ZCZC SPCSWOMCD ALL
ACUS11 KWNS 171837 
SPC MCD 171837 
MIZ000-OHZ000-172000-

Mesoscale Discussion 0473
NWS Storm Prediction Center Norman OK
0137 PM CDT Wed Apr 17 2024

Areas affected...central and eastern Michigan

Concerning...Severe Thunderstorm Watch 121...

Valid 171837Z - 172000Z

The severe weather threat for Severe Thunderstorm Watch 121
continues.

SUMMARY...A large hail and damaging wind threat persists across
eastern Michigan.

DISCUSSION...A broken line of storms continues to move east across
Lower Michigan. Only a few damaging wind gust reports have been
received thus far with measured gusts of 28 and 35 knots at KLAN and
KJXN as the line moved through. Therefore, the majority of this line
is likely producing sub-severe wind gusts with occasional severe or
near severe wind gusts possible, particularly with any mesovorticies
within the line.  Otherwise, the only large hail was reported from
the supercell which developed ahead of the line and moved through
the south side of Lansing. The window for additional supercell
development ahead of the line is closing as the line moves into
increasingly stable air across eastern Michigan with a somewhat Lake
Erie modified airmass. However, stronger cores may be possible
across far southeast Michigan where greater instability is present.

..Bentley.. 04/17/2024

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...CLE...DTX...APX...IWX...GRR...

LAT...LON   41758453 41988449 42628456 43198465 43858488 44038429
            44238303 43998261 43448246 43008236 42648245 42288278
            42168290 41688321 41758453 

NNNN