Subj : DAY2SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Tue Dec 26 2023 06:31:09

ACUS02 KWNS 260631
SWODY2
SPC AC 260629

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1229 AM CST Tue Dec 26 2023

Valid 271200Z - 281200Z

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

....SUMMARY...
Severe thunderstorms are not expected on Wednesday.

....Synopsis...

A large upper cyclone will be centered over the Mid-MS Valley on
Wednesday. This system and associated upper trough will move only
modestly eastward through the period. Deep-layer southwesterly flow
ahead of the upper low/trough will be maintained over the eastern
third of the CONUS. At the surface, low pressure off the SC coast
will lift north/northeast. The center of the low will pass near or
just offshore from the NC Outer Banks. Showers will be ongoing
across the Mid-Atlantic Wednesday morning. While generally poor
lower-level lapse rates and little heating will limited instability,
some modest midlevel lapse rates will support modest elevated
instability, and isolated thunderstorms are possible across coastal
NC. A surface cold front will move offshore the Mid-Atlantic during
the evening/overnight hours. Severe thunderstorms are not expected.

Across the West, a weak upper shortwave trough will quickly move
across the Pacific Northwest. A few lightning flashes are possible
offshore from the northern CA/OR/WA coasts, but overall chances for
inland lightning appear lower than previously indicated given meager
elevated instability.

...Leitman.. 12/26/2023

$$

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