775
ACUS02 KWNS 291711
SWODY2
SPC AC 291710

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1210 PM CDT Mon Sep 29 2025

Valid 301200Z - 011200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Severe storms appear unlikely on Tuesday.

...Synopsis and Discussion...
A deep upper low will exist off the coast of British Columbia, with
a large area of cyclonic flow aloft encompassing much of the western
states. Cooling aloft with a leading wave as well as daytime heating
will lead to scattered thunderstorms over parts of the Great Basin
into MT, but with relatively weak instability.

To the east, an upper ridge will exist from the MS Valley into the
upper Great Lakes, with an upper trough from New England into the
Maritimes. Midlevel moisture over the Southeast as well cool
temperatures aloft could yield isolated thunderstorms over the
southern Appalachians during the afternoon, while daytime heating
and coastal convergence within a moist air mass support a few cells
developing over eastern/southeastern coasts of the FL Peninsula.

Elsewhere, a surface trough will develop over the northern High
Plains, with instability developing from northern MN into ND.
Thunderstorms chances are generally low in these areas due to weak
ascent, but a storm or two cannot be ruled out near peak heating.

..Jewell.. 09/29/2025

$$