Mesoscale Discussion 1670
   NWS Storm Prediction Center Norman OK
   0250 PM CDT Wed Jul 17 2024

   Areas affected...Eastern PA/northern NJ into western New England

   Concerning...Severe Thunderstorm Watch 552...

   Valid 171950Z - 172145Z

   The severe weather threat for Severe Thunderstorm Watch 552
   continues.

   SUMMARY...The threat for primarily damaging straight-line winds
   continues for WW 552.

   DISCUSSION...Ongoing thunderstorms across the watch area have begun
   to loosely cluster into linear segments, and could potentially see
   further organization given modest buoyancy and deep-layer vertical
   shear of 40-45 kts. The greatest threat for damaging winds will be
   with any mature, isolated updrafts that take on supercellular
   characteristics, as well as any locally enhanced bowing segments
   from merging/constructively interfering thunderstorm outflows. Steep
   low-level lapse rates and relatively dry boundary layers/high MLLCL
   heights will continue to support the downward mixing of thunderstorm
   outflow winds. 

   The latest short-term guidance indicates that additional convective
   development in the southwest portion of the watch area, primarily
   Eastern PA into northern NJ, is likely around 22-02Z. The primary
   threat with these storms will be damaging thunderstorm wind gusts.

   ..Halbert/Squitieri.. 07/17/2024

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

   ATTN...WFO...GYX...BOX...BTV...OKX...ALY...PHI...BGM...CTP...

   LAT...LON   39737478 39807539 39807621 39787672 39817727 39847747
               40347717 40907689 41317654 41707616 41937593 42187547
               42397484 42807406 42917377 43007350 43297226 43177171
               42747153 42347166 41707230 40917310 40167389 39797423
               39737478