641
FNUS76 KPDT 222328
FWSPDT

Spot Forecast for SPRING CREEK FIRE...WALLA WALLA COUNTY FIRE DISTRICT 4
National Weather Service Pendleton OR
428 PM PDT Wed Jul 22 2026

Forecast is based on forecast start time of 1700 PDT on July 22.
***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.

...HEAT ADVISORY IN EFFECT UNTIL 9 PM PDT THURSDAY...

.DISCUSSION...Elevated fire weather conditions continue through
the forecast period with humidities dropping in the teens, with
slight improvement into the 20 to 30 percent range tomorrow.
Smoke issues persist with local and nearby wildfire transport.
Otherwise, overnight recoveries will be moderate hovering in the
40 to 50 percent range.

.REST OF TODAY...

Sky/weather.........Sunny (15-25 percent). Patchy smoke.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....99-104.
Min humidity........13-18 percent.
Wind (20 ft)........Northwest winds 3 to 8 mph.
Ridgetop wind.......Northwest winds 5 to 10 mph.
Mixing height.......4500 ft AGL.
Transport winds.....North 5 to 10 mph.
Ventilation Index...Low (100).

TIME (PDT)      5PM 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............101 101 98  90  78  80  77  74  75  74  72  72
RH..............17  16  20  25  35  33  36  38  38  39  42  43
20 FT wind dir..NW  N   N   NE  E   E   E   SE  SE  SE  SE  S
20 FT wind spd..7   7   7   6   6   7   7   7   7   7   7   8
20 FT wind gust.8

.TONIGHT...

Sky/weather.........Partly cloudy (30-40 percent). Patchy smoke.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....68-73.
Max humidity........45-50 percent.
Wind (20 ft)........North winds 5 to 10 mph shifting to the south
                    at 5 to 10 mph by 4 AM.
Ridgetop wind.......North winds 7 to 12 mph shifting to the south
                    at 7 to 12 mph by 4 AM.
Mixing height.......500 ft AGL.
Transport winds.....North 5 to 10 mph shifting to the east early
                    in the evening, then shifting to the south 7 to
                    12 mph late in the evening.
Ventilation Index...Low (100) decreasing to low (30) overnight.

.THURSDAY...

Sky/weather.........Sunny (15-25 percent). Patchy smoke.
CWR.................0 percent.
Chance of lightning.15 percent.
Max temperature.....97-102.
Min humidity........24-29 percent.
Wind (20 ft)........South winds 5 to 10 mph shifting to the
                    southwest 7 to 12 mph by 9 AM.
Ridgetop wind.......South winds 7 to 12 mph shifting to the
                    southwest 10 to 15 mph by 9 AM.
Mixing height.......4500 ft AGL.
Transport winds.....Southwest 7 to 12 mph decreasing to around 9
                    mph late in the afternoon.
Ventilation Index...Low (110) increasing to moderate (310) in the
                    afternoon.

$$
Forecaster...Day
Requested by...BRANDON MCKINNEY
Type of request...WILDFIRE
.TAG 2617669.8/PDT
.DELDT 07/22/26
.FormatterVersion 2.0.0
.EMAIL jgolden@wwfire4.com,spotweather@wwfire4.com