Subj : MESO: Mesoscale Discussion 1911
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Sat Aug 09 2025 12:30:42

ACUS11 KWNS 091230
SWOMCD
SPC MCD 091229=20
WIZ000-IAZ000-MNZ000-NEZ000-091430-

Mesoscale Discussion 1911
NWS Storm Prediction Center Norman OK
0729 AM CDT Sat Aug 09 2025

Areas affected...portions of IA into southeast MN and far
west-central WI

Concerning...Severe Thunderstorm Watch 580...

Valid 091229Z - 091430Z

The severe weather threat for Severe Thunderstorm Watch 580
continues.

SUMMARY...Severe thunderstorms producing damaging wind gusts will
persist across portions of western into north-central Iowa this
morning.

DISCUSSION...Severe gusts continue with the cluster of storms
ongoing across west-central IA this morning. Radar trends have shown
some downward trend in velocity strength as well as a somewhat more
disorganized presentation in reflectivity. Nevertheless, measured
severe gusts and wind damage reports continue as convection develops
northeast along/just ahead of a surface cold front.=20

The downstream airmass remains strongly unstable, and convection
will persist along the length of the surface front from west-central
WI into southeast MN and northern/western IA. The core of the
low-level jet remains centered just east of ongoing storms, and
stronger vertical shear tends to lag behind the surface boundary.
Convection along the front in MN/WI has largely been unproductive
overnight. While strong to severe gusts remain possible in the short
term across IA, it is unclear if severe potential and a downstream
watch will be needed into MN/WI.

...Leitman.. 08/09/2025

....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=
g!6NM2hlb5lT904Vg9ZM84t0D_SO7vQ6r-PmOQgk7FfTFvhT4GFd3ib2p-h1Cigyo6Sdaax3K1J=
NpuT7OODTKXeP1C5sg$  for graphic product...

ATTN...WFO...ARX...MPX...DMX...FSD...OAX...

LAT...LON   42209589 43369401 44109232 44219166 44139112 43929084
            43649094 42089297 41699356 41289449 41359542 41519595
            41799610 42209589=20

MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 95 MPH
MOST PROBABLE PEAK WIND GUST...65-80 MPH
MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 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)

.