MD 1252 CONCERNING SEVERE THUNDERSTORM WATCH 409… FOR PARTS OF THE MIDWEST
Mesoscale Discussion 1252
NWS Storm Prediction Center Norman OK
0518 PM CDT Thu Jun 13 2024
Areas affected…Parts of the Midwest
Concerning…Severe Thunderstorm Watch 409…
Valid 132218Z – 132345Z
The severe weather threat for Severe Thunderstorm Watch 409
continues.
SUMMARY…Cluster of severe thunderstorms will propagate across
southeast Iowa/northeast Missouri into western Illinois. Very large
hail, possibly in excess of 2 inches, can be expected with this
activity.
DISCUSSION…An expanding cluster of severe thunderstorms has
developed over southeast IA/northeast MO early this evening. This
activity is evolving along a wind shift that extends from western
IL/southeast IA/northwest MO. Latest diagnostic data suggests this
convection is evolving within an air mass characterized by 3000 J/kg
MLCAPE and adequately sheared for sustained rotating updrafts.
Numerous reports of hail in excess of 2 inches have been received
with this convection. With time this cluster should grow upscale and
an MCS may ultimately evolve. Severe winds may become more common
if/when the MCS matures. Subsequent movement is expected across
western into central IL.
..Darrow.. 06/13/2024
…Please see www.spc.noaa.gov for graphic product…
ATTN…WFO…ILX…LSX…DVN…DMX…EAX…
LAT…LON 40808968 39769020 39869249 40509289 41089134 40808968
