706 FNUS76 KPDT 161455 FWSPDT Spot Forecast for Summit 18...USFS National Weather Service Pendleton OR 755 AM PDT Fri Oct 16 2026 Forecast is based on ignition time of 0800 PDT on October 17. ***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...Elevated fire weather conditions through today and tomorrow with min RH's dropping down to the 10 to 20 percent range with some improvement Sunday. Winds will be light in general predominantly from the west then shifting to the south by Sunday. Otherwise, excellent overnight recoveries are forecasted with RH values up to 85 percent. .SATURDAY... Sky/weather.........Mostly sunny (20-30 percent). CWR.................0 percent. Chance of lightning.0 percent. Max temperature.....65-70. Min humidity........15-20 percent. Wind (20 ft)........Light winds becoming west 3 to 8 mph by 11 am. Ridgetop wind.......Light winds becoming west 5 to 10 mph by 11 am. Mixing height.......4900 ft AGL. Transport winds.....Southwest 10 to 20 mph shifting to the northwest late in the afternoon. Ventilation Index...Low (30) increasing to moderate (440) in the afternoon. TIME (PDT) 8 AM 10 AM NOON 2 PM 4 PM 6 PM Chc of ltng (%).0 0 0 0 0 0 Temp............37 52 60 63 61 55 RH..............44 31 25 23 25 38 20 ft wind......SE 3 SE 3 SW 5 W 6 W 6 NW 5 20 ft wind gust.4 4 8 10 10 8 .SATURDAY NIGHT... Sky/weather.........Mostly clear (15-25 percent). CWR.................0 percent. Chance of lightning.0 percent. Min temperature.....31-34. Max humidity........80-85 percent. Wind (20 ft)........Northwest winds 3 to 8 mph in the evening becoming light by 1 am. Ridgetop wind.......Northwest winds 5 to 10 mph in the evening becoming light by 1 am. Mixing height.......1600 ft AGL early in the evening. Transport winds.....Northwest 7 to 12 mph. Ventilation Index...Low (70) decreasing to low (40) overnight. .SUNDAY... Sky/weather.........Sunny (5-15 percent). CWR.................0 percent. Chance of lightning.0 percent. Max temperature.....60-65. Min humidity........25-30 percent. Wind (20 ft)........Light winds becoming south 3 to 8 mph by 11 am. Ridgetop wind.......Light winds becoming south 5 to 10 mph by 11 am. Mixing height.......3700 ft AGL late in the morning. Transport winds.....North 5 to 10 mph shifting to the south 10 to 20 mph late in the morning. Ventilation Index...Low (30) increasing to moderate (300) in the afternoon. $$ Forecaster...Day Requested by...David Maynard Type of request...PRESCRIBED .TAG 2623885.0/PDT .DELDT 10/16/26 .FormatterVersion 2.0.0 .EMAIL david.maynard@usda.gov