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Mesoscale Discussion 1354
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   Mesoscale Discussion 1354
   NWS Storm Prediction Center Norman OK
   0511 PM CDT Wed Jul 19 2017

   Areas affected...Northeast IA...Southern WI...Northern IL

   Concerning...Severe potential...Watch needed soon 

   Valid 192211Z - 192245Z

   Probability of Watch Issuance...95 percent

   SUMMARY...Severe threat is increasing across northeast IA, southern
   WI, and northern IL. Damaging winds are likely with thunderstorms
   this evening. WW will be issued soon to address this threat.

   DISCUSSION...Long-lived MCS is beginning to turn a bit more
   southeast as it progresses across southeast MN and northern IA.
   Southern-most flank of this activity is surging southeast at roughly
   50kt and will should track across the remainder of WW421, exiting
   the watch shortly after 23z. Damaging winds are expected along the
   leading edge of the squall line. WW will be issued soon to reflect
   this scenario.

   ..Darrow/Guyer.. 07/19/2017

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

   ATTN...WFO...LOT...ILX...MKX...DVN...ARX...DMX...

   LAT...LON   43908987 42548823 41068945 42449216 43908987 

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Page last modified: July 19, 2017
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