FNUS76 KPDT 221806
FWSPDT

Spot Forecast for CASEY RD FIRE...WALLA WALLA COUNTY FIRE DISTRICT 4
National Weather Service Pendleton OR
1106 AM PDT Sat Aug 22 2026

Forecast is based on forecast start time of 1100 PDT on August 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.

...RED FLAG WARNING IN EFFECT UNTIL 10 PM PDT THIS EVENING...

.DISCUSSION...Isolated showers continue to move through the fire
area this morning, though minimal impact anticipated at the fire
site. The approaching showers could briefly produce gust winds to
around 20 kts, though confidence in this development is not high.
Drier conditions anticipated behind the exit of these showers,
with rain probabilities decreasing to 5% or less. Winds around 10
kt will remain through the late afternoon hours, with winds less
than 10 kts after 1700. 

.REST OF TODAY...

Sky/weather.........Partly cloudy (25-40 percent). Isolated showers 
                    (10-15% chance) through 1300. Patchy blowing 
                    dust. 
CWR.................0 percent. 
Chance of lightning.7 percent. 
Max temperature.....93-96. 
Min humidity........19-24 percent. 
Wind (20 ft)........Southwest winds 6 to 12 mph. Gusts to 20 kt 
                    through the afternoon.
Mixing height.......4000 ft AGL. 
Transport winds.....Southwest 13 to 17 mph. 
Ventilation Index...Moderate (420). 

TIME (PDT)      11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P 
Chc of ltng (%).0   0   0   10  10  10  0   0   0   0   0   0   
Temp............84  85  88  89  90  91  90  91  88  84  76  73  
RH..............39  36  32  30  27  26  25  24  24  28  33  37  
20 FT wind dir..SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  
20 FT wind spd..12  12  11  11  11  12  12  12  12  13  14  15  
20 FT wind gust.14  14  14  14  16  16  17  17  17  17  18  18  

.TONIGHT...

Sky/weather.........Mostly clear (15-25 percent). Patchy blowing 
                    dust in the evening. 
CWR.................0 percent. 
Chance of lightning.4 percent. 
Min temperature.....59-62. 
Max humidity........59-64 percent. 
Wind (20 ft)........Southwest winds 7 to 22 mph. Gusts of 25 to 
                    30 kt after 2300 this evening.
Mixing height.......500 ft AGL. 
Transport winds.....Southwest 15 to 23 mph. 
Ventilation Index...Moderate (300) decreasing to low (100) 
                    overnight. 

$$
Forecaster...Branham
Requested by...BRANDON MCKINNEY 
Type of request...WILDFIRE 
.TAG 2620242.0/PDT 
.DELDT 08/22/26 
.FormatterVersion 2.0.0 
.EMAIL spotweather@wwfire4.com