FNUS76 KPDT 230029 FWSPDT Spot Forecast for COLWASH...YAKAMA AGENCY National Weather Service Pendleton OR 529 PM PDT Sat Aug 22 2026 Forecast is based on forecast start time of 1800 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...Breezy windy conditions prevail through the early evening hours. Winds will light and variable as we head into the morning hours of Sunday and through the rest of the forecast period. Dry conditions linger with relative humidities dropping down to 20 to 30 percent. Overnight recoveries through the next two nights will be good to excellent hovering in the 80 to 90 percent range. .TONIGHT... Sky/weather.........Mostly clear (10-20 percent). Patchy blowing dust in the evening. CWR.................0 percent. Chance of lightning.1 percent. Min temperature.....52-57. Max humidity........80-85 percent. Wind (20 ft)........West winds 10 to 20 mph with gusts up to 25 mph. Winds decrease to 7 to 12 mph with gusts up to 20 mph by 9 PM. Winds shift to the southwest at 5 to 10 mph by 4 AM. Ridgetop wind.......West winds 15 to 25 mph with gusts up to 30 mph. Winds decrease to 10 to 15 mph with gusts up to 25 mph by 9 PM. Winds shift to the southwest at 10 to 15 mph by 4 AM. Mixing height.......500 ft AGL in the evening and overnight. Transport winds.....West 10 to 20 mph decreasing to 5 to 10 mph overnight. Ventilation Index...Moderate (310) decreasing to low (40) overnight. TIME (PDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM Chc of ltng (%).0 0 0 0 0 0 Temp............88 78 69 65 61 56 RH..............28 42 54 63 73 85 20 ft wind......W 17 W 11 W 10 W 8 W 8 SW 7 20 ft wind gust.22 16 14 14 14 11 .SUNDAY... Sky/weather.........Sunny (5-15 percent). CWR.................0 percent. Chance of lightning.0 percent. Max temperature.....87-92. Min humidity........27-32 percent. Wind (20 ft)........Southwest winds 5 to 10 mph, shifting to the northwest at 5 to 10 mph by 9 AM. Winds decrease to 3 to 8 mph from the north by noon. Ridgetop wind.......Southwest winds 7 to 12 mph, shifting to the northwest at 7 to 12 mph by 9 AM. Winds decrease to 5 to 10 mph from the north by noon. Mixing height.......6100 ft AGL early in the morning. Transport winds.....West 5 to 10 mph shifting to the north 5 to 10 mph late in the afternoon. Ventilation Index...Low (110-120) increasing to moderate (280) in the afternoon. .SUNDAY NIGHT... Sky/weather.........Mostly clear (0-10 percent). Areas of smoke. CWR.................0 percent. Chance of lightning.0 percent. Min temperature.....49-54. Max humidity........85-90 percent. Wind (20 ft)........Light winds with mostly driven terrain direction. Ridgetop wind.......Light winds. Mixing height.......500 ft AGL in the evening. Transport winds.....Northwest 3 to 8 mph shifting to the west5 to 10 mph overnight. Ventilation Index...Low (150) decreasing to low (30) overnight. .MONDAY... Sky/weather.........Sunny (0-10 percent). CWR.................0 percent. Chance of lightning.0 percent. Max temperature.....89-94. Min humidity........23-28 percent. Wind (20 ft)........Light and variable winds. Ridgetop wind.......Light and variable winds. Mixing height.......5200 ft AGL early in the morning. Transport winds.....Northwest 3 to 8 mph shifting to the northeast 5 to 10 mph late in the morning. Ventilation Index...Low (40) increasing to low (160) in the afternoon. $$ Forecaster...Day Requested by...SAMANTHA WATLAMET Type of request...WILDFIRE .TAG 2620268.0/PDT .DELDT 08/22/26 .FormatterVersion 2.0.0 .EMAIL samantha_watlamet@yakama.com