Subj : DAY2SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Sun Apr 30 2023 05:22:37

ACUS02 KWNS 300522
SWODY2
SPC AC 300520

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1220 AM CDT Sun Apr 30 2023

Valid 011200Z - 021200Z

....NO SEVERE THUNDERSTORM AREAS FORECAST...

....SUMMARY...
The severe-thunderstorm threat is expected to be low on Monday.

....Synopsis...
A deep longwave trough will remain in place across the
central/eastern CONUS on Monday, as a large deep-layer cyclone moves
slowly eastward across the upper Great Lakes region. Dry and stable
conditions east of the Rockies will result in very limited
thunderstorm potential, with the possible exception of low-topped
convection across the upper Great Lakes. Some low-level moisture
return is expected across south TX, but this area will likely remain
capped through the day. Farther west, a deep mid/upper-level cyclone
will move slowly southward just off of the Pacific Coast, with an
expanding area of at least isolated thunderstorm potential.

....Interior Northwest...
Weak (but sufficient) instability and favorable large-scale ascent
attendant to the mid/upper-level cyclone will support thunderstorm
potential on Monday across parts of the interior Northwest.
Deep-layer shear will be sufficient for modestly organized
convection, and a few storms capable of small hail and locally
strong gusts will be possible across parts of Idaho and Oregon
during the afternoon and evening. At this time, any severe potential
appears too limited in magnitude and too isolated in coverage to
support probabilities.

...Dean.. 04/30/2023

$$

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