Subj : DAY48SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Fri Apr 11 2025 08:33:17

ACUS48 KWNS 110832
SWOD48
SPC AC 110830

Day 4-8 Convective Outlook
NWS Storm Prediction Center Norman OK
0330 AM CDT Fri Apr 11 2025

Valid 141200Z - 191200Z

....DISCUSSION...
....D4/Monday...
Further amplification of a broadening mid/upper-level trough and
attendant surface cyclone is expected across the Upper Great Lakes
to the southern ON/QC border area. Poleward moisture quality from
the western Gulf will remain sub-optimal, but will continue to
improve beneath a lobe of the southern Great Plains EML. The
northeast extent of weak surface buoyancy should overspread the OH
Valley by Monday afternoon. This portion of the front will coincide
with robust 700-500 mb southwesterlies, yielding potential for
fast-moving convection. Guidance consensus suggests this will remain
the favored corridor for at least a damaging wind threat.

....D7/Thursday...
Guidance has trended towards greater amplification of a Prairie
Provinces to north-central CONUS upper trough, although run-to-run
continuity is quite poor. This would be accompanied by a cold front
sweeping southeast into the South-Central States. With potentially
greater low-level moisture relative to the D3-4 system, some severe
potential may become evident once predictability improves.

...Grams.. 04/11/2025

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