245  
FNUS55 KRIW 150954  
FWFRIW  
 
FIRE WEATHER PLANNING FORECAST FOR WESTERN AND CENTRAL WYOMING  
NATIONAL WEATHER SERVICE RIVERTON WY  
354 AM MDT MON SEP 15 2025  
   
DISCUSSION
 
 
...YELLOWSTONE NP AND TETON DISPATCH AREAS (INCLUDES FIRE WEATHER  
ZONES 140...414...415...AND 416)...  
 
SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE AREA TODAY. A  
FEW THUNDERSTORMS COULD PRODUCE GUSTY WINDS TO 40 MPH DURING THE  
AFTERNOON, ALONG WITH SOME GRAUPEL. INCREASED CLOUD COVER WILL  
KEEP TEMPERATURES 5 TO 10 DEGREES COOLER THAN YESTERDAY. COLDER  
TEMPERATURES OVERNIGHT WILL BRING THE SNOW LEVEL TO AROUND 9000  
FT, WITH LIGHT ACCUMULATIONS POSSIBLE. SHOWERS AND THUNDERSTORMS  
WILL AGAIN BE POSSIBLE ON TUESDAY, MAINLY FOR YELLOWSTONE NP.  
   
..CODY DISPATCH AREA (INCLUDES FIRE WEATHER ZONES 275...276
 
 
282...283...285...286...287...288...AND 289)...  
 
SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE AREA TODAY. A  
FEW THUNDERSTORMS COULD PRODUCE GUSTY WINDS TO 40 MPH DURING THE  
AFTERNOON, ALONG WITH SOME GRAUPEL AT HIGHER ELEVATIONS.  
INCREASED CLOUD COVER WILL KEEP TEMPERATURES 5 TO 10 DEGREES  
COOLER THAN YESTERDAY. SHOWERS AND THUNDERSTORMS WILL AGAIN BE  
POSSIBLE ON TUESDAY.  
   
..CASPER DISPATCH AREA (INCLUDES FIRE WEATHER ZONES 277...278
 
 
279...280...281...285...289...AND 300)...  
 
SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE AREA TODAY. A  
FEW THUNDERSTORMS COULD PRODUCE GUSTY WINDS TO 40 MPH DURING THE  
AFTERNOON. INCREASED CLOUD COVER WILL KEEP TEMPERATURES 5 TO 10  
DEGREES COOLER THAN YESTERDAY. SHOWERS AND THUNDERSTORMS WILL  
AGAIN BE POSSIBLE ON TUESDAY.  
   
..THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS
 
 
WYZ280-161200-  
NATRONA COUNTY/CASPER BLM-  
INCLUDING THE CITIES OF CASPER AND MIDWEST  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS EARLY IN THE  
MORNING. ISOLATED SHOWERS AND THUNDERSTORMS  
EARLY IN THE AFTERNOON. SOME THUNDERSTORMS MAY  
BE SEVERE. CHANCE OF PRECIPITATION 20 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....70-75.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........24-30 PERCENT.  
24 HR TREND......6 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO  
AROUND 25 MPH UNTIL 1200, THEN WEST AROUND 20  
MPH WITH GUSTS TO AROUND 35 MPH.  
RIDGE TOP WINDS.....SOUTHWEST AROUND 15 MPH UNTIL 1200, THEN WEST  
AROUND 25 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 20 TO 25 MPH.  
MIXING HEIGHT.......1400-3400 FT AGL UNTIL 1200, THEN 7400-9400 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 1200, THEN EXCELLENT.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED THUNDERSTORMS EARLY IN  
THE EVENING. ISOLATED SHOWERS IN THE EVENING.  
ISOLATED SHOWERS AFTER MIDNIGHT. SOME  
THUNDERSTORMS MAY BE SEVERE. CHANCE OF  
PRECIPITATION 20 PERCENT.  
CHANCE OF THUNDER...10 PERCENT.  
MIN TEMPERATURE.....42-47.  
24 HR TREND......7 DEGREES COOLER.  
MAX HUMIDITY........82-88 PERCENT.  
24 HR TREND......42 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTHWEST WINDS AROUND 15 MPH WITH GUSTS TO  
AROUND 35 MPH UNTIL 2100, THEN NORTHEAST WITH  
GUSTS TO AROUND 35 MPH UNTIL 2400, THEN  
DOWNSLOPE/DOWNVALLEY 4-7 MPH.  
RIDGE TOP WINDS.....NORTH 10 TO 15 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTH 10 TO 15 MPH.  
MIXING HEIGHT.......1600-3600 FT AGL UNTIL 2400, THEN 400-600 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 2400, THEN POOR.  
   
TUESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS EARLY IN THE  
MORNING. SCATTERED SHOWERS LATE IN THE MORNING.  
ISOLATED THUNDERSTORMS IN THE AFTERNOON. CHANCE  
OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....65-70.  
24 HR TREND......6 DEGREES COOLER.  
MIN HUMIDITY........39-45 PERCENT.  
24 HR TREND......18 PERCENT WETTER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 0900, THEN  
NORTHEAST AROUND 10 MPH WITH GUSTS TO AROUND 25  
MPH.  
RIDGE TOP WINDS.....NORTH 10 TO 15 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 30 PERCENT.  
TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.  
MIXING HEIGHT.......800-2800 FT AGL UNTIL 1200, THEN 4000-6000 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
MOSTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS IN THE EVENING, THEN SCATTERED SHOWERS AFTER  
MIDNIGHT. LOWS IN THE UPPER 40S. NORTH WINDS AROUND 10 MPH.    
WEDNESDAY
 
MOSTLY CLOUDY. NUMEROUS SHOWERS AND ISOLATED  
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 60S.  
NORTH WINDS AROUND 10 MPH.    
THURSDAY
 
MOSTLY CLEAR. ISOLATED SHOWERS AND THUNDERSTORMS.  
LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 60S. WINDS GENERALLY  
LESS THAN 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE LOWER  
70S. WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY THROUGH SUNDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S.  
HIGHS IN THE UPPER 70S.  
 

 
 
WYZ283-161200-  
UPPER WIND RIVER BASIN/WIND RIVER BASIN-  
INCLUDING THE CITIES OF CROWHEART, LANDER, RIVERTON, AND SHOSHONI  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED THUNDERSTORMS IN THE  
MORNING. SCATTERED SHOWERS THROUGH THE DAY.  
SCATTERED THUNDERSTORMS IN THE AFTERNOON.  
CHANCE OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...30 PERCENT.  
MAX TEMPERATURE.....64-69.  
24 HR TREND......5 DEGREES COOLER.  
MIN HUMIDITY........31-37 PERCENT.  
24 HR TREND......10 PERCENT WETTER.  
20-FOOT WINDS.......WEST WINDS 10 TO 15 MPH. GUSTS UP TO 20 MPH  
UNTIL 1200, THEN 30 MPH.  
RIDGE TOP WINDS.....WEST 15 TO 20 MPH.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....WEST 15 TO 20 MPH.  
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 1200, THEN 5800-7800 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 1200, THEN VERY GOOD.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS AND  
THUNDERSTORMS EARLY IN THE EVENING. ISOLATED  
SHOWERS AFTER MIDNIGHT. SOME THUNDERSTORMS MAY  
BE SEVERE EARLY IN THE EVENING. CHANCE OF  
PRECIPITATION 20 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MIN TEMPERATURE.....41-46.  
24 HR TREND......6 DEGREES COOLER.  
MAX HUMIDITY........76-82 PERCENT.  
24 HR TREND......22 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO  
AROUND 25 MPH UNTIL 0300, THEN  
DOWNSLOPE/DOWNVALLEY 4-7 MPH.  
RIDGE TOP WINDS.....NORTHWEST 10 TO 15 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.  
MIXING HEIGHT.......2000-4000 FT AGL UNTIL 2400, THEN 600-800 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
   
TUESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS EARLY IN THE  
MORNING. SCATTERED SHOWERS IN THE LATE MORNING  
AND AFTERNOON. ISOLATED THUNDERSTORMS IN THE  
AFTERNOON. CHANCE OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....63-68.  
24 HR TREND......2 DEGREES COOLER.  
MIN HUMIDITY........41-47 PERCENT.  
24 HR TREND......8 PERCENT WETTER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 1200, THEN  
NORTHEAST AROUND 10 MPH. GUSTS UP TO 20 MPH.  
RIDGE TOP WINDS.....NORTH 10 TO 15 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 10 PERCENT.  
TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.  
MIXING HEIGHT.......1000-3000 FT AGL UNTIL 1200, THEN 4600-6600 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS IN THE EVENING, THEN ISOLATED SHOWERS AFTER  
MIDNIGHT. LOWS IN THE MID 40S. NORTH WINDS AROUND 10 MPH.    
WEDNESDAY
 
PARTLY CLOUDY WITH ISOLATED SHOWERS AND  
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE MID 60S. WINDS  
GENERALLY LESS THAN 10 MPH.    
THURSDAY
 
CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 70S.  
WINDS GENERALLY LESS THAN 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE MID  
70S. WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE  
UPPER 70S.    
SUNDAY
 
MOSTLY SUNNY. ISOLATED SHOWERS AND THUNDERSTORMS IN THE  
AFTERNOON. HIGHS IN THE UPPER 70S.  
 

 
 
WYZ285-161200-  
SOUTH BIGHORN MOUNTAINS-  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. SCATTERED SHOWERS THROUGH THE  
DAY. ISOLATED THUNDERSTORMS IN THE AFTERNOON.  
SOME THUNDERSTORMS MAY BE SEVERE EARLY IN THE  
AFTERNOON. CHANCE OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....62-67.  
24 HR TREND......4 DEGREES COOLER.  
MIN HUMIDITY........32-38 PERCENT.  
24 HR TREND......11 PERCENT WETTER.  
20-FOOT WINDS.......WEST WINDS 10 TO 15 MPH WITH GUSTS TO AROUND 25  
MPH.  
RIDGE TOP WINDS.....WEST 15 TO 20 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 15 PERCENT.  
TRANSPORT WINDS.....WEST AROUND 20 MPH.  
MIXING HEIGHT.......800-2800 FT AGL UNTIL 1200, THEN 4600-6600 FT  
AGL.  
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN GOOD TO VERY GOOD.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS IN THE EVENING. ISOLATED SHOWERS  
AFTER MIDNIGHT. SOME THUNDERSTORMS MAY BE  
SEVERE. CHANCE OF PRECIPITATION 40 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MIN TEMPERATURE.....41-46.  
24 HR TREND......8 DEGREES COOLER.  
MAX HUMIDITY........78-84 PERCENT.  
24 HR TREND......37 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTHWEST WINDS AROUND 10 MPH WITH GUSTS TO  
AROUND 25 MPH UNTIL 0300, THEN  
DOWNSLOPE/DOWNVALLEY 4-7 MPH.  
RIDGE TOP WINDS.....NORTHWEST AROUND 15 MPH.  
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH.  
MIXING HEIGHT.......800-2800 FT AGL UNTIL 2400, THEN 200-600 FT  
AGL.  
SMOKE DISPERSAL.....POOR.  
   
TUESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS EARLY IN THE  
MORNING. SCATTERED SHOWERS IN THE LATE MORNING  
AND AFTERNOON. ISOLATED THUNDERSTORMS IN THE  
AFTERNOON. CHANCE OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....58-63.  
24 HR TREND......4 DEGREES COOLER.  
MIN HUMIDITY........47-53 PERCENT.  
24 HR TREND......13 PERCENT WETTER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 0900, THEN NORTH  
AROUND 10 MPH. GUSTS UP TO 20 MPH.  
RIDGE TOP WINDS.....NORTH 10 TO 15 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 35 PERCENT.  
TRANSPORT WINDS.....NORTH 10 TO 15 MPH.  
MIXING HEIGHT.......600-2600 FT AGL UNTIL 1200, THEN 3400-5400 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
MOSTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS IN THE EVENING, THEN SCATTERED SHOWERS AFTER  
MIDNIGHT. LOWS IN THE MID 40S. NORTH WINDS AROUND 10 MPH.    
WEDNESDAY
 
PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE UPPER 50S. NORTH  
WINDS AROUND 10 MPH.    
THURSDAY
 
MOSTLY CLEAR. ISOLATED SHOWERS AND THUNDERSTORMS.  
LOWS IN THE MID 40S. HIGHS IN THE LOWER 60S. WINDS GENERALLY LESS  
THAN 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE UPPER  
60S. WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY THROUGH SUNDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S.  
HIGHS IN THE LOWER 70S.  
 

 
 
WYZ281-161200-  
JOHNSON COUNTY/CASPER BLM-  
INCLUDING THE CITIES OF BUFFALO AND KAYCEE  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS IN THE AFTERNOON. SOME  
THUNDERSTORMS MAY BE SEVERE EARLY IN THE  
AFTERNOON. CHANCE OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....69-74.  
24 HR TREND......3 DEGREES COOLER.  
MIN HUMIDITY........29-35 PERCENT.  
24 HR TREND......4 PERCENT WETTER.  
20-FOOT WINDS.......WEST WINDS AROUND 10 MPH WITH GUSTS TO AROUND  
25 MPH UNTIL 1500, THEN NORTHWEST WITH GUSTS TO  
AROUND 25 MPH.  
RIDGE TOP WINDS.....WEST AROUND 15 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 10 PERCENT.  
TRANSPORT WINDS.....WEST 15 TO 20 MPH.  
MIXING HEIGHT.......1600-3600 FT AGL UNTIL 1200, THEN 5600-7600 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 1200, THEN GOOD TO VERY  
GOOD.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. SCATTERED SHOWERS EARLY IN THE  
EVENING. ISOLATED THUNDERSTORMS IN THE EVENING.  
ISOLATED SHOWERS UNTIL EARLY MORNING. SOME  
THUNDERSTORMS MAY BE SEVERE EARLY IN THE  
EVENING. CHANCE OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MIN TEMPERATURE.....45-50.  
24 HR TREND......5 DEGREES COOLER.  
MAX HUMIDITY........81-87 PERCENT.  
24 HR TREND......39 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTHWEST WINDS 10 TO 15 MPH UNTIL 0300, THEN  
DOWNSLOPE/DOWNVALLEY 4-7 MPH. GUSTS UP TO 25  
MPH.  
RIDGE TOP WINDS.....NORTHWEST AROUND 15 MPH.  
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH.  
MIXING HEIGHT.......800-2800 FT AGL UNTIL 2400, THEN 400-800 FT  
AGL.  
SMOKE DISPERSAL.....POOR.  
   
TUESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.  
ISOLATED SHOWERS IN THE MORNING. SCATTERED  
SHOWERS LATE IN THE MORNING. ISOLATED  
THUNDERSTORMS IN THE AFTERNOON. CHANCE OF  
PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....61-66.  
24 HR TREND......6 DEGREES COOLER.  
MIN HUMIDITY........50-56 PERCENT.  
24 HR TREND......18 PERCENT WETTER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 0900, THEN NORTH  
AROUND 10 MPH WITH GUSTS TO AROUND 25 MPH.  
RIDGE TOP WINDS.....NORTH AROUND 15 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 30 PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 15 MPH.  
MIXING HEIGHT.......1000-3000 FT AGL UNTIL 1200, THEN 4200-6200 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
MOSTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS IN THE EVENING, THEN SCATTERED SHOWERS AFTER  
MIDNIGHT. LOWS IN THE UPPER 40S. NORTH WINDS AROUND 10 MPH.    
WEDNESDAY
 
PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE MID 60S.  
NORTHWEST WINDS AROUND 10 MPH.    
THURSDAY
 
MOSTLY CLEAR. ISOLATED SHOWERS AND THUNDERSTORMS.  
LOWS IN THE MID 40S. HIGHS AROUND 70. WINDS GENERALLY LESS THAN  
10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE LOWER  
70S. WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY THROUGH SUNDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S.  
HIGHS 77 TO 82.  
 

 
 
WYZ282-161200-  
SOUTH BIGHORN BASIN/WORLAND BLM-  
INCLUDING THE CITIES OF TEN SLEEP, THERMOPOLIS, AND WORLAND  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED THUNDERSTORMS IN THE  
MORNING. SCATTERED SHOWERS THROUGH THE DAY.  
SCATTERED THUNDERSTORMS IN THE AFTERNOON.  
CHANCE OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...30 PERCENT.  
MAX TEMPERATURE.....63-68.  
24 HR TREND......7 DEGREES COOLER.  
MIN HUMIDITY........35-41 PERCENT.  
24 HR TREND......16 PERCENT WETTER.  
20-FOOT WINDS.......SOUTH WINDS AROUND 10 MPH AND GUSTY UNTIL 1200,  
THEN NORTH WITH GUSTS TO AROUND 25 MPH.  
RIDGE TOP WINDS.....SOUTH AROUND 15 MPH UNTIL 1200, THEN NORTHWEST.  
CHC OF WETTING RAIN.5 PERCENT UNTIL 1200, THEN 20 PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH.  
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 1200, THEN 4000-6000 FT  
AGL.  
SMOKE DISPERSAL.....FAIR TO GOOD.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS EARLY IN THE EVENING, THEN  
ISOLATED SHOWERS LATE IN THE EVENING. ISOLATED  
SHOWERS AFTER MIDNIGHT. SOME THUNDERSTORMS MAY  
BE SEVERE. CHANCE OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MIN TEMPERATURE.....40-45.  
24 HR TREND......6 DEGREES COOLER.  
MAX HUMIDITY........80-86 PERCENT.  
24 HR TREND......31 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTHWEST WINDS AROUND 10 MPH UNTIL 2400, THEN  
WEST UNTIL 0300, THEN DOWNSLOPE/DOWNVALLEY 4-7  
MPH. GUSTS UP TO 20 MPH.  
RIDGE TOP WINDS.....NORTHWEST AROUND 15 MPH UNTIL 2400, THEN  
SOUTHWEST.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.  
MIXING HEIGHT.......800-2800 FT AGL UNTIL 2400, THEN 600-800 FT  
AGL.  
SMOKE DISPERSAL.....POOR.  
   
TUESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS EARLY IN THE  
MORNING. SCATTERED SHOWERS. ISOLATED  
THUNDERSTORMS IN THE AFTERNOON. CHANCE OF  
PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....61-66.  
24 HR TREND......2 DEGREES COOLER.  
MIN HUMIDITY........41-47 PERCENT.  
24 HR TREND......4 PERCENT WETTER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 1200, THEN NORTH  
AROUND 10 MPH. GUSTS UP TO 20 MPH.  
RIDGE TOP WINDS.....WEST AROUND 10 MPH UNTIL 1200, THEN NORTH.  
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 15 PERCENT.  
TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.  
MIXING HEIGHT.......800-2800 FT AGL UNTIL 1200, THEN 4200-6200 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS IN THE EVENING, THEN ISOLATED SHOWERS AFTER  
MIDNIGHT. LOWS IN THE UPPER 40S. NORTHWEST WINDS AROUND 10 MPH.    
WEDNESDAY
 
PARTLY CLOUDY WITH SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE UPPER 60S. WINDS  
GENERALLY LESS THAN 10 MPH.    
THURSDAY
 
CLEAR. LOWS IN THE MID 40S. HIGHS IN THE LOWER 70S.  
WINDS GENERALLY LESS THAN 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE MID  
70S. WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY
 
MOSTLY CLEAR. LOWS AROUND 50. HIGHS IN THE UPPER 70S.   
SUNDAY
 
MOSTLY SUNNY. ISOLATED SHOWERS IN THE AFTERNOON. HIGHS  
AROUND 80.  
 

 
 
WYZ275-161200-  
NORTH BIGHORN BASIN/WORLAND BLM-  
INCLUDING THE CITIES OF GREYBULL, LOVELL, AND POWELL  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED THUNDERSTORMS IN THE  
MORNING. SCATTERED SHOWERS THROUGH THE DAY.  
SCATTERED THUNDERSTORMS IN THE AFTERNOON.  
CHANCE OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...30 PERCENT.  
MAX TEMPERATURE.....61-66.  
24 HR TREND......7 DEGREES COOLER.  
MIN HUMIDITY........37-43 PERCENT.  
24 HR TREND......16 PERCENT WETTER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 1200, THEN EAST  
AROUND 10 MPH WITH GUSTS TO AROUND 25 MPH UNTIL  
1500, THEN NORTHWEST WITH GUSTS TO AROUND 25  
MPH.  
RIDGE TOP WINDS.....SOUTH AROUND 10 MPH UNTIL 1200, THEN NORTH.  
CHC OF WETTING RAIN.5 PERCENT UNTIL 1200, THEN 15 PERCENT.  
TRANSPORT WINDS.....SOUTH AROUND 10 MPH UNTIL 1200, THEN WEST.  
MIXING HEIGHT.......600-2600 FT AGL UNTIL 1200, THEN 3200-5200 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED THUNDERSTORMS IN THE  
EVENING. SCATTERED SHOWERS THROUGH THE NIGHT.  
CHANCE OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MIN TEMPERATURE.....41-46.  
24 HR TREND......5 DEGREES COOLER.  
MAX HUMIDITY........80-86 PERCENT.  
24 HR TREND......27 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO  
AROUND 25 MPH.  
RIDGE TOP WINDS.....NORTHWEST 15 TO 20 MPH.  
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.  
TRANSPORT WINDS.....NORTHWEST 15 TO 20 MPH.  
MIXING HEIGHT.......600-2600 FT AGL.  
SMOKE DISPERSAL.....POOR.  
   
TUESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. SCATTERED SHOWERS THROUGH THE  
DAY. ISOLATED THUNDERSTORMS IN THE AFTERNOON.  
CHANCE OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....58-63.  
24 HR TREND......2 DEGREES COOLER.  
MIN HUMIDITY........46-52 PERCENT.  
24 HR TREND......4 PERCENT WETTER.  
20-FOOT WINDS.......NORTHWEST WINDS AROUND 10 MPH WITH HIGHER  
GUSTS.  
RIDGE TOP WINDS.....NORTHWEST AROUND 15 MPH.  
CHC OF WETTING RAIN.5 PERCENT UNTIL 1200, THEN 15 PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH.  
MIXING HEIGHT.......600-2600 FT AGL UNTIL 1200, THEN 3400-5400 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
PARTLY CLOUDY. ISOLATED SHOWERS AND  
THUNDERSTORMS IN THE EVENING, THEN ISOLATED SHOWERS AFTER  
MIDNIGHT. LOWS IN THE UPPER 40S. NORTH WINDS AROUND 10 MPH.    
WEDNESDAY
 
MOSTLY CLEAR WITH ISOLATED SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE LOWER 70S. WINDS  
GENERALLY LESS THAN 10 MPH.    
THURSDAY
 
CLEAR. LOWS IN THE MID 40S. HIGHS IN THE LOWER 70S.  
WINDS GENERALLY LESS THAN 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE MID  
70S. WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY
 
MOSTLY CLEAR. LOWS AROUND 50. HIGHS IN THE UPPER 70S.   
SUNDAY
 
MOSTLY SUNNY. ISOLATED SHOWERS AND THUNDERSTORMS IN THE  
AFTERNOON. HIGHS AROUND 80.  
 

 
 
WYZ276-161200-  
CODY FOOTHILLS-  
INCLUDING THE CITIES OF CLARK, CODY, AND MEETEETSE  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. ISOLATED THUNDERSTORMS IN THE  
MORNING. NUMEROUS SHOWERS THROUGH THE DAY.  
SCATTERED THUNDERSTORMS IN THE AFTERNOON.  
CHANCE OF PRECIPITATION 70 PERCENT.  
CHANCE OF THUNDER...30 PERCENT.  
MAX TEMPERATURE.....62-67.  
24 HR TREND......9 DEGREES COOLER.  
MIN HUMIDITY........43-49 PERCENT.  
24 HR TREND......20 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHWEST WINDS AROUND 10 MPH UNTIL 1200, THEN  
NORTHWEST. GUSTS UP TO 20 MPH.  
RIDGE TOP WINDS.....SOUTHWEST AROUND 15 MPH UNTIL 1200, THEN  
NORTHWEST.  
CHC OF WETTING RAIN.10 PERCENT UNTIL 1200, THEN 35 PERCENT.  
TRANSPORT WINDS.....WEST AROUND 15 MPH.  
MIXING HEIGHT.......2000-4000 FT AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED THUNDERSTORMS IN THE  
EVENING. SCATTERED SHOWERS THROUGH THE NIGHT.  
CHANCE OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MIN TEMPERATURE.....42-47.  
24 HR TREND......6 DEGREES COOLER.  
MAX HUMIDITY........74-80 PERCENT.  
24 HR TREND......19 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTHWEST WINDS AROUND 10 MPH UNTIL 2400, THEN  
DOWNSLOPE/DOWNVALLEY 4-7 MPH. GUSTS UP TO 20  
MPH.  
RIDGE TOP WINDS.....NORTHWEST 10 TO 15 MPH.  
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.  
TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.  
MIXING HEIGHT.......600-2600 FT AGL.  
SMOKE DISPERSAL.....POOR.  
   
TUESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. SCATTERED SHOWERS THROUGH THE  
DAY. ISOLATED THUNDERSTORMS IN THE AFTERNOON.  
CHANCE OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....61-66.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........49-55 PERCENT.  
24 HR TREND......3 PERCENT WETTER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 0900, THEN NORTH  
AROUND 10 MPH. GUSTS UP TO 20 MPH.  
RIDGE TOP WINDS.....NORTHWEST AROUND 10 MPH UNTIL 1200, THEN  
NORTHEAST.  
CHC OF WETTING RAIN.10 PERCENT UNTIL 1200, THEN 35 PERCENT.  
TRANSPORT WINDS.....NORTH 10 TO 15 MPH.  
MIXING HEIGHT.......800-2800 FT AGL UNTIL 1200, THEN 3200-5000 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
PARTLY CLOUDY. ISOLATED SHOWERS AND  
THUNDERSTORMS IN THE EVENING. LOWS IN THE UPPER 40S. NORTHWEST  
WINDS AROUND 10 MPH.    
WEDNESDAY
 
MOSTLY CLEAR. ISOLATED SHOWERS AND THUNDERSTORMS.  
LOWS IN THE MID 40S. HIGHS IN THE MID 60S. WINDS GENERALLY LESS  
THAN 10 MPH.    
THURSDAY
 
CLEAR. LOWS IN THE MID 40S. HIGHS IN THE UPPER 60S.  
WINDS GENERALLY LESS THAN 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS AROUND 50. HIGHS IN THE LOWER 70S.  
WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY
 
MOSTLY CLEAR. LOWS IN THE LOWER 50S. HIGHS IN THE MID  
70S.    
SUNDAY
 
MOSTLY SUNNY. ISOLATED SHOWERS AND THUNDERSTORMS IN THE  
AFTERNOON. HIGHS IN THE MID 70S.  
 

 
 
WYZ287-161200-  
OWL CREEK MOUNTAINS-  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED THUNDERSTORMS IN THE  
MORNING. NUMEROUS SHOWERS THROUGH THE DAY.  
SCATTERED THUNDERSTORMS IN THE AFTERNOON.  
CHANCE OF PRECIPITATION 70 PERCENT.  
CHANCE OF THUNDER...30 PERCENT.  
MAX TEMPERATURE.....60-65.  
24 HR TREND......6 DEGREES COOLER.  
MIN HUMIDITY........37-43 PERCENT.  
24 HR TREND......14 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHWEST WINDS 10 TO 15 MPH. GUSTS UP TO 15  
MPH UNTIL 1200, THEN 25 MPH.  
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.  
CHC OF WETTING RAIN.5 PERCENT UNTIL 1200, THEN 30 PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH.  
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 1200, THEN 3600-5600 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS EARLY IN THE EVENING. ISOLATED  
SHOWERS AFTER MIDNIGHT. CHANCE OF PRECIPITATION  
40 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MIN TEMPERATURE.....40-45.  
24 HR TREND......7 DEGREES COOLER.  
MAX HUMIDITY........75-81 PERCENT.  
24 HR TREND......22 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTHWEST WINDS 10 TO 15 MPH AND GUSTY.  
RIDGE TOP WINDS.....NORTHWEST AROUND 15 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH.  
MIXING HEIGHT.......1000-3000 FT AGL UNTIL 2400, THEN 200-800 FT  
AGL.  
SMOKE DISPERSAL.....POOR.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY.  
ISOLATED SHOWERS EARLY IN THE MORNING.  
SCATTERED SHOWERS EARLY IN THE MORNING.  
ISOLATED THUNDERSTORMS IN THE AFTERNOON. CHANCE  
OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....58-63.  
24 HR TREND......3 DEGREES COOLER.  
MIN HUMIDITY........47-53 PERCENT.  
24 HR TREND......7 PERCENT WETTER.  
20-FOOT WINDS.......NORTH WINDS AROUND 10 MPH UNTIL 1200, THEN  
NORTHEAST. GUSTS UP TO 20 MPH.  
RIDGE TOP WINDS.....NORTH AROUND 15 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 25 PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 15 MPH.  
MIXING HEIGHT.......800-2800 FT AGL UNTIL 1200, THEN 3600-5600 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS IN THE EVENING, THEN ISOLATED SHOWERS AFTER  
MIDNIGHT. LOWS IN THE MID 40S. NORTHWEST WINDS AROUND 10 MPH.    
WEDNESDAY
 
MOSTLY CLEAR WITH SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE LOWER 60S. NORTH  
WINDS AROUND 10 MPH.    
THURSDAY
 
CLEAR. LOWS IN THE MID 40S. HIGHS IN THE MID 60S.  
WINDS GENERALLY LESS THAN 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE UPPER  
60S. WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY
 
MOSTLY CLEAR. LOWS AROUND 50. HIGHS IN THE LOWER 70S.   
SUNDAY
 
MOSTLY SUNNY. ISOLATED SHOWERS AND THUNDERSTORMS IN THE  
AFTERNOON. HIGHS IN THE LOWER 70S.  
 

 
 
WYZ286-161200-  
ABSAROKA MOUNTAINS/NORTH SHOSHONE NF-  
INCLUDING THE CITY OF PAHASKA  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.  
NUMEROUS SHOWERS AND ISOLATED THUNDERSTORMS IN  
THE MORNING, THEN SHOWERS AND SCATTERED  
THUNDERSTORMS IN THE AFTERNOON. CHANCE OF  
PRECIPITATION 80 PERCENT.  
CHANCE OF THUNDER...40 PERCENT.  
MAX TEMPERATURE.....54-59.  
24 HR TREND......7 DEGREES COOLER.  
MIN HUMIDITY........43-49 PERCENT.  
24 HR TREND......10 PERCENT WETTER.  
20-FOOT WINDS.......WEST WINDS 10 TO 15 MPH WITH GUSTS TO AROUND 30  
MPH.  
RIDGE TOP WINDS.....WEST 15 TO 20 MPH.  
CHC OF WETTING RAIN.20 PERCENT.  
TRANSPORT WINDS.....WEST 15 TO 20 MPH.  
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 1200, THEN 4000-6000 FT  
AGL.  
SMOKE DISPERSAL.....FAIR TO GOOD.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS IN THE EVENING, THEN ISOLATED  
SHOWERS AND SNOW SHOWERS AFTER MIDNIGHT. CHANCE  
OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MIN TEMPERATURE.....38-43.  
24 HR TREND......5 DEGREES COOLER.  
MAX HUMIDITY........77-83 PERCENT.  
24 HR TREND......6 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......WEST WINDS AROUND 10 MPH WITH GUSTS TO AROUND  
25 MPH UNTIL 2400, THEN DOWNSLOPE/DOWNVALLEY  
4-7 MPH.  
RIDGE TOP WINDS.....NORTHWEST 10 TO 15 MPH.  
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.  
TRANSPORT WINDS.....WEST 10 TO 15 MPH.  
MIXING HEIGHT.......1600-3600 FT AGL UNTIL 2400, THEN 400-1000 FT  
AGL.  
SMOKE DISPERSAL.....POOR.  
   
TUESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. NUMEROUS SHOWERS AND SCATTERED  
SNOW SHOWERS IN THE MORNING, THEN SCATTERED  
SHOWERS AND ISOLATED THUNDERSTORMS IN THE  
AFTERNOON. NO SNOW ACCUMULATION. CHANCE OF  
PRECIPITATION 70 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....53-58.  
24 HR TREND......UNCHANGED.  
MIN HUMIDITY........51-57 PERCENT.  
24 HR TREND......6 PERCENT WETTER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 1200, THEN EAST  
AROUND 10 MPH. GUSTS UP TO 20 MPH.  
RIDGE TOP WINDS.....NORTHEAST 10 TO 15 MPH.  
CHC OF WETTING RAIN.10 PERCENT UNTIL 1200, THEN 35 PERCENT.  
TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.  
MIXING HEIGHT.......2000-4000 FT AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
PARTLY CLOUDY. ISOLATED SHOWERS AND  
THUNDERSTORMS IN THE EVENING. LOWS IN THE UPPER 30S. WINDS  
GENERALLY LESS THAN 10 MPH.    
WEDNESDAY
 
MOSTLY CLEAR. ISOLATED SHOWERS AND THUNDERSTORMS.  
LOWS IN THE UPPER 30S. HIGHS IN THE UPPER 50S. WINDS GENERALLY  
LESS THAN 10 MPH.    
THURSDAY
 
CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 60S.  
NORTHWEST WINDS AROUND 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE MID  
60S. WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY
 
MOSTLY CLEAR. ISOLATED SHOWERS AND THUNDERSTORMS.  
LOWS IN THE MID 40S. HIGHS IN THE MID 60S.    
SUNDAY
 
MOSTLY SUNNY. ISOLATED SHOWERS IN THE MORNING, THEN  
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS IN THE AFTERNOON.  
HIGHS IN THE MID 60S.  
 

 
 
WYZ140-161200-  
YELLOWSTONE NATIONAL PARK-  
INCLUDING THE CITIES OF LAKE, MAMMOTH, AND OLD FAITHFUL  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.  
ISOLATED THUNDERSTORMS IN THE MORNING. NUMEROUS  
SHOWERS THROUGH THE DAY. SCATTERED  
THUNDERSTORMS IN THE AFTERNOON. CHANCE OF  
PRECIPITATION 70 PERCENT.  
CHANCE OF THUNDER...40 PERCENT.  
MAX TEMPERATURE.....52-57.  
24 HR TREND......8 DEGREES COOLER.  
MIN HUMIDITY........46-52 PERCENT.  
24 HR TREND......12 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHWEST WINDS AROUND 10 MPH UNTIL 1500, THEN  
WEST. GUSTS UP TO 25 MPH.  
RIDGE TOP WINDS.....SOUTHWEST AROUND 15 MPH.  
CHC OF WETTING RAIN.25 PERCENT UNTIL 1200, THEN 10 PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH.  
MIXING HEIGHT.......1000-3000 FT AGL UNTIL 1200, THEN 4200-6200 FT  
AGL.  
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN GOOD.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED THUNDERSTORMS IN THE  
EVENING. SCATTERED SHOWERS THROUGH THE NIGHT.  
ISOLATED SNOW SHOWERS AFTER MIDNIGHT. CHANCE OF  
PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MIN TEMPERATURE.....34-39.  
24 HR TREND......4 DEGREES COOLER.  
MAX HUMIDITY........85-91 PERCENT.  
24 HR TREND......1 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH.  
RIDGE TOP WINDS.....NORTHWEST AROUND 10 MPH UNTIL 2400, THEN  
NORTHEAST.  
CHC OF WETTING RAIN.5 PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH UNTIL 2400, THEN NORTH.  
MIXING HEIGHT.......1600-3600 FT AGL UNTIL 2400, THEN 400-1000 FT  
AGL.  
SMOKE DISPERSAL.....POOR.  
   
TUESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. SCATTERED SHOWERS. ISOLATED  
THUNDERSTORMS IN THE AFTERNOON. ISOLATED  
SHOWERS LATE IN THE AFTERNOON. CHANCE OF  
PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....57-62.  
24 HR TREND......4 DEGREES WARMER.  
MIN HUMIDITY........46-52 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 1500, THEN NORTH  
AROUND 10 MPH. GUSTS UP TO 20 MPH.  
RIDGE TOP WINDS.....NORTHEAST AROUND 10 MPH.  
CHC OF WETTING RAIN.7 PERCENT.  
TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH.  
MIXING HEIGHT.......800-2800 FT AGL UNTIL 1200, THEN 3200-5200 FT  
AGL.  
SMOKE DISPERSAL.....POOR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
PARTLY CLOUDY. ISOLATED SHOWERS AND  
THUNDERSTORMS IN THE EVENING. LOWS IN THE MID 30S. WINDS  
GENERALLY LESS THAN 10 MPH.    
WEDNESDAY
 
MOSTLY CLEAR. ISOLATED SHOWERS AND THUNDERSTORMS.  
LOWS IN THE MID 30S. HIGHS IN THE LOWER 60S. WINDS GENERALLY LESS  
THAN 10 MPH.    
THURSDAY
 
CLEAR. LOWS IN THE MID 30S. HIGHS IN THE MID 60S.  
WINDS GENERALLY LESS THAN 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE UPPER  
60S. WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY
 
MOSTLY CLEAR. ISOLATED SHOWERS AND THUNDERSTORMS.  
LOWS IN THE UPPER 30S. HIGHS IN THE MID 60S.    
SUNDAY
 
MOSTLY SUNNY. ISOLATED SHOWERS IN THE MORNING, THEN  
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS IN THE AFTERNOON.  
HIGHS IN THE MID 60S.  
 

 
 
WYZ415-161200-  
NORTH ZONE BRIDGER TETON NF AND GRAND TETON NP-  
INCLUDING THE CITIES OF JACKSON AND MORAN  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.  
NUMEROUS SHOWERS AND ISOLATED THUNDERSTORMS IN  
THE MORNING, THEN SCATTERED SHOWERS AND  
THUNDERSTORMS IN THE AFTERNOON. CHANCE OF  
PRECIPITATION 70 PERCENT.  
CHANCE OF THUNDER...40 PERCENT.  
MAX TEMPERATURE.....54-59.  
24 HR TREND......8 DEGREES COOLER.  
MIN HUMIDITY........42-48 PERCENT.  
24 HR TREND......8 PERCENT WETTER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 0900, THEN  
SOUTHWEST AROUND 10 MPH. GUSTS UP TO 25 MPH.  
RIDGE TOP WINDS.....SOUTH AROUND 10 MPH UNTIL 1200, THEN WEST.  
CHC OF WETTING RAIN.45 PERCENT UNTIL 1200, THEN 10 PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH.  
MIXING HEIGHT.......1000-3000 FT AGL UNTIL 1200, THEN 4400-6400 FT  
AGL.  
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN GOOD.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS AND  
THUNDERSTORMS EARLY IN THE EVENING. CHANCE OF  
PRECIPITATION 20 PERCENT.  
CHANCE OF THUNDER...10 PERCENT.  
MIN TEMPERATURE.....33-38.  
24 HR TREND......5 DEGREES COOLER.  
MAX HUMIDITY........75-81 PERCENT.  
24 HR TREND......9 PERCENT DRIER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......WEST WINDS AROUND 10 MPH AND GUSTY UNTIL 2100,  
THEN DOWNSLOPE/DOWNVALLEY 4-7 MPH.  
RIDGE TOP WINDS.....NORTHWEST AROUND 10 MPH UNTIL 2400, THEN  
NORTHEAST.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH UNTIL 2400, THEN  
NORTHEAST.  
MIXING HEIGHT.......2400-4400 FT AGL UNTIL 2400, THEN 400-1000 FT  
AGL.  
SMOKE DISPERSAL.....POOR.  
   
TUESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS IN THE LATE  
MORNING AND AFTERNOON. ISOLATED THUNDERSTORMS  
IN THE AFTERNOON. CHANCE OF PRECIPITATION 20  
PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....58-63.  
24 HR TREND......4 DEGREES WARMER.  
MIN HUMIDITY........40-46 PERCENT.  
24 HR TREND......5 PERCENT DRIER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 1500, THEN NORTH  
AROUND 10 MPH. GUSTS UP TO 15 MPH.  
RIDGE TOP WINDS.....NORTHEAST AROUND 10 MPH.  
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.  
TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH.  
MIXING HEIGHT.......1000-3000 FT AGL UNTIL 1200, THEN 4400-6400 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
MOSTLY CLEAR. ISOLATED SHOWERS AND THUNDERSTORMS  
IN THE EVENING. LOWS IN THE MID 30S. WINDS GENERALLY LESS THAN  
10 MPH.    
WEDNESDAY
 
MOSTLY CLEAR. ISOLATED SHOWERS AND THUNDERSTORMS.  
LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 60S. WINDS GENERALLY  
LESS THAN 10 MPH.    
THURSDAY
 
CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE MID 60S.  
WINDS GENERALLY LESS THAN 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS AROUND 40. HIGHS IN THE UPPER 60S.  
WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY
 
MOSTLY CLEAR WITH ISOLATED SHOWERS AND THUNDERSTORMS.  
LOWS AROUND 40. HIGHS IN THE MID 60S.    
SUNDAY
 
MOSTLY SUNNY. ISOLATED SHOWERS IN THE MORNING, THEN  
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS IN THE AFTERNOON.  
HIGHS IN THE MID 60S.  
 

 
 
WYZ416-161200-  
WEST WIND RIVER MOUNTAINS/EAST ZONE BRIDGER TETON NF-  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. NUMEROUS SHOWERS AND ISOLATED  
THUNDERSTORMS IN THE MORNING. SCATTERED SHOWERS  
AND THUNDERSTORMS IN THE AFTERNOON. CHANCE OF  
PRECIPITATION 70 PERCENT.  
CHANCE OF THUNDER...40 PERCENT.  
MAX TEMPERATURE.....52-57.  
24 HR TREND......6 DEGREES COOLER.  
MIN HUMIDITY........45-51 PERCENT.  
24 HR TREND......11 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHWEST WINDS 10 TO 15 MPH UNTIL 1500, THEN  
WEST. GUSTS UP TO 30 MPH.  
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.  
CHC OF WETTING RAIN.22 PERCENT.  
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH.  
MIXING HEIGHT.......1000-3000 FT AGL UNTIL 1200, THEN 3800-5800 FT  
AGL.  
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN GOOD.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
CHANCE OF THUNDER...0 PERCENT.  
MIN TEMPERATURE.....31-36.  
24 HR TREND......5 DEGREES COOLER.  
MAX HUMIDITY........74-80 PERCENT.  
24 HR TREND......10 PERCENT DRIER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......WEST WINDS AROUND 10 MPH WITH GUSTS TO AROUND  
25 MPH UNTIL 2100, THEN DOWNSLOPE/DOWNVALLEY  
4-7 MPH.  
RIDGE TOP WINDS.....NORTHWEST AROUND 15 MPH UNTIL 2400, THEN  
NORTHEAST.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH UNTIL 2400, THEN  
NORTHEAST.  
MIXING HEIGHT.......1800-3800 FT AGL UNTIL 2400, THEN 400-800 FT  
AGL.  
SMOKE DISPERSAL.....POOR.  
   
TUESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS AND SNOW  
SHOWERS IN THE MORNING, THEN SCATTERED SHOWERS  
AND ISOLATED THUNDERSTORMS IN THE AFTERNOON.  
CHANCE OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....56-61.  
24 HR TREND......3 DEGREES WARMER.  
MIN HUMIDITY........36-42 PERCENT.  
24 HR TREND......9 PERCENT DRIER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 1200, THEN SOUTH  
AROUND 10 MPH UNTIL 1500, THEN UPSLOPE/UPVALLEY  
5-9 MPH. GUSTS UP TO 20 MPH.  
RIDGE TOP WINDS.....EAST AROUND 10 MPH UNTIL 1200, THEN SOUTHWEST.  
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 10 PERCENT.  
TRANSPORT WINDS.....EAST AROUND 10 MPH UNTIL 1200, THEN NORTHWEST.  
MIXING HEIGHT.......1400-3400 FT AGL UNTIL 1200, THEN 5200-7200 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
PARTLY CLOUDY. ISOLATED SHOWERS AND  
THUNDERSTORMS IN THE EVENING. LOWS IN THE LOWER 30S. NORTHEAST  
WINDS AROUND 10 MPH.    
WEDNESDAY
 
MOSTLY CLEAR WITH ISOLATED SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 30S. HIGHS IN THE MID 50S. WINDS  
GENERALLY LESS THAN 10 MPH.    
THURSDAY
 
CLEAR. LOWS IN THE MID 30S. HIGHS AROUND 60. WINDS  
GENERALLY LESS THAN 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER  
60S. WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY
 
PARTLY CLOUDY WITH ISOLATED SHOWERS AND  
THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 60S.    
SUNDAY
 
MOSTLY SUNNY. ISOLATED SHOWERS IN THE MORNING, THEN  
ISOLATED SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE  
LOWER 60S.  
 

 
 
WYZ288-161200-  
EAST WIND RIVER MOUNTAINS/SOUTH SHOSHONE NF-  
INCLUDING THE CITIES OF DUBOIS AND SOUTH PASS  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. NUMEROUS SHOWERS AND ISOLATED  
THUNDERSTORMS IN THE MORNING. SCATTERED SHOWERS  
AND THUNDERSTORMS IN THE AFTERNOON. CHANCE OF  
PRECIPITATION 70 PERCENT.  
CHANCE OF THUNDER...40 PERCENT.  
MAX TEMPERATURE.....57-62.  
24 HR TREND......4 DEGREES COOLER.  
MIN HUMIDITY........40-46 PERCENT.  
24 HR TREND......7 PERCENT WETTER.  
20-FOOT WINDS.......WEST WINDS 15 TO 20 MPH WITH GUSTS TO AROUND 35  
MPH.  
RIDGE TOP WINDS.....WEST 20 TO 25 MPH.  
CHC OF WETTING RAIN.15 PERCENT.  
TRANSPORT WINDS.....WEST AROUND 20 MPH UNTIL 1200, THEN SOUTHWEST  
AROUND 30 MPH.  
MIXING HEIGHT.......1600-3600 FT AGL UNTIL 1200, THEN 5400-7400 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 1200, THEN VERY GOOD TO  
EXCELLENT.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS AND  
THUNDERSTORMS EARLY IN THE EVENING. ISOLATED  
SHOWERS EARLY IN THE MORNING. CHANCE OF  
PRECIPITATION 20 PERCENT.  
CHANCE OF THUNDER...10 PERCENT.  
MIN TEMPERATURE.....33-38.  
24 HR TREND......6 DEGREES COOLER.  
MAX HUMIDITY........71-77 PERCENT.  
24 HR TREND......4 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......WEST WINDS 10 TO 15 MPH WITH GUSTS TO AROUND 30  
MPH UNTIL 2400, THEN DOWNSLOPE/DOWNVALLEY 4-7  
MPH.  
RIDGE TOP WINDS.....WEST 10 TO 15 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST 10 TO 15 MPH.  
MIXING HEIGHT.......2000-4000 FT AGL UNTIL 2400, THEN 400-800 FT  
AGL.  
SMOKE DISPERSAL.....FAIR TO GOOD UNTIL 2400, THEN POOR.  
   
TUESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SNOW SHOWERS IN THE  
MORNING. SCATTERED SHOWERS THROUGH THE DAY.  
ISOLATED THUNDERSTORMS IN THE AFTERNOON. CHANCE  
OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....53-58.  
24 HR TREND......3 DEGREES COOLER.  
MIN HUMIDITY........45-51 PERCENT.  
24 HR TREND......10 PERCENT WETTER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 0900, THEN  
NORTHEAST AROUND 10 MPH. GUSTS UP TO 20 MPH.  
RIDGE TOP WINDS.....NORTHEAST 10 TO 15 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 30 PERCENT.  
TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.  
MIXING HEIGHT.......1000-3000 FT AGL UNTIL 1200, THEN 3600-5600 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
PARTLY CLOUDY. ISOLATED SHOWERS AND  
THUNDERSTORMS IN THE EVENING, THEN ISOLATED SHOWERS AFTER  
MIDNIGHT. LOWS IN THE UPPER 30S. NORTH WINDS AROUND 10 MPH.    
WEDNESDAY
 
MOSTLY CLEAR WITH SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE MID 50S. NORTH  
WINDS AROUND 10 MPH.    
THURSDAY
 
CLEAR. LOWS AROUND 40. HIGHS IN THE LOWER 60S. WINDS  
GENERALLY LESS THAN 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE MID  
60S. WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY
 
PARTLY CLOUDY WITH ISOLATED SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE MID 60S.    
SUNDAY
 
MOSTLY SUNNY. ISOLATED SHOWERS IN THE MORNING, THEN  
ISOLATED SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. HIGHS IN THE  
MID 60S.  
 

 
 
WYZ414-161200-  
SALT AND WYOMING RANGES/WEST ZONE BRIDGER TETON NF-  
INCLUDING THE CITY OF AFTON  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. NUMEROUS SHOWERS IN THE MORNING.  
SCATTERED THUNDERSTORMS THROUGH THE DAY.  
SCATTERED SHOWERS IN THE AFTERNOON. CHANCE OF  
PRECIPITATION 70 PERCENT.  
CHANCE OF THUNDER...40 PERCENT.  
MAX TEMPERATURE.....53-58.  
24 HR TREND......6 DEGREES COOLER.  
MIN HUMIDITY........41-47 PERCENT.  
24 HR TREND......7 PERCENT WETTER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 0900, THEN WEST  
10 TO 15 MPH WITH GUSTS TO AROUND 35 MPH.  
RIDGE TOP WINDS.....SOUTHWEST AROUND 10 MPH UNTIL 1200, THEN WEST  
AROUND 20 MPH.  
CHC OF WETTING RAIN.15 PERCENT UNTIL 1200, THEN 5 PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH UNTIL 1200, THEN WEST  
AROUND 20 MPH.  
MIXING HEIGHT.......1000-3000 FT AGL UNTIL 1200, THEN 4400-6400 FT  
AGL.  
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN GOOD TO VERY GOOD.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
CHANCE OF THUNDER...0 PERCENT.  
MIN TEMPERATURE.....32-37.  
24 HR TREND......5 DEGREES COOLER.  
MAX HUMIDITY........75-81 PERCENT.  
24 HR TREND......12 PERCENT DRIER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTHWEST WINDS AROUND 10 MPH WITH GUSTS TO  
AROUND 30 MPH UNTIL 2100, THEN  
DOWNSLOPE/DOWNVALLEY 4-7 MPH.  
RIDGE TOP WINDS.....NORTHWEST AROUND 15 MPH UNTIL 2400, THEN  
NORTHEAST.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH UNTIL 2400, THEN  
NORTHEAST.  
MIXING HEIGHT.......2400-4400 FT AGL UNTIL 2400, THEN 400-1000 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 2400, THEN POOR.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY.  
ISOLATED SHOWERS IN THE AFTERNOON. ISOLATED  
THUNDERSTORMS LATE IN THE AFTERNOON. CHANCE OF  
PRECIPITATION 20 PERCENT.  
CHANCE OF THUNDER...10 PERCENT.  
MAX TEMPERATURE.....58-63.  
24 HR TREND......4 DEGREES WARMER.  
MIN HUMIDITY........31-37 PERCENT.  
24 HR TREND......9 PERCENT DRIER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.  
RIDGE TOP WINDS.....NORTHEAST AROUND 10 MPH UNTIL 1200, THEN  
NORTHWEST.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH UNTIL 1200, THEN  
NORTHWEST.  
MIXING HEIGHT.......1400-3400 FT AGL UNTIL 1200, THEN 5600-7600 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
MOSTLY CLEAR. LOWS IN THE UPPER 30S. WINDS  
GENERALLY LESS THAN 10 MPH.    
WEDNESDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE  
LOWER 60S. WINDS GENERALLY LESS THAN 10 MPH.    
THURSDAY
 
CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE MID 60S.  
WINDS GENERALLY LESS THAN 10 MPH.    
FRIDAY
 
PARTLY CLOUDY. LOWS IN THE LOWER 40S. HIGHS IN THE  
UPPER 60S. WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY
 
PARTLY CLOUDY WITH ISOLATED SHOWERS AND  
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 60S.    
SUNDAY
 
MOSTLY SUNNY. ISOLATED SHOWERS IN THE MORNING, THEN  
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS IN THE AFTERNOON.  
HIGHS IN THE MID 60S.  
 

 
 
WYZ278-161200-  
UPPER GREEN RIVER BASIN/ROCK SPRINGS BLM-  
INCLUDING THE CITIES OF BIG PINEY, FARSON, AND PINEDALE  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. SCATTERED SHOWERS IN THE  
MORNING. ISOLATED THUNDERSTORMS THROUGH THE  
DAY. ISOLATED SHOWERS IN THE AFTERNOON. CHANCE  
OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....59-64.  
24 HR TREND......3 DEGREES COOLER.  
MIN HUMIDITY........33-39 PERCENT.  
24 HR TREND......4 PERCENT WETTER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 0900, THEN  
SOUTHWEST 10 TO 15 MPH WITH GUSTS TO AROUND 30  
MPH.  
RIDGE TOP WINDS.....NORTHWEST AROUND 10 MPH UNTIL 1200, THEN WEST  
AROUND 20 MPH.  
CHC OF WETTING RAIN.7 PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH UNTIL 1200, THEN WEST  
AROUND 25 MPH.  
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 1200, THEN 6200-8200 FT  
AGL.  
SMOKE DISPERSAL.....POOR UNTIL 1200, THEN VERY GOOD TO EXCELLENT.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
CHANCE OF THUNDER...0 PERCENT.  
MIN TEMPERATURE.....32-37.  
24 HR TREND......7 DEGREES COOLER.  
MAX HUMIDITY........75-81 PERCENT.  
24 HR TREND......1 PERCENT DRIER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO  
AROUND 30 MPH UNTIL 2400, THEN  
DOWNSLOPE/DOWNVALLEY 4-7 MPH.  
RIDGE TOP WINDS.....NORTH 10 TO 15 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTH 10 TO 15 MPH.  
MIXING HEIGHT.......2800-4800 FT AGL UNTIL 2400, THEN 400-600 FT  
AGL.  
SMOKE DISPERSAL.....GOOD UNTIL 2400, THEN POOR.  
   
TUESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS IN THE LATE  
MORNING AND AFTERNOON. ISOLATED THUNDERSTORMS  
IN THE AFTERNOON. CHANCE OF PRECIPITATION 20  
PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....58-63.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........30-36 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. GUSTS UP TO 15 MPH.  
RIDGE TOP WINDS.....NORTHEAST AROUND 10 MPH UNTIL 1200, THEN  
SOUTHEAST.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTH AROUND 10 MPH UNTIL 1200, THEN NORTHWEST.  
MIXING HEIGHT.......1000-3000 FT AGL UNTIL 1200, THEN 5200-7200 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
PARTLY CLOUDY. ISOLATED SHOWERS IN THE EVENING.  
LOWS IN THE UPPER 30S. WINDS GENERALLY LESS THAN 10 MPH.    
WEDNESDAY
 
MOSTLY CLEAR. ISOLATED SHOWERS AND THUNDERSTORMS.  
LOWS IN THE UPPER 30S. HIGHS IN THE MID 60S. WINDS GENERALLY LESS  
THAN 10 MPH.    
THURSDAY
 
CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE UPPER 60S.  
WINDS GENERALLY LESS THAN 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS AROUND 40. HIGHS IN THE LOWER 70S.  
WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY THROUGH SUNDAY
 
MOSTLY CLEAR WITH ISOLATED SHOWERS AND  
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 70S.  
 

 
 
WYZ277-161200-  
LINCOLN AND UINTA COUNTIES/LOWER ELEVATIONS-  
INCLUDING THE CITIES OF EVANSTON, FORT BRIDGER, AND KEMMERER  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.  
SCATTERED SHOWERS IN THE MORNING. ISOLATED  
THUNDERSTORMS THROUGH THE DAY. ISOLATED SHOWERS  
IN THE AFTERNOON. CHANCE OF PRECIPITATION 50  
PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....61-66.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........28-34 PERCENT.  
24 HR TREND......2 PERCENT WETTER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 0900. WINDS WEST  
AROUND 20 MPH WITH GUSTS TO AROUND 30 MPH AFTER  
1500.  
RIDGE TOP WINDS.....SOUTHWEST AROUND 10 MPH UNTIL 1200, THEN WEST  
AROUND 20 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH UNTIL 1200, THEN WEST  
AROUND 30 MPH.  
MIXING HEIGHT.......1400-3400 FT AGL UNTIL 1200, THEN 6800-8800 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 1200, THEN EXCELLENT.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
CHANCE OF THUNDER...0 PERCENT.  
MIN TEMPERATURE.....37-42.  
24 HR TREND......5 DEGREES COOLER.  
MAX HUMIDITY........69-75 PERCENT.  
24 HR TREND......3 PERCENT DRIER.  
HUMIDITY RECOVERY...GOOD.  
20-FOOT WINDS.......NORTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO  
AROUND 30 MPH UNTIL 2400, THEN  
DOWNSLOPE/DOWNVALLEY 4-7 MPH.  
RIDGE TOP WINDS.....NORTHWEST AROUND 15 MPH UNTIL 2400, THEN  
NORTHEAST.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH UNTIL 2400, THEN  
NORTHEAST.  
MIXING HEIGHT.......2800-4800 FT AGL UNTIL 2400, THEN 400-600 FT  
AGL.  
SMOKE DISPERSAL.....GOOD UNTIL 2400, THEN POOR.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY. ISOLATED SHOWERS LATE IN THE  
MORNING. ISOLATED SHOWERS AND THUNDERSTORMS  
LATE IN THE AFTERNOON. CHANCE OF PRECIPITATION  
20 PERCENT.  
CHANCE OF THUNDER...10 PERCENT.  
MAX TEMPERATURE.....60-65.  
24 HR TREND......2 DEGREES COOLER.  
MIN HUMIDITY........23-29 PERCENT.  
24 HR TREND......3 PERCENT DRIER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 1500, THEN  
NORTHWEST AROUND 10 MPH. GUSTS UP TO 15 MPH.  
RIDGE TOP WINDS.....NORTH AROUND 10 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH UNTIL 1200, THEN  
NORTHWEST.  
MIXING HEIGHT.......1000-3000 FT AGL UNTIL 1200, THEN 5400-7400 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
MOSTLY CLEAR. LOWS IN THE UPPER 30S. WINDS  
GENERALLY LESS THAN 10 MPH.    
WEDNESDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE  
MID 60S. WINDS GENERALLY LESS THAN 10 MPH.    
THURSDAY
 
CLEAR. LOWS IN THE UPPER 30S. HIGHS AROUND 70. WINDS  
GENERALLY LESS THAN 10 MPH.    
FRIDAY
 
PARTLY CLOUDY. LOWS IN THE LOWER 40S. HIGHS IN THE  
LOWER 70S. WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY THROUGH SUNDAY
 
MOSTLY CLEAR WITH ISOLATED SHOWERS AND  
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 70S.  
 

 
 
WYZ279-161200-  
SWEETWATER COUNTY/ROCK SPRINGS BLM/FLAMING GORGE NRA-  
INCLUDING THE CITIES OF GREEN RIVER, ROCK SPRINGS, AND WAMSUTTER  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS. CHANCE OF PRECIPITATION 40  
PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....65-70.  
24 HR TREND......1 DEGREE WARMER.  
MIN HUMIDITY........28-34 PERCENT.  
24 HR TREND......3 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHWEST WINDS 10 TO 15 MPH. GUSTS UP TO 20  
MPH UNTIL 1200, THEN 30 MPH.  
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH UNTIL 1200, THEN WEST  
AROUND 25 MPH.  
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 1200, THEN 7200-9200 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 1200, THEN EXCELLENT.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS IN THE EVENING.  
ISOLATED THUNDERSTORMS THROUGH THE NIGHT.  
SCATTERED SHOWERS AFTER MIDNIGHT. CHANCE OF  
PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MIN TEMPERATURE.....40-45.  
24 HR TREND......3 DEGREES COOLER.  
MAX HUMIDITY........79-85 PERCENT.  
24 HR TREND......18 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......WEST WINDS AROUND 15 MPH WITH GUSTS TO AROUND  
25 MPH UNTIL 2100, THEN DOWNSLOPE/DOWNVALLEY  
4-7 MPH.  
RIDGE TOP WINDS.....WEST AROUND 15 MPH UNTIL 2400, THEN NORTH.  
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.  
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH UNTIL 2400, THEN NORTH.  
MIXING HEIGHT.......2400-4400 FT AGL UNTIL 2400, THEN 400-600 FT  
AGL.  
SMOKE DISPERSAL.....FAIR TO GOOD UNTIL 2400, THEN POOR.  
   
TUESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS EARLY IN THE  
MORNING. ISOLATED THUNDERSTORMS THROUGH THE  
DAY. SCATTERED SHOWERS. CHANCE OF PRECIPITATION  
50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....57-62.  
24 HR TREND......8 DEGREES COOLER.  
MIN HUMIDITY........44-50 PERCENT.  
24 HR TREND......17 PERCENT WETTER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 0900, THEN  
NORTHEAST AROUND 10 MPH. GUSTS UP TO 20 MPH.  
RIDGE TOP WINDS.....NORTHEAST 10 TO 15 MPH.  
CHC OF WETTING RAIN.5 PERCENT UNTIL 1200, THEN 20 PERCENT.  
TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH UNTIL 1200, THEN WEST.  
MIXING HEIGHT.......600-2600 FT AGL UNTIL 1200, THEN 3400-5400 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
PARTLY CLOUDY. ISOLATED SHOWERS AND  
THUNDERSTORMS IN THE EVENING, THEN ISOLATED SHOWERS AFTER  
MIDNIGHT. LOWS IN THE LOWER 40S. NORTHEAST WINDS AROUND 10 MPH.    
WEDNESDAY
 
MOSTLY CLEAR WITH ISOLATED SHOWERS AND  
THUNDERSTORMS. LOWS AROUND 40. HIGHS IN THE LOWER 60S. NORTHEAST  
WINDS AROUND 10 MPH.    
THURSDAY
 
CLEAR. LOWS AROUND 40. HIGHS IN THE UPPER 60S. WINDS  
GENERALLY LESS THAN 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE LOWER  
70S. WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY
 
MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE LOWER  
70S.    
SUNDAY
 
MOSTLY SUNNY. ISOLATED SHOWERS AND THUNDERSTORMS IN THE  
AFTERNOON. HIGHS IN THE LOWER 70S.  
 

 
 
WYZ289-161200-  
GRANITE/GREEN/FERRIS/RATTLESNAKE MOUNTAINS-  
INCLUDING THE CITY OF JEFFREY CITY  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS. CHANCE OF PRECIPITATION 50  
PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....65-70.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........23-29 PERCENT.  
24 HR TREND......3 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO  
AROUND 30 MPH UNTIL 1200, THEN AROUND 20 MPH  
WITH GUSTS TO AROUND 40 MPH.  
RIDGE TOP WINDS.....SOUTHWEST AROUND 15 MPH UNTIL 1200, THEN AROUND  
25 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....WEST AROUND 20 MPH UNTIL 1200, THEN SOUTHWEST  
AROUND 30 MPH.  
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 1200, THEN 7000-9000 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 1200, THEN EXCELLENT.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED THUNDERSTORMS EARLY IN  
THE EVENING. ISOLATED SHOWERS EARLY IN THE  
EVENING. ISOLATED SHOWERS EARLY IN THE MORNING.  
SOME THUNDERSTORMS MAY BE SEVERE EARLY IN THE  
EVENING. CHANCE OF PRECIPITATION 20 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MIN TEMPERATURE.....42-47.  
24 HR TREND......5 DEGREES COOLER.  
MAX HUMIDITY........79-85 PERCENT.  
24 HR TREND......24 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......NORTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO  
AROUND 35 MPH UNTIL 2400, THEN  
DOWNSLOPE/DOWNVALLEY 4-7 MPH.  
RIDGE TOP WINDS.....NORTHWEST 10 TO 15 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....NORTH 10 TO 15 MPH.  
MIXING HEIGHT.......2000-4000 FT AGL UNTIL 2400, THEN 400-600 FT  
AGL.  
SMOKE DISPERSAL.....FAIR TO GOOD UNTIL 2400, THEN POOR.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.  
ISOLATED SHOWERS EARLY IN THE MORNING.  
SCATTERED SHOWERS IN THE LATE MORNING AND  
AFTERNOON. ISOLATED THUNDERSTORMS IN THE  
AFTERNOON. CHANCE OF PRECIPITATION 50 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....59-64.  
24 HR TREND......5 DEGREES COOLER.  
MIN HUMIDITY........39-45 PERCENT.  
24 HR TREND......15 PERCENT WETTER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH UNTIL 0900, THEN  
NORTHEAST AROUND 10 MPH WITH GUSTS TO AROUND 25  
MPH.  
RIDGE TOP WINDS.....NORTHEAST AROUND 15 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 25 PERCENT.  
TRANSPORT WINDS.....NORTHEAST AROUND 15 MPH.  
MIXING HEIGHT.......600-2600 FT AGL UNTIL 1200, THEN 4000-6000 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS IN THE EVENING, THEN SCATTERED SHOWERS AFTER  
MIDNIGHT. LOWS IN THE MID 40S. NORTH WINDS AROUND 10 MPH.    
WEDNESDAY
 
PARTLY CLOUDY WITH SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS AROUND 60. NORTH  
WINDS AROUND 10 MPH.    
THURSDAY
 
MOSTLY CLEAR. ISOLATED SHOWERS AND THUNDERSTORMS.  
LOWS IN THE LOWER 40S. HIGHS IN THE MID 60S. WINDS GENERALLY LESS  
THAN 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE LOWER  
70S. WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE  
LOWER 70S.    
SUNDAY
 
MOSTLY SUNNY. ISOLATED SHOWERS AND THUNDERSTORMS IN THE  
AFTERNOON. HIGHS IN THE LOWER 70S.  
 

 
 
WYZ300-161200-  
CASPER MOUNTAIN-  
354 AM MDT MON SEP 15 2025  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY.  
ISOLATED SHOWERS AND THUNDERSTORMS LATE IN THE  
AFTERNOON. SOME THUNDERSTORMS MAY BE SEVERE  
LATE IN THE AFTERNOON. CHANCE OF PRECIPITATION  
20 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....66-71.  
24 HR TREND......2 DEGREES WARMER.  
MIN HUMIDITY........28-34 PERCENT.  
24 HR TREND......3 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHWEST WINDS AROUND 15 MPH WITH GUSTS TO  
AROUND 30 MPH.  
RIDGE TOP WINDS.....SOUTHWEST AROUND 20 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT.  
TRANSPORT WINDS.....SOUTHWEST AROUND 20 MPH UNTIL 1200, THEN AROUND  
30 MPH.  
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 1200, THEN 6800-8800 FT  
AGL.  
SMOKE DISPERSAL.....POOR TO FAIR UNTIL 1200, THEN EXCELLENT.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. ISOLATED THUNDERSTORMS IN THE  
EVENING. ISOLATED SHOWERS IN THE EVENING.  
ISOLATED SHOWERS EARLY IN THE MORNING. SOME  
THUNDERSTORMS MAY BE SEVERE EARLY IN THE  
EVENING. CHANCE OF PRECIPITATION 20 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MIN TEMPERATURE.....43-48.  
24 HR TREND......4 DEGREES COOLER.  
MAX HUMIDITY........81-87 PERCENT.  
24 HR TREND......27 PERCENT WETTER.  
HUMIDITY RECOVERY...EXCELLENT.  
20-FOOT WINDS.......WEST WINDS AROUND 15 MPH WITH GUSTS TO AROUND  
30 MPH UNTIL 2100, THEN DOWNSLOPE/DOWNVALLEY  
4-7 MPH.  
RIDGE TOP WINDS.....WEST AROUND 15 MPH UNTIL 2400, THEN SOUTHEAST.  
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.  
TRANSPORT WINDS.....WEST AROUND 15 MPH UNTIL 2400, THEN SOUTHEAST.  
MIXING HEIGHT.......1200-3200 FT AGL UNTIL 2400, THEN 200-400 FT  
AGL.  
SMOKE DISPERSAL.....POOR.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. SCATTERED SHOWERS IN THE  
MORNING, THEN NUMEROUS SHOWERS AND ISOLATED  
THUNDERSTORMS IN THE AFTERNOON. CHANCE OF  
PRECIPITATION 60 PERCENT.  
CHANCE OF THUNDER...20 PERCENT.  
MAX TEMPERATURE.....59-64.  
24 HR TREND......6 DEGREES COOLER.  
MIN HUMIDITY........53-59 PERCENT.  
24 HR TREND......20 PERCENT WETTER.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.  
RIDGE TOP WINDS.....NORTHEAST AROUND 10 MPH.  
CHC OF WETTING RAIN.ZERO PERCENT UNTIL 1200, THEN 50 PERCENT.  
TRANSPORT WINDS.....WEST AROUND 10 MPH.  
MIXING HEIGHT.......200-2200 FT AGL UNTIL 1200, THEN 3000-5000 FT  
AGL.  
SMOKE DISPERSAL.....POOR.  
 
   
FORECAST DAYS 3 THROUGH 7...
 
   
TUESDAY NIGHT
 
MOSTLY CLOUDY. SCATTERED SHOWERS AND  
THUNDERSTORMS IN THE EVENING, THEN SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE MID 40S. WINDS  
GENERALLY LESS THAN 10 MPH.    
WEDNESDAY
 
MOSTLY CLOUDY WITH NUMEROUS SHOWERS AND ISOLATED  
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE MID 50S. WINDS  
GENERALLY LESS THAN 10 MPH.    
THURSDAY
 
MOSTLY CLEAR. ISOLATED SHOWERS AND THUNDERSTORMS.  
LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 60S. WINDS GENERALLY  
LESS THAN 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE MID  
60S. WINDS GENERALLY LESS THAN 10 MPH.    
SATURDAY THROUGH SUNDAY
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S.  
HIGHS AROUND 70.  
 

 
 
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