939 FXUS66 KPDT 031712 AFDPDTArea Forecast Discussion National Weather Service Pendleton OR 1012 AM PDT Fri Oct 3 2025
Updated Aviation Discussion
.AVIATION...18z TAFs...VFR conditions expected at most sites, however area haze and smoke from regional wildfires may make for sub-VFR conditions at YKM and PSC during the day today. Risk is higher at YKM, where the smoke is less elevated. Elsewhere, expect generally W/NW winds at 8-12 kts, except for DLS, where winds could gust as high as 25 kts this afternoon. Skies will clear during the day today, before a sct-bkn mid-level ceiling moves in this evening. Evans/74
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PREV DISCUSSION... /issued 126 PM PDT Thu Oct 2 2025/
DISCUSSION...
Key Messages:
1. Periods of showers and isolated thunderstorms today.
2. Cooler conditions through the weekend.
3. Cold morning temperatures Sunday through Tuesday.
Current radar and visible satellite imagery showing spotty, light returns along the Blue Mountains and the east slopes of the Cascades under mostly cloudy skies. This is in response to an upper level trough and associated cold front stalling along the coast. The deepening offshore trough and erosion of the ridge to our east will promote the potential for isolated afternoon thunderstorms across areas of Central Oregon and the Blue Mountains/Foothills. The HREF advertises 100-200 J/kg of surface CAPE, low level shear of 50-55kts, and lapse rates of around 6/km. These parameters do suggest the potential for isolated, discrete storm cells to form, but should stay brief and sub-severe (
NWS PDT Office Area Forecast Discussion