Mesoscale Discussion 0905
   NWS Storm Prediction Center Norman OK
   0803 PM CDT Wed Jun 10 2020

   Areas affected...The lower Great Lakes/upper Ohio Valley/Allegheny
   Plateau vicinity

   Concerning...Severe Thunderstorm Watch 279...

   Valid 110103Z - 110200Z

   The severe weather threat for Severe Thunderstorm Watch 279
   continues.

   SUMMARY...Squall line progressing across the region may continue to
   pose a risk for damaging wind gusts another couple of hours, into
   10-11 PM EDT time frame, before tending to weaken.

   DISCUSSION...The pre-frontal squall line has filled in over the past
   couple of hours, with a number of embedded bow/lewp radar
   reflectivity structures.  Although activity has been generally
   maintaining strength, the boundary layer air mass ahead it is
   beginning to become less unstable with the onset of diurnal cooling.
    With the primary supporting short wave impulse tending to
   accelerate north-northeastward through lower Michigan, weakening
   trends could be fairly rapid as the convection begins to process
   more stable air.  However, until this occurs, stronger convection
   may continue to pose a risk for potentially damaging wind gusts, and
   this includes the portion of the line which could impact the Greater
   Pittsburgh metro area by around 02Z.

   ..Kerr.. 06/11/2020

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

   ATTN...WFO...BUF...CTP...PBZ...RLX...CLE...

   LAT...LON   42567996 41807901 39787987 38988071 38358225 38858171
               39228129 39978062 40908077 41758066 42567996