SPC MD 1166

MD 1166 CONCERNING SEVERE THUNDERSTORM WATCH 372... FOR SOUTHWESTERN SOUTH DAKOTA...WESTERN/CENTRAL NEBRASKA
MD 1166 Image


Mesoscale Discussion 1166
NWS Storm Prediction Center Norman OK
0812 PM CDT Tue Jun 27 2017

Areas affected...Southwestern South Dakota...Western/Central
Nebraska

Concerning...Severe Thunderstorm Watch 372...

Valid 280112Z - 280245Z

The severe weather threat for Severe Thunderstorm Watch 372
continues.

SUMMARY...Thunderstorm clusters capable of producing severe wind
gusts are progressing eastward across southwestern South Dakota and
west-central Nebraska.  The risk for severe winds from these
clusters will continue into the evening hours.

DISCUSSION...Thunderstorms have grown upscale across southwestern
South Dakota producing several measured wind gusts.  This organized
cluster of storms will move out of watch 372 over the next hour and
into downstream watch 373, where low-level moisture and instability
is maximized.

There is a relative minimum in thunderstorm coverage across northern
Nebraska with a second cluster of storms across west-central
Nebraska.  This cluster of storms appears less organized on radar
imagery and has not yet produced measured severe wind gusts.  As
this cluster moves into an area of better moisture and instability,
an increase in organization and intensity is expected over the next
few hours.  There is uncertainty regarding the eastward extent of
damaging wind gust potential as the boundary layer cools and
surface-based convective inhibition increases.

..Jirak/Hart.. 06/28/2017

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

ATTN...WFO...FSD...OAX...ABR...GID...LBF...UNR...

LAT...LON   41160176 41690150 42470132 43310167 43780215 44060210
            44220141 44359988 43479907 42669846 42159795 41329702
            40749734 40539885 40620026 40790147 41160176 

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