Excessive Rainfall Discussion
NWS Weather Prediction Center College Park MD
256 PM EDT Wed Mar 11 2026
Day 2
Valid 12Z Thu Mar 12 2026 - 12Z Fri Mar 13 2026

...THERE IS A MARGINAL RISK OF EXCESSIVE RAINFALL OVER PORTIONS OF
THE PACIFIC NORTHWEST...

19z Update: No major changes to the inherited Marginal risk area.

Chenard

...Previous Discussion...

Only change was to nudge the Marginal risk back to the west just a
bit given the placement of heavier snowfall in the Cascades.
Despite that change...much of the shift made by the previous shift
was retained in this outlook.

On-shore flow of deep moisture into parts of coastal Washington
and northern Oregon persists into the Day 2 period...with occasional
moderate to locally heavy rainfall continuing along the coastal
ranges. An additional 1 to 3 inches of rainfall in 24 hours is
possible...which could result in isolated flooding ot run off
problems in areas of poor drainage.

Bann


Day 2 threat area: www.wpc.ncep.noaa.gov/qpf/98epoints.txt