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Mesoscale Discussion 579
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   MESOSCALE DISCUSSION 0579
   NWS STORM PREDICTION CENTER NORMAN OK
   0951 AM CDT MON MAY 12 2014

   AREAS AFFECTED...SE WI...NRN IL AND LAKE MI

   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 

   VALID 121451Z - 121615Z

   PROBABILITY OF WATCH ISSUANCE...60 PERCENT

   SUMMARY...A WIND DAMAGE THREAT IS EXPECTED TO DEVELOP LATE THIS
   MORNING ACROSS SERN WI AND NRN IL. THE THREAT SHOULD AFFECT THE
   MILWAUKEE AND CHICAGO AREAS IN A FEW HOURS. WW ISSUANCE MAY BE
   NEEDED ACROSS THE REGION OVER THE NEXT HALF HOUR.

   DISCUSSION...THE LATEST WSR-88D RADAR DATA SHOWS A SHORT LINE
   SEGMENT IN SWRN WI. A CORRIDOR OF MOISTURE IS LOCATED JUST AHEAD OF
   THE LINE EXTENDING NWD INTO SCNTRL WI WHERE SFC DEWPOINTS ARE IN THE
   MID 60S F AND MLCAPE IS ESTIMATED IN THE 100O TO 1500 J/KG RANGE.
   THE WSR-88D VWP AT MILWAUKEE SHOWS 45 KT OF 0-6 KM SHEAR WITH 30-40
   KT OF FLOW JUST ABOVE THE SFC. THIS SHOULD BE FAVORABLE FOR A SEVERE
   THREAT AS THE LINE MOVES ACROSS SRN WI AND FAR NRN IL LATE THIS
   MORNING. WIND DAMAGE AND HAIL WILL BE THE PRIMARY THREATS WITH THE
   ACTIVITY.

   ..BROYLES/MEAD.. 05/12/2014


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

   LAT...LON   41518987 41128936 41038864 41218774 41918712 42768691
               43438696 43848736 43978826 43958948 43498996 42868995
               42319003 41959000 41518987 

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Page last modified: May 12, 2014
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