ACUS11 KWNS 300227
SWOMCD
SPC MCD 300226=20
IAZ000-NEZ000-SDZ000-300400-

Mesoscale Discussion 1841
NWS Storm Prediction Center Norman OK
0926 PM CDT Tue Jul 29 2025

Areas affected...portions of eastern Nebraska into western Iowa

Concerning...Severe Thunderstorm Watch 557...559...

Valid 300226Z - 300400Z

The severe weather threat for Severe Thunderstorm Watch 557, 559
continues.

SUMMARY...Severe gusts will continue with the ongoing MCS for at
least a few more hours.

DISCUSSION...The earlier MCS that progressed across southern SD has
merged with the NE line to form an elongated MCS structure.
Nonetheless, the merged remnants of the older MCS continues to
propagate southeast along a baroclinic boundary with continued
reports of severe gusts. Though vertical wind shear is weak, the MCS
continues to thrive amid strong to extreme buoyancy. The MCS will
begin to merge with preceding storms that have formed off of another
frontal boundary, but is nonetheless poised to continue producing
severe gusts. Local watch extensions and/or a new Severe
Thunderstorm Watch issuance farther south may be needed.

..Squitieri.. 07/30/2025

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-PIihSjkCT2qnZqqbSaXRexnXAr9v0xPaK-W4H8TBbxXPJfI3MTDzTsai6oZFSKL_7aso5l5L= 62hxXzXPwSx508iIpw$ for graphic product...

ATTN...WFO...DMX...FSD...OAX...GID...

LAT...LON 43489698 42759451 42319418 41849419 41389464 41039537
40879594 40919668 41189735 41669762 41879778 42119781
42389780 42649751 42889728 43489698=20

MOST PROBABLE PEAK WIND GUST...65-80 MPH
MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN


=3D =3D =3D
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