGHT.......7800-9800 FT AGL INCREASING TO 16200-17600 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....EXCELLENT (155900 KNOT-FT) INCREASING TO  
EXCELLENT (283900 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 0300, THEN CLEAR.  
MIN TEMPERATURE.....53-61.  
24 HR TREND......2 DEGREES WARMER.  
MAX HUMIDITY........25-31 PERCENT.  
24 HR TREND......11 PERCENT DRIER.  
HUMIDITY RECOVERY...POOR.  
20-FOOT WINDS.......WEST AROUND 10 MPH. GUSTS UP TO 35 MPH  
DECREASING TO 25 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 15 TO 20 MPH.  
MIXING HEIGHT.......3900-5900 FT AGL DECREASING TO 1100-3100 FT AGL  
AFTER MIDNIGHT.  
SMOKE DISPERSAL.....POOR TO GOOD (34700-77000 KNOT-FT).  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....83-89.  
24 HR TREND......UNCHANGED.  
MIN HUMIDITY........6-12 PERCENT.  
24 HR TREND......1 PERCENT WETTER.  
20-FOOT WINDS.......WEST 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.......4200-6200 FT AGL INCREASING TO 10900-12900 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....VERY GOOD (100700 KNOT-FT) INCREASING TO  
EXCELLENT (226100 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
CLEAR. LOWS IN THE MID 50S. HIGHS IN THE UPPER 80S.  
WEST WINDS AROUND 10 MPH.    
SUNDAY
 
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS IN THE LOWER 80S.  
SOUTHEAST WINDS AROUND 5 MPH.    
MONDAY
 
MOSTLY CLEAR. LOWS IN THE MID 50S. HIGHS IN THE LOWER  
80S. WINDS GENERALLY LESS THAN 10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS IN THE LOWER 80S.    
WEDNESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS IN THE LOWER 80S.  
 

 
 
WYZ310-132230-  
PLATTE/GOSHEN/CENTRAL AND EASTERN LARAMIE-  
209 AM MDT THU AUG 13 2020  
 
...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT  
THIS EVENING...  
...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH  
FRIDAY EVENING...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....91-96.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........9 PERCENT.  
24 HR TREND......1 PERCENT DRIER.  
20-FOOT WINDS.......WEST 10 TO 15 MPH. GUSTS UP TO 20 MPH  
INCREASING TO 30 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 15 MPH.  
MIXING HEIGHT.......3100-5100 FT AGL INCREASING TO 16400-17500 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (62600 KNOT-FT) INCREASING TO EXCELLENT  
(230400 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 0300, THEN CLEAR.  
MIN TEMPERATURE.....56-61.  
24 HR TREND......1 DEGREE COOLER.  
MAX HUMIDITY........37-43 PERCENT.  
24 HR TREND......2 PERCENT DRIER.  
HUMIDITY RECOVERY...POOR.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH. GUSTS UP TO 30 MPH  
DECREASING TO 20 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 15 MPH.  
MIXING HEIGHT.......3500-5500 FT AGL DECREASING TO 300-2300 FT AGL  
AFTER MIDNIGHT.  
SMOKE DISPERSAL.....POOR TO FAIR (18000-48100 KNOT-FT).  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....88-93.  
24 HR TREND......4 DEGREES COOLER.  
MIN HUMIDITY........8-14 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.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST 20 TO 25 MPH.  
MIXING HEIGHT.......1500-3500 FT AGL INCREASING TO 9000-11000 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....FAIR (47200 KNOT-FT) INCREASING TO EXCELLENT  
(165900 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
CLEAR. LOWS IN THE MID 50S. HIGHS IN THE LOWER 90S.  
WEST WINDS AROUND 5 MPH.    
SUNDAY
 
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS IN THE UPPER 80S. EAST  
WINDS AROUND 5 MPH.    
MONDAY
 
MOSTLY CLEAR. LOWS IN THE MID 50S. HIGHS IN THE UPPER  
80S. WINDS GENERALLY LESS THAN 10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS IN THE UPPER 80S.    
WEDNESDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE UPPER 50S. HIGHS IN THE MID 80S.  
 

 
 
NEZ311-132230-  
PINE RIDGE/NEBRASKA NATIONAL FOREST/OGLALA NATIONAL GRASSLANDS-  
209 AM MDT THU AUG 13 2020  
 
...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT  
THIS EVENING...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....93-98.  
24 HR TREND......6 DEGREES COOLER.  
MIN HUMIDITY........7-13 PERCENT.  
24 HR TREND......2 PERCENT DRIER.  
20-FOOT WINDS.......WEST AROUND 10 MPH. GUSTS UP TO 20 MPH  
INCREASING TO 35 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 10 TO 15 MPH.  
MIXING HEIGHT.......1000-1500 FT AGL INCREASING TO 15600-16400 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (15000 KNOT-FT) INCREASING TO VERY GOOD  
(130400 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....59-64.  
24 HR TREND......2 DEGREES COOLER.  
MAX HUMIDITY........48-54 PERCENT.  
24 HR TREND......4 PERCENT DRIER.  
HUMIDITY RECOVERY...POOR.  
20-FOOT WINDS.......SOUTH AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH.  
MIXING HEIGHT.......3000-5000 FT AGL DECREASING TO 200-1300 FT AGL  
AFTER MIDNIGHT.  
SMOKE DISPERSAL.....POOR TO FAIR (12100-44800 KNOT-FT).  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....86-91.  
24 HR TREND......4 DEGREES COOLER.  
MIN HUMIDITY........16-22 PERCENT.  
24 HR TREND......9 PERCENT WETTER.  
20-FOOT WINDS.......NORTHWEST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 20 MPH.  
MIXING HEIGHT.......2000-3000 FT AGL INCREASING TO 8300-9100 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....FAIR (44200 KNOT-FT) INCREASING TO VERY GOOD  
(144300 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
CLEAR. LOWS IN THE UPPER 50S. HIGHS IN THE LOWER 90S.  
SOUTHEAST WINDS AROUND 5 MPH.    
SUNDAY
 
CLEAR. LOWS IN THE UPPER 50S. HIGHS IN THE UPPER 80S.  
EAST WINDS AROUND 5 MPH.    
MONDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 50S. HIGHS IN THE UPPER  
80S. WINDS GENERALLY LESS THAN 10 MPH.    
TUESDAY
 
PARTLY CLOUDY. LOWS IN THE UPPER 50S. HIGHS IN THE  
UPPER 80S.    
WEDNESDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE UPPER 50S. HIGHS IN THE UPPER 80S.  
 

 
 
NEZ312-132230-  
BOX BUTTE/SOUTH SIOUX-  
209 AM MDT THU AUG 13 2020  
 
...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT  
THIS EVENING...  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....93-98.  
24 HR TREND......2 DEGREES COOLER.  
MIN HUMIDITY........12 PERCENT.  
24 HR TREND......1 PERCENT DRIER.  
20-FOOT WINDS.......WEST 5 TO 10 MPH. GUSTS UP TO 20 MPH INCREASING  
TO 35 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 10 TO 15 MPH.  
MIXING HEIGHT.......1000 FT AGL INCREASING TO 15900-16400 FT AGL IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (13000 KNOT-FT) INCREASING TO EXCELLENT  
(166200 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 0300, THEN CLEAR.  
MIN TEMPERATURE.....57-62.  
24 HR TREND......2 DEGREES WARMER.  
MAX HUMIDITY........53-59 PERCENT.  
24 HR TREND......19 PERCENT DRIER.  
HUMIDITY RECOVERY...FAIR.  
20-FOOT WINDS.......SOUTHWEST 5 TO 10 MPH. GUSTS UP TO 30 MPH  
DECREASING TO 20 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH.  
MIXING HEIGHT.......5200-7200 FT AGL DECREASING TO 300-800 FT AGL  
AFTER MIDNIGHT.  
SMOKE DISPERSAL.....GOOD (69800 KNOT-FT) DECREASING TO POOR (7200  
KNOT-FT) AFTER MIDNIGHT.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....88-93.  
24 HR TREND......6 DEGREES COOLER.  
MIN HUMIDITY........15-21 PERCENT.  
24 HR TREND......10 PERCENT WETTER.  
20-FOOT WINDS.......NORTHWEST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST 20 TO 25 MPH.  
MIXING HEIGHT.......1700-2200 FT AGL INCREASING TO 8200-9400 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (36900 KNOT-FT) INCREASING TO EXCELLENT  
(159700 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
CLEAR. LOWS IN THE MID 50S. HIGHS IN THE LOWER 90S.  
SOUTHEAST WINDS AROUND 5 MPH.    
SUNDAY
 
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS IN THE UPPER 80S. EAST  
WINDS AROUND 5 MPH.    
MONDAY
 
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS IN THE UPPER 80S. WINDS  
GENERALLY LESS THAN 10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE UPPER 50S. HIGHS IN THE UPPER 80S.    
WEDNESDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE UPPER 50S. HIGHS IN THE UPPER 80S.  
 

 
 
NEZ313-132230-  
SCOTTS BLUFF NATIONAL MONUMENT/WILDCAT HILLS-  
209 AM MDT THU AUG 13 2020  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....94-99.  
24 HR TREND......1 DEGREE WARMER.  
MIN HUMIDITY........6-12 PERCENT.  
24 HR TREND......5 PERCENT DRIER.  
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.......500-2300 FT AGL INCREASING TO 16400-17000 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (18500 KNOT-FT) INCREASING TO EXCELLENT  
(232300 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....57-62.  
24 HR TREND......2 DEGREES WARMER.  
MAX HUMIDITY........54-60 PERCENT.  
24 HR TREND......11 PERCENT DRIER.  
HUMIDITY RECOVERY...FAIR.  
20-FOOT WINDS.......SOUTHWEST 5 TO 10 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH INCREASING TO AROUND 20  
MPH AFTER MIDNIGHT.  
MIXING HEIGHT.......4700-6700 FT AGL DECREASING TO 300-1200 FT AGL  
AFTER MIDNIGHT.  
SMOKE DISPERSAL.....POOR TO FAIR (10400-45100 KNOT-FT).  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....91-96.  
24 HR TREND......3 DEGREES COOLER.  
MIN HUMIDITY........10-16 PERCENT.  
24 HR TREND......4 PERCENT WETTER.  
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.......1400-2000 FT AGL INCREASING TO 8200-10200 FT  
AGL IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (31200 KNOT-FT) INCREASING TO EXCELLENT  
(162800 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
SATURDAY
 
CLEAR. LOWS IN THE UPPER 50S. HIGHS IN THE LOWER 90S.  
SOUTHEAST WINDS AROUND 5 MPH.    
SUNDAY
 
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS AROUND 90. EAST WINDS  
AROUND 5 MPH.    
MONDAY
 
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS IN THE UPPER 80S. WINDS  
GENERALLY LESS THAN 10 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE UPPER 50S. HIGHS IN THE UPPER 80S.    
WEDNESDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE UPPER 50S. HIGHS IN THE UPPER 80S.  
 

 
 
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