Mesoscale Discussion 0960
   NWS Storm Prediction Center Norman OK
   0621 PM CDT Sun Jun 13 2021

   Areas affected...Pennsylvania

   Concerning...Severe Thunderstorm Watch 266...

   Valid 132321Z - 140045Z

   The severe weather threat for Severe Thunderstorm Watch 266
   continues.

   SUMMARY...Severe threat continues across mainly the western and
   central portions of ww266.

   DISCUSSION...Scattered robust convection has struggled to spread
   east of the higher terrain. This is likely partly due to much
   steeper lapse-rate environment extending across western NY, south
   into Clearfield County PA. Primary updraft feed is from this steeper
   lapse-rate plume and given the slow forward propagation, new
   updrafts may continue to develop in proximity to higher buoyancy.
   For these reasons, western and central portions of ww266 may remain
   most active.

   ..Darrow.. 06/13/2021

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

   ATTN...WFO...PHI...BGM...BUF...CTP...PBZ...

   LAT...LON   41907896 42157562 40547562 40327896 41907896