494  
FNUS55 KCYS 200801  
FWFCYS  
 
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST WYOMING/WESTERN NEBRASKA  
NATIONAL WEATHER SERVICE CHEYENNE WY  
201 AM MDT TUE OCT 20 2020  
 
...HIGH WIND WARNING IN EFFECT UNTIL NOON MDT TODAY FOR WIND PRONE  
AREAS OF SOUTHEAST WYOMING...  
   
DISCUSSION
 
 
STRONG WINDS WILL CONTINUE THIS MORNING ALONG AND WEST OF THE  
LARAMIE RANGE. FORTUNATELY...AFTERNOON HUMIDITY EXPECTED TO REMAIN  
AROUND 20 PERCENT TO PRECLUDE ANY FIRE WEATHER HEADLINES. AM  
EXPECTING WINDS TO EASE THROUGH THE MORNING AS GRADIENTS EASE.  
COLD FRONT REMAINS OVER THE AREA THROUGH THE WEEK WITH EAST TO  
SOUTHEAST WINDS OVER THE PANHANDLE AND SOUTHEASTERN WYOMING  
PLAINS. HELP ON AREA FIRES IS ON THE WAY FROM MOTHER NATURE. A  
COLD FRONT THURSDAY EXPECTED TO BRING A FEW INCHES OF SNOW TO THE  
MOUNTAINS AND CONVERSE COUNTY...ALONG WITH COLDER TEMPERATURES AND  
HIGHER HUMIDITY. CONFIDENCE CONTINUES TO GROW FOR A WIDESPREAD  
SIGNIFICANT SNOW EVENT THIS WEEKEND THAT WILL AID IN FIRE  
SUPPRESSION EFFORTS. MAY SEE WIDESPREAD 6-8 INCHES IN LOW LYING  
AREAS WITH 12-15 INCHES IN THE SNOWY AND SIERRA MADRE RANGES WITH  
THIS SYSTEM.  
 
WYZ301-202300-  
NIOBRARA/LOWER ELEVATIONS OF CONVERSE/THUNDER BASIN NATIONAL  
GRASSLAND-  
201 AM MDT TUE OCT 20 2020  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 1500, THEN PARTLY CLOUDY.  
SLIGHT CHANCE OF SNOW UNTIL 0700. SLIGHT CHANCE  
OF RAIN UNTIL 1300.  
MAX TEMPERATURE.....44-49.  
24 HR TREND......17 DEGREES COOLER.  
MIN HUMIDITY........51-57 PERCENT.  
24 HR TREND......24 PERCENT WETTER.  
20-FOOT WINDS.......NORTHWEST 10 TO 15 MPH. GUSTS UP TO 30 MPH  
INCREASING TO 40 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 20 MPH.  
MIXING HEIGHT.......1400-2200 FT AGL INCREASING TO 3700-4800 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR TO GOOD (33000-66100 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 0300, THEN PARTLY CLOUDY.  
SLIGHT CHANCE OF RAIN UNTIL 2400SLIGHT CHANCE  
OF SNOW AFTER 2000 UNTIL 2400.  
MIN TEMPERATURE.....28-33.  
24 HR TREND......1 DEGREE COOLER.  
MAX HUMIDITY........92-98 PERCENT.  
24 HR TREND......UNCHANGED.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......SOUTHEAST 5 TO 10 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....EAST AROUND 10 MPH SHIFTING TO THE SOUTH AFTER  
MIDNIGHT.  
MIXING HEIGHT.......400-1700 FT AGL.  
SMOKE DISPERSAL.....POOR (8100-8500 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 1200, THEN MOSTLY SUNNY  
UNTIL 1500, THEN PARTLY CLOUDY.  
MAX TEMPERATURE.....59-69.  
24 HR TREND......22 DEGREES WARMER.  
MIN HUMIDITY........26-32 PERCENT.  
24 HR TREND......29 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST 5 TO 10 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 20 TO 25 MPH.  
MIXING HEIGHT.......700-1200 FT AGL INCREASING TO 6300-8300 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (14900 KNOT-FT) INCREASING TO EXCELLENT  
(159700 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
MUCH COLDER. MOSTLY CLOUDY WITH SNOW LIKELY AND  
CHANCE OF RAIN. LOWS IN THE UPPER 20S. HIGHS IN THE MID 30S.  
NORTHWEST WINDS AROUND 10 MPH.    
FRIDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW. LOWS AROUND 14.  
HIGHS IN THE LOWER 30S. NORTHEAST WINDS AROUND 10 MPH.    
SATURDAY
 
CLOUDY WITH SNOW LIKELY. LOWS IN THE LOWER 20S. HIGHS  
IN THE MID 30S. EAST WINDS AROUND 10 MPH.    
SUNDAY
 
COLDER. CLOUDY WITH SNOW. LOWS AROUND 10. HIGHS IN THE  
LOWER 20S.    
MONDAY
 
MOSTLY CLOUDY. CHANCE OF SNOW. LOWS AROUND 4. HIGHS IN  
THE LOWER 20S.  
 

 
 
WYZ302-202300-  
NORTH LARAMIE RANGE/MEDICINE BOW NF-  
201 AM MDT TUE OCT 20 2020  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 0900, THEN MOSTLY CLOUDY  
UNTIL 1500, THEN PARTLY CLOUDY.  
MAX TEMPERATURE.....45-53.  
24 HR TREND......11 DEGREES COOLER.  
MIN HUMIDITY........38-44 PERCENT.  
24 HR TREND......3 PERCENT WETTER.  
20-FOOT WINDS.......NORTHWEST AROUND 15 MPH WITH GUSTS TO AROUND 40  
MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 30 MPH DECREASING TO AROUND 20 MPH  
IN THE AFTERNOON.  
MIXING HEIGHT.......1400-2200 FT AGL INCREASING TO 4400-6400 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....FAIR TO GOOD (44400-94200 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 2400, THEN PARTLY CLOUDY.  
MIN TEMPERATURE.....34-39.  
24 HR TREND......2 DEGREES COOLER.  
MAX HUMIDITY........67-73 PERCENT.  
24 HR TREND......UNCHANGED.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......SOUTHWEST 10 TO 15 MPH. GUSTS UP TO 20 MPH  
INCREASING TO 35 MPH AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH INCREASING TO WEST  
AROUND 30 MPH AFTER MIDNIGHT.  
MIXING HEIGHT.......700-1400 FT AGL.  
SMOKE DISPERSAL.....POOR (13600-23200 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY UNTIL 1500, THEN PARTLY CLOUDY.  
MAX TEMPERATURE.....55-65.  
24 HR TREND......14 DEGREES WARMER.  
MIN HUMIDITY........22-28 PERCENT.  
24 HR TREND......12 PERCENT DRIER.  
20-FOOT WINDS.......WEST AROUND 20 MPH WITH GUSTS TO AROUND 40 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 40 MPH.  
MIXING HEIGHT.......1400-2100 FT AGL INCREASING TO 6000-7900 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (65000 KNOT-FT) INCREASING TO EXCELLENT  
(245800 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
MUCH COLDER. PARTLY CLOUDY. SNOW LIKELY AND SLIGHT  
CHANCE OF RAIN. LOWS IN THE UPPER 20S. HIGHS IN THE MID 30S.  
NORTHWEST WINDS AROUND 15 MPH.    
FRIDAY
 
MOSTLY CLOUDY. CHANCE OF SNOW. LOWS AROUND 13. HIGHS IN  
THE LOWER 30S. SOUTH WINDS AROUND 10 MPH.    
SATURDAY
 
MOSTLY CLOUDY WITH SNOW LIKELY. LOWS IN THE MID 20S.  
HIGHS IN THE MID 30S. SOUTHWEST WINDS AROUND 10 MPH.    
SUNDAY
 
COLDER, SNOW. LOWS AROUND 7. HIGHS AROUND 16.    
MONDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW. LOWS AROUND 2. HIGHS  
AROUND 17.  
 

 
 
WYZ303-202300-  
CENTRAL AND NORTHERN CARBON/FERRIS-SEMINOE-SHIRLEY MOUNTAINS-  
201 AM MDT TUE OCT 20 2020  
   
..HIGH WIND WARNING IN EFFECT UNTIL NOON MDT TODAY
 
 
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MAX TEMPERATURE.....53-58.  
24 HR TREND......4 DEGREES COOLER.  
MIN HUMIDITY........26-32 PERCENT.  
24 HR TREND......3 PERCENT WETTER.  
20-FOOT WINDS.......WEST AROUND 20 MPH. GUSTS UP TO 60 MPH  
DECREASING TO 50 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 25 TO 30 MPH.  
MIXING HEIGHT.......1200-2100 FT AGL INCREASING TO 6200-7100 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....FAIR (47400 KNOT-FT) INCREASING TO EXCELLENT  
(156700 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MIN TEMPERATURE.....37-42.  
24 HR TREND......3 DEGREES COOLER.  
MAX HUMIDITY........59-65 PERCENT.  
24 HR TREND......5 PERCENT WETTER.  
HUMIDITY RECOVERY...FAIR.  
20-FOOT WINDS.......SOUTHWEST AROUND 15 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 25 MPH.  
MIXING HEIGHT.......800-2400 FT AGL.  
SMOKE DISPERSAL.....POOR TO FAIR (23700-42600 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 1200, THEN MOSTLY SUNNY.  
MAX TEMPERATURE.....60-65.  
24 HR TREND......6 DEGREES WARMER.  
MIN HUMIDITY........18-24 PERCENT.  
24 HR TREND......10 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST 15 TO 20 MPH WITH GUSTS TO AROUND 40  
MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 35 TO 40 MPH.  
MIXING HEIGHT.......1200-2000 FT AGL INCREASING TO 6600-7700 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....FAIR (47200 KNOT-FT) INCREASING TO EXCELLENT  
(255900 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
MUCH COLDER. PARTLY CLOUDY. SNOW LIKELY AND SLIGHT  
CHANCE OF RAIN. LOWS IN THE LOWER 30S. HIGHS IN THE UPPER 30S.  
WEST WINDS AROUND 15 MPH.    
FRIDAY
 
PARTLY CLOUDY. SLIGHT CHANCE OF SNOW. LOWS AROUND 14.  
HIGHS IN THE UPPER 30S. EAST WINDS AROUND 5 MPH.    
SATURDAY
 
MOSTLY CLOUDY WITH SNOW AND RAIN LIKELY. LOWS IN THE  
UPPER 20S. HIGHS IN THE LOWER 40S. SOUTHWEST WINDS AROUND 10 MPH.   
SUNDAY
 
MUCH COLDER. SNOW. LOWS AROUND 6. HIGHS AROUND 18.    
MONDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW. LOWS AROUND 3. HIGHS  
AROUND 18.  
 

 
 
WYZ304-202300-  
SOUTHWEST CARBON COUNTY-  
201 AM MDT TUE OCT 20 2020  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MAX TEMPERATURE.....58-64.  
24 HR TREND......2 DEGREES COOLER.  
MIN HUMIDITY........24-30 PERCENT.  
24 HR TREND......8 PERCENT WETTER.  
20-FOOT WINDS.......WEST 15 TO 20 MPH WITH GUSTS TO AROUND 35 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 20 MPH INCREASING TO WEST  
AROUND 30 MPH IN THE AFTERNOON.  
MIXING HEIGHT.......800-1300 FT AGL INCREASING TO 6800-8200 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (18000 KNOT-FT) INCREASING TO EXCELLENT  
(190800 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MIN TEMPERATURE.....32-37.  
24 HR TREND......5 DEGREES COOLER.  
MAX HUMIDITY........68-74 PERCENT.  
24 HR TREND......11 PERCENT WETTER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......SOUTHWEST 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.....SOUTHWEST 15 TO 20 MPH.  
MIXING HEIGHT.......600-1900 FT AGL.  
SMOKE DISPERSAL.....POOR (9600-27600 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....63-68.  
24 HR TREND......7 DEGREES WARMER.  
MIN HUMIDITY........16-22 PERCENT.  
24 HR TREND......10 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 INCREASING TO AROUND 35  
MPH IN THE AFTERNOON.  
MIXING HEIGHT.......800-1300 FT AGL INCREASING TO 7500-8100 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (15600 KNOT-FT) INCREASING TO EXCELLENT  
(222100 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
MUCH COLDER. PARTLY CLOUDY WITH CHANCE OF SNOW AND  
RAIN. LOWS IN THE LOWER 30S. HIGHS IN THE LOWER 40S. WEST WINDS  
AROUND 10 MPH.    
FRIDAY
 
PARTLY CLOUDY. LOWS AROUND 14. HIGHS IN THE LOWER 40S.  
NORTHEAST WINDS AROUND 5 MPH.    
SATURDAY
 
MOSTLY CLOUDY WITH CHANCE OF RAIN AND SLIGHT CHANCE  
OF SNOW. LOWS IN THE UPPER 20S. HIGHS IN THE LOWER 50S. SOUTHWEST  
WINDS AROUND 10 MPH.    
SUNDAY
 
MUCH COLDER. CLOUDY WITH SNOW AND RAIN LIKELY. LOWS  
AROUND 9. HIGHS IN THE UPPER 20S.    
MONDAY
 
MOSTLY CLOUDY. CHANCE OF SNOW. LOWS AROUND 7. HIGHS IN  
THE MID 20S.  
 

 
 
WYZ305-202300-  
SIERRA MADRE RANGE/MEDICINE BOW NF-  
201 AM MDT TUE OCT 20 2020  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MAX TEMPERATURE.....50-58.  
24 HR TREND......4 DEGREES COOLER.  
MIN HUMIDITY........27-33 PERCENT.  
24 HR TREND......4 PERCENT WETTER.  
20-FOOT WINDS.......WEST AROUND 20 MPH WITH GUSTS TO AROUND 45 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 30 TO 35 MPH.  
MIXING HEIGHT.......1800-2600 FT AGL INCREASING TO 5500-7200 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (62900 KNOT-FT) INCREASING TO EXCELLENT  
(193600 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MIN TEMPERATURE.....32-38.  
24 HR TREND......3 DEGREES COOLER.  
MAX HUMIDITY........57-63 PERCENT.  
24 HR TREND......2 PERCENT WETTER.  
HUMIDITY RECOVERY...FAIR.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 20 TO 25 MPH.  
MIXING HEIGHT.......900-2900 FT AGL.  
SMOKE DISPERSAL.....POOR TO GOOD (19800-60200 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....54-62.  
24 HR TREND......4 DEGREES WARMER.  
MIN HUMIDITY........16-22 PERCENT.  
24 HR TREND......6 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH INCREASING TO AROUND 20  
MPH IN THE AFTERNOON. GUSTS UP TO 35 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 25 MPH INCREASING TO AROUND 40  
MPH IN THE AFTERNOON.  
MIXING HEIGHT.......1600-2300 FT AGL INCREASING TO 6000-7600 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....FAIR (45500 KNOT-FT) INCREASING TO EXCELLENT  
(236500 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
COLDER. PARTLY CLOUDY. CHANCE OF SNOW. LOWS IN THE  
LOWER 30S. HIGHS IN THE UPPER 30S. WEST WINDS AROUND 15 MPH.    
FRIDAY
 
PARTLY CLOUDY. LOWS AROUND 17. HIGHS AROUND 40.  
SOUTHWEST WINDS AROUND 5 MPH.    
SATURDAY
 
MOSTLY CLOUDY. RAIN AND SNOW LIKELY. LOWS AROUND 30.  
HIGHS IN THE UPPER 40S. SOUTHWEST WINDS AROUND 10 MPH.    
SUNDAY
 
MUCH COLDER. SNOW AND RAIN. LOWS AROUND 9. HIGHS IN THE  
LOWER 20S.    
MONDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW. LOWS AROUND 6. HIGHS  
AROUND 19.  
 

 
 
WYZ306-202300-  
UPPER NORTH PLATTE RIVER BASIN-  
201 AM MDT TUE OCT 20 2020  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MAX TEMPERATURE.....55-60.  
24 HR TREND......5 DEGREES COOLER.  
MIN HUMIDITY........29 PERCENT.  
24 HR TREND......8 PERCENT WETTER.  
20-FOOT WINDS.......WEST AROUND 20 MPH WITH GUSTS TO AROUND 45 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 25 MPH INCREASING TO AROUND 35 MPH  
IN THE AFTERNOON.  
MIXING HEIGHT.......1500-2400 FT AGL INCREASING TO 6900-7400 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....FAIR (46000 KNOT-FT) INCREASING TO EXCELLENT  
(210800 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MIN TEMPERATURE.....34-39.  
24 HR TREND......1 DEGREE COOLER.  
MAX HUMIDITY........60-66 PERCENT.  
24 HR TREND......7 PERCENT WETTER.  
HUMIDITY RECOVERY...FAIR.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 20 MPH.  
MIXING HEIGHT.......900-2100 FT AGL.  
SMOKE DISPERSAL.....POOR (16800-28700 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....62-67.  
24 HR TREND......7 DEGREES WARMER.  
MIN HUMIDITY........19 PERCENT.  
24 HR TREND......10 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH INCREASING TO AROUND 20  
MPH IN THE AFTERNOON. GUSTS UP TO 35 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 25 MPH INCREASING TO WEST  
AROUND 40 MPH IN THE AFTERNOON.  
MIXING HEIGHT.......1200-1900 FT AGL INCREASING TO 7600-8300 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (29900 KNOT-FT) INCREASING TO EXCELLENT  
(266700 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
MUCH COLDER. PARTLY CLOUDY. CHANCE OF SNOW. LOWS IN  
THE MID 30S. HIGHS IN THE LOWER 40S. WEST WINDS AROUND 10 MPH.    
FRIDAY
 
PARTLY CLOUDY. LOWS AROUND 14. HIGHS IN THE LOWER 40S.  
SOUTHWEST WINDS AROUND 5 MPH.    
SATURDAY
 
MOSTLY CLOUDY WITH CHANCE OF RAIN AND SLIGHT CHANCE  
OF SNOW. LOWS IN THE UPPER 20S. HIGHS IN THE UPPER 40S. SOUTHWEST  
WINDS AROUND 10 MPH.    
SUNDAY
 
MUCH COLDER. SNOW AND RAIN. LOWS AROUND 7. HIGHS IN THE  
LOWER 20S.    
MONDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW. LOWS AROUND 7. HIGHS  
AROUND 20.  
 

 
 
WYZ307-202300-  
SNOWY RANGE/MEDICINE BOW NF-  
201 AM MDT TUE OCT 20 2020  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MAX TEMPERATURE.....46-54.  
24 HR TREND......6 DEGREES COOLER.  
MIN HUMIDITY........31-37 PERCENT.  
24 HR TREND......12 PERCENT WETTER.  
20-FOOT WINDS.......BREEZY. WEST AROUND 25 MPH WITH GUSTS TO AROUND  
55 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 40 MPH.  
MIXING HEIGHT.......1700-2600 FT AGL INCREASING TO 4800-6500 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (77200 KNOT-FT) INCREASING TO EXCELLENT  
(196800 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MIN TEMPERATURE.....31-37.  
24 HR TREND......UNCHANGED.  
MAX HUMIDITY........61-67 PERCENT.  
24 HR TREND......3 PERCENT DRIER.  
HUMIDITY RECOVERY...FAIR.  
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 30 MPH.  
MIXING HEIGHT.......800-2700 FT AGL.  
SMOKE DISPERSAL.....POOR TO FAIR (26600-55400 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....50-60.  
24 HR TREND......5 DEGREES WARMER.  
MIN HUMIDITY........20-26 PERCENT.  
24 HR TREND......11 PERCENT DRIER.  
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 40 TO 45 MPH.  
MIXING HEIGHT.......1500-2200 FT AGL INCREASING TO 5600-7400 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (62200 KNOT-FT) INCREASING TO EXCELLENT  
(247800 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. PARTLY CLOUDY. SNOW LIKELY. LOWS IN THE LOWER  
30S. HIGHS IN THE MID 30S. WEST WINDS AROUND 15 MPH.    
FRIDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW. LOWS AROUND  
14. HIGHS IN THE UPPER 30S. SOUTHWEST WINDS AROUND 5 MPH.    
SATURDAY
 
MOSTLY CLOUDY. SNOW AND RAIN LIKELY. LOWS IN THE  
UPPER 20S. HIGHS IN THE LOWER 40S. SOUTHWEST WINDS AROUND 15 MPH.   
SUNDAY
 
MUCH COLDER. SNOW. LOWS AROUND 7. HIGHS AROUND 19.    
MONDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW. LOWS AROUND 2. HIGHS  
AROUND 15.  
 

 
 
WYZ308-202300-  
LARAMIE VALLEY/SHIRLEY BASIN-  
201 AM MDT TUE OCT 20 2020  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MAX TEMPERATURE.....53-59.  
24 HR TREND......4 DEGREES COOLER.  
MIN HUMIDITY........26-32 PERCENT.  
24 HR TREND......4 PERCENT WETTER.  
20-FOOT WINDS.......BREEZY. WEST 20 TO 25 MPH WITH GUSTS TO AROUND  
55 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 30 TO 35 MPH.  
MIXING HEIGHT.......1600-2700 FT AGL INCREASING TO 6800-7400 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (63400 KNOT-FT) INCREASING TO EXCELLENT  
(182300 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 2100, THEN MOSTLY CLOUDY  
UNTIL 2400, THEN PARTLY CLOUDY.  
MIN TEMPERATURE.....34-39.  
24 HR TREND......4 DEGREES COOLER.  
MAX HUMIDITY........64-70 PERCENT.  
24 HR TREND......12 PERCENT WETTER.  
HUMIDITY RECOVERY...FAIR.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 20 MPH.  
MIXING HEIGHT.......600-1700 FT AGL.  
SMOKE DISPERSAL.....POOR (15200-17400 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....61-66.  
24 HR TREND......7 DEGREES WARMER.  
MIN HUMIDITY........16-22 PERCENT.  
24 HR TREND......10 PERCENT DRIER.  
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 35 TO 40 MPH.  
MIXING HEIGHT.......1400-2000 FT AGL INCREASING TO 7000-8400 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....FAIR (49000 KNOT-FT) INCREASING TO EXCELLENT  
(271300 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
MUCH COLDER. PARTLY CLOUDY. SNOW LIKELY. LOWS IN THE  
LOWER 30S. HIGHS IN THE LOWER 40S. WEST WINDS AROUND 10 MPH.    
FRIDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW. LOWS AROUND  
12. HIGHS IN THE UPPER 30S. SOUTHEAST WINDS AROUND 5 MPH.    
SATURDAY
 
MOSTLY CLOUDY WITH SNOW LIKELY AND CHANCE OF RAIN.  
LOWS IN THE MID 20S. HIGHS IN THE MID 40S. SOUTHWEST WINDS AROUND  
10 MPH.    
SUNDAY
 
MUCH COLDER. SNOW. LOWS AROUND 6. HIGHS AROUND 19.    
MONDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW. LOWS NEAR ZERO.  
HIGHS AROUND 18.  
 

 
 
WYZ309-202300-  
SOUTH LARAMIE RANGE/MEDICINE BOW NF-  
201 AM MDT TUE OCT 20 2020  
   
..HIGH WIND WARNING IN EFFECT UNTIL NOON MDT TODAY
 
 
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MAX TEMPERATURE.....53-61.  
24 HR TREND......10 DEGREES COOLER.  
MIN HUMIDITY........25-31 PERCENT.  
24 HR TREND......7 PERCENT WETTER.  
20-FOOT WINDS.......BREEZY. NORTHWEST 20 TO 25 MPH WITH GUSTS TO  
AROUND 60 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 40 MPH BECOMING NORTHWEST AROUND 25  
MPH IN THE AFTERNOON.  
MIXING HEIGHT.......1600-2400 FT AGL INCREASING TO 5700-7700 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (67000 KNOT-FT) INCREASING TO EXCELLENT  
(154200 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 2400, THEN PARTLY CLOUDY.  
MIN TEMPERATURE.....33-39.  
24 HR TREND......5 DEGREES COOLER.  
MAX HUMIDITY........71-77 PERCENT.  
24 HR TREND......17 PERCENT WETTER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......SOUTH AROUND 10 MPH AND GUSTY.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTH AROUND 15 MPH INCREASING TO SOUTHWEST  
AROUND 25 MPH AFTER MIDNIGHT.  
MIXING HEIGHT.......500-1900 FT AGL.  
SMOKE DISPERSAL.....POOR (14900-15000 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY UNTIL 1500, THEN PARTLY CLOUDY.  
MAX TEMPERATURE.....62-70.  
24 HR TREND......7 DEGREES WARMER.  
MIN HUMIDITY........14-20 PERCENT.  
24 HR TREND......13 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 AROUND 35 MPH.  
MIXING HEIGHT.......1300-2200 FT AGL INCREASING TO 7800-9200 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....FAIR (52300 KNOT-FT) INCREASING TO EXCELLENT  
(256800 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
MUCH COLDER. PARTLY CLOUDY WITH CHANCE OF SNOW AND  
SLIGHT CHANCE OF RAIN. LOWS IN THE MID 30S. HIGHS IN THE LOWER  
40S. WEST WINDS AROUND 15 MPH.    
FRIDAY
 
PARTLY CLOUDY. CHANCE OF SNOW. LOWS AROUND 15. HIGHS IN  
THE MID 30S. EAST WINDS AROUND 10 MPH.    
SATURDAY
 
MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW. LOWS IN THE  
MID 20S. HIGHS IN THE MID 40S. SOUTH WINDS AROUND 10 MPH.    
SUNDAY
 
MUCH COLDER. SNOW LIKELY. LOWS AROUND 10. HIGHS AROUND  
20.    
MONDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW. LOWS AROUND 5. HIGHS  
IN THE LOWER 20S.  
 

 
 
WYZ310-202300-  
PLATTE/GOSHEN/CENTRAL AND EASTERN LARAMIE-  
201 AM MDT TUE OCT 20 2020  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MAX TEMPERATURE.....49-57.  
24 HR TREND......13 DEGREES COOLER.  
MIN HUMIDITY........38-44 PERCENT.  
24 HR TREND......4 PERCENT WETTER.  
20-FOOT WINDS.......NORTH 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.......800-1900 FT AGL INCREASING TO 3400-5400 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR TO GOOD (27900-67100 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MIN TEMPERATURE.....31-36.  
24 HR TREND......4 DEGREES COOLER.  
MAX HUMIDITY........86-92 PERCENT.  
24 HR TREND......UNCHANGED.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......EAST AROUND 5 MPH SHIFTING TO THE SOUTH AND  
GUSTY AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....EAST AROUND 10 MPH INCREASING TO SOUTH AROUND  
20 MPH AFTER MIDNIGHT.  
MIXING HEIGHT.......400-2000 FT AGL.  
SMOKE DISPERSAL.....POOR (11300-12400 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY UNTIL 1500, THEN PARTLY CLOUDY.  
MAX TEMPERATURE.....68-74.  
24 HR TREND......19 DEGREES WARMER.  
MIN HUMIDITY........15-21 PERCENT.  
24 HR TREND......23 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST AROUND 10 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 20 TO 25 MPH.  
MIXING HEIGHT.......600-1100 FT AGL INCREASING TO 8700-10000 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (13000 KNOT-FT) INCREASING TO EXCELLENT  
(219500 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
MUCH COLDER. PARTLY CLOUDY WITH CHANCE OF SNOW AND  
RAIN. LOWS IN THE LOWER 30S. HIGHS IN THE LOWER 40S. NORTHWEST  
WINDS AROUND 10 MPH.    
FRIDAY
 
PARTLY CLOUDY. CHANCE OF SNOW. LOWS AROUND 15. HIGHS IN  
THE MID 30S. NORTHEAST WINDS AROUND 10 MPH.    
SATURDAY
 
MOSTLY CLOUDY WITH CHANCE OF RAIN AND SNOW. LOWS IN  
THE LOWER 20S. HIGHS IN THE LOWER 40S. SOUTHEAST WINDS AROUND  
10 MPH.    
SUNDAY
 
COLDER. SNOW LIKELY. LOWS AROUND 13. HIGHS IN THE LOWER  
20S.    
MONDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW. LOWS AROUND 5. HIGHS  
IN THE MID 20S.  
 

 
 
NEZ311-202300-  
PINE RIDGE/NEBRASKA NATIONAL FOREST/OGLALA NATIONAL GRASSLANDS-  
201 AM MDT TUE OCT 20 2020  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 0900, THEN PARTLY CLOUDY.  
SLIGHT CHANCE OF RAIN AFTER 1700.  
MAX TEMPERATURE.....48-53.  
24 HR TREND......8 DEGREES WARMER.  
MIN HUMIDITY........48-54 PERCENT.  
24 HR TREND......22 PERCENT DRIER.  
20-FOOT WINDS.......NORTHWEST 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.....NORTHWEST 20 TO 25 MPH.  
MIXING HEIGHT.......700-1200 FT AGL INCREASING TO 3800-4500 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (18200 KNOT-FT) INCREASING TO GOOD (90900  
KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 0300, THEN PARTLY CLOUDY.  
SLIGHT CHANCE OF RAIN. SLIGHT CHANCE OF SNOW  
AFTER 0400.  
MIN TEMPERATURE.....30-35.  
24 HR TREND......3 DEGREES WARMER.  
MAX HUMIDITY........92-98 PERCENT.  
24 HR TREND......UNCHANGED.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTH AROUND 5 MPH SHIFTING TO THE SOUTHEAST  
AND GUSTY AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH INCREASING TO SOUTH  
AROUND 20 MPH AFTER MIDNIGHT.  
MIXING HEIGHT.......400-1700 FT AGL.  
SMOKE DISPERSAL.....POOR (7300-10700 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 0900, THEN MOSTLY SUNNY.  
MAX TEMPERATURE.....61-69.  
24 HR TREND......20 DEGREES WARMER.  
MIN HUMIDITY........29-35 PERCENT.  
24 HR TREND......30 PERCENT DRIER.  
20-FOOT WINDS.......SOUTH AROUND 10 MPH. GUSTS UP TO 30 MPH  
DECREASING TO 20 MPH IN THE AFTERNOON.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 20 TO 25 MPH.  
MIXING HEIGHT.......700-1200 FT AGL INCREASING TO 5900-7900 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (18200 KNOT-FT) INCREASING TO VERY GOOD  
(100300 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
MUCH COLDER. MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW.  
LOWS IN THE LOWER 30S. HIGHS IN THE UPPER 30S. NORTH WINDS AROUND  
10 MPH.    
FRIDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW. LOWS AROUND 16.  
HIGHS IN THE MID 30S. NORTHEAST WINDS AROUND 10 MPH.    
SATURDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW. LOWS IN THE LOWER  
20S. HIGHS IN THE UPPER 30S. SOUTHEAST WINDS AROUND 10 MPH.    
SUNDAY
 
COLDER. CLOUDY WITH SNOW LIKELY. LOWS AROUND 14. HIGHS  
IN THE MID 20S.    
MONDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW. LOWS AROUND 5. HIGHS  
IN THE MID 20S.  
 

 
 
NEZ312-202300-  
BOX BUTTE/SOUTH SIOUX-  
201 AM MDT TUE OCT 20 2020  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MAX TEMPERATURE.....52-57.  
24 HR TREND......4 DEGREES COOLER.  
MIN HUMIDITY........39-45 PERCENT.  
24 HR TREND......1 PERCENT WETTER.  
20-FOOT WINDS.......NORTHWEST AROUND 10 MPH INCREASING TO NORTH  
AROUND 20 MPH IN THE AFTERNOON. GUSTS UP TO 35  
MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST 20 TO 25 MPH.  
MIXING HEIGHT.......700-1200 FT AGL INCREASING TO 4300-4800 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (17800 KNOT-FT) INCREASING TO GOOD (96400  
KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY UNTIL 2100, THEN MOSTLY CLOUDY  
UNTIL 2400, THEN PARTLY CLOUDY.  
MIN TEMPERATURE.....30-35.  
24 HR TREND......1 DEGREE WARMER.  
MAX HUMIDITY........91-97 PERCENT.  
24 HR TREND......4 PERCENT DRIER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTHEAST AROUND 5 MPH SHIFTING TO THE  
SOUTHEAST AND GUSTY AFTER MIDNIGHT.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH INCREASING TO SOUTH  
AROUND 20 MPH AFTER MIDNIGHT.  
MIXING HEIGHT.......700-1700 FT AGL.  
SMOKE DISPERSAL.....POOR (10100-11200 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....69-74.  
24 HR TREND......19 DEGREES WARMER.  
MIN HUMIDITY........20-26 PERCENT.  
24 HR TREND......21 PERCENT DRIER.  
20-FOOT WINDS.......SOUTH 10 TO 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 25 MPH.  
MIXING HEIGHT.......700-1200 FT AGL INCREASING TO 7900-9200 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (18500 KNOT-FT) INCREASING TO EXCELLENT  
(183800 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
MUCH COLDER. PARTLY CLOUDY. CHANCE OF SNOW AND SLIGHT  
CHANCE OF RAIN. LOWS IN THE LOWER 30S. HIGHS IN THE LOWER 40S.  
NORTHWEST WINDS AROUND 15 MPH.    
FRIDAY
 
MOSTLY CLOUDY. CHANCE OF SNOW. LOWS AROUND 15. HIGHS IN  
THE MID 30S. NORTHEAST WINDS AROUND 10 MPH.    
SATURDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW AND RAIN. LOWS  
AROUND 20. HIGHS IN THE UPPER 30S. SOUTHEAST WINDS AROUND 10 MPH.   
SUNDAY
 
COLDER. CLOUDY WITH SNOW LIKELY. LOWS AROUND 14. HIGHS  
IN THE MID 20S.    
MONDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW. LOWS AROUND 4. HIGHS  
IN THE MID 20S.  
 

 
 
NEZ313-202300-  
SCOTTS BLUFF NATIONAL MONUMENT/WILDCAT HILLS-  
201 AM MDT TUE OCT 20 2020  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MAX TEMPERATURE.....56-61.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........34-40 PERCENT.  
24 HR TREND......4 PERCENT DRIER.  
20-FOOT WINDS.......NORTHWEST AROUND 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.......700-1400 FT AGL INCREASING TO 4300-5300 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (21800 KNOT-FT) INCREASING TO GOOD (84400  
KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
MIN TEMPERATURE.....31-36.  
24 HR TREND......1 DEGREE COOLER.  
MAX HUMIDITY........91-97 PERCENT.  
24 HR TREND......UNCHANGED.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTHEAST AROUND 5 MPH SHIFTING TO THE  
SOUTHEAST AFTER MIDNIGHT. GUSTS UP TO 25 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH INCREASING TO SOUTH  
AROUND 20 MPH AFTER MIDNIGHT.  
MIXING HEIGHT.......600-1900 FT AGL.  
SMOKE DISPERSAL.....POOR (13000-15600 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....70-75.  
24 HR TREND......12 DEGREES WARMER.  
MIN HUMIDITY........21-27 PERCENT.  
24 HR TREND......15 PERCENT DRIER.  
20-FOOT WINDS.......SOUTH AROUND 15 MPH WITH HIGHER GUSTS.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 20 TO 25 MPH.  
MIXING HEIGHT.......700-1200 FT AGL INCREASING TO 6800-8800 FT AGL  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (19000 KNOT-FT) INCREASING TO VERY GOOD  
(134600 KNOT-FT) IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FORECAST DAYS 3 THROUGH 7
 
   
THURSDAY
 
MUCH COOLER. PARTLY CLOUDY WITH CHANCE OF SNOW AND  
SLIGHT CHANCE OF RAIN. LOWS IN THE MID 30S. HIGHS IN THE UPPER  
40S. NORTHWEST WINDS AROUND 15 MPH.    
FRIDAY
 
COLDER. PARTLY CLOUDY. CHANCE OF SNOW. LOWS AROUND 16.  
HIGHS IN THE MID 30S. NORTHEAST WINDS AROUND 10 MPH.    
SATURDAY
 
MOSTLY CLOUDY. CHANCE OF SNOW AND SLIGHT CHANCE OF  
RAIN. LOWS IN THE LOWER 20S. HIGHS IN THE MID 40S. SOUTHEAST  
WINDS AROUND 10 MPH.    
SUNDAY
 
COLDER. CLOUDY WITH SNOW LIKELY AND CHANCE OF RAIN.  
LOWS AROUND 17. HIGHS IN THE MID 20S.    
MONDAY
 
MOSTLY CLOUDY WITH CHANCE OF SNOW. LOWS AROUND 8. HIGHS  
IN THE MID 20S.  
 

 
 
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