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Mesoscale Discussion 1306
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MD 1306 graphic

   Mesoscale Discussion 1306
   NWS Storm Prediction Center Norman OK
   0343 PM CDT Thu Jul 13 2017

   Areas affected...Eastern Pennsylvania...much of New
   Jersey...southern New York...and Connecticut

   Concerning...Severe Thunderstorm Watch 412...413...

   Valid 132043Z - 132145Z

   The severe weather threat for Severe Thunderstorm Watch 412, 413
   continues.

   SUMMARY...The severe threat continues across portions of WWs 412 and
   413.

   DISCUSSION...Scattered storms have evolved into a couple of linear
   segments over the past hour or so over northwestern portions of the
   discussion area at this time, extending from far western Connecticut
   (around 30 SW BDL southwestward to around 30 S POU) and in eastern
   Pennsylvania (from around 15 NW ABE westward to around 25 N CXY). 
   More isolated convection has evolved out ahead of these linear
   segments recently.  A threat for damaging wind gusts/tree damage
   remains possible with each of the individual storms and linear
   segments - especially where a moderately unstable airmass exists
   that has been undisturbed by previous convection.

   Northwest of the linear segments, overturning and low-level
   stabilization has led to a substantial decrease in the severe threat
   for the remainder of the afternoon.  Most recent status messages for
   WWs 412 and 413 indicate areas where the threat has decreased
   recently, and northwestern portions of these watches may be
   cancelled early.

   ..Cook.. 07/13/2017

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

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

   LAT...LON   40667710 40887621 41237511 41687408 41947313 41957222
               41747173 41247163 40867191 40487303 40087376 39747457
               39707554 39837676 39907731 40047748 40357744 40667710 

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Page last modified: July 13, 2017
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