MD 1998 CONCERNING SEVERE THUNDERSTORM WATCH 647… FOR EASTERN TENNESSEE AND ADJACENT PORTIONS OF WESTERN NORTH CAROLINA…NORTHERN GEORGIA…NORTHEASTERN ALABAMA
Mesoscale Discussion 1998
NWS Storm Prediction Center Norman OK
1101 PM CDT Mon Aug 14 2023
Areas affected…eastern Tennessee and adjacent portions of western
North Carolina…northern Georgia…northeastern Alabama
Concerning…Severe Thunderstorm Watch 647…
Valid 150401Z – 150600Z
The severe weather threat for Severe Thunderstorm Watch 647
continues.
SUMMARY…Thunderstorm activity may persist several more hours
across the region, but the risk for severe weather is generally
waning. A new severe weather watch is not anticipated, and it is
possible Severe Thunderstorm Watch 647 could be cancelled prior to
its scheduled 3 AM EDT expiration.
DISCUSSION…Large-scale forcing for ascent, downstream of the
significant short wave trough digging into the lower Ohio Valley,
and residual elevated instability may maintain thunderstorm activity
across the Tennessee Valley into southern Appalachians vicinity
several more hours. However, cooling due to radiation, the
influence of convective outflow and cold advection are contributing
to substantial boundary-layer stabilization. As this progresses,
thunderstorm intensities and associated severe weather potential are
expected to continue to gradually diminish into the overnight hours.
..Kerr.. 08/15/2023
…Please see www.spc.noaa.gov for graphic product…
ATTN…WFO…GSP…MRX…FFC…OHX…HUN…
LAT…LON 36538339 36788227 36048185 34948403 34788528 35118640
36538339
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