Mesoscale Discussion 1671
   NWS Storm Prediction Center Norman OK
   0720 PM CDT Wed Sep 02 2020

   Areas affected...Maryland...Delaware...southeast
   Pennsylvania...southern New Jersey

   Concerning...Severe Thunderstorm Watch 484...

   Valid 030020Z - 030215Z

   The severe weather threat for Severe Thunderstorm Watch 484
   continues.

   SUMMARY...Strong wind gusts remain possible across watch 484.

   DISCUSSION...A line of storms has consolidated from southeast PA
   into central MD, moving east at around 30 kt which is close to the
   mean midlevel wind speeds as seen on the 00Z IAD sounding. Storms
   are also currently near the instability axis of 1500 J/kg MLCAPE,
   and thus should maintain intensity for an hour or two. While some
   eastward-advection of instability is expected due to westerly 850 mb
   winds, time of day will work against much destabilization across NJ
   and DE where MLCAPE is less than 1000 J/kg.

   ..Jewell.. 09/03/2020

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

   ATTN...WFO...PHI...AKQ...CTP...LWX...

   LAT...LON   38967742 39307705 39677672 39997663 40287649 40507557
               40337501 39847481 39137495 38777535 38587597 38557670
               38707728 38817738 38967742