Subj : DAY48SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Sun Dec 24 2023 09:39:53

ACUS48 KWNS 240938
SWOD48
SPC AC 240937

Day 4-8 Convective Outlook
NWS Storm Prediction Center Norman OK
0337 AM CST Sun Dec 24 2023

Valid 271200Z - 011200Z

....DISCUSSION...
An amplified upper pattern will emerge during the Day 4-8 period. An
upper low over the Midwest and an attendant large-scale trough will
persist for most of the period while gradually shifting east.
Meanwhile, an upper ridge over the western U.S. will remain in place
until around Days 7-8/Sat-Sun when an eastern Pacific upper trough
moves inland over CA. As surface low pressure and a cold front move
offshore the Atlantic coast during the first half of the period,
strong surface high pressure and a dearth of boundary-layer moisture
will result in dry/stable conditions across much of the CONUS. Some
rain/thunderstorm chances may develop across CA late in the period
as the aforementioned upper trough moves inland, though severe
thunderstorms are not expected.

...Leitman.. 12/24/2023

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