FNUS76 KPDT 272331 FWSPDT Spot Forecast for YATAMA...Yakama Agency National Weather Service Pendleton OR 431 PM PDT Mon Oct 27 2025 Forecast is based on ignition time of 0900 PDT on October 28. ***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 the transport wind multiplied by the mixing height in 100's of feet. Index categories are a generalized indicator only.*** If you have questions or concerns with this forecast, please contact our office at (541) 276-8134. .DISCUSSION...Generally dry weather is expected, through Wednesday, though there is a chance of rain Tuesday evening, overall amounts will be light. Winds will shift for southwest to northwest between Tuesday night and Wednesday. MIN RH values will generally be 50 to 55 percent Tuesday and around 50 percent Wednesday, with excellent overnight recoveries. .TUESDAY... Sky/weather.........Partly sunny (60-70 percent). CWR.................0 percent. Chance of lightning.0 percent. Max temperature.....Around 50. Min humidity........50-55 percent. Wind (20 ft)........Light winds. Ridgetop wind.......South to southeast wind 10 to 15 mph with gusts to 20 mph, turning more south in the afternoon. Mixing height.......1100 ft AGL. Transport winds.....East 5 to 7 mph becoming light. Ventilation Index...Poor (30) increasing to poor (60) in the afternoon. TIME (PDT) 9 AM 11 AM 1 PM 3 PM 5 PM 7 PM Chc of ltng (%).0 0 0 0 0 0 Temp............33 42 46 47 44 40 RH..............78 64 58 56 60 69 20 ft wind......N 4 NE 4 NE 4 E 4 NE 4 NE 4 20 ft wind gust.6 7 7 7 6 6 .TUESDAY NIGHT... Sky/weather.........Mostly cloudy (60-70 percent). Chance (30 percent) of rain late in the evening. CWR.................0 percent increasing to 13 percent late in the evening, then decreasing to 0 percent early in the morning. Chance of lightning.0 percent. Min temperature.....36-39. Max humidity........83-88 percent. Wind (20 ft)........Light winds becoming southwest 5 to 8 mph late in the evening. Ridgetop wind.......South to southwest wind 20 to 25 mph with gusts to 30 mph becoming southwest during the evening and west by morning. Mixing height.......500 ft AGL early in the evening then 500 ft AGL late in the evening. Transport winds.....Light winds becoming southwest 7 to 16 mph early in the evening, then shifting to the west around 14 mph early in the morning. Ventilation Index...Poor (30) increasing to poor (60) overnight. .WEDNESDAY... Sky/weather.........Mostly sunny (25-35 percent). CWR.................0 percent. Chance of lightning.0 percent. Max temperature.....53-56. Min humidity........48-53 percent. Wind (20 ft)........Southwest winds 5 to 10 mph shifting to the northwest 5 to 7 mph late in the afternoon, then becoming light late in the afternoon. Ridgetop wind.......West wind 15 to 25 mph early, becoming northwest in the afternoon and decreasing to 5 to 10 mph. Mixing height.......3800 ft AGL. Transport winds.....West 8 to 14 mph becoming light. Ventilation Index...Poor (50) increasing to poor (190) in the afternoon. $$ Forecaster...Nierenberg Requested by...Dan Sims Type of request...PRESCRIBED .TAG 2524592.0/PDT .DELDT 10/27/25 .FormatterVersion 2.0.0 .EMAIL Dan_sims@yakama.com