Storm Prediction Center Mesoscale Discussion 1655

   Mesoscale Discussion 1655
   NWS Storm Prediction Center Norman OK
   0547 PM CDT Sat Jul 18 2026

   Areas affected...Parts of western PA and eastern/central OH

   Concerning...Severe Thunderstorm Watch 492...

   Valid 182247Z - 190045Z

   The severe weather threat for Severe Thunderstorm Watch 492
   continues.

   SUMMARY...The most favorable corridor for damaging wind gusts will
   extend from parts of western Pennsylvania into eastern and central
   Ohio for the next couple of hours -- within Severe Thunderstorm
   Watch 492.

   DISCUSSION...Loosely organized clusters of thunderstorms are
   tracking southeastward ahead of a cold front extending from western
   PA into eastern/central OH. The PBZ and CCX VWPs are sampling around
   45 kt of west-northwesterly 0-6 km shear oriented perpendicular to
   the gust fronts of these clusters. This favorable shear orientation
   and a narrow ENE-WSW-oriented corridor of warm/moist inflow will
   continue to support damaging wind gusts over the next couple of
   hours. Thereafter, storms will eventually move southeastward into an
   air mass that has been overturned by earlier convection
   (temperatures in the lower 70s in southwestern PA). This should
   result in a gradual decrease in storm intensity into this evening.

   ..Weinman.. 07/18/2026

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

   ATTN...WFO...CTP...PBZ...RLX...CLE...ILN...

   LAT...LON   40278283 40918053 41448018 41517969 41387850 41087824
               40747848 40217950 39638182 39688249 39828290 40058300
               40278283 

   MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH
   MOST PROBABLE PEAK WIND GUST...55-70 MPH
   MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN