Subj : DAY48SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Fri May 26 2023 08:42:15

ACUS48 KWNS 260842
SWOD48
SPC AC 260840

Day 4-8 Convective Outlook
NWS Storm Prediction Center Norman OK
0340 AM CDT Fri May 26 2023

Valid 291200Z - 031200Z

....DISCUSSION...
With a break in the eastern blocking pattern (by Day 5/Tuesday) that
has persisted the past week or so, diurnal thunderstorm activity may
shift further east across the Plains through the period. A tongue of
seasonal boundary-layer moisture will stretch from the southern
Plains to the northern Plains and Upper Midwest vicinity. Some
low-end severe potential may exist on Day 4/Monday across the
northern Plains as a weak upper shortwave trough migrates northeast
across the Dakotas. However, weak vertical shear and modest
instability preclude a 15 percent delineation. Thereafter, a general
lack of impactful synoptic features, and a persistent weak/low
amplitude regime will limit severe potential for much of the period.

...Leitman.. 05/26/2023

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