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