Subj : DAY2SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Sun Dec 04 2022 06:58:10

ACUS02 KWNS 040658
SWODY2
SPC AC 040656

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1256 AM CST Sun Dec 04 2022

Valid 051200Z - 061200Z

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

....SUMMARY...
No severe weather is expected across the U.S. on Monday.

....Discussion...
Generally westerly flow aloft will prevail across most of the U.S.
Monday, as a zone of tight height gradient persists between the
large central/northern Canada vortex, and ridging over the Gulf of
Mexico.  As a weak low just off the California coast devolves into
an open wave, and digs southeastward across the far western U.S. and
adjacent eastern Pacific, ridging across the Gulf of Mexico will
modestly amplify.  The result will be a gradual reorientation of the
upper flow over the U.S. to a more southwesterly direction.

At the surface, a reinforcing cold front is forecast to shift
southeastward across the Upper Great Lakes into the Midwest/Ohio
Valley, and southward into the southern Plains.  Warm
advection/isentropic lift in the vicinity of this boundary should
support weak convective development, mainly during the second half
of the period across parts of the Mid Mississippi/Tennessee Valley
vicinity.  Occasional lightning may occur within this zone of
convection.  Elsewhere, some lightning may also occur over portions
of northern California, as cold air aloft associated with the
weakening upper low shifts inland.  In both areas, and elsewhere, no
severe weather is expected.

...Goss.. 12/04/2022

$$

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