771
FNUS75 KMSO 172025
FWSMSO
SPOT FORECAST FOR SPRUCE & SPRUCE RIDGE FIRES
NATIONAL WEATHER SERVICE MISSOULA MT
225 PM MDT WED SEP 17 2025
FORECAST IS BASED ON FORECAST START TIME OF 0600 MDT ON SEPTEMBER 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WARMER THAN NORMAL AND DRY THROUGH THE NEXT COUPLE
OF DAYS. OVERNIGHT THERMAL BELTS WITH TOP OF VALLEY INVERSION NEAR
5000 FT MSL LEADING TO WEAK RECOVERY OF TEMPS AND RH. WINDS
GENERALLY OUT OF THE SOUTHWEST IN THE AFTERNOONS GUSTING UP TO 15
MPH. OVERNIGHT WINDS LIKELY TERRAIN DRIVEN MIDSLOPE, OUT OF THE
WEST-SOUTHWEST AT RIDGE/PEAK TOPS.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* CWR (> 0.10 INCH)...0 PERCENT.
* CHANCE LIGHTNING....0 PERCENT.
* MAX TEMPERATURE.....72-77.
* MIN HUMIDITY........31-36 PERCENT.
* WIND (20 FT)........VARIABLE/WEST 1-4 MPH BECOMING WEST-SOUTHWEST
3-6 MPH WITH GUSTS UP TO 15 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......LESS THAN 100 FT AGL IN THE MORNING
INCREASING TO 5000 FT AGL IN THE AFTERNOON.
* MIXING WINDS........SOUTHWEST 5 MPH.
* PRECIP AMOUNT.......0.00 INCHES.
THURSDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* CWR (> 0.10 INCH)...0 PERCENT.
* CHANCE LIGHTNING....0 PERCENT.
* MIN TEMPERATURE.....50-55.
* MAX HUMIDITY........48-53 PERCENT.
* WIND (20 FT)........VARIABLE 1-4 MPH.
* MIXING HEIGHT.......DECREASING TO LESS THAN 100 FT AGL IN THE
EVENING.
* MIXING WINDS........SOUTHWEST 5 MPH.
* PRECIP AMOUNT.......0.00 INCHES.
FRIDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* CWR (> 0.10 INCH)...0 PERCENT.
* CHANCE LIGHTNING....0 PERCENT.
* MAX TEMPERATURE.....72-77.
* MIN HUMIDITY........31-36 PERCENT.
* WIND (20 FT)........VARIABLE 1-4 MPH IN THE MORNING BECOMING
WEST-SOUTHWEST 3-6 MPH WITH GUSTS UP TO 15 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......INCREASING TO 6000 FT AGL IN THE AFTERNOON.
* MIXING WINDS........SOUTHWEST 10 MPH.
* PRECIP AMOUNT.......0.00 INCHES.
209: TEMPERATURES INTO THE 70S WEDNESDAY AFTERNOON WITH CLEAR TO
MOSTLY CLEAR SKIES. WINDS VARIABLE AND OUT OF THE WEST AT LESS
THAN 10 MPH. MINIMUM RHS IN THE 30% RANGE TO NEAR 40%.
FORECASTER...PARKER/KITSMILLER
REQUESTED BY...ERIN RYAN, PSC3
TYPE OF REQUEST...WILDFIRE
.TAG 2521411.12/MSO
.DELDT 09/17/25
.FORMATTERVERSION 2.0.0
.EMAIL 2025.GREENRATTLECOMPLEX.PLANS@FIRENET.GOV
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