871
FNUS75 KMSO 170751
FWSMSO
SPOT FORECAST FOR ISABELLA FIRE
NATIONAL WEATHER SERVICE MISSOULA MT
151 AM MDT WED SEP 17 2025
FORECAST IS BASED ON FORECAST START TIME OF 0700 MDT ON SEPTEMBER 17.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WARM AND DRY CONDITIONS THE NEXT SEVERAL DAYS.
THERMAL BELTS WILL LEAD TO ONLY MODEST RH RECOVERIES ON THE SLOPES
AT NIGHT. WINDS EASTERLY TODAY THEN DIURNALLY DRIVEN ON THURSDAY
BUT LIGHT OVERALL.
TODAY
* SKY/WEATHER.........SUNNY.
* CWR (> 0.10 INCH)...0 PERCENT.
* CHANCE LIGHTNING....0 PERCENT.
* MAX TEMPERATURE.....73-78.
* MIN HUMIDITY........36-41 PERCENT.
* WIND (20 FT)........EAST 5-6 MPH WITH GUSTS TO 12 MPH.
* MIXING HEIGHT.......3500 FT AGL INCREASING TO 5500 FT AGL IN THE
AFTERNOON.
* MIXING WINDS........SOUTHEAST 5 MPH.
* PRECIP AMOUNT.......0.00 INCHES.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* CWR (> 0.10 INCH)...0 PERCENT.
* CHANCE LIGHTNING....0 PERCENT.
* MIN TEMPERATURE.....51-56.
* MAX HUMIDITY........52-57 PERCENT.
* WIND (20 FT)........VARIABLE 2-4 MPH BECOMING SOUTHEAST AROUND 5
MPH OVERNIGHT.
* MIXING HEIGHT.......5000 FT AGL DECREASING TO 1000 FT AGL BY
LATE EVENING.
* MIXING WINDS........SOUTHEAST 5 MPH.
* PRECIP AMOUNT.......0.00 INCHES.
THURSDAY
* SKY/WEATHER.........SUNNY.
* CWR (> 0.10 INCH)...0 PERCENT.
* CHANCE LIGHTNING....0 PERCENT.
* MAX TEMPERATURE.....75-80.
* MIN HUMIDITY........33-38 PERCENT.
* WIND (20 FT)........SOUTHEAST AROUND 5 MPH SHIFTING TO THE
SOUTHWEST IN THE AFTERNOON.
* MIXING HEIGHT.......2500 FT AGL INCREASING TO 6000 FT AGL IN THE
AFTERNOON.
* MIXING WINDS........SOUTHWEST 5 MPH.
* PRECIP AMOUNT.......0.00 INCHES.
FORECASTER...BOOTH
REQUESTED BY...DUSTY PIERSON
TYPE OF REQUEST...WILDFIRE
.TAG 2521984.2/MSO
.DELDT 09/17/25
.FORMATTERVERSION 2.0.0
.EMAIL DUSTIN.PIERSON@USDA.GOV,GRANT.GALLI@USDA.GOV,NATHAN.STEPHENS@USDA.GOV
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