145
FXUS01 KWBC 110801
PMDSPD

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
400 AM EDT Fri Sep 11 2026

Valid 12Z Fri Sep 11 2026 - 12Z Sun Sep 13 2026

...Lingering front maintains unsettled weather across the Lower
Mississippi Valley, Southeast, and Mid-Atlantic...

...Northern Pacific systems usher in cool and wet weather over
portions of the Northwest and Northern Tier...

This evening, the weather map over the Lower 48 highlights a
stationary frontal boundary extending from the Ohio Valley into
the Southern Plains. While this front recently provided
much-needed relief from the heat to the Nation`s midsection, this
feature is expected to weaken over the next two days as
temperatures warm again across the South-Central and Eastern U.S.
In fact, a few daily high temperature records could fall in the
Southern Plains this weekend as daytime highs climb into the
upper-90s and triple digits. The increasingly warm and unstable
air will also interact with the front and a disturbance aloft to
yield a broad area of showers and thunderstorms this weekend from
the Lower Mississippi Valley through the Mid-Atlantic. Isolated to
scattered heavy rainfall and flash flooding will be the main
concern with this activity, particularly with any storms tomorrow
near the Central Appalachians and the I-95 corridor from
Philadelphia to Washington D.C.

Meanwhile, the Northern Tier remains active as a pair of Pacific
systems push two well defined fronts across the Western U.S. and
international border this weekend. Portions of the Upper
Mississippi Valley and Upper Midwest are being monitored today for
scattered heavy rain and severe weather potential later this
afternoon along the cold front from the lead system. With time,
however, expect the focus for thunderstorms and heavy rainfall to
shift southward toward the Central Plains this weekend with the
arrival of the leading front. Further west, the second Pacific
system is expected to pivot over the Northwest late Saturday,
spreading beneficial soaking rains across the region through the
Northern Rockies. Some mixed precipitation will even be possible
Sunday morning in the Northern Rockies beneath the base of the
second system, with high temperatures 15-20 degrees below normal
expected to close out the weekend. South of this activity, monsoon
thunderstorms will continue for the next several days over the
Southwest, although coverage of storms could briefly wane
tomorrow. Even so, the potential for isolated flash flooding will
remain each day, especially over vulnerable burn scars, dry
washes, or slot canyons.


Asherman


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






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