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Mesoscale Discussion 1117
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   MESOSCALE DISCUSSION 1117
   NWS STORM PREDICTION CENTER NORMAN OK
   0914 AM CDT MON JUN 22 2015

   AREAS AFFECTED...SOUTHERN WI/NORTHERN IL/NORTHWEST INDIANA

   CONCERNING...SEVERE POTENTIAL...WATCH NEEDED SOON 

   VALID 221414Z - 221515Z

   PROBABILITY OF WATCH ISSUANCE...95 PERCENT

   SUMMARY...A SEVERE MCS WILL LIKELY CONTINUE EAST-SOUTHEASTWARD FROM
   SOUTHWEST WI AND NORTHEAST/EAST-CENTRAL IA INTO ADDITIONAL PORTIONS
   OF SOUTHERN WI/NORTHERN IL/NORTHWEST INDIANA...WITH A
   CORRIDOR/POSSIBLE SWATH OF DAMAGING WINDS REMAINING LIKELY.

   DISCUSSION...A HIGHLY ORGANIZED QUASI-LINEAR MCS WITH EARLY MORNING
   HISTORY OF SEVERE WIND GUSTS /AND EVEN WAKE LOW-RELATED GUSTS/
   CONTINUES TO STEADILY SPREAD EAST-SOUTHEASTWARD ACROSS SOUTHWEST WI
   AND NORTHEAST/EAST-CENTRAL IA AS OF 14Z. WHILE CLOUD COVER PRECEDES
   THE MCS ACROSS NORTHERN IL/SOUTHERN WI...MODEST WARMING/MOISTENING
   CONTINUES TO OCCUR IN TANDEM WITH A WARM FRONT THAT EXTENDS
   EAST-SOUTHEASTWARD AHEAD OF THE MCS. THIS ENVIRONMENTAL
   SCENARIO...ALONG WITH THE HIGHLY ORGANIZED/FAST-MOVING NATURE OF THE
   MCS...SUGGESTS THAT THE POTENTIAL FOR POTENTIALLY WIDESPREAD
   DAMAGING WINDS WILL CONTINUE TO QUICKLY SPREAD EAST-SOUTHEASTWARD
   ACROSS MUCH OF NORTHERN IL/SOUTHERN WI/NORTHWEST INDIANA.

   ..GUYER/GOSS.. 06/22/2015


   ATTN...WFO...IWX...LOT...MKX...DVN...

   LAT...LON   43568918 43538797 42718653 41448638 40828736 41479041
               42068961 42578924 43568918 

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Page last modified: June 22, 2015
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