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Mesoscale Discussion 785
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   Mesoscale Discussion 0785
   NWS Storm Prediction Center Norman OK
   0450 PM CDT Fri May 19 2017

   Areas affected...Portions of southern/central OH...northern
   KY/WV...and southwestern PA

   Concerning...Severe Thunderstorm Watch 247...

   Valid 192150Z - 192245Z

   The severe weather threat for Severe Thunderstorm Watch 247
   continues.

   SUMMARY...Mainly an isolated strong to locally damaging wind threat
   continues across Severe Thunderstorm Watch 247.

   DISCUSSION...A few sub-severe wind gusts have been noted over the
   past hour or so with a loosely organized cluster of thunderstorms
   moving eastward across southern OH and northern KY. Although
   temperatures have generally warmed into the 80s this afternoon ahead
   of this activity, poor mid-level lapse rates noted on the 18Z ILN
   sounding have limited MLCAPE to 500-1000 J/kg to the south of a
   stalled frontal boundary across central OH. Generally unidirectional
   westerly low to mid-level flow strengthens modestly with height, and
   30-35 kt of effective bulk shear will continue to support some storm
   organization, with mainly isolated strong to locally damaging winds
   remaining the main threat though the early evening. The loss of
   diurnal heating should reduce instability and the overall severe
   threat later this evening.

   ..Gleason.. 05/19/2017

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

   ATTN...WFO...PBZ...RLX...ILN...

   LAT...LON   38768464 38968447 39248368 40158270 40398067 40117967
               39477967 38568116 38608467 38768464 

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Page last modified: May 19, 2017
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