Subj : DAY2SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Sat Nov 04 2023 17:09:15

ACUS02 KWNS 041709
SWODY2
SPC AC 041707

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1207 PM CDT Sat Nov 04 2023

Valid 051200Z - 061200Z

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

....SUMMARY...
Isolated thunderstorms are possible across southeast Florida Sunday
through the early afternoon. Isolated thunderstorms are also
possible along the Pacific Northwest coast late Sunday night through
early Monday morning.

....Synopsis...

An upper trough will shift east across the eastern U.S. on Sunday.
Mostly zonal upper-level flow will envelop much of the rest of the
CONUS in the wake of the eastern trough, though a weak shortwave
impulse will migrate through westerly flow aloft near the
U.S./Canada border. A surface low and attendant cold front
associated with this weak shortwave impulse will move over the
northern Plains vicinity, shifting east toward the Upper Midwest and
Mid-MO Valley through the period. However, meager boundary-layer
moisture and little instability will preclude thunderstorm activity
ahead of this cold front.

Despite zonal flow, a strong mid/upper jet streak will move across
northern CA into the Great Basin and central Rockies. This will aid
in deep, moist onshore flow across the Pacific Northwest. Widespread
showers and isolated thunderstorms will be possible in this regime.

Additional isolated thunderstorms are possible over far southeast FL
where a moist boundary-layer will persist through the afternoon.
While the midlevels will be relatively warm, modest destabilization
should occur, and coupled with increasing large-scale ascent as the
upper trough approaches, a couple of thunderstorms will be possible
near the southeast FL coast or just offshore.

...Leitman.. 11/04/2023

$$

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