MD 1417 CONCERNING SEVERE THUNDERSTORM WATCH 458… FOR SOUTHWESTERN AND SOUTH-CENTRAL SOUTH DAKOTA AND INTO NORTH-CENTRAL NEBRASKA
Mesoscale Discussion 1417
NWS Storm Prediction Center Norman OK
0713 PM CDT Tue Jun 25 2024
Areas affected…southwestern and south-central South Dakota and
into north-central Nebraska
Concerning…Severe Thunderstorm Watch 458…
Valid 260013Z – 260145Z
The severe weather threat for Severe Thunderstorm Watch 458
continues.
SUMMARY…Risk for large hail and damaging winds continues locally,
with greatest risk in the short term apparent over the southwestern
South Dakota vicinity.
DISCUSSION…Latest radar loop shows a storm moving southeastward
out of Jackson County into Bennett County South Dakota at this time.
This cell emerged from a cluster of weaker convection east of the
Black Hills, but has intensified and organized rapidly over the past
hour into a supercell with HP characteristics as it encounters an
axis of greater boundary-layer moisture/mixed-layer CAPE. Along
with potential for damaging wind gusts, large hail in excess of 2″
in diameter is likely with this cell, as it moves southeastward at
near 40 kt.
Elsewhere, more isolated/potentially severe storms will likewise
continue moving southeastward over the next 1 to 2 hours, with large
hail and locally damaging winds possible in/near WW 458.
..Goss.. 06/26/2024
…Please see www.spc.noaa.gov for graphic product…
ATTN…WFO…FSD…LBF…UNR…
LAT…LON 43590275 43890158 43409959 42059933 41800060 42470202
43050267 43590275
