453
FNUS76 KOTX 261046
FWSOTX

Spot Forecast for Willy...USFS
National Weather Service Spokane WA
346 AM PDT Sun Jul 26 2026

Forecast is based on forecast start time of 0700 PDT on July 26.
.DISCUSSION...

Southwesterly breezes will increase at the fire location today,
then quickly fall off this evening and become light overnight
tonight. Wind speeds along the ridgetops surrounding the fire
location may be 5 to 8 mph higher than those at the fire
location. Daytime relative humidities will be slightly higher
today and Monday compared to Saturday, though overnight humidity
recoveries are expected to trend poorer. West to southwesterly winds
will increase again on Monday, though wind speeds will likely be
slightly lower compared to today.

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).
***************************************************************

.TODAY...

Sky/weather.........Mostly sunny. Haze and areas of smoke.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....Around 75-78.
Min humidity........18-23 percent.
Wind (20 ft)........Light south-southwesterly winds 3 to 6 mph or less
                    steadily increasing to 10 to 15 mph through 1200 hours.
                    Winds will make a subtle westerly shift between 1200 and
                    1500 hours. Gusts to 25 mph in the afternoon.
Mixing height.......5000 ft AGL increasing to 8500 ft AGL in the afternoon.
Transport winds.....South 8 to 15 mph.
Ventilation Index...High (625) increasing to very high (1102) in
                    the afternoon.

.TONIGHT...

Sky/weather.........Partly cloudy then becoming mostly cloudy. Areas of smoke
                    and haze.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....Around 53-56.
Max humidity........57-62 percent.
Wind (20 ft)........West to northwest winds 4 to 7 mph through 2300 hours,
                    then becoming light and variable overnight.
Mixing height.......8000 ft AGL falling to 500 ft AGL.
Transport winds.....West 6 to 12 mph.
Ventilation Index...Very high (1025) decreasing to low (25)
                    overnight.

.MONDAY...

Sky/weather.........Mostly sunny. Areas of smoke and haze.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....Around 77-80.
Min humidity........23-28 percent.
Wind (20 ft)........Light winds becoming southwesterly 9 to 12 mph in the
                    afternoon.
Mixing height.......6000 ft AGL increasing to 10000 ft AGL in the
                    afternoon.
Transport winds.....Southwest 6 to 12 mph.
Ventilation Index...Moderate (494) increasing to very high (1085)
                    in the afternoon.

$$
Forecaster...PP
Requested by...Jason Headley
Type of request...WILDFIRE
.TAG 2618244.0/OTX
.DELDT 07/26/26
.FormatterVersion 2.0.0
.EMAIL jason.headley@usda.gov