Subj : DAY2SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Fri Feb 24 2023 17:09:24

ACUS02 KWNS 241709
SWODY2
SPC AC 241708

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1108 AM CST Fri Feb 24 2023

Valid 251200Z - 261200Z

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

....SUMMARY...
Isolated thunderstorms will be possible along the coast of southern
California Saturday into Saturday night. No severe weather is
expected.

....Discussion...
Relatively flat/featureless flow aloft will prevail across the
eastern half of the U.S. this period, while in the West, a deep
upper low -- initially off the California coast -- is forecast to
advance east-southeastward into southern California/southern Nevada
through the period.

At the surface, a low associated with the upper system is forecast
to shift across the Great Basin with time, while a trailing cold
front traverses southern California and then Arizona/southern Utah.

Given cold air/steep lapse rates aloft associated with the upper
low, very weak CAPE will persist across parts of coastal southern
California and vicinity.  As a result showers will persist across
the area, as well as some lightning -- possibly with a frontal
convective band early, but then later with post-frontal
cold-core-type convection.  Lack of ample instability should
preclude any appreciable severe risk.

Elsewhere, with surface high pressure prevailing east of the
Rockies, thunderstorms are not expected over the remainder of the
U.S. through Sunday morning.

...Goss.. 02/24/2023

$$

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