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Mesoscale Discussion 1745
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   MESOSCALE DISCUSSION 1745
   NWS STORM PREDICTION CENTER NORMAN OK
   0523 PM CDT SAT SEP 20 2014

   AREAS AFFECTED...SOUTHERN MN...SWRN WI

   CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 

   VALID 202223Z - 202330Z

   PROBABILITY OF WATCH ISSUANCE...80 PERCENT

   SUMMARY...SEVERE TSTM WATCH WILL LIKELY BE ISSUED SOON TO ACCOUNT
   FOR FAST-MOVING CONVECTION THAT WILL SPREAD ACROSS SRN MN INTO SWRN
   WI.

   DISCUSSION...STRONGLY FORCED BAND OF CONVECTION HAS GRADUALLY
   ORGANIZED ACROSS MN...IMMEDIATELY AHEAD OF DIGGING MID-LEVEL
   VORT...ALONG A SURGING COLD FRONT. NUMEROUS MEASURED WIND GUSTS AOA
   40KT ARE OBSERVED ALONG THIS LINE WITH 49KT RECENTLY MEASURED AT
   KRWF.  THIS ACTIVITY IS SPREADING SEWD AT ROUGHLY 40-45KT AND WILL
   SOON EXIT WATCH.  ADDITIONALLY...A FEW PRE-FRONTAL SUPERCELLS HAVE
   EVOLVED OVER BLUE EARTH AND LE SUEUR COUNTIES IN SRN MN.  THESE MORE
   DISCRETE STRUCTURES SHOULD BE OVERTAKEN BY FRONTAL CONVECTION SOON. 
   DAMAGING WINDS ARE THE PRIMARY THREAT...THOUGH LARGE HAIL IS
   EXPECTED WITH AFOREMENTIONED SUPERCELLS.

   ..DARROW/CORFIDI.. 09/20/2014


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

   LAT...LON   43989484 45079352 44349056 43099068 43029192 43989484 

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Page last modified: September 20, 2014
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