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Mesoscale Discussion 1174
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   Mesoscale Discussion 1174
   NWS Storm Prediction Center Norman OK
   0529 PM CDT Wed Jun 28 2017

   Areas affected...Southeast NE...IA...Northern MO

   Concerning...Tornado Watch 375...

   Valid 282229Z - 290000Z

   The severe weather threat for Tornado Watch 375 continues.

   SUMMARY...Severe threat continues across WW375.

   DISCUSSION...An elongated corridor of severe thunderstorms has
   evolved within the base of a strong short-wave trough over the Upper
   MS Valley. Numerous supercells are noted from extreme southeast NE,
   through central IA into southwest WI, though storm mergers are
   beginning to take place which may lead to an MCS-like cluster if
   trends continue. Shear profiles remain favorable for storm rotation
   and potential tornadoes along with very large hail. With time
   convection should spread across the remainder of WW375 focusing
   along the IA/MO border and IA/IL border later this evening.

   ..Darrow.. 06/28/2017

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

   ATTN...WFO...MKX...DVN...ARX...DMX...EAX...OAX...

   LAT...LON   40169646 42949391 42948977 40179248 40169646 

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