Subj : DAY48SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Fri Sep 05 2025 08:55:48

ACUS48 KWNS 050855
SWOD48
SPC AC 050854

Day 4-8 Convective Outlook
NWS Storm Prediction Center Norman OK
0354 AM CDT Fri Sep 05 2025

Valid 081200Z - 131200Z

....DISCUSSION...
Upper-level ridging within the West will slowly shift into the
Plains this weekend and into perhaps the middle of next week. Modest
to moderate mid-level flow will generally continue across the
Midwest/Northeast. In the West, current guidance shows a trough
slowly making progress east next week. Model guidance has shown a
high degree of variability with regard to how this western trough
will evolve through time. Expansive surface high pressure will be
present in parts of the Plains and points eastward. With time, this
high will move east and promote southerly return flow across the
Plains. This process will accelerate as the western trough
approaches. While some strong to severe storms will be possible as
moisture returns northward, the timing and location of this
potential largely depends on where surface boundaries set up and
where smaller scale perturbations will eject into the Plains. The
predictability of these features remains low at this time.

...Wendt.. 09/05/2025

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