Subj : DAY2SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Tue Sep 30 2025 17:07:31

ACUS02 KWNS 301707
SWODY2
SPC AC 301706

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1206 PM CDT Tue Sep 30 2025

Valid 011200Z - 021200Z

....NO SEVERE THUNDERSTORM AREAS FORECAST...

....SUMMARY...
The risk for severe thunderstorms appears negligible on Wednesday.

....Synopsis and Discussion...
An upper trough will remain over the northwestern states on
Wednesday as an upper low slowly fills off the coast of British
Columbia. Cool temperatures aloft combined with daytime heating may
yield isolated weak thunderstorms across coastal WA and perhaps over
northern ID and vicinity.

To the east, southwest flow aloft and a lead wave will affect the
northern Plains, where a surface trough and wind shift will develop.
Weak instability, some elevated, combined with a developing
southerly low-level jet may support isolated thunderstorms late
afternoon through evening, with little if any severe potential.

Elsewhere, an area of cooler air aloft will move from the Gulf
eastward across FL late Wednesday night, which when combined with
increasing shoreline convergence along the eastern shores of the FL
Peninsula could yield a few thunderstorms as a harsh midlevel
subsidence inversion is gradually reduced. For the daytime period,
little if any lightning is anticipated due to the inversion, though
shallow convective showers will still be possible.

...Jewell.. 09/30/2025

$$

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