Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
254 AM EDT Tue Oct 27 2026

Valid 12Z Tue Oct 27 2026 - 12Z Thu Oct 29 2026

�Snow will develop over parts of the higher elevations of the Cascades,
Northern Intermountain Region/Northern Rockies on Monday and Tuesday�

...There is a Slight Risk of excessive rainfall over parts of the Southern
High Plains...

Onshore flow and upper-level troughing will produce light rain over parts
of the Pacific Northwest with higher-elevation snow and lower-elevation
rain over the Cascades, the Northern Intermountain Region, and the
Northern Rockies through Thursday. Meanwhile, a front moving westward
across Florida and onshore flow will produce showers and thunderstorms
over southern Florida and along the eastern coast through Thursday.

Moreover, easterly flow off the Gulf will aid in producing showers and
thunderstorms over the Western Gulf Coast through Wednesday evening.
Upper-level energy will create heavy rain over southern Texas overnight
Wednesday into Thursday. Therefore, the WPC has issued a Slight Risk
(level 2/4) of excessive rainfall over southern Texas with these
thunderstorms. The associated heavy rain will create mainly localized
areas of flash flooding, with urban areas, roads, small streams, narrow
canyons/gullies, and burn scars the most vulnerable.

A wave of low pressure over the Northern Plains/Upper Mississippi Valley
will slowly dissipate by Tuesday evening, while producing rain over parts
of the Upper Mississippi Valley and Central/Southern Plains on Tuesday
morning into early afternoon. A second wave of low pressure over the
Northern High Plains will produce rain over parts of the Northern/Central
Plains and the Upper/Middle Mississippi Valley on Wednesday morning.
Showers and thunderstorms will develop over the Upper Mississippi Valley
and Upper Great Lakes on Wednesday evening. By Thursday morning, rain will
develop along and ahead of the boundary over parts of the Great Lakes and
into the Middle Mississippi Valley.


Ziegenfelder


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

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