Subj : MESO: Mesoscale Discussion 1744
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Mon Jul 21 2025 00:57:30

ACUS11 KWNS 210056
SWOMCD
SPC MCD 210055=20
SDZ000-NDZ000-MTZ000-210230-

Mesoscale Discussion 1744
NWS Storm Prediction Center Norman OK
0755 PM CDT Sun Jul 20 2025

Areas affected...Southeast Montana/Southwest North Dakota and far
northwest South Dakota

Concerning...Severe Thunderstorm Watch 531...

Valid 210055Z - 210230Z

The severe weather threat for Severe Thunderstorm Watch 531
continues.

SUMMARY...Potential for large hail and severe-caliber wind gusts
will continue across southeast Montana and southwest North Dakota,
and possibly into far northwest South Dakota.

DISCUSSION...A few isolated supercells persist as of 750pm CDT/650pm
MDT particularly across southwest North Dakota within the primary
instability axis, while other clusters of storms have begun to
evolve and organize across southeast Montana south of I-94 and
near/east of I-90. Miles City, MT measured a 59 kt/68 mph wind gust
around 550pm MDT, while Big Horn County Airport more recently
measured a 75 mph gust. While episodic large hail will continue
regionally, severe-wind potential should somewhat focus across far
southeast Montana into far southwest North Dakota (potentially
including the Baker and Bowman areas), and possibly into far
northwest South Dakota over the next few hours as additional cell
mergers/upscale growth likely occurs.

...Guyer.. 07/21/2025

....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=
g!4uOkI27FRXjmOlVuK3M19_PR6BWFq3Vmq9OYhJwFIcvO-RswsOk-glAewcjDK8S_Ban6co4Y1=
M-CHZDdYwQ00uSSZzc$  for graphic product...

ATTN...WFO...ABR...BIS...UNR...BYZ...GGW...

LAT...LON   45830756 46930693 47140365 46560172 45790135 45470201
            45170575 45830756=20

MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 95 MPH
MOST PROBABLE PEAK WIND GUST...65-80 MPH
MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN


=3D =3D =3D
To unsubscribe from WX-STORM and you already have a login, go to
https://lists.illinois.edu and use the "Unsubscribe" link.  Otherwise email
Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM.

--- SBBSecho 3.28-Linux
 * Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105)

.