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Mesoscale Discussion 1329
NWS Storm Prediction Center Norman OK
1243 PM CDT Fri Jul 24 2020
Areas affected...The Carolinas
Concerning...Severe potential...Watch unlikely
Valid 241743Z - 241915Z
Probability of Watch Issuance...5 percent
SUMMARY...Storms capable of isolated damaging wind gusts will be
possible this afternoon and evening. A weather watch is not
anticipated.
DISCUSSION...Afternoon visible satellite and RADAR data showed a
cluster of thunderstorms developing over the Blue Ridge mountains in
the western Carolinas. Theses storms are likely associated with a
weak mid-level vort max rotating around the periphery of a ridge of
high pressure centered over the southern US. With warm and moist
surface conditions (dewpoints in the upper 60s to 70s F) supporting
MLCAPE of 1500-2000 J/kg, additional storm development is expected
this afternoon. Vertical shear is very weak, less than 15kt from SPC
mesoanalysis. This should favor a pulsey, multi-cellular mode with
little storm organization. Despite the weak organization, the
favorable CAPE and DCAPE (6-800 J/kg) should continue to support
robust updrafts and a few stronger downdrafts capable of isolated
damaging wind gusts through this evening. Given the limited severe
threat coverage and lack of broader organization, a weather watch is
unlikely.
..Lyons/Goss.. 07/24/2020
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...CAE...GSP...MRX...FFC...
LAT...LON 33948035 33528064 33688146 34098228 34688309 35168394
35658367 35408213 34968110 34438035 33948035
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