Walla Walla, Washington Weather Forecast Discussion

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FXUS66 KPDT 022026
AFDPDT
Area Forecast Discussion
National Weather Service Pendleton OR
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