FNUS76 KPDT 232213 FWSPDT Spot Forecast for Colwash...SE WA Type 3 IMT - Team 2 National Weather Service Pendleton OR 313 PM PDT Sun Aug 23 2026 Forecast is based on forecast start time of 0600 PDT on August 24. ***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... Light northwest winds in the the morning will turn northeast in the afternoon remaining under 10 mph through the day. No rain or thunderstorms are expected. Afternoon minimum humidity around 25 percent will recover to around 60 percent Monday Night. .MONDAY... Sky/weather.........Sunny (15-25 percent). Areas of smoke, then smoke late in the afternoon. CWR.................0 percent. Chance of lightning.0 percent. Max temperature.....Around 90. Min humidity........22-27 percent. Wind (20 ft)........Northwest winds 5 to 7 mph shifting to the northeast 5 to 8 mph late in the afternoon. Ridgetop wind.......Northwest winds 5 to 7 mph shifting to the northeast 5 to 8 mph late in the afternoon. Mixing height.......4900 ft AGL early in the morning. Transport winds.....Northwest 7 to 8 mph shifting to the northeast late in the morning. Ventilation Index...Low (40-60) increasing to moderate (260-300) in the afternoon. TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Chc of ltng (%).0 0 0 0 0 0 0 0 0 0 0 0 Temp............58 60 63 66 71 75 78 81 84 86 86 87 RH..............71 68 63 57 50 43 40 36 33 30 29 27 20 FT wind dir..NW NW NW NW NW N NE NE NE NE NE NE 20 FT wind spd..6 5 6 6 6 5 6 7 7 7 7 6 20 FT wind gust.7 6 7 7 7 7 10 10 10 10 10 .MONDAY NIGHT... Sky/weather.........Mostly clear (20-30 percent). Smoke early in the evening, then areas of smoke early in the evening. CWR.................0 percent. Chance of lightning.0 percent. Min temperature.....59-63. Max humidity........46-53 percent. Wind (20 ft)........Northeast winds 5 to 7 mph early in the evening becoming light, then becoming light in the evening. Ridgetop wind.......Northeast winds 6 to 10 mph early in the evening becoming light, then becoming light in the evening. Mixing height.......3300 ft AGL early in the evening then 500 ft AGL late in the evening. Transport winds.....North 7 to 8 mph shifting to the northwest 8 to 9 mph late in the evening. Ventilation Index...Low (110-120) decreasing to low (30-40) overnight. .TUESDAY... Sky/weather.........Mostly sunny (20-30 percent). Areas of smoke early in the morning. CWR.................0 percent. Chance of lightning.0 percent. Max temperature.....91-94. Min humidity........19-24 percent. Wind (20 ft)........Northwest winds 5 to 7 mph early in the morning becoming light. Ridgetop wind.......Northwest winds 6 to 10 mph early in the morning becoming light. Mixing height.......500 ft AGL early in the morning then 6000 ft AGL late in the morning. Transport winds.....Northwest around 8 mphshifting to the north around 7 mph late in the morning, then shifting to the southeast around 5 mph late in the afternoon shifting to the southwest around 6 mph late in the afternoon. Ventilation Index...Low (30) increasing to low (110-140) in the afternoon. $$ Forecaster...Russell Requested by...Ryan Scharnhorst Type of request...WILDFIRE .TAG 2620326.0/PDT .DELDT 08/23/26 .FormatterVersion 2.0.0 .EMAIL david_winter@pullman-wa.gov,ryan.scharnhorst@pullman-wa.gov