Subj : MESO: Mesoscale Discussion 1858
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Thu Jul 31 2025 23:34:15

ACUS11 KWNS 312332
SWOMCD
SPC MCD 312332=20
NEZ000-COZ000-SDZ000-WYZ000-010100-

Mesoscale Discussion 1858
NWS Storm Prediction Center Norman OK
0632 PM CDT Thu Jul 31 2025

Areas affected...Southeast WY...northeastern CO...and the NE
Panhandle

Concerning...Severe Thunderstorm Watch 563...

Valid 312332Z - 010100Z

The severe weather threat for Severe Thunderstorm Watch 563
continues.

SUMMARY...The risk of severe wind gusts will continue expanding
eastward over the next several hours. A downstream watch is not
currently expected, though local spatial extensions of the watch may
be warranted.

DISCUSSION...Loosely organized storm clusters are tracking eastward
across southeastern WY and northeastern CO this evening, which will
continue posing a risk of severe wind gusts. These storms are
evolving along a larger-scale cold pool which is spreading/expanding
eastward into a moderately unstable air mass. Recent radar data
indicates new updrafts developing along the leading outflow
boundary, and around 40 kt of gust-front-orthogonal effective shear
may be supporting the development of a loosely organized MCS with
eastward extent. The risk of scattered severe wind gusts (60-70 mph)
is the primary concern, prior to increasing nocturnal static
stability/inhibition tonight. A downstream watch is not currently
expected, though local spatial extensions of Severe Thunderstorm
Watch 563 may be warranted.

...Weinman.. 07/31/2025

....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=
g!4E-vIN7EMdo9poumUS8Fv3Xjc3xPWc84N6B3lJibEdX22z5Y3HWcD-cbx4ul3gs2Shm2yACI2=
doW1PHvsi7Jhp-L3wE$  for graphic product...

ATTN...WFO...UNR...BOU...CYS...RIW...

LAT...LON   40150456 41740457 42140493 42600610 42870609 43140569
            43200458 43020361 42610295 41180268 40240304 40010371
            40150456=20


=3D =3D =3D
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