896 
FNUS76 KOTX 111842
FWSOTX

Spot Forecast for Ulm Creek...USFS
National Weather Service Spokane WA
1142 AM PDT Thu Sep 11 2025

Forecast is based on forecast start time of 0600 PDT on September 12. 
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

An unstable airmass will remain in place Friday bring a 25 
percent chance for thunderstorms. If hit by a thunderstorm, gusty 
outflow winds could reach up to 40 mph. RH recoveries tonight will
be good. Winds will be light Friday and Saturday. Shower chances 
ramp up to 50 percent again Sunday but a more stable atmosphere 
is reducing thunder chances below 15 percent Sunday. 

.FRIDAY...

Sky/weather.........Mostly sunny. 50 percent chance of showers, 25 
                    percent chance of thunderstorms in the afternoon.
CWR.................25 percent. 
Chance of lightning.25 percent. 
Max temperature.....69-72. 
Min humidity........55-60 percent. 
Wind (20 ft)........West 3 to 6 mph. Gusty and erratic winds expected 
                    near thunderstorms.
Mixing height.......6000 ft AGL.  
Transport winds.....West 5 to 6 mph. 

.FRIDAY NIGHT...

Sky/weather.........Mostly cloudy then becoming mostly clear. 40 percent 
                    chance of rain showers and slight chance of thunderstorms 
                    before 2200. 
CWR.................25 percent. 
Chance of lightning.20 percent. 
Min temperature.....Around 54. 
Max humidity........78 percent. 
Wind (20 ft)........Downslope/downvalley winds 1 to 4 mph. Gusty and erratic winds 
                    expected near thunderstorms in the evening. 
Mixing height.......4000 ft AGL falling to 0 ft AGL. 
Transport winds.....South around 5 mph. 

.SATURDAY...

Sky/weather.........Sunny. 10 percent chance of rain showers in the 
                    afternoon. 
CWR.................5 percent. 
Chance of lightning.5 percent. 
Max temperature.....70-73. 
Min humidity........42-47 percent. 
Wind (20 ft)........Light and variable winds 2 to 4 mph. 
Mixing height.......7000 ft AGL. 
Transport winds.....Light winds becoming northwest around 5 mph in 
                    the afternoon. 

$$
Forecaster...DB
Requested by...OPSC(T)
Type of request...WILDFIRE
.TAG 2521355.8/OTX
.DELDT 09/11/25
.FormatterVersion 2.0.0
.EMAIL matthew_derosier@firenet.gov,maggie.penamora@usda.gov,victoria.payne@usda.gov,megan.primmer@usda.gov