Ritter, Oregon Weather Forecast Discussion

846
FXUS66 KPDT 202056
AFDPDT
Area Forecast Discussion
National Weather Service Pendleton OR
156 PM PDT Sat Sep 20 2025
.DISCUSSION...Satellite imagery reveals multiple features of
interest in the Pacific. A closed low centered off the coast of
central California is advecting remnants of tropical moisture
northward into the Blue Mountains region, leading to PWATs of
150-200% of normal. To the northwest, a closed low is churning in
the Gulf of Alaska, and water vapor imagery shows a shortwave
diving southeast towards the Pacific Northwest. Ahead of the
shortwave, a frontal boundary is draped from Vancouver Island
southwest into the Pacific.
Today, there is a slight chance (10-15%) of isolated showers and
thunderstorms across the Blue Mountains, roughly from the Bend
metro area eastward. Cross-Cascade pressure gradients will drive
breezy winds through the Cascade gaps into wind-prone areas of the
Columbia Basin today. While some areas will approach Red Flag
thresholds for wind and low relative humidity, confidence was too
low (

NWS PDT Office Area Forecast Discussion