157
FNUS76 KOTX 301151
FWSOTX

Spot Forecast for Pino Blanco Unit 9...USFS
National Weather Service Spokane WA
451 AM PDT Wed Sep 30 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. Southwest
winds will shift to the west and gradually decrease Wednesday
evening. Afternoon high temperatures will increase to the lower
60s while relative humidities drops to near 50 percent.
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).
***************************************************************

.Today...

Sky/weather.........Mostly cloudy then becoming mostly sunny.
CWR.................0 percent.
Chance of lightning.5 percent.
Max temperature.....Around 60
Min humidity........50 percent.
Wind (20 ft)........Southwest winds 5 to 9 mph becoming west 5 to 9
                    mph with gusts to 14 mph in the afternoon.
Mixing height.......2500 ft AGL increasing to 4500 ft AGL in the
                    afternoon.
Transport winds.....West around 11 mph.
Ventilation Index...Moderate (438).

.TONIGHT...

Sky/weather.........Partly cloudy.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....Around 43.
Max humidity........85 percent.
Wind (20 ft)........West wind 3 to 6 mph becoming variable less
                    than 5 mph after 2200.
Mixing height.......1500 ft AGL.
Transport winds.....Light winds becoming southeast around 5 mph
                    overnight.
Ventilation Index...Low (78).

.THURSDAY...

Sky/weather.........Mostly cloudy then becoming mostly sunny.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....Around 62.
Min humidity........49 percent.
Wind (20 ft)........Variable wind less than 3 mph becoming northeast
                    3 to 6 mph after 1200.
Mixing height.......3500 ft AGL increasing to 5000 ft AGL in the
                    afternoon.
Transport winds.....South around 5 mph shifting to the southwest in
                    the afternoon.
Ventilation Index...Moderate (264).

$$
Forecaster...AB
Requested by...Seth Chaffee
Type of request...PRESCRIBED
.TAG 2622656.2/OTX
.DELDT 09/30/26
.FormatterVersion 2.0.0
.EMAIL chad.borg@usda.gov,seth.chaffee@usda.gov,justin.gilbert@usda.gov,cody.cline@usda.gov,alan.carlson@usda.gov,devyn.garcia@usda.gov