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Mesoscale Discussion 1111
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   MESOSCALE DISCUSSION 1111
   NWS STORM PREDICTION CENTER NORMAN OK
   1125 PM CDT SUN JUN 21 2015

   AREAS AFFECTED...DAKOTAS...WCNTRL MN

   CONCERNING...SEVERE THUNDERSTORM WATCH 327...

   VALID 220425Z - 220600Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 327
   CONTINUES.

   SUMMARY...LARGE HAIL AND DAMAGING WINDS ARE POSSIBLE WITH CONVECTION
   ACROSS WW327 TONIGHT.

   DISCUSSION...UPWARD EVOLVING MCS IS PROGRESSING STEADILY ACROSS ERN
   ND AIDED IN PART BY DEEPENING/STRENGTHENING MID-LEVEL FLOW AHEAD OF
   SHORT-WAVE TROUGH.  STRONGEST SURGE WITHIN THE MCS IS ALONG THE SRN
   FLANK WHERE AN ARC-SHAPED LINE IS PROPAGATING SEWD AT ROUGHLY 40KT
   INTO MCPHERSON COUNTY SD.  DAMAGING WINDS APPEAR LIKELY ALONG
   LEADING EDGE OF THIS SURGE.  FARTHER NORTH...AN MCV APPEARS TO BE
   FORMING NEAR LAMOURE COUNTY ND AND FURTHER EXPANSION OF THIS COMPLEX
   OF STORMS IS POSSIBLE AS IT MOVES TOWARD WCNTRL MN BY 07Z.

   UPSTREAM...A SW-NE BAND OF TSTMS IS ORGANIZING ALONG WIND SHIFT FROM
   SWRN ND INTO EXTREME NERN WY.  THIS ACTIVITY SHOULD PROGRESS EWD
   ACROSS SRN PORTIONS OF WW327 WITH A THREAT FOR LARGE HAIL AND
   DAMAGING WINDS.

   ..DARROW.. 06/22/2015


   ATTN...WFO...MPX...FGF...ABR...BIS...UNR...BYZ...GGW...

   LAT...LON   44720410 46750409 47109544 45089542 44720410 

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Page last modified: June 22, 2015
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