Subj : DAY48SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Wed Jun 14 2023 08:54:27

ACUS48 KWNS 140854
SWOD48
SPC AC 140852

Day 4-8 Convective Outlook
NWS Storm Prediction Center Norman OK
0352 AM CDT Wed Jun 14 2023

Valid 171200Z - 221200Z

....DISCUSSION...
Medium-range output remains suggestive that blocking could become
more prominent within the large-scale flow over interior North
America during the early to middle portion of next week.  Subsequent
to mid/upper trough amplification over the interior West late this
weekend, a downstream mid-level high may evolve near/north of the
upper Great Lakes region, while mid-level troughing (and perhaps an
embedded low) develop east of the lower Mississippi Valley.

Prior to these developments, it appears that the lingering remnants
of initial troughing emerging from the subtropical eastern Pacific
and Southwest will continue to progress around the northern
periphery ridging over the southern Great Plains this weekend.  With
seasonably strong shear and instability remaining focused along this
corridor, the potential for organized severe thunderstorm seems
likely to persist.  This may include supercells and an upscale
growing cluster across the central Great Plains late Saturday into
Saturday night, with perhaps a more notable signal for the evolution
of a substantive organized convective cluster across parts of the
Ozark Plateau and Mid South, into adjacent portions of the Gulf
Coast states, Sunday through Sunday night.

...Kerr.. 06/14/2023

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