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Mesoscale Discussion 379
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   Mesoscale Discussion 0379
   NWS Storm Prediction Center Norman OK
   0546 AM CDT Mon Apr 13 2020

   Areas affected...Eastern North Carolina into southeastern Virginia
   and portions of the southern Delmarva Peninsula

   Concerning...Tornado Watch 118...

   Valid 131046Z - 131215Z

   The severe weather threat for Tornado Watch 118 continues.

   SUMMARY...An evolving squall line is expected to overspread the
   region through 9-11 AM EDT accompanied by the risk for tornadoes
   and/or potentially very damaging wind gusts.

   DISCUSSION...The squall line is gradually intensifyng along the
   deepening pre-frontal surface trough axis, which is forecast to
   continue shifting across the North Carolina/Virginia piedmont, into
   the coastal plain through 13-15Z.  The latest Rapid Refresh suggests
   that further strengthening of the associated southerly 850 mb jet
   core in excess of 70 kts is possible, and extreme low-level shear
   may coincide with increasing boundary-layer destabilization
   associated with continued low-level moisture advection and at least
   some daytime heating.  This environment probably will continue to
   support intensifying mesoscale cyclonic circulations within the
   squall line, accompanied by a risk for tornadoes and/or locally
   potentially very damaging wind gusts.

   ..Kerr.. 04/13/2020

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

   ATTN...WFO...AKQ...MHX...LWX...RAH...ILM...

   LAT...LON   38167645 38107561 37167596 35857631 34107782 34277890
               34877953 37347804 38167645 

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Page last modified: April 13, 2020
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