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Mesoscale Discussion 0089
NWS Storm Prediction Center Norman OK
0850 AM CST Thu Feb 06 2020
Areas affected...northeast Georgia...western South Carolina and
central North Carolina
Concerning...Severe potential...Watch likely
Valid 061450Z - 061545Z
Probability of Watch Issuance...95 percent
SUMMARY...The threat for damaging wind and isolated tornadoes is
expected to increase this morning and persist into the afternoon
over a portion of the Carolinas. A tornado watch will be needed
soon.
DISCUSSION...The low-level jet will continue to strengthen to in
excess of 60 kt, supporting low-level theta-advection and
destabilization of the warm sector downstream from a line of
thunderstorms that currently extends from southwestern NC into
western SC and northeast GA. MLCAPE will likely increase to around
500 J/kg as temperatures and dewpoints slowly rise through the 60s
F. Winds aloft will remain mostly parallel to the convective line,
suggesting a relatively slow eastward advance compared to the rapid
northeast movement of cells or bowing segments within the line. VWP
data already show large low-level hodographs with 0-1 km storm
relative helicity from 300-400 m2/s2. Despite the linear nature of
the storms, isolated tornadoes will be possible with embedded
supercells or meso-vortices. Otherwise damaging wind should remain
the primary threat.
..Dial/Hart.. 02/06/2020
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...RAH...ILM...CAE...GSP...FFC...
LAT...LON 33638354 34348320 35188209 35608156 35878050 35987933
35567875 34617959 33358216 33638354
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