Excessive Rainfall Discussion
NWS Weather Prediction Center College Park MD
735 PM 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...

...2000 UTC Update...
Based on the latest (12Z) model QPFs and trends (lower ensemble
means), along with the lowering snow levels, have removed the
Marginal Risk area that was in play across northern ID into
northwest MT). QPFs across the Sierra meanwhile average between
0.5-1.0" during the 24 hr period; given this along with the absence
of any elevated instability, have removed the Marginal area that
was in effect over the northern Sierra.

Hurley

...Previous Discussion...
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.

Bann

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