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Storm Prediction Center Mesoscale Discussion 1496

2024-06-30 17:44:05

Mesoscale Discussion 1496
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   Mesoscale Discussion 1496
   NWS Storm Prediction Center Norman OK
   0441 PM CDT Sun Jun 30 2024

   Areas affected...portions of southeast Pennsylvania and New Jersey

   Concerning...Severe Thunderstorm Watch 489...

   Valid 302141Z - 302315Z

   The severe weather threat for Severe Thunderstorm Watch 489

   SUMMARY...The severe threat continues across Severe Thunderstorm
   Watch 489. Strong to locally severe wind gusts (50-65 mph) remain
   the primary threat, though a couple instances of hail also cannot be
   ruled out. The severe threat should gradually diminish as storms
   move offshore.

   DISCUSSION...Multiple organized thunderstorm clusters and short line
   segments continue eastward across portions of the Mid Atlantic. Some
   of the storms have a history of strong to severe wind gusts, and a
   61 mph wind gust was recently measured in Camden County, NJ. These
   storms are benefiting from an adequately unstable and sheared
   airmass (i.e. 2000-3000 J/kg MLCAPE with 40-50 kts of effective bulk
   shear). Regional VADs show that mainly speed shear is present via
   elongated but nearly straight hodographs. As such, strong to severe
   multicells and short line segments should continue eastward with a
   strong gust/hail threat for at least a few more hours. Later this
   evening, the severe threat should wane when storms move offshore
   into the Atlantic.

   ..Squitieri.. 06/30/2024

   ...Please see for graphic product...


   LAT...LON   39927667 40737523 40787423 40687356 40447336 40087339
               39787437 39727547 39927667 

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