Excessive Rainfall Discussion
NWS Weather Prediction Center College Park MD
1019 AM EST Sun Dec 14 2025
Day 3
Valid 12Z Tue Dec 16 2025 - 12Z Wed Dec 17 2025

...THERE IS A MARGINAL RISK OF EXCESSIVE RAINFALL LINGERING OVER
PARTS OF THE PACIFIC NORTHWEST INTO FAR NORTHWEST CALIFORNIA...

Precipitation lingers from Washington southward along the Cascades
and the coastal ranges into northwest California on Tuesday and
into the early morning hours on Wednesday. With much of that
falling post-frontal and the heavier precipitation amounts falling
in the form of snow in the northern Cascades...will maintain the
Marginal Risk area for the time. Once again the main adjustments to
the outlook areas were to limit the overlap of excessive rainfall
with heavy areas mainly in Washington. The complex terrain of
northern Idaho and northwest MT made it difficult to avoid
overlapping but the idea is for any excessive rainfall to occur at
lower elevation locations in light of lowering thickness vales/snow
levels.

Bann

Day 3 threat area: www.wpc.ncep.noaa.gov/qpf/99epoints.txt