011  
FNUS75 KBYZ 061147  
FWSBYZ  
 
SPOT FORECAST FOR EAST SIDE FIRE...CARBON COUNTY MT  
NATIONAL WEATHER SERVICE BILLINGS MT  
547 AM MDT WED MAY 6 2026  
 
FORECAST IS BASED ON FORECAST START TIME OF 0700 MDT ON MAY 06.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS OR CONCERNS WITH  
THIS FORECAST.  
   
DISCUSSION
 
 
TODAY WILL BE DRY AND WARMER WITH TERRAIN-DRIVEN WINDS. AFTERNOON  
RHS ARE EXPECTED TO FALL TO THE 20S. LOOK FOR DOWNVALLEY WINDS TO  
INCREASE TONIGHT AHEAD OF THE NEXT WEATHER SYSTEM, WITH GUSTS OF  
25-30 MPH LATE TONIGHT INTO THURSDAY MORNING. THIS SYSTEM WILL  
BRING A JUMP IN HUMIDITIES AND SCATTERED SHOWERS TOMORROW. AN  
AFTERNOON WEAK THUNDERSTORM IS ALSO POSSIBLE. SNOW LEVELS ON  
THURSDAY WILL CLIMB TO NEAR 9000 FEET, BUT THE SHOWER ACTIVITY MAY  
OBSCURE THE MOUNTAIN TOPS AT TIMES.  
   
TODAY
 
 
SKY/WEATHER.........SUNNY.  
CWR.................0 PERCENT.  
CHANCE OF LIGHTNING.0 PERCENT.  
MAX TEMPERATURE.....48-52.  
MIN HUMIDITY........22-26 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......DOWNSLOPE/DOWNVALLEY 3-7 MPH EARLY, BECOMING  
NORTH 6-12 MPH BY 11AM. AFTERNOON GUSTS TO  
18 MPH.  
RIDGETOP...........WEST TO NORTHWEST 15-20 MPH GUSTING TO 25 MPH.  
MIXING HEIGHT.......INCREASING TO 4500 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....NORTHWEST 13 MPH.  
   
TONIGHT
 
 
SKY/WEATHER.........INCREASING CLOUDS. ISOLATED SHOWERS OVERNIGHT.  
SNOW LEVEL 8500 FEET.  
CWR.................LESS THAN 5 PERCENT.  
CHANCE OF LIGHTNING.5 PERCENT.  
MIN TEMPERATURE.....38-42.  
MAX HUMIDITY........54-58 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......NORTH 8-14 MPH UNTIL SUNSET, THEN SOUTHWEST  
TO WEST 10-20 MPH. GUSTS TO 25 MPH OVERNIGHT.  
RIDGETOP...........WEST TO NORTHWEST 20-30 MPH.  
MIXING HEIGHT.......DECREASING TO 700 FT AGL OVERNIGHT.  
TRANSPORT WINDS.....WEST 15 MPH.  
   
THURSDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. SCATTERED RAIN SHOWERS. ISOLATED  
THUNDERSTORMS IN THE AFTERNOON. ERRATIC WIND  
GUSTS POSSIBLE NEAR STORMS. SNOW LEVEL 9000  
FEET.  
CWR.................20 PERCENT.  
CHANCE OF LIGHTNING.20 PERCENT.  
MAX TEMPERATURE.....52-56.  
MIN HUMIDITY........36-40 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......WEST TO NORTHWEST 10-20 MPH GUSTING TO 25 MPH  
IN THE MORNING, BECOMING NORTH 10-18 MPH IN  
THE AFTERNOON.  
RIDGETOP...........NORTHWEST 15-25 MPH.  
MIXING HEIGHT.......INCREASING TO 7500 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....NORTHWEST 20 MPH.  
 

 
FORECASTER...LESTER  
REQUESTED BY...BILLINGS DISPATCH  
TYPE OF REQUEST...WILDFIRE  
.TAG 2611877.8/BYZ  
.DELDT 05/06/26  
.FORMATTERVERSION 2.0.0  
.EMAIL DOUGLAS.ZIMMER@USDA.GOV,CALLEN@CARBONMT.GOV,MTBDC@FIRENET.GOV  
 
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