909
FXUS01 KWBC 211820
PMDSPD

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
219 PM EDT Mon Sep 21 2026

Valid 00Z Tue Sep 22 2026 - 00Z Thu Sep 24 2026

...There is a Moderate Risk (level 3/4) of excessive rainfall over
parts of the Southern Rockies/Southern High Plains/Southwest on
Tuesday and Wednesday...

...There is a Slight Risk (level 2/4) of excessive rainfall over
parts of the Central Appalachians/Mid-Atlantic to the Middle
Mississippi Valley on Monday...

A wave of low pressure over the Central Appalachians/Mid-Atlantic
will linger over the region and produce heavy rain over parts of
the Central Appalachians/Mid-Atlantic. Therefore, the WPC has
issued a Slight Risk (level 2/4) of excessive rainfall over parts
of the region through Tuesday morning. The associated heavy rain
will create mainly localized areas of flash flooding, with urban
areas, roads, small streams, and low-lying areas being the most
vulnerable. In addition, scattered showers and thunderstorms will
extend from the Mid-Atlantic westward to parts of the Northern
Plains, Middle Mississippi Valley, and the Southern Plains through
Tuesday. Showers and thunderstorms will develop over parts of the
Ohio Valley, Mid-Atlantic, and Central/Southern Appalachians into
parts of the Southeast on Wednesday.

Upper-level energy and moisture moving northwestward from the Gulf
will produce showers and thunderstorms with heavy rain over parts
of the Southwest/Southern Rockies. Therefore, the WPC has issued a
Moderate Risk (level 3/4) of excessive rainfall over parts of the
Southwest/Southern Rockies on Tuesday into Wednesday morning.
Numerous flash flooding events are possible. In addition, many
streams may flood, potentially affecting larger rivers. The
flooding may include debris flows in or near recently burned
areas.

On Wednesday, the showers and thunderstorms with heavy rain will
continue over parts of the Southern Rockies/Southern High
Plains/Southwest. Therefore, the WPC has issued a Moderate Risk
(level 3/4) of excessive rainfall over parts of the Southern
Rockies/Southern High Plains/Southwest on Wednesday into Thursday
morning. Numerous flash flooding events are possible. In addition,
many streams may flood, potentially affecting larger rivers. The
flooding may include debris flows in or near recently burned
areas. Also on Wednesday, showers and thunderstorms will develop
over parts of the Northern/Central Plains.


Ziegenfelder


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






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