471  
FNUS75 KBYZ 182047  
FWSBYZ  
 
SPOT FORECAST FOR DAVIS COULEE...BIA-CROW  
NATIONAL WEATHER SERVICE BILLINGS MT  
247 PM MDT FRI SEP 18 2026  
 
FORECAST IS BASED ON FORECAST START TIME OF 1700 MDT ON SEPTEMBER 18.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
DISCUSSION  
 
   
..FLOOD WATCH THIS EVENING THROUGH SUNDAY AFTERNOON  
 
SLOW MOVING SHOWERS WITH EMBEDDED THUNDERSTORMS MOVE IN THIS  
EVENING. THERE MAY BE BRIEF BREAKS IN PRECIPITATION, BUT OVERALL,  
SHOWERS AND OCCASIONAL THUNDERSTORMS WILL CONTINUE INTO SUNDAY  
AFTERNOON. WIDESPREAD RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE  
EXPECTED, WITH LOCALLY HIGHER AMOUNTS OF 4+ INCHES UNDER PARTICULARLY  
SLOW MOVING AND PERSISTENT THUNDERSTORMS. ANY STRONGER STORMS WILL  
BE CAPABLE OF PRODUCING ERRATIC WIND GUSTS UP TO 50 MPH. WINDS  
INCREASE SATURDAY, WITH GUSTS UP TO 25 MPH OUT OF THE NORTH TO  
NORTHWEST BY THE AFTERNOON. MONDAY INTO NEXT WEEK TRENDS WARMER AND  
DRIER.  
   
TONIGHT  
 
SKY/WEATHER.........CLOUDY. RAIN SHOWERS AND CHANCE OF THUNDERSTORMS  
THROUGH THE NIGHT. PATCHY FOG OVERNIGHT. SOME  
THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL.  
CWR.................90 PERCENT.  
CHANCE OF LIGHTNING.37 PERCENT.  
MIN TEMPERATURE.....53-57.  
MAX HUMIDITY........95-100 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......NORTH WINDS 5 TO 10 MPH BECOMING LIGHT OVERNIGHT.  
GUSTY AND ERRATIC WINDS NEAR THUNDERSTORMS.  
RIDGETOP...........NORTH AROUND 10 MPH.  
MIXING HEIGHT.......DECREASING TO 500 FT AGL OVERNIGHT.  
TRANSPORT WINDS.....NORTH AROUND 10 MPH.  
   
SATURDAY  
 
SKY/WEATHER.........MOSTLY CLOUDY. RAIN SHOWERS AND CHANCE OF  
THUNDERSTORMS. SOME THUNDERSTORMS MAY PRODUCE  
HEAVY RAINFALL.  
CWR.................89 PERCENT.  
CHANCE OF LIGHTNING.41 PERCENT.  
MAX TEMPERATURE.....62-66.  
MIN HUMIDITY........95-100 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......NORTH WINDS 5 TO 8 MPH INCREASING TO 10 TO 15 WITH  
GUSTS UP TO 25 MPH IN THE AFTERNOON. GUSTY AND  
ERRATIC WINDS NEAR THUNDERSTORMS.  
RIDGETOP...........NORTH AROUND 10 MPH INCREASING TO 15 TO 25 MPH.  
MIXING HEIGHT.......INCREASING TO 2300 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....NORTH 10 TO 20 MPH.  
   
SATURDAY NIGHT  
 
SKY/WEATHER.........CLOUDY. RAIN SHOWERS AND CHANCE OF  
THUNDERSTORMS IN THE EVENING, THEN RAIN SHOWERS  
LIKELY OVERNIGHT. SOME THUNDERSTORMS MAY  
PRODUCE HEAVY RAINFALL.  
CWR.................88 PERCENT.  
CHANCE OF LIGHTNING.30 PERCENT.  
MIN TEMPERATURE.....49-53.  
MAX HUMIDITY........95-100 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......NORTHWEST WINDS 5 TO 15 MPH WITH GUSTS UP TO 25  
MPH. GUSTY AND ERRATIC WINDS NEAR THUNDERSTORMS.  
RIDGETOP...........NORTHWEST 15 TO 25 MPH.  
MIXING HEIGHT.......DECREASING TO 600 FT AGL OVERNIGHT.  
TRANSPORT WINDS.....NORTHWEST 15 TO 25 MPH.  
   
SUNDAY  
 
SKY/WEATHER.........CLOUDY. RAIN SHOWERS IN THE MORNING, THEN RAIN  
SHOWERS LIKELY AND SLIGHT CHANCE OF  
THUNDERSTORMS IN THE AFTERNOON. SOME  
THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL.  
CWR.................70 PERCENT.  
CHANCE OF LIGHTNING.19 PERCENT.  
MAX TEMPERATURE.....61-65.  
MIN HUMIDITY........87-91 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......WEST WINDS 5 TO 13 MPH. GUSTY AND ERRATIC WINDS  
EXPECTED NEAR THUNDERSTORMS.  
RIDGETOP...........WEST 10 TO 15 MPH.  
MIXING HEIGHT.......INCREASING TO 2500 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....WEST 10 TO 15 MPH.  
   
FORECAST DAYS 3 THROUGH 7  
   
MONDAY  
 
MOSTLY CLOUDY. CHANCE OF SHOWERS. LOWS IN THE UPPER 40S. HIGHS IN  
THE LOWER 70S. LIGHT WINDS.    
TUESDAY  
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE UPPER 70S.  
LIGHT WINDS.    
WEDNESDAY  
 
PARTLY CLOUDY. LOWS AROUND 50. HIGHS AROUND 80. LIGHT WINDS.    
THURSDAY  
 
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE LOWER 80S.    
FRIDAY  
 
PARTLY CLOUDY. LOWS AROUND 50. HIGHS IN THE LOWER 80S.  
 
 
FORECASTER...ARCHER  
REQUESTED BY...TRASIA  
TYPE OF REQUEST...WILDFIRE  
.TAG 2621871.7/BYZ  
.DELDT 09/18/26  
.FORMATTERVERSION 2.0.0  
.EMAIL RHAYNER@BLM.GOV,MTBDC@FIRENET.GOV,DSCIACCA@MT.GOV,ANNA_SAMMER@FIRENET.GOV,JLUDIKHUIZE@SHERIDANCOUNTYWY.GOV,GARRETCOSTA71@GMAIL.COM  
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