ACUS11 KWNS 112158
SWOMCD
SPC MCD 112158=20
WIZ000-IAZ000-MNZ000-112330-

Mesoscale Discussion 1253
NWS Storm Prediction Center Norman OK
0458 PM CDT Wed Jun 11 2025

Areas affected...portions of northern Iowa

Concerning...Severe Thunderstorm Watch 408...

Valid 112158Z - 112330Z

The severe weather threat for Severe Thunderstorm Watch 408
continues.

SUMMARY...Severe wind should continue over the next couple of hours
with ongoing supercells, especially if they can merge their cold
pools to support MCS upscale growth. A couple instances of severe
hail may also occur.

DISCUSSION...At least one supercell, with a history of wind damage
and gusts around 70 mph, along with sub-severe hail, continues to
track along a baroclinic boundary. Some of the latest MRMS mosaic
radar data depicts other robust thunderstorms near the ongoing
supercell, which may be in the process of merging. If these storms
merge into an MCS while traversing this boundary, additional severe
gusts are likely, accompanied by a secondary threat of large hail.

..Squitieri.. 06/11/2025

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!5SY2NjYYJdNzCZ0H02JpwUkIcY9wIEFTL-1bNlgU1zrdVZuPU8-AIgUNqoUkAsU_pUSRTOaba= 8IEA7pCJQRKFvA-NyQ$ for graphic product...

ATTN...WFO...DVN...ARX...DMX...

LAT...LON 42339185 42389393 42569430 42759454 42899450 43229412
43509259 43469148 43269114 42849096 42559102 42429117
42339185=20

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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