FNUS76 KPDT 051213 FWSPDT Spot Forecast for Little Dean 18...USFS National Weather Service Pendleton OR 513 AM PDT Tue May 5 2026 Forecast is based on ignition time of 0600 PDT on May 05. ***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...Warm, dry conditions are forecast today. Winds are expected (80 percent confidence) to become north to northeast later this morning through afternoon, and gusty. There is a very low (10 percent) chance of showers and even lower (2 percent) chance of thunderstorms. Overnight and Wednesday, lighter terrain-driven winds are forecast. .TODAY... Sky/weather.........Mostly sunny (5-15 percent) becoming partly cloudy (20-40 percent) by afternoon. Very low (10 percent) chance of rain showers in the afternoon. CWR.................1 percent. Chance of lightning.2 percent. Max temperature.....65-68. Min humidity........27-32 percent. Wind (20 ft)........Northwest winds 5-8 mph with gusts up to 15 mph early morning, becoming north winds 10-15 mph with gusts of 20-30 mph by middle to late morning. Ridgetop wind.......Northwest winds 6-10 mph with gusts up to 15 mph early morning, becoming north winds 15-25 mph with gusts of 25-40 mph by middle to late morning. Mixing height.......Increasing to 6000-6500 ft AGL by late morning. Transport winds.....North 10-15 mph increasing to 20-25 mph late in the morning. Ventilation Index...Low (180) increasing to very high (1050) in the afternoon. TIME (PDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM Chc of ltng (%).0 0 0 0 2 2 Temp............49 53 58 64 66 66 RH..............61 53 43 33 30 30 20 ft wind......NW 7 N 7 N 14 N 15 N 15 N 15 20 ft wind gust.15 15 24 26 28 28 .TONIGHT... Sky/weather.........Mostly clear (10-20 percent). CWR.................0 percent. Chance of lightning.1 percent. Min temperature.....44-47. Max humidity........49-54 percent. Wind (20 ft)........North winds 8-12 mph with gusts of 15-25 mph in the evening, becoming drainage 1-5 mph overnight. Ridgetop wind.......North winds 12-17 mph with gusts of 20-30 mph in the evening, becoming northwest 3-7 mph overnight. Mixing height.......Decreasing to 200-600 ft AGL overnight. Transport winds.....North 20-25 mph in the evening, decreasing to 5-15 mph overnight. Ventilation Index...Moderate (360) decreasing to low (30) overnight. .WEDNESDAY... Sky/weather.........Mostly sunny (5-15 percent), becoming partly cloudy (20-40 percent) by afternoon. CWR.................0 percent. Chance of lightning.2 percent. Max temperature.....70-73. Min humidity........23-28 percent. Wind (20 ft)........Drainage winds 1-5 mph very early morning, becoming upslope then upvalley winds 2-6 mph by early to mid-morning. Ridgetop wind.......West to northwest winds 3-7 mph very early morning, becoming east to northeast 8-12 mph by early to mid-morning. Mixing height.......Increasing to 6500-7000 ft AGL by late morning. Transport winds.....Northwest 8-12 mph. Ventilation Index...Low (30) increasing to moderate (460) in the afternoon. $$ Forecaster...Plunkett Requested by...Brett Johnson Type of request...PRESCRIBED .TAG 2612699.0/PDT .DELDT 05/05/26 .FormatterVersion 2.0.0 .EMAIL brett.johnson@usda.gov,jeffrey.duke@usda.gov,shane.dillavou@usda.gov