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Mesoscale Discussion 1324
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   Mesoscale Discussion 1324
   NWS Storm Prediction Center Norman OK
   0139 PM CDT Wed Jul 21 2021

   Areas affected...Parts of eastern Maryland...Delaware...southeastern
   Pennsylvania...southern New Jersey...Rhode Island...southeastern
   Massachusetts

   Concerning...Severe Thunderstorm Watch 385...

   Valid 211839Z - 212045Z

   The severe weather threat for Severe Thunderstorm Watch 385
   continues.

   SUMMARY...Strong thunderstorm development may still impact parts of
   southeastern New England, southern New Jersey and the Delmarva
   Peninsula, posing a risk for marginally severe hail and locally
   damaging wind gusts through 4-6 PM EDT, while becoming more isolated
   in nature elsewhere.

   DISCUSSION...The eastward progression of the mid-level trough, slow
   southeastward advancement of the cold front and influence of
   convective outflow associated with early thunderstorm development
   have increasingly confined stronger boundary-layer instability to
   the Delmarva Peninsula, southern New Jersey and portions of
   southeastern New England.  This is generally focused south of the
   the cold front into  pre-frontal surface troughing, where stronger
   thunderstorm development is expected to continue to increase and
   tend to consolidate through 4-6 PM EDT.  

   Beneath cool mid-level temperatures, residual moisture may maintain
   sufficient instability to support a continuing risk for additional
   thunderstorm development across the remainder of the watch area to
   the west and north, but this probably will be much more isolated in
   nature.

   ..Kerr.. 07/21/2021

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

   ATTN...WFO...BOX...OKX...PHI...AKQ...CTP...LWX...

   LAT...LON   39317638 39847607 40297525 40367428 40517320 40757202
               41277154 41647208 42337058 41776958 40707023 39677034
               38847134 37927433 37477525 37187586 38497670 39317638 

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