Mesoscale Discussion 1056
   NWS Storm Prediction Center Norman OK
   0550 PM CDT Mon Jun 21 2021

   Areas affected...central and eastern New York  into northeast
   Pennsylvania and far northern New Jersey

   Concerning...Severe Thunderstorm Watch 300...303...

   Valid 212250Z - 212345Z

   The severe weather threat for Severe Thunderstorm Watch 300, 303
   continues.

   SUMMARY...A line of severe thunderstorms with a history of severe
   gusts and wind damage will likely continue to pose a risk for
   damaging gusts and perhaps a tornado or two this evening. Additional
   storm development/consolidation across southern New York and
   northeast Pennsylvania will pose a risk for damaging winds.

   DISCUSSION...Ahead of the cold front moving across western New York,
   a line of thunderstorms near Syracuse has produced a measured severe
   gust and numerous reports of wind damage over the last hour. Radar
   data shows a well developed comma head/bowing segment developing
   east of the KTYX radar. Damaging winds will be likely with this
   cluster of thunderstorms as they track to the east northeast over
   the next couple of hours. Regional VWP data also suggests some
   mesovortex tornado threat may evolve with 0-1km SRH around 100 ms/s2
   and 0-3km line normal shear around 30 kts. Some weakening of this
   portions of the line may occur closer to the border with Vermont as
   downstream convection has resulted in some airmass modification.
   Until then, a corridor of greater severe potential will likely
   evolve. 

   To the south across portions of northeastern Pennsylvania and
   southern New York, several clusters of developing thunderstorms were
   noted along a line from Binghamton to Allentown. Additional storm
   development should consolidate into a linear mode with the potential
   for increasing damaging wind threat as storms track through northern
   New Jersey and southern New York this evening.

   ..Lyons.. 06/21/2021

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

   ATTN...WFO...BTV...OKX...ALY...PHI...BGM...BUF...CTP...

   LAT...LON   43997550 44157421 44087345 43797318 43207336 41947350
               41117386 40787515 40837621 40937662 41397709 42367640
               42957612 43997550