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Mesoscale Discussion 685
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   Mesoscale Discussion 0685
   NWS Storm Prediction Center Norman OK
   0352 PM CDT Sat Jun 09 2018

   Areas affected...Far southern MN...Northeast IA

   Concerning...Tornado Watch 165...

   Valid 092052Z - 092215Z

   The severe weather threat for Tornado Watch 165 continues.

   SUMMARY...Threat for all severe hazards, including tornadoes,
   continues across far southern MN and northeast IA.

   DISCUSSION...Supercell thunderstorm moving from Winnebago into Worth
   and Cerro Gordo counties in northern IA has produced a couple of
   reported tornadoes over the past hour or so. Overall storm structure
   continues to suggest a well-organized storm capable of all severe
   hazards. This storm's proximity to the effective triple point also
   suggests continued lift and favorable low-level inflow to the storm.
   Additional thunderstorm development has occurred farther southwest
   on the effective cold front and appears to be undergoing a storm
   split. Close proximity of this storm to the ongoing supercell casts
   some doubt to its longevity but the overall airmass is supportive of
   storm strengthening. Upscale growth into a linear convective system
   is anticipated later this evening.

   ..Mosier/Grams.. 06/09/2018

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

   ATTN...WFO...DVN...ARX...MPX...DMX...

   LAT...LON   44089454 44289387 44199175 42829062 41929062 41809313
               42839418 44089454 

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Page last modified: June 09, 2018
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