423
FNUS76 KOTX 261953
FWSOTX

Spot Forecast for Porcupine...USFS
National Weather Service Spokane WA
1253 PM PDT Sun Jul 26 2026

Forecast is based on forecast start time of 1300 PDT on July 26.
.DISCUSSION...

Dry conditions with light winds at the fire today and tomorrow.
Exposed ridgetops will have west-southwest winds 20-25 mph both
Sunday and Monday afternoon. RH recovery overnight into Monday
will be poor. No rain expected the next 7 days. Monitoring
Saturday (Aug 1) afternoon for a strong cold front passage.

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.........Sunny.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....71.
Min humidity........33-38 percent.
Wind (20 ft)........Southwest winds 2 to 5 mph. Southwest winds
                    up to 20-25 on exposed ridgetops.
Mixing height.......4500 ft AGL.
Transport winds.....Southwest around 14 mph.
Ventilation Index...High (583).

.TONIGHT...

Sky/weather.........Mostly clear. Patchy smoke overnight.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....55
Max humidity........47-52 percent.
Wind (20 ft)........Downslope/downvalley winds 1-3 mph.
Mixing height.......Near surface.
Transport winds.....Southwest 7 to 8 mph.
Ventilation Index...Moderate (461) decreasing to low (28)
                    overnight.

.MONDAY...

Sky/weather.........Sunny. Patchy smoke.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....72
Min humidity........31-36 percent.
Wind (20 ft)........Southwest winds 2 to 5 mph. Southwest winds
                    around 20-25 mph on exposed ridgetops.
Mixing height.......4500 ft AGL.
Transport winds.....Southwest 9 to 14 mph.
Ventilation Index...Moderate (352) increasing to high (713) in the
                    afternoon.

$$
Forecaster...DB
Requested by...Crystal Taylor
Type of request...WILDFIRE
.TAG 2618210.3/OTX
.DELDT 07/26/26
.FormatterVersion 2.0.0
.EMAIL idcdc@firenet.gov