SPC MD 1974



MD 1974 CONCERNING SEVERE THUNDERSTORM WATCH 652… FOR NORTHERN OH…EXTREME EAST-CENTRAL IN

MD 1974 Image

Mesoscale Discussion 1974
NWS Storm Prediction Center Norman OK
0616 PM CDT Fri Sep 13 2019

Areas affected...Northern OH...Extreme east-central IN

Concerning...Severe Thunderstorm Watch 652...

Valid 132316Z - 140045Z

The severe weather threat for Severe Thunderstorm Watch 652
continues.

SUMMARY...Thunderstorms capable of locally damaging winds and
perhaps marginally severe hail will remain possible this evening,
with a gradual weakening trend expected with time.

DISCUSSION...A general weakening trend has been noticed recently the
longer-lived convective cluster across north-central OH, with some
redevelopment noted further west from east-central IN into northwest
OH. MLCAPE of 1000-1500 J/kg and effective shear of 25-35 kt may
support some organization with the strongest cells, with some threat
for isolated damaging wind and/or marginally severe hail. However,
as large-scale ascent associated with the upper trough over the
Upper Great Lakes lifts away from the region and MLCINH increases
this evening, a gradual decrease in the severe thunderstorm threat
is expected with time, and downstream watch issuance is not
currently anticipated.

..Dean/Goss.. 09/13/2019

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

ATTN...WFO...CLE...ILN...DTX...IWX...IND...

LAT...LON   40158536 40768468 41078436 41418406 42038336 42018274
            41898183 41478160 40918214 40608257 40408315 40258383
            40068453 40158536 

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