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Mesoscale Discussion 908
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   Mesoscale Discussion 0908
   NWS Storm Prediction Center Norman OK
   0639 PM CDT Sun May 28 2017

   Areas affected...Central IN...Northern OH...Northwest PA...Western

   Concerning...Severe Thunderstorm Watch 292...

   Valid 282339Z - 290115Z

   The severe weather threat for Severe Thunderstorm Watch 292

   SUMMARY...Isolated severe threat continues in and near WW 292, but a
   downward trend is expected with time and it appears that the watch
   can expire at 00Z.

   DISCUSSION...At 2330Z, strong to potentially severe thunderstorms
   are scattered from central IN northeastward into northwest PA and
   western NY. At this time, the greatest short-term threat should be
   associated with small line segments across central/northern IN,
   northwest OH, and northeast OH, and also with more isolated cells
   over western NY that have a history of producing hail. Convection
   will likely persist well into the evening in advance of a strong
   midlevel low over the northern Great Lakes, but diminishing
   surface-based instability and generally marginal effective shear
   should result in a diminishing trend with time. 

   Unless there is a short-term uptick in storm intensity, WW 292 can
   probably expire at the scheduled time of 00Z, though a marginal risk
   of marginal hail and isolated damaging wind may persist for a couple
   more hours.

   ..Dean.. 05/28/2017

   ...Please see for graphic product...


   LAT...LON   40618658 41088470 41858164 42777908 42337827 41277932
               41048038 40588212 40388338 40218442 39788526 39318604
               39668662 40618658 

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