411
FNUS76 KOTX 172141
FWSOTX

Spot Forecast for Hangful...TRIBE/ USFS
National Weather Service Spokane WA
241 PM PDT Thu Sep 17 2026

Forecast is based on ignition time of 1400 PDT on September 17.
.DISCUSSION...

Conditions will be dry with mild temperatures today and Friday
outside of a small chance (10% chance) of thunderstorms from
1700-0100 hours this afternoon and into tonight. RH recovery
tonight will be good. Friday trends a few degrees cooler with
slightly higher relative humidity.

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

.REST OF TODAY...

Sky/weather.........Partly sunny. 10% chance of thunderstorms
                    from 1700-2100 hours.
CWR.................10 percent.
Chance of lightning.10 percent.
Max temperature.....76-78.
Min humidity........32-37 percent.
Wind (20 ft)........Northeast winds 3 to 6 mph. Gusty and
                    erratic winds expected near thunderstorm
                    outflows.
Mixing height.......3100 ft AGL.
Transport winds.....North around 7 mph.
Ventilation Index...Moderate (214).

.TONIGHT...

Sky/weather.........Mostly cloudy then becoming partly cloudy. 10%
                    chance of thunderstorms from 2100-0100 hours.
CWR.................10 percent.
Chance of lightning.10 percent.
Min temperature.....52.
Max humidity........75-80 percent.
Wind (20 ft)........Southwest winds 4 to 8 with gusts up to 15 mph
                    in the evening becoming southeast around 0000 hours.
Mixing height.......Falling to near surface around 1900 hours.
Transport winds.....Southwest 7 to 8 mph.
Ventilation Index...Low (84).

.FRIDAY...

Sky/weather.........Sunny.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....72-74.
Min humidity........35-40 percent.
Wind (20 ft)........Southwest winds around 2 to 4 mph becoming
                    northwest around 1200 hours.
Mixing height.......4800 ft AGL. Inversion breaking around 1000 hours.
Transport winds.....Southwest around 6 mph shifting to the
                    northwest in the afternoon.
Ventilation Index...Moderate (259).


$$
Forecaster...DB
Requested by...Madisen Hawkins
Type of request...PRESCRIBED
.TAG 2622085.0/OTX
.DELDT 09/17/26
.FormatterVersion 2.0.0
.EMAIL madisen.hawkins@usda.gov,idcdc@firenet.gov,jhoward@cdatribe-nsn.gov