Mesoscale Discussion 1615
   NWS Storm Prediction Center Norman OK
   0250 PM CDT Fri Aug 28 2020

   Areas affected...southeast PA...southern NJ...northern
   DE...northeast MD

   Concerning...Severe Thunderstorm Watch 464...

   Valid 281950Z - 282115Z

   The severe weather threat for Severe Thunderstorm Watch 464
   continues.

   SUMMARY...A swath of strong to severe gusts (50-65 mph) will move
   across southeast PA during the next few hours before reaching the
   coast.

   DISCUSSION...Radar mosaic shows a mature squall line over southeast
   PA extending southwest to near the MD/PA border northwest of
   Baltimore.  The airmass ahead of the storms is characterized as
   moderately unstable with mid 80s to 90 deg F surface temperatures
   and dewpoints in the lower 70s.  The Reading, PA (KRDG) ASOS
   recently measured a 50-kt gust at 329pm EDT with passage of the
   squall line.  The squall line will likely move into the greater
   Philadelphia vicinity during the next 1-2 hours.  The strongest
   gusts will probably occur with embedded inflections/bows in the
   squall line or with the deeper convective cores.

   ..Smith.. 08/28/2020

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

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

   LAT...LON   39937635 40397512 40127478 39547507 39127560 39317651
               39507689 39937635