Subj : DAY3SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Wed Dec 18 2024 18:59:01

ACUS03 KWNS 181858
SWODY3
SPC AC 181857

Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
1257 PM CST Wed Dec 18 2024

Valid 201200Z - 211200Z

....NO THUNDERSTORM AREAS FORECAST...

....SUMMARY...
Thunderstorms are not expected across the Lower 48 on Friday.

....Synopsis...
A large-scale mid/upper-level trough will persist across much of the
central/eastern CONUS on Friday, as a significant embedded shortwave
moves from the Ohio Valley vicinity towards the Carolinas and
eventually offshore. A reinforcing cold front attendant to the
shortwave trough will move southward across the Gulf of Mexico and
Florida Peninsula. Dry/stable conditions and the influence of an
expansive post-frontal surface ridge should limit destabilization
and thunderstorm potential east of the Rockies.

Across the West, a mid/upper-level shortwave trough is forecast to
move across the Pacific Northwest early in the day and weaken with
time. In its wake, a stronger trough over the eastern Pacific will
begin to approach the OR/northern CA coast late Friday night.
Convection with sporadic lightning flashes may accompany this
stronger shortwave trough and approach near-coastal areas early
Saturday morning, but thunderstorm potential is currently expected
to remain largely offshore through the end of the period.

...Dean.. 12/18/2024

$$

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