560 
FNUS75 KMSO 130246
FWSMSO

Spot Forecast for Isabella Fire
National Weather Service Missoula MT
846 PM MDT Fri Sep 12 2025

Forecast is based on forecast start time of 0700 MDT on September 13. 
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...High pressure will begin to build into the area
aloft Saturday, causing shower and thunderstorm activity to become
less widespread with lesser chances for wetting rains and 
precipitation compared to the last few days. West-southwest winds
will develop in the afternoon and will generally be light, with
occasional gusts near 10 mph. Winds will trend higher on Sunday 
as a Pacific system approaches from the west. Southwest gusts of 
15-20 mph will develop during the afternoon. Rain showers arrive 
Sunday evening and end by later Monday, with a 70% chance for a 
precipitation, a 55% chance for wetting rains and a 35% chance for
0.25 inches of precipitation.

.SATURDAY...

* Sky/Weather.........Partly cloudy. Slight chance of showers and 
  thunderstorms in the afternoon. 
* CWR (> 0.10 Inch)...10 percent. 
* Chance Lightning....20 percent. 
* Max Temperature.....71-76. 
* Min Humidity........50-55 percent. 
* Wind (20 ft)........Variable 2-4 mph becoming west-southwest 
  4-6 mph in the afternoon. Gusts near 10 mph after 1400. 
* Mixing Height.......3500 ft agl increasing to 6500 ft agl in the 
  afternoon. 
* Mixing Winds........West 5 mph. 
* Precip Amount.......0.06 inches. 

.SATURDAY NIGHT...

* Sky/Weather.........Mostly clear. 
* CWR (> 0.10 Inch)...0 percent. 
* Chance Lightning....Up to 10 percent. 
* Min Temperature.....51-56. 
* Max Humidity........66-71 percent. 
* Wind (20 ft)........Southwest 3-5 mph shifting northeast 2-5
  overnight. 
* Mixing Height.......2000 ft agl decreasing to 1000 ft agl early 
  in the evening. 
* Mixing Winds........West 5 mph. 
* Precip Amount.......0.00 inches. 

.SUNDAY...

* Sky/Weather.........Mostly sunny then becoming mostly cloudy. 
  Chance of rain showers in the afternoon. 
* CWR (> 0.10 Inch)...10 percent. 
* Chance Lightning....Up to 10 percent. 
* Max Temperature.....68-73. 
* Min Humidity........48-53 percent. 
* Wind (20 ft)........South 2-5 mph shifting to the southwest
  around 8-12 mph with gusts of 15-20 in the afternoon. 
* Mixing Height.......2000 ft agl increasing to 7500 ft agl. 
* Mixing Winds........West 10 mph. 
* Precip Amount.......0.03 inches. 

$$
Forecaster...Lukinbeal
Requested by...Dusty Pierson
Type of request...WILDFIRE
.TAG 2521901.0/MSO
.DELDT 09/12/25
.FormatterVersion 2.0.0
.EMAIL dustin.pierson@usda.gov