FNUS76 KPDT 221948 FWSPDT Spot Forecast for Flank 4 and 5...USFS National Weather Service Pendleton OR 1248 PM PDT Sun Mar 22 2026 Forecast is based on ignition time of 0900 PDT on March 23. ***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...Moderate (35-45 percent) overnight humidity recoveries Monday morning will lead to another dry and slightly warmer day across the fire area. Clouds will increase in the evening and overnight as improved overnight humidities are expected ahead of a cold front. Winds will increase through the early morning hours on Tuesday and peak through the early to mid- afternoon associated with the cold front passage. There is a slight chance (30-40 percent) of experiencing a light shower at the site, but amounts should be minimal (less than 0.02"). .MONDAY... Sky/weather.........Partly sunny (55-65 percent). CWR.................0 percent. Chance of lightning.0 percent. Max temperature.....60-64. Min humidity........14-19 percent. Wind (20 ft)........Light winds becoming west 5 to 8 mph with gusts to around 16 mph after 1400, peaking between 1500 and 1800. Ridgetop wind.......Light winds becoming west 5 to 10 mph with gusts to around 18 mph after 1400, peaking between 1500 and 1800. Mixing height.......4800 ft AGL. Transport winds.....Northwest around 6 mph shifting to the southwest 6 to 12 mph late in the morning. Ventilation Index...Poor (30) increasing to fair (270) 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............41 51 58 60 60 55 RH..............37 28 22 17 19 29 20 ft wind......NE 2 E 3 NE 4 W 6 W 8 W 6 20 ft wind gust.4 6 10 13 16 14 .MONDAY NIGHT... Sky/weather.........Mostly cloudy (60-70 percent). Chance of rain (30 percent) after 0500. CWR.................0 percent. Chance of lightning.0 percent. Min temperature.....45-48. Max humidity........51-56 percent. Wind (20 ft)........West winds 5 to 8 mph with gusts to around 16 mph shifting to the southwest after midnight. Ridgetop wind.......West winds 5 to 10 mph with gusts to around 18 mph shifting to the southwest after midnight. Mixing height.......800 ft AGL. Transport winds.....West 9 to 12 mph shifting to the southwest 16 to 21 mph overnight. Ventilation Index...Fair (220) decreasing to poor (120) overnight. .TUESDAY... Sky/weather.........Partly sunny (60-70 percent). Chance of rain (30-40 percent). CWR.................2 percent. Chance of lightning.1 percent. Max temperature.....57-61. Min humidity........37-42 percent. Wind (20 ft)........Southwest winds 5 to 10 becoming 12 to 17 mph with gusts up to 35 mph after 1000, peaking between 1200 and 1700. Ridgetop wind.......Southwest winds 6 to 12 mph becoming 14 to 20 mph with gusts up to 37 mph after 1000, peaking between 1200 and 1700. Mixing height.......4300 ft AGL. Transport winds.....Southwest 16 to 23 mph increasing to 29 to 37 mph late in the morning. Ventilation Index...Fair (200) increasing to excellent (1050) in the afternoon. .FORECAST DAYS 3 THROUGH 5... .WEDNESDAY... Cooler. Mostly cloudy. Chance of rain and slight chance of snow. Lows in the upper 30s. Highs in the upper 40s. Southwest winds around 9 mph. .THURSDAY... Partly cloudy. Lows in the mid 20s. Highs in the upper 40s. Light winds. .FRIDAY... Warmer. Partly cloudy. Lows in the upper 20s. Highs in the upper 50s. Light winds. $$ Forecaster...Callihan Requested by...Natalie Kuntz Type of request...PRESCRIBED .TAG 2607113.0/PDT .DELDT 03/22/26 .FormatterVersion 2.0.0 .EMAIL natalie.kuntz@usda.gov,ryan.ruklic@usda.gov,daniil.slepukhin@usda.gov