|Mesoscale Discussion 767|
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Mesoscale Discussion 0767
NWS Storm Prediction Center Norman OK
0633 PM CDT Thu May 18 2017
Areas affected...Far northeast PA...central NY...VT...western
Concerning...Severe Thunderstorm Watch 237...
Valid 182333Z - 190100Z
The severe weather threat for Severe Thunderstorm Watch 237
SUMMARY...Broken line of storms is expected to gradually weaken over
the next few hours and a downstream watch is not currently
anticipated. Isolated damaging wind gusts remain possible.
DISCUSSION...Broken line of strong to occasionally severe
thunderstorms currently extends from central VT southwestward into
north-central PA. Enhanced unidirectional flow aloft is supporting
easterly motion at approximately 40 kt. Most of this activity has
shown fairly persistent updraft strength over the past hour or so
but the expectation is for a general weakening trend to begin soon
as the storms encounter a more hostile thermodynamic environment
downstream across southern VT, western MA, and the Hudson Valley
region of NY. As a result, a downstream watch is not anticipated.
Even so, steep low-level lapse rates fostered by record-breaking
temperatures across the region will still support a localized
damaging wind threat for the next few hours.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 43727405 44477286 44747197 44657155 43967170 42777238
42277334 41807486 41707694 42417672 43727405
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