Subj : DAY48SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Tue Jul 15 2025 06:53:56

ACUS48 KWNS 150653
SWOD48
SPC AC 150652

Day 4-8 Convective Outlook
NWS Storm Prediction Center Norman OK
0152 AM CDT Tue Jul 15 2025

Valid 181200Z - 231200Z

....DISCUSSION...
Low-amplitude/zonal westerly mid/upper flow is forecast across the
northern U.S. for much of the Day 4-8 period. At the same time, the
subtropical upper ridge/high over the Southeast will spread
westward, with larger-scale upper ridging developing over the
central U.S. late in the forecast period. Seasonally moist and
unstable conditions will exist for much of the CONUS east of the
Rockies. This will lead to daily thunderstorm activity, particularly
for parts of the northern/central Plains to the Midwest and
Mid-Atlantic regions. These areas will generally be on the north
side of the subtropic high and the southern fringes of any stronger
westerly flow near the international border. However, a lack of any
stronger forcing for ascent or notable surface features precludes
severe probabilities.

...Leitman.. 07/15/2025

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