Mesoscale Discussion 1318
   NWS Storm Prediction Center Norman OK
   0601 PM CDT Wed Jul 22 2020

   Areas affected...Southern New England...Southeast New York...New
   Jersey...Southeast Pennsylvania

   Concerning...Severe Thunderstorm Watch 394...

   Valid 222301Z - 230100Z

   The severe weather threat for Severe Thunderstorm Watch 394
   continues.

   SUMMARY...A wind damage threat will likely continue as a strong to
   severe convective line moves eastward to the coast of New Jersey. A
   severe threat may also continue across parts of southern New England
   and could affect areas to the east of WW 394.

   DISCUSSION...The latest mosaic radar imagery shows a convective line
   from western New Jersey south-southwestward into the Delaware
   Valley. The RAP shows moderate instability ahead of the line to near
   the Atlantic coast. This should help maintain a wind damage threat
   as the line moves offshore over the next couple of hours. Further to
   the north into southern New England, scattered strong to severe
   thunderstorms are ongoing. This activity is located on the northern
   end of a corridor of moderate instability where MLCAPE is estimated
   in the 1000 to 1500 J/kg range. The WSR-88D VWPs at New York City
   and Boston show 0-6 km shear approaching 30 kt. Substantial
   directional shear is located in the boundary layer with speed shear
   mostly in the mid-levels. This should be sufficient for storm
   organization and wind damage will be a threat with the stronger
   multicells. The severe threat could impact areas in southern New
   England just to the east of WW 394. The threat should become more
   isolated as it moves eastward into a more stable airmass across
   eastern Massachusetts and Rhode Island.

   ..Broyles.. 07/22/2020

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

   ATTN...WFO...GYX...BOX...OKX...ALY...PHI...BGM...AKQ...CTP...
   LWX...

   LAT...LON   41267465 40747499 39977615 39337646 38837658 38317648
               38167619 38047573 38057541 38227508 38897441 39237417
               40237365 40817290 41307203 41747169 42277161 42597174
               42917211 43077258 43127323 42517384 41267465