FNUS76 KPDT 181024 FWSPDT Spot Forecast for Ekone RX...Washington DNR National Weather Service Pendleton OR 324 AM PDT Mon May 18 2026 Forecast is based on ignition time of 0700 PDT on May 18. ***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... Dry and cool conditions this morning will warm enough to drive relative humidity into the mid 30s (percent) as winds increase to around 11 to 15 mph in the mid afternoon. Look for overnight recovery of RH to around 40 to 45%. .REST OF TODAY... Sky/weather.........Partly sunny (45-55 percent) then becoming mostly sunny (25-35 percent). CWR.................0 percent. Chance of lightning.0 percent. Max temperature.....63-66. Min humidity........33-38 percent. Wind (20 ft)........West winds 5 to 7 mph shifting to the southwest 5 to 13 mph in the late morning and afternoon. Ridgetop wind.......West winds 7 to 9 mph shifting to the southwest 7 to 15 mph in the late morning and afternoon. Mixing height.......7100 ft AGL. Transport winds.....Northwest 6 to 14 mph. Ventilation Index...Low (80) increasing to high (550) in the afternoon. TIME (PDT) 7 AM 9 AM 11 AM 1 PM 3 PM 5 PM Chc of ltng (%).0 0 0 0 0 0 Temp............43 49 57 61 63 62 RH..............65 58 48 41 37 39 20 ft wind......NW 6 SW 6 SW 8 SW 8 W 11 W 13 20 ft wind gust. 14 .TONIGHT... Sky/weather.........Mostly cloudy (50-60 percent) then becoming mostly clear (20-30 percent) then becoming mostly cloudy (50-60 percent). CWR.................0 percent. Chance of lightning.2 percent. Min temperature.....42-45. Max humidity........67-72 percent. Wind (20 ft)........Northwest winds 7 to 14 mph decreasing to 5 to 10 mph in the late evening and overnight. Ridgetop wind.......Northwest winds 9 to 16 mph decreasing to 5 to 10 mph in the late evening and overnight. Mixing height.......500 ft AGL in the evening then 500 ft AGL early in the morning. Transport winds.....Northwest 13 to 14 mph shifting to the west around 6 mph. Ventilation Index...Moderate (260) decreasing to low (30) overnight. .TUESDAY... Sky/weather.........Partly sunny (55-65 percent) then becoming mostly sunny (20-30 percent). CWR.................0 percent. Chance of lightning.0 percent. Max temperature.....66-69. Min humidity........37-42 percent. Wind (20 ft)........Northwest winds 5 to 7 mph shifting to the southwest 5 to 17 mph early in the morning. Ridgetop wind.......Northwest winds 7 to 9 mph shifting to the southwest 7 to 17 mph in the late morning. Mixing height.......5200 ft AGL. Transport winds.....West 6 to 13 mph increasing to around 16 mph late in the afternoon. Ventilation Index...Low (70) increasing to moderate (470) in the afternoon. .FORECAST DAYS 3 THROUGH 7... .WEDNESDAY... Partly cloudy. Lows in the mid 40s. Highs in the upper 60s. West winds around 5 mph. .THURSDAY... Partly cloudy. Lows in the upper 40s. Highs in the lower 70s. Northwest winds around 5 mph. .FRIDAY... Mostly clear. Lows around 50. Highs in the lower 70s. West winds around 6 mph. .SATURDAY... Partly cloudy. Lows around 50. Highs in the lower 70s. .SUNDAY... Partly cloudy. Lows in the upper 40s. Highs in the upper 60s. $$ Forecaster...Russell Requested by...Kyle Lapham Type of request...PRESCRIBED .TAG 2613854.1/PDT .DELDT 05/18/26 .FormatterVersion 2.0.0 .EMAIL Kyle.Lapham@dnr.wa.gov,Dylan.walters@dnr.wa.gov