Subj : DAY1SVR: Day 1 Convective Outlook
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Fri Dec 09 2022 12:24:57

ACUS01 KWNS 091224
SWODY1
SPC AC 091223

Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0623 AM CST Fri Dec 09 2022

Valid 091300Z - 101200Z

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

....SUMMARY...
Severe thunderstorms are not expected through early Saturday.

....Synopsis...
Within a progressive/zonal flow regime aloft, one shortwave trough
will move eastward today from the middle MS Valley to the OH Valley
and Appalachians, while gradually losing amplitude.  South of the
midlevel trough path, isolated thunderstorms will be possible this
morning along a stalled front from southeast AR into northern MS/AL,
prior to the threat diminishing by midday.  An upstream shortwave
trough now moving over the northern Great Basin will continue
eastward to the central Plains overnight.  Farther south, separate
speed maxima will eject east-northeastward from southern AZ/NM
toward the southern High Plains.  In response to strengthening
southerly low-level flow and warm advection, the threat for elevated
thunderstorms will increase tonight across OK.

Farther west, an amplifying midlevel trough will approach the
Pacific coast early Saturday.  Some weak elevated convection is
expected within the primary frontal precipitation band, but
near-surface destabilization will be limited inland until near 12z.

...Thompson/Leitman.. 12/09/2022

$$

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