Mesoscale Discussion 1702
   NWS Storm Prediction Center Norman OK
   0554 PM CDT Thu Sep 17 2020

   Areas affected...northeast South Carolina into eastern North
   Carolina

   Concerning...Tornado Watch 493...

   Valid 172254Z - 180100Z

   The severe weather threat for Tornado Watch 493 continues.

   SUMMARY...The threat for a couple tornadoes continues this evening,
   primarily from far northeast South Carolina into southeast North
   Carolina.

   DISCUSSION...The environment across southern parts of the watch
   remains favorable for tornadoes, where dewpoints are at or above 75
   F. The primary area of concern is with storms moving across the
   Myrtle Beach area, where velocity couplets have been noted on radar.
   Low-level wind shear remains favorable as well, with 0-1 SRH in
   excess of 200 m2/s2 measured on the LTX VWP.

   The widespread convection and rain over northern areas may limit the
   threat there, but the higher dewpoints across the south will
   maintain sufficient instability to support a continued tornado
   threat.

   ..Jewell.. 09/17/2020

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

   ATTN...WFO...MHX...RAH...ILM...

   LAT...LON   33457897 33647914 34067917 34527890 34897798 34987739
               34937700 34747686 34597694 34427742 34077771 33767782
               33827817 33727849 33457897