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FNUS76 KOTX 300329
FWSOTX

Spot Forecast for GNA Annie Handpile...USFS
National Weather Service Spokane WA
829 PM PDT Tue Sep 29 2026

Forecast is based on ignition time of 0700 PDT on September 30.

.DISCUSSION...

Dry conditions and variable cloud cover are forecast for
Wednesday and Thursday with relatively light winds (less than 10
mph). Winds will be out of the north/northeast Wednesday,
Wednesday night, and Thursday morning before shifting out of the
southwest Thursday afternoon. Afternoon high temperatures will
rise into the mid 50s, and overnight lows will fall into the upper
30s. Inversions will lift around 0900 each morning.

If conditions become unrepresentative, contact the National Weather
Service.
***************************************************************
Forecasts for 20 foot wind speeds (valleys and ridge tops) are
10 minute averages reflecting RAWS wind.
***Ventilation Index is derived from transport wind
   multiplied by the mixing height divided by 100.
   Categories: low (< 200), moderate (200-500),
   high (500-800), and very high (> 800).
***************************************************************

.WEDNESDAY...

Sky/weather.........Partly cloudy in the morning becoming sunny
                    in the afternoon.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....Around 55.
Min humidity........32-37 percent.
Wind (20 ft)........Northeast winds 2-5 mph in the morning
                    becoming north with similar speeds after
                    1200 hours.
Mixing height.......Inversion lifting around 0900. Mixing height
                    increasing to 4500 ft AGL by 1500 hours.
Transport winds.....North 11-14 mph in the morning becoming
                    northwest with similar speeds after 1200
                    hours.
Ventilation Index...Moderate (284).

.WEDNESDAY NIGHT...

Sky/weather.........Partly cloudy in the evening becoming
                    mostly cloudy overnight.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....Around 37.
Max humidity........60-65 percent.
Wind (20 ft)........Northeast winds 1-4 mph.
Mixing height.......Falling to near surface around 1830 hours.
Transport winds.....East 3-6 mph.
Ventilation Index...Low (73).

.THURSDAY...

Sky/weather.........Partly cloudy.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....Around 56.
Min humidity........39-44 percent.
Wind (20 ft)........Northeast winds 3-6 mph in the morning
                    shifting southwest with similar speeds in
                    the afternoon.
Mixing height.......Increasing to 5000 ft AGL in the
                    afternoon.
Transport winds.....Northeast 5-8 mph shifting to the south
                    with similar speeds in the afternoon.
Ventilation Index...Moderate (220).

$$
Forecaster...RFKS
Requested by...Taylor Orteg
Type of request...PRESCRIBED
.TAG 2622683.2/OTX
.DELDT 09/29/26
.FormatterVersion 2.0.0
.EMAIL taylor.orteg@usda.gov