FNUS76 KPDT 230726
FWSPDT

Spot Forecast for Colwash...SE WA Type 3 IMT - Team 2
National Weather Service Pendleton OR
1226 AM PDT Sun Aug 23 2026

Forecast is based on forecast start time of 0100 PDT on August 23. 
***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...West winds will prevail tonight with slightly
stronger winds along the higher terrain south of Hwy 22. Winds
will shift to the northwest but remain light through the afternoon,
with increasing winds late in the evening through 2AM, with a shift
to the west in the lower elevations, and northwest winds persisting
along the higher terrain. Afternoon RHs will be in the lower 30s,
with good overnight recovery.

.REST OF TONIGHT...

Sky/weather.........Mostly clear (0-10 percent). 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Min temperature.....53-57. 
Max humidity........71-91 percent. 
Wind (20 ft)........West winds 5 to 10 mph. 
Ridgetop wind.......West winds 6 to 12 mph. 
Mixing height.......400 ft AGL. 
Transport winds.....West 7 to 10 mph. 
Ventilation Index...Low (30-40). 

TIME (PDT)      1AM 2AM 3AM 4AM 5AM 6AM 7AM 8AM 9AM 10A 11A 12P 
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0   
Temp............64  62  60  58  57  55  57  61  64  69  72  75  
RH..............65  69  73  78  82  86  87  76  65  58  53  47  
20 FT wind dir..W   W   W   W   W   W   W   NW  NW  NW  NW  NW   
20 FT wind spd..10  10  9   8   6   6   6   7   7   6   6   5   
20 FT wind gust.14  14  14  14  12     

.TODAY...

Sky/weather.........Sunny (0-10 percent). 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Max temperature.....83-86. 
Min humidity........31-36 percent. 
Wind (20 ft)........West winds 5 to 8 mph shifting to the northwest
					4 to 7 mph around 8AM.
Ridgetop wind.......West winds 5 to 11 mph shifting to the northwest
					around 8AM. 
Mixing height.......6000 ft AGL early in the morning. 
Transport winds.....West 6 to 7 mph. 
Ventilation Index...Low (80-100) increasing to moderate (280-300) 
                    in the afternoon. 

.TONIGHT...

Sky/weather.........Mostly clear (5-15 percent). Patchy smoke early 
                    in the evening. Areas of smoke late in the 
                    evening, then patchy smoke overnight. 
CWR.................0 percent. 
Chance of lightning.0 percent. 
Min temperature.....52-55. 
Max humidity........72-92 percent. 
Wind (20 ft)........Northwest winds 4 to 7 mph shifting to the west
					5 to 10 mph around 10PM, then decreasing to 
					4 to 7 mph around 2AM.
Ridgetop wind.......Northwest winds 5 to 10 mph increasing to
					8 to 14 mph around 10PM, then decreasing to
					5 to 10 mph around 2AM.  
Mixing height.......4300 ft AGL early in the evening. 
Transport winds.....Northwest 6 to 7 mph. 
Ventilation Index...Low (100-110) decreasing to low (30) overnight. 

$$
Forecaster...Lawhorn
Requested by...Ryan Scharnhorst
Type of request...WILDFIRE
.TAG 2620289.0/PDT
.DELDT 08/23/26
.FormatterVersion 2.0.0
.EMAIL ryan.scharnhorst@pullman-wa.gov,david_winter@firenet.gov