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Mesoscale Discussion 161
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MD 161 graphic

   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.

   ..Darrow.. 03/20/2018

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...ILM...CHS...CAE...JAX...TAE...

   LAT...LON   30778311 33638060 33637870 30788123 30778311 

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