Mesoscale Discussion 1827
   NWS Storm Prediction Center Norman OK
   0255 PM CDT Wed Aug 21 2019

   Areas affected...Hudson Valley into southern New England

   Concerning...Severe Thunderstorm Watch 609...

   Valid 211955Z - 212130Z

   The severe weather threat for Severe Thunderstorm Watch 609
   continues.

   SUMMARY...Thunderstorm activity will continue to develop and
   intensify across the region through 5-7 PM EDT, posing a risk for
   damaging wind gusts, and perhaps at least some continuing risk for a
   tornado or two.

   DISCUSSION...The initial convective band has largely dissipated, but
   widely scattered, generally discrete vigorous thunderstorms have
   developed and persisted.  This includes one storm which still could
   take on an increasing supercell structure as it tracks
   near/northwest of Providence RI during the next hour or so.  

   Convection north of Albany appears to be gradually growing upscale,
   with potential to produce a swath of damaging winds becoming more
   apparent.  Further intensification and organization appears
   possible, as it tracks eastward along an effective warm frontal zone
   near/north of the Massachusetts/Vermont and New Hampshire border
   area through 21-23Z.

   Additional new thunderstorm development is ongoing within surface
   troughing, near/east of the Catskills and Poconos.  In the presence
   of moderate instability and shear, this activity is expected to
   intensify further and gradually pose increasing potential for strong
   surface gusts across the lower Hudson Valley into southern New
   England and Long Island.

   ..Kerr.. 08/21/2019

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

   ATTN...WFO...GYX...BOX...BTV...OKX...ALY...PHI...BGM...

   LAT...LON   43587342 43537203 42807084 41917075 41387192 41027248
               40657350 40457445 40657537 41757469 43587342