Spot Forecast
Issued by NWS Pendleton, OR
Issued by NWS Pendleton, OR
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012 FNUS76 KPDT 251328 FWSPDT Spot Forecast for Tracy Hill RX...USFS National Weather Service Pendleton OR 628 AM PDT Wed Sep 25 2024 Forecast is based on ignition time of 0600 PDT on September 25. ***Thunderstorms imply gusty and erratic winds*** ***Winds are 20 foot 10-minute averages*** ***CWR-Chance of wetting rain 0.10 or greater*** If you have questions or concerns with this forecast, please contact our office at (541) 276-8134. .DISCUSSION...A cold front will sweep across south central Washington this afternoon with the estimated time of arrival at the burn site between 1300-1500 PDT. The front will only bring a light amount of rain to the Cascade east slopes. There will also be enough instability for an isolated thunderstorm. The cool marine air spreading through the Columbia River Gorge will keep RHs high. Nearby showers or thunderstorms could bring outflow winds of 25-30 mph. It will be cooler but drier and less wind on Thursday. .TODAY... Sky/weather.........Increasing clouds, becoming mostly cloudy (75-85 percent). Sprinkles or a brief shower before 1000 PDT. Chance of showers and a slight chance of thunderstorms after 1000 PDT. CWR.................less than 10 percent. LAL.................1 until 1100, then 2. Max temperature.....65-68. Min humidity........59-64 percent. Wind (20 ft)........West 5-8 mph increasing to 8-13 mph gusting to 20 mph between 0900-1300...then increasing to 10-15 mph gusting to 25 mph after 1300. Gusty and erratic winds expected near thunderstorms. Ridgetop wind.......West 5-8 mph increasing to 10-18 mph gusting to 23 between 1000-1400, then 15-20 mph gusting to 30 mph after 1400. Mixing height.......rising to 2500 ft AGL during the mid-morning. Transport winds.....West 18-23 mph. Haines Index........3 or very low potential for large plume dominated fire growth. TIME (PDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM Temp............60 56 61 65 63 62 RH..............71 85 83 74 75 74 20 ft wind......W 5 W 8 W 10 W 13 W 14 W 15 20 ft wind gust. 12 18 20 23 25 .TONIGHT... Sky/weather.........Mostly cloudy (80-90 percent) then becoming partly cloudy (25-35 percent). Chance of rain showers early in the evening. CWR.................less than 10 percent. LAL.................1. Min temperature.....44-47. Max humidity........92-97 percent. Wind (20 ft)........West 10-15 mph gusting to 25 mph decreasing to 8-12 mph after 2100. Ridgetop wind.......West 15-20 mph gusting to 30 mph decreasing to 10-15 mph gusting to 20 mph after 2100. Winds 8-12 mph by early Thursday morning. Mixing height.......lowering to 700 ft AGL in the evening. Transport winds.....West 18 mph decreasing to around 8 mph early in the morning. Haines Index........3 or very low potential for large plume dominated fire growth. .THURSDAY... Sky/weather.........Sunny (0-10 percent). CWR.................0 percent. LAL.................1. Max temperature.....65-68. Min humidity........36-41 percent. Wind (20 ft)........West-Northwest 4-9 mph. Ridgetop wind.......West-Northwest 8-12 mph. Mixing height.......rising to 3500 ft AGL late in the morning. Transport winds.....West 12 mph. Haines Index........3 or very low potential for large plume dominated fire growth. $$ Forecaster...Wister Requested by...Lauren Clark Type of request...PRESCRIBED .TAG 2422974.1/PDT .DELDT 09/25/24 .FormatterVersion 2.0.0 .EMAIL christopher.harper@usda.gov,lauren.clark@usda.gov,keith.mcmillen@usda.gov