Subj : DAY2SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Tue Dec 27 2022 16:35:48

ACUS02 KWNS 271635
SWODY2
SPC AC 271634

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1034 AM CST Tue Dec 27 2022

Valid 281200Z - 291200Z

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

....SUMMARY...
Organized severe thunderstorms are not forecast across the
contiguous United States on Wednesday.

....Synopsis...
A longwave mid-level trough will traverse the Intermountain West and
eject into the Plains states tomorrow/Wednesday. Multiple mid-level
impulses embedded within the broader longwave trough will foster
localized ascent in the presence of marginal buoyancy to support
isolated thunderstorm development in a couple of regions. First, a
mid-level impulse will overspread the Four Corners region,
accompanied by cooler temperatures and steep mid-level lapse rates
during the afternoon hours, when lightning flashes are most likely
to occur. Later at night, a lead impulse ejecting into the Plains
will promote a low-level warm-air/moisture advection regime across
the lower MS Valley, where isolated thunderstorm development is
possible. A lightning flash or two cannot be ruled out along the
Pacific Northwest coastline toward the end of the period as another
mid-level impulse with cooler mid-level temperatures approaches the
region.

...Squitieri.. 12/27/2022

$$

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