Subj : DAY3SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Fri Oct 25 2024 06:27:12

ACUS03 KWNS 250627
SWODY3
SPC AC 250625

Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0125 AM CDT Fri Oct 25 2024

Valid 271200Z - 281200Z

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

....SUMMARY...
Isolated thunderstorms are possible on Sunday across parts of the
Pacific Northwest coastal vicinity. Severe thunderstorms are not
expected.

....Synopsis...

A large-scale upper trough will move over the Pacific Coast states
on Sunday. As this occurs, cooling aloft will result in steepening
lapse rates and weak elevated instability, especially over the
Pacific Northwest. Increasing midlevel moisture will further support
isolated thunderstorms near the WA/OR and northern CA coasts.

Further east, a broad upper ridge will migrate across the Plains to
the MS Valley. Surface high pressure will maintain a mostly dry
airmass east of the MS River. However, a strengthening surface
trough over the Plains in response to the departing upper ridge and
approaching western upper trough will result in some northward
transport of modest Gulf moisture on southerly low-level flow.
However, warm midlevel temperatures will preclude thunderstorm
potential.

...Leitman.. 10/25/2024

$$

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