|Mesoscale Discussion 161|
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Mesoscale Discussion 0161
NWS Storm Prediction Center Norman OK
0148 PM CDT Tue Mar 20 2018
Areas affected...Coastal GA...Coastal SC
Concerning...Tornado Watch 18...
Valid 201848Z - 202015Z
The severe weather threat for Tornado Watch 18 continues.
SUMMARY...Tornado threat continues across coastal GA and SC.
DISCUSSION...Latest satellite imagery strongly supports eastward
progression of large-scale forcing into southeast GA/western SC.
Convection is responding to this feature with upscale growth in
thunderstorms along a corridor from Ware County GA to Berkeley
County SC. 18z sounding from CHS exhibited substantial SBCAPE (~2600
J/kg) with modest mid-level lapse rates...more than supportive of
robust updrafts. Given the strengthening shear, supercells and
organized clusters will progress across the remainder of ww18 likely
moving offshore by 21/00z. Latest CAMs guidance support this and
tornado threat continues across the entire watch.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 30778311 33638060 33637870 30788123 30778311
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