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Mesoscale Discussion 218 |
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Mesoscale Discussion 0218
NWS Storm Prediction Center Norman OK
0152 AM CDT Thu Mar 18 2021
Areas affected...Portions of the FL Panhandle...southeastern
AL...and western GA
Concerning...Tornado Watch 36...38...
Valid 180652Z - 180815Z
The severe weather threat for Tornado Watch 36, 38 continues.
SUMMARY...An isolated severe threat continues early this morning,
including the potential for a tornado.
DISCUSSION...Convection has weakened across western GA over the past
couple of hours, as it has generally outpaced the low-level moisture
return and moved into an increasingly more stable environment.
Farther south, strong storms are ongoing across parts of the FL
Panhandle into southeastern AL. A wind gust of 48 kt (55 mph) was
recently reported at KPRN in south-central AL. VWPs from KEOX and
KEVX ahead of the broken line show decent veering/strengthening of
the wind profile with height through mid levels. With 250+ m2/s2 of
effective SRH present across the warm sector, a tornado remains a
possibility with any storm that can remain surface based.
Strong/gusty outflow winds may also occur with the more linear
convection in the western FL Panhandle and south-central AL. The
overall severe threat will probably remain fairly isolated through
the early morning hours, as the best large-scale forcing for ascent
associated with an upper trough/low over the lower/mid MS Valley
remains displaced to the north of the central Gulf Coast.
..Gleason.. 03/18/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...FFC...TAE...BMX...MOB...
LAT...LON 30268766 30868723 31968593 32478495 32418441 32088434
31678475 30858580 30388654 30268766
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