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Mesoscale Discussion 1822
NWS Storm Prediction Center Norman OK
1256 AM CST Mon Nov 30 2020
Areas affected......Northern Florida...Southern Georgia...
Concerning...Severe potential...Watch possible
Valid 300656Z - 300930Z
Probability of Watch Issuance...40 percent
SUMMARY...A wind-damage and tornado threat may develop tonight
across parts of northern Florida and southern Georgia. Weather watch
issuance could become necessary.
DISCUSSION...The latest surface analysis shows 1003 mb low in
western Georgia with a cold front extending southward from the low
into far southeast Alabama and the Florida Panhandle. A corridor of
maximized low-level moisture is present ahead of the front from the
far eastern Gulf of Mexico extending northward into the eastern
Florida Panhandle and southwestern Georgia. The RAP is indicating
that moderate instability exists along this corridor from southwest
of Albany, Georgia to the coast south of Tallahassee, where MLCAPE
is estimated in the 1000 to 1200 J/kg range. Thunderstorms are
ongoing near the instability axis and will continue to move eastward
over the next few hours. Instability should continue to be
maintained or could slowly increase ahead of the storms across
northern Florida and south-central Georgia. In addition, the
Tallahassee WSR-88D VWP shows 0-6 km shear near 60 kt and 0-3 km
storm relative helicity near 400 m2/s2, which will support a
conditional severe threat. The main uncertainty is storm mode. If
the storms can exhibit supercell characteristics, then a tornado and
wind-damage threat will likely develop. The area will continue to be
monitored for the possibility of watch issuance.
..Broyles/Edwards.. 11/30/2020
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...TBW...JAX...TAE...
LAT...LON 29188305 29598356 29748390 29798431 29798453 30008497
30508487 31348457 31688427 31798338 31258211 29748217
29188305
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