796
FNUS76 KPDT 110616
FWSPDT

Spot Forecast for SKYROCKET FIRE...WALLA WALLA COUNTY FIRE DISTRICT 4
National Weather Service Pendleton OR
1116 PM PDT Thu Sep 10 2026

Forecast is based on forecast start time of 2300 PDT on September 10.
***Thunderstorms imply gusty and erratic winds      ***
***Winds are 20 foot 10-minute averages             ***
***CWR: Chance of wetting rain 0.10 or greater      ***
***Ventilation Index is derived from transport wind
   multiplied by the mixing height in 100`s of ft.
   Categories are a generalized indicator only:
   low (< 200), moderate (200-500), high (500-700),
   and very high (> 700).                           ***

If you have questions or concerns with this forecast, please
contact our office at (541) 276-8134.

.DISCUSSION...Elevated west southwest winds ongoing will
continue before starting to trend down by 4 am tonight, except
areas of sheltering can anticipate winds lower than forecast as
much as 3-5 mph. Good RH recovery tonight/overnight with cooler
conditions tomorrow. Dry conditions in place tomorrow and tomorrow
night. Light wind regime takes hold tomorrow afternoon into
tomorrow night.

.TONIGHT...

Sky/weather.........Mostly cloudy (80-90 percent) then becoming
                    partly cloudy (20-30 percent).
CWR.................0 percent.
Chance of lightning.5 percent.
Min temperature.....51-54.
Max humidity........75 percent.
Wind (20 ft)........West southwest winds 7 to 10 mph gusting to
                    16 mph becoming southwest 5 to 8 mph by 4 am.
Ridgetop Wind.......Southwest winds 5 to 10 mph.
Mixing height.......500 ft AGL.
Transport winds.....Southwest 10 to 14 mph.
Ventilation Index...Low (50).

TIME (PDT)      11P MID 1AM 2AM 3AM 4AM 5AM 6AM 7AM 8AM 9AM 10A
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............65  62  59  57  55  54  53  51  51  53  55  58
RH..............41  46  54  64  68  70  72  75  71  64  57  52
20 FT wind dir..SW  SW  SW  SW  SW  SW  SW  S   S   S   S   SW
20 FT wind spd..9   9   9   8   8   7   6   5   7   8   10  10
20 FT wind gust.16  14  14  14

.FRIDAY...

Sky/weather.........Mostly sunny (35-45 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....70-73.
Min humidity........22-27 percent.
Wind (20 ft)........Southwest winds 5 to 10 mph becoming 4 to 6
                    mph by late afternoon.
Ridgetop wind.......Southwest 6 to 12 mph.
Mixing height.......4700 ft AGL.
Transport winds.....Southwest 8 to 16 mph.
Ventilation Index...Moderate (320).

.FRIDAY NIGHT...

Sky/weather.........Partly cloudy (30-40 percent) then becoming
                    mostly cloudy (70-80 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....50-53.
Max humidity........53-58 percent.
Wind (20 ft)........Light southwest winds 3 to 5 mph becoming
                    light drainage winds overnight 1 to 4 mph.
Ridgetop wind.......South around 5 mph becoming light and variable.
Mixing height.......500 ft AGL.
Transport winds.....Light southwest winds around 5 mph shifting to
                    the south early in the morning.
Ventilation Index...Low (50).

$$
Forecaster...Townsend
Requested by...BRANDON MCKINNEY
Type of request...WILDFIRE
.TAG 2621634.0/PDT
.DELDT 09/10/26
.FormatterVersion 2.0.0
.EMAIL spotforecast@wwfire4.com