ACUS11 KWNS 030003
SWOMCD
SPC MCD 030003=20
MIZ000-030100-

Mesoscale Discussion 0339
NWS Storm Prediction Center Norman OK
0703 PM CDT Thu Apr 02 2026

Areas affected...south-central Lower Michigan

Concerning...Tornado Watch 90...

Valid 030003Z - 030100Z

The severe weather threat for Tornado Watch 90 continues.

SUMMARY...The threat for an isolated tornado or two continues across
the eastern portions of Tornado Watch 90.

DISCUSSION...A series of supercells have been observed across
portions of southwestern/south-central Lower Michigan over the last
1-2 hours. While these storms have quickly moved north in the
vicinity of a surface warm front due to deep-layer flow orientation,
periods of enhanced rotation have been noted with these cells in
close proximity to the surface boundary. Latest mesoanalysis depicts
weak buoyancy (250-500 J/kg MLCAPE) along and south of this
boundary. Despite this weak instability, clockwise-curved low-level
hodographs and 200-300 m2/s2 0-500 m SRH (per the IWX VWP) will
continue to support supercell structures capable of an isolated
tornado or two for another hour or so, especially in close proximity
to the surface warm front. With time, increasing low-level stability
owing to nocturnal cooling should act to reduce the severe threat.

..Chalmers.. 04/03/2026

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-D_G5cDmXFt7IpI1ccxpTKIrYLPBad7qrZAM6NCXMAqPOsCqvWpfqnYL0b40TS_TSIKAu2pcE= ycwiHTCvXsVdrSu2ZA$ for graphic product...

ATTN...WFO...IWX...GRR...

LAT...LON 42538536 42588515 42478474 42338454 42128453 41978468
41938491 41958523 42108551 42328548 42538536=20

MOST PROBABLE PEAK TORNADO INTENSITY...85-115 MPH
MOST PROBABLE PEAK WIND GUST...55-70 MPH


=3D =3D =3D
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