MD 0466 CONCERNING SEVERE THUNDERSTORM WATCH 117… FOR PORTIONS OF FAR SOUTHEAST MINNESOTA…FAR NORTHEAST IOWA…SOUTHWESTERN WISCONSIN
Mesoscale Discussion 0466
NWS Storm Prediction Center Norman OK
0803 PM CDT Tue Apr 04 2023
Areas affected...portions of far southeast Minnesota...far northeast
Iowa...southwestern Wisconsin
Concerning...Severe Thunderstorm Watch 117...
Valid 050103Z - 050230Z
The severe weather threat for Severe Thunderstorm Watch 117
continues.
SUMMARY...The severe threat continues across Severe Thunderstorm
Watch #117. Large hail appears to be the main threat this evening
and overnight.
DISCUSSION...Multiple multicellular and transient supercell
thunderstorms have developed across Severe Thunderstorm Watch #117
over the past few hours. So far, most of the reported hail has been
sub-severe, as also suggested by the last couple hours of MRMS
mosaic MESH data. These storms are elevated and are benefiting from
500-1000 J/kg MUCAPE, driven primarily by 8 C/km mid-level lapse
rates (shown by the 00Z mesoanalysis). Given the steep lapse rates
in place, hail (some stones reaching severe limits) should remain a
concern over the next few hours.
..Squitieri.. 04/05/2023
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...GRB...MKX...DVN...ARX...DMX...
LAT...LON 43919222 44099126 44169027 43968941 43158897 42598918
42489046 42549165 42569228 42799266 43919222
