|Mesoscale Discussion 1141|
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Mesoscale Discussion 1141
NWS Storm Prediction Center Norman OK
0450 PM CDT Fri Jun 23 2017
Areas affected...Kentucky...Far Western Virginia...Southwestern West
Virginia...Far Southern Ohio
Concerning...Tornado Watch 368...
Valid 232150Z - 232345Z
The severe weather threat for Tornado Watch 368 continues.
SUMMARY...An isolated tornado threat should continue for a few more
hours across parts of central and eastern Kentucky. The threat is
expected to remain mostly confined to the area covered by WW 368 and
no additional weather watch issuance is expected.
DISCUSSION...The remnants of Cindy are currently moving into the
Ohio Valley with the center of circulation located in the
southwestern part of WW 368 across southern Kentucky. Ahead of the
circulation, instability is weak but the airmass is very moist with
surface dewpoints in the lower 70s F and precipitable water values
in the 2.00 to 2.25 range according to the RAP. In addition, the
WSR-88D VWPs at Charleston, WV and Tri-Cities, TN show 0-6 km shear
near 40 kt with 0-3 km storm relative helicity around 250 m2/s2. The
low-level shear over south-central Kentucky appears to be even
stronger associated with a low-level speed max at 850 mb. The
low-level shear will continue to support a tornado threat across
central and eastern Kentucky into early evening. The greatest
tornado threat would be associated with the smaller more discrete
cells that remain along the edge of the rain shields currently
moving through central and eastern Kentucky at this time. The
low-level speed max is forecast to move across eastern Kentucky and
into southern West Virginia later this evening but the tornado
threat is expected to become marginal by then.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 38408185 38628402 37408569 36778571 36628498 36768269
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