FNUS76 KPDT 160039 FWSPDT Spot Forecast for Muddy Run RX...OR- WSA National Weather Service Pendleton OR 539 PM PDT Thu Oct 15 2026 Forecast is based on ignition time of 1800 PDT on October 15. ***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...Winds will be diurnally driven with light winds developing in the overnight periods, then mostly northwest winds in the afternoons and evenings. Afternoon RHs will be in the upper teens tomorrow and upper 40s Friday. Overnight recoveries will be good. Low level inversion will lift after 11AM tomorrow, but mid level inversion will limit mixing during the afternoon. Low level inversion will redevelop after 4PM tomorrow, then lift around 10AM on Saturday. .TONIGHT... Sky/weather.........Mostly clear (15-25 percent). CWR.................0 percent. Chance of lightning.0 percent. Min temperature.....41-44. Max humidity........61-66 percent. Wind (20 ft)........Northwest winds 4 to 7 mph becoming light drainage winds around 12AM. Mixing height.......1000 ft AGL early in the evening then 500 ft AGL overnight. Transport winds.....North 7 to 8 mph in the evening becoming light, then becoming south 7 to 9 mph overnight. Ventilation Index...Low (40) decreasing to low (30) overnight. TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Chc of ltng (%).0 0 0 0 0 0 0 0 0 0 0 0 Temp............63 59 54 52 50 48 47 45 45 44 44 43 RH..............42 50 55 59 60 64 65 67 66 65 64 64 20 FT wind dir..N NW NW NW NW NW NW NW W W SW SW 20 FT wind spd..6 6 6 5 5 5 4 4 3 4 3 3 20 FT wind gust. .FRIDAY... Sky/weather.........Sunny (15-25 percent) then becoming partly sunny (50-60 percent). CWR.................0 percent. Chance of lightning.0 percent. Max temperature.....75-78. Min humidity........17-22 percent. Wind (20 ft)........Light winds becoming south 5 to 11 mph around 10AM. Mixing height.......3000 ft AGL early in the morning. Transport winds.....South 9 to 13 mph becoming light. Ventilation Index...Low (50) increasing to moderate (240) in the afternoon. .FRIDAY NIGHT... Sky/weather.........Mostly cloudy (55-65 percent). CWR.................0 percent. Chance of lightning.0 percent. Min temperature.....43-46. Max humidity........70-75 percent. Wind (20 ft)........Light winds becoming west 4 to 7 mph around 8PM, then becoming light winds around 5AM. Mixing height.......700 ft AGL early in the evening then 500 ft AGL late in the evening, then then 500 ft AGL early in the morning. Transport winds.....Light winds becoming west 5 to 8 mph early in the evening. Ventilation Index...Low (30). .SATURDAY... Sky/weather.........Mostly cloudy (65-75 percent) then becoming mostly sunny (35-45 percent). CWR.................0 percent. Chance of lightning.0 percent. Max temperature.....63-66. Min humidity........49-54 percent. Wind (20 ft)........Light winds becoming northwest 5 to 8 mph shifting to the north 5 to 11 mph around 1PM. Mixing height.......500 ft AGL early inthe morning then 3200 ft AGL late in the morning. Transport winds.....West 8 to 15 mph. Ventilation Index...Low (30) increasing to moderate (360) in the afternoon. $$ Forecaster...Lawhorn Requested by...Lilian Libokmeto Type of request...PRESCRIBED .TAG 2623745.3/PDT .DELDT 10/15/26 .FormatterVersion 2.0.0 .EMAIL joshua.sohappy@ctwsbnr.org