Subj : DAY1SVR: Day 1 Convective Outlook
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Thu Mar 27 2025 00:47:17

ACUS01 KWNS 270046
SWODY1
SPC AC 270045

Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0745 PM CDT Wed Mar 26 2025

Valid 270100Z - 271200Z

....THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
THE PACIFIC NORTHWEST...

....SUMMARY...
Severe thunderstorms remain possible across parts of the Pacific
Northwest this evening, with supercells possible west of the
Cascades across Oregon into Washington. These storms may produce
large hail, perhaps a brief tornado, and severe wind gusts.

....01z Update...

Deep convection has struggled to organize across western OR/WA early
this evening, possibly due to extensive cloudiness. Even so,
temperatures remain warm with readings in the mid 70s from Portland
north into Lewis County WA. Westerly boundary-layer flow is
increasing and upslope flow may be contributing to gradual uptick in
convection from Clark County into central Lewis County WA. This
activity is expected to grow upscale over the next few hours and
wind profiles favor supercell development. If this occurs, storms
will track north-northeast along the higher terrain, and large hail
should develop within these storms. Latest trends suggest the
greatest risk may be shifting into WA as large-scale forcing is
beginning to shift into this region.

Across the lower Rio Grande Valley, a lone supercell is tracking
southeast along the international border over southern Starr County.
Large hail has likely been noted with this storm, most likely along
the Mexican side of the border. Some risk for hail will be noted
with this storm for the next few hours.

...Darrow.. 03/27/2025

$$

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