|Mesoscale Discussion 662|
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Mesoscale Discussion 0662
NWS Storm Prediction Center Norman OK
1114 PM CDT Fri May 17 2019
Areas affected...central and eastern Nebraska...central and northern
Concerning...Tornado Watch 178...
Valid 180414Z - 180615Z
The severe weather threat for Tornado Watch 178 continues.
SUMMARY...Severe weather risk -- including potential for a couple of
tornadoes -- continues across WW 178, and the continuing portion of
DISCUSSION...Latest radar loop shows strong storms moving across
portions of central Nebraska/central Kansas at this time. One
long-lived supercell continues moving northeast across Pawnee County
KS toward Barton County Kansas, and this storm has had a history of
producing tornadoes. Meanwhile to the northeast, a 66 kt gust
occurred within the past hour with a bowing cluster of storms moving
across north-central Kansas.
Back to the west, convection has begun to develop along the surface
cold front, from central Nebraska into western Kansas -- which
should continue to evolve and shift across the central Plains over
the next several hours.
While the overall severe risk should remain lesser overnight than
was the case earlier this afternoon and evening, the overall
kinematic and thermodynamic environment remains supportive of
vigorous updrafts. With convective mode trending toward linear with
time, and some decoupling of the boundary layer evident due to
nocturnal cooling, risk should trend toward mainly hail, and to a
lesser degree locally strong wind gusts. This risk however may
prove sufficient to warrant new WW issuance across portions of
central and eastern Kansas/Nebraska -- with the remaining portion of
the Nebraska WW set to expire at 05Z.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 42799902 42729691 42129654 41419606 38839606 37829770
37909925 38230025 39650008 40450000 42799902
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