FNUS76 KPDT 041318 FWSPDT Spot Forecast for Conboy NW HQ...USFWS National Weather Service Pendleton OR 618 AM PDT Mon May 4 2026 Forecast is based on ignition time of 0700 PDT on May 04. ***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...Good (60-65%) overnight humidity recoveries this morning will lead to a cooler (-4) and less dry (+6%) day than Sunday. Sunny skies today, with breezy afternoon winds due to a weak gradient along the Cascades. Afternoon mixing heights will change little today and Tuesday, but better ventilation will occur today due to increased surface and transport winds. Dramatic wind shifts expected Tuesday, northeast in the morning, then southwest in the afternoon. .REST OF TODAY... Sky/weather.........Sunny (10-20 percent). CWR.................0 percent. Max temperature.....81-84. Min humidity........29-34 percent. Wind (20 ft)........Light winds becoming west 6 to 12 mph with gusts up to 17 mph after 1300, peaking between 1500 and 1800. Ridgetop wind.......Light winds becoming west 7 to 14 mph with gusts up to 20 mph after 1300, peaking between 1500 and 1800. Mixing height.......6400 ft AGL. Transport winds.....North around 6 mph shifting to the northeast late in the morning, then shifting to the west 9 to 12 mph late in the afternoon. Ventilation Index...Low (70) increasing to moderate (250) in the afternoon. TIME (PDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM Temp............53 56 60 67 72 77 79 79 80 81 79 77 RH..............61 61 58 49 41 37 34 35 34 35 36 40 20 FT wind dir..SW SW NE NE NE SW SW W W W NW N 20 FT wind spd..1 2 1 2 4 2 8 8 10 10 9 8 20 FT wind gust. 12 13 14 15 16 14 .TONIGHT... Sky/weather.........Mostly clear (10-20 percent). CWR.................0 percent. Min temperature.....50-53. Max humidity........75-80 percent. Wind (20 ft)........West winds 6 to 12 mph with gusts up to 17 mph becoming 3 to 7 mph after 2100. Ridgetop wind.......West winds 7 to 14 mph with gusts up to 20 mph becoming 4 to 8 mph after 2100. Mixing height.......900 ft AGL. Transport winds.....Northwest 6 to 12 mph. Ventilation Index...Low (170) decreasing (50) overnight. .TUESDAY... Sky/weather.........Sunny (5-15 percent). CWR.................0 percent. Max temperature.....79-82. Min humidity........32-37 percent. Wind (20 ft)........West winds 3 to 7 mph shifting to the northeast 5 to 10 mph with gusts up to 15 mph after 0800, then shifting to the southwest after 1300. Ridgetop wind.......West winds 4 to 8 mph shifting to the northeast 6 to 12 mph with gusts up to 17 mph after 0800, then shifting to the southwest after 1300. Mixing height.......6400 ft AGL. Transport winds.....North 6 to 7 mph shifting to the east around 6 mph late in the morning, then shifting to the west 7 to 8 mph late in the afternoon. Ventilation Index...Low (60) increasing (100) in theafternoon. $$ Forecaster...Callihan Requested by...Cory Thompson Type of request...PRESCRIBED .TAG 2612537.1/PDT .DELDT 05/04/26 .FormatterVersion 2.0.0 .EMAIL cory_thompson@fws.gov