|Mesoscale Discussion 1643|
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Mesoscale Discussion 1643
NWS Storm Prediction Center Norman OK
0811 PM CDT Mon Sep 11 2017
Areas affected...Central/southern South Carolina
Concerning...Tornado Watch 485...
Valid 120111Z - 120215Z
The severe weather threat for Tornado Watch 485 continues.
SUMMARY...A limited tornado threat will persist throughout the
evening, although this threat should remain isolated enough so that
Tornado Watch 485 can expire as scheduled without replacement.
DISCUSSION...Despite persistently strong low-level shear and modest
buoyancy, recent radar/satellite presentation suggest relatively
shallow convection across the discussion area with generally weak
low-level rotation in bands/convective cells. This has resulted in
a very isolated tornado threat with convection migrating quickly
northwestward into the region from open Atlantic Waters.
High-resolution guidance suggest that this region of marginal
buoyancy and strong shear will shift northeastward along the coast
with time, continuing to support occasional updraft rotation and
perhaps a tornado overnight into portions of northeastern South
Carolina. However, recent trends suggest that this threat will be
isolated, with a slowly cooling boundary layer (especially in inland
areas) further lessening this risk.
Convective trends will be monitored, although the issuance of a new
Tornado Watch appears unlikely at this time.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 33658092 33658049 33757977 33847944 33877910 33787876
33567868 33157878 32927887 32507906 32117945 31977990
32048047 32318099 32958142 33298154 33558127 33658092
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