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Mesoscale Discussion 1259
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   Mesoscale Discussion 1259
   NWS Storm Prediction Center Norman OK
   0254 PM CDT Fri Jul 07 2017

   Areas affected...Southeast IN...Southwest IN...North-central KY

   Concerning...Severe Thunderstorm Watch 401...403...

   Valid 071954Z - 072130Z

   The severe weather threat for Severe Thunderstorm Watch 401, 403
   continues.

   SUMMARY...Line of storms moving through central IN is expected to
   continue southeastward for at least the next few hours. Continued
   threat for damaging wind gusts and isolated hail will necessitate
   the issuance of a downstream watch.

   DISCUSSION...Complicated surface pattern exists across the region
   with multiple boundaries interacting with the ongoing convective
   complexes. Outflow boundary associated with the convective line
   moving across southeast OH extends back northwestward through
   southwest OH and into central IN where it intersects a pre-frontal
   trough ahead of the approaching cold front. The intersection is near
   OKK, where several ongoing storms have recently strengthened, likely
   as a result of storm mergers. 

   Overall expectation is for the ongoing complex to continue
   southeastward along and south of the outflow boundary into southeast
   IN, southeast OH, and portions of north-central KY. Damaging wind
   gusts and isolated hail are possible as these storms continue
   southeastward and a watch will likely be needed across portions of
   the region. Some of this area (i.e. southwest OH) is in Watch 401,
   which is schedule to expire at 21Z, so the new watch will be issued
   to effectively replace portions of Watch 401.

   ..Mosier/Grams.. 07/07/2017

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

   ATTN...WFO...RLX...JKL...ILN...LMK...IND...

   LAT...LON   37698513 38278620 38988670 39898596 40058421 39208297
               38318288 37778361 37698513 

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Page last modified: July 07, 2017
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