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Mesoscale Discussion 1735
NWS Storm Prediction Center Norman OK
0544 PM CDT Sat Oct 10 2020
Areas affected...Eastern New York...Vermont...and New Hampshire
Concerning...Severe Thunderstorm Watch 499...
Valid 102244Z - 110045Z
The severe weather threat for Severe Thunderstorm Watch 499
continues.
SUMMARY...Although a gradual weakening trend is expected, the threat
for damaging wind gusts, and perhaps an instance of severe hail,
will continue into the evening hours with any robust convection
within WW 499.
DISCUSSION...IR satellite and lightning trends over the past hour
have shown a gradual decrease in convective intensity as storms move
into a more capped air mass across NH/ME and southeast NY. Despite
these trends, a few wind reports have been noted within the past
hour and strong flow remains in place over the region (50-60 knot
winds within the lowest 2-3 km layer observed by the KCXX VWP).
Recent RAP Mesoanalysis estimates show sufficient MLCAPE values
(around 500 J/kg) remain over NY and VT with strong 45-55 knots of
deep layer shear despite prior convection. Although a weakening
trend will likely continue through the evening due to nocturnal
cooling, the strong flow and sufficient instability may allow any
stronger convective cells that manage to develop (either along the
trough axis or along the approaching cold front) to pose the risk of
damaging winds and perhaps severe hail.
..Moore/Dial.. 10/10/2020
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...GYX...BTV...ALY...BGM...BUF...
LAT...LON 43507590 44427509 44887404 44967277 44977187 44827102
44597071 44157089 43877130 43447216 43227324 43047387
43027458 43027506 43097552 43227583 43507590
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