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
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