704  
FNUS75 KBYZ 011217  
FWSBYZ  
 
SPOT FORECAST FOR EAST SIDE FIRE...CARBON COUNTY MT  
NATIONAL WEATHER SERVICE BILLINGS MT  
617 AM MDT FRI MAY 1 2026  
 
FORECAST IS BASED ON FORECAST START TIME OF 0700 MDT ON MAY 01.  
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 SUNNY, WARMER AND DRIER WITH AFTERNOON RHS DROPPING  
INTO THE 20S. EXPECT TERRAIN DRIVEN WINDS WITH AFTERNOON GUSTS  
NEAR 15 MPH. HUMIDITY RECOVERY TONIGHT WILL BE POOR AND SATURDAY  
WILL AGAIN BE WARM & DRY (WITH DEEPER MIXING), BUT A FEW LIGHT  
SHOWERS ARE POSSIBLE BY EVENING AS A WEAK COLD FRONT ARRIVES FROM  
THE NORTH. THERE IS A GREATER CHANCE OF SHOWERS ON SUNDAY.  
   
TODAY
 
 
SKY/WEATHER.........SUNNY.  
CWR.................0 PERCENT.  
CHANCE OF LIGHTNING.0 PERCENT.  
MAX TEMPERATURE.....52-56.  
MIN HUMIDITY........24-28 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......DOWNSLOPE/DOWNVALLEY 3-7 MPH EARLY, BECOMING  
NORTHWEST TO NORTH 5-10 MPH BY 11AM.  
AFTERNOON GUSTS TO 15 MPH.  
RIDGETOP...........NORTHWEST AROUND 10 MPH.  
MIXING HEIGHT.......INCREASING TO 5000 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....NORTHWEST 10 MPH.  
   
TONIGHT
 
 
SKY/WEATHER.........CLEAR.  
CWR.................0 PERCENT.  
CHANCE OF LIGHTNING.0 PERCENT.  
MIN TEMPERATURE.....37-41.  
MAX HUMIDITY........38-42 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHWEST 4-8 MPH.  
RIDGETOP...........WEST 5-10 MPH.  
MIXING HEIGHT.......DECREASING TO 300 FT AGL OVERNIGHT.  
TRANSPORT WINDS.....SOUTHWEST TO WEST 7 MPH.  
   
SATURDAY
 
 
SKY/WEATHER.........SUNNY IN THE MORNING, THEN BECOMING PARTLY  
CLOUDY. A LIGHT SHOWER POSSIBLE BY EVENING.  
CWR.................LESS THAN 5 PERCENT.  
CHANCE OF LIGHTNING.5 PERCENT.  
MAX TEMPERATURE.....54-58.  
MIN HUMIDITY........26-30 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHWEST 5-9 MPH IN THE MORNING BECOMING  
NORTH BY NOON. AFTERNOON GUSTS TO 15 MPH.  
RIDGETOP...........WEST AROUND 10 MPH.  
MIXING HEIGHT.......INCREASING TO 7000 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....NORTHWEST 10 MPH.  
 

 
FORECASTER...LESTER  
REQUESTED BY...BILLINGS DISPATCH  
TYPE OF REQUEST...WILDFIRE  
.TAG 2611877.3/BYZ  
.DELDT 05/01/26  
.FORMATTERVERSION 2.0.0  
.EMAIL DOUGLAS.ZIMMER@USDA.GOV,MTBDC@FIRENET.GOV,CALLEN@CARBONMT.GOV  
 
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