699 
FXUS01 KWBC 201927
PMDSPD

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
327 PM EDT Tue Oct 20 2026

Valid 00Z Wed Oct 21 2026 - 00Z Fri Oct 23 2026

...Norâ€easter impacts winding down across portions of the
Mid-Atlantic Coast this week...

...Excessive rainfall impacts return to the Southwest/Four
Corners...

A Nor'easter situated off the Mid-Atlantic coastline is forecast
to maintain an offshore northward track over the next 48 hours. As
such, coastal flooding conditions along Mid-Atlantic and Northeast
will begin to improve through Thursday. The National Hurricane
Center continues to monitor this system for subtropical
development, although by Thursday evening this system will curve
further out to sea.

Elsewhere, an amplifying upper trough in the East Pacific will tap
tropical moisture as it digs into the Western U.S. this week. This
anomalous moisture will surge northward into the Southwest and
Four Corners region starting Wednesday, when an approaching
surface low pressure system will act as a focus for showers and
thunderstorms  capable of producing scattered flash flooding
across Central/Southern California, the Four Corners, and Desert
Southwest. On Thursday, the flash flooding focus will remain over
the Four Corners, although some lingering heavy rainfall is
possible over Southern California.

Temperatures will be below average in the West as the upper-trough
and associated cold front swing through. Meanwhile, a building
ridge in the Central U.S. will promote above average to well above
average temperatures through this weekend. As the Nor'easter pulls
away, high temperatures in the East climb to just above average,
although overnight lows near freezing are possible in parts of the
Northeast and New England tonight and tomorrow.

Asherman/Kebede


Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php



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