Mesoscale Discussion 0426
   NWS Storm Prediction Center Norman OK
   0229 PM CDT Tue Apr 21 2020

   Areas affected...Southeast New York through southern Connecticut

   Concerning...Severe Thunderstorm Watch 128...

   Valid 211929Z - 212100Z

   The severe weather threat for Severe Thunderstorm Watch 128
   continues.

   SUMMARY...Threat for damaging wind will persist over Long Island and
   possibly into southern Connecticut until around 21Z. Farther south
   along the Mid Atlantic coast, the inland severe threat is ending as
   the line moves offshore.

   DISCUSSION...Line of low-topped thunderstorms extends from
   southwestern CT, into western Long Island and southward along the
   Middle Atlantic coast. The line is moving east at 40-45 kt and will
   move across southern CT and Long Island during the next 1.5 hours.
   Occasional bowing segments continue to be observed. Compared to
   farther south, the surface layer has not destabilized much with
   temperatures remaining only in the upper 40s to around 50F. However,
   this stable layer is relatively shallow, and with 40+ kt observed
   between 0.5 and 1.5 km on the Upton VWP, potential remains for some
   of this momentum to be transported to the surface along portions of
   the narrow convective line.

   ..Dial.. 04/21/2020

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

   ATTN...WFO...BOX...OKX...

   LAT...LON   41147165 40707283 40767333 41407291 41507182 41147165