861
FXUS01 KWBC 221829
PMDSPD

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
129 PM EST Sat Feb 22 2025

Valid 00Z Sun Feb 23 2025 - 00Z Tue Feb 25 2025

...Atmospheric River to bring heavy rain, gusty winds and
scattered instances of flooding to the Northwest through early
next week...

...Showers and thunderstorms with locally heavy rainfall along the
Gulf Coast...

...Temperatures begin to slowly moderate this weekend across the
southern U.S., while milder temperatures return to the Great
Plains...


Persistent troughing in the eastern Pacific will support an
Atmospheric River event across the Pacific Northwest this weekend.
Heavy rainfall is expected to develop this evening ahead of a
decaying surface low pressure system. Another system will
reinforce the moisture fetch and associated rainfall over the
Pacific NW on Sunday. Slight Risks of Excessive Rainfall leading
to Flash Flooding are in effect over coastal and inland valleys of
Washington and northern Oregon on Sunday and Monday, where between
4-7 inches of rainfall may accumulate. Moderate to heavy snow is
possible over higher levels of the Northern Cascades/Rockies
through Monday. Runoff from mountains could exacerbate drainage
issues and lead to small stream and river flooding as well.

A low pressure system will move across the Gulf Coast this
weekend. Scattered showers and thunderstorms are likely to develop
along a convergence zone that sets up along the coast. The
heaviest rainfall is expected Sunday afternoon/evening when a warm
front and instability work their way into the Central Gulf Coast.
Storms shift into the Florida Peninsula Sunday night into Monday.
There`s potential for isolated instances of Flash Flooding over
parts of South Florida on Monday.

Upper-level ridging over much of the West will expand into the
Central U.S. this weekend. Mild temperatures are likely to follow
suit, with highs in the Plains between 15-25 degrees above average
on Sunday and Monday. Temperatures moderate considerably over the
eastern half of the country due to the expanding ridge into the
Plains and a departing shortwave in the East. Parts of Texas will
experience a 30-40 degree high temperature swing between today and
Monday, in which highs will climb from the 40s today into the 70s
by Monday.


Kebede


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