SPC MD 917



MD 0917 CONCERNING SEVERE THUNDERSTORM WATCH 253… FOR WESTERN INTO CENTRAL SD

MD 0917 Image


Mesoscale Discussion 0917
NWS Storm Prediction Center Norman OK
1150 PM CDT Thu Jun 10 2021

Areas affected...Western into central SD

Concerning...Severe Thunderstorm Watch 253...

Valid 110450Z - 110615Z

The severe weather threat for Severe Thunderstorm Watch 253
continues.

SUMMARY...A swath of significant severe wind appears increasingly
likely through 06Z.

DISCUSSION...A 78 mph wind gust was recently reported across
northwest SD, and a 72 mph gust with storms across southwest SD. In
addition, a cluster moving over the KUDX radar was producing 70-80
kt radar velocities at very low elevation above ground. With
additional strong updrafts noted across west-central SD, and a cold
front accelerating into the region, the potential for a swath of
significant severe wind should increase over the next 1-2 hours as
outflows continue to consolidate and stronger low-level flow near
and behind the cold front begins to catch up with ongoing
convection, within an environment of strong buoyancy and effective
shear.

..Dean.. 06/11/2021

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

ATTN...WFO...ABR...UNR...

LAT...LON   43320265 44030288 44550294 45290260 45510106 45470035
            44580008 43590001 43510035 43370149 43320265 

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