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Mesoscale Discussion 737
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   MESOSCALE DISCUSSION 0737
   NWS STORM PREDICTION CENTER NORMAN OK
   0554 PM CDT WED MAY 04 2005
   
   AREAS AFFECTED...SRN FL
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 220...
   
   VALID 042254Z - 050000Z
   
   SWWD MOVING OUTFLOW BOUNDARY CONTINUES TO TRANSLATE THROUGH SRN
   FL...PASSING THROUGH SRN PARTS OF MIAMI-DADE COUNTY AND CNTRL
   PORTIONS OF INLAND MONROE COUNTY AT 2245Z.  SSWLY FLOW IN THE LOWEST
   PART OF THE TROPOSPHERE CONTINUES TO IMPINGE ON THIS
   BOUNDARY...EFFECTIVELY FORCING UNSTABLE PARCELS TO THEIR LFC AND
   RESULTING IN TSTM INITIATION.  STORMS QUICKLY MOVE NEWD ATOP THE
   COOLER BOUNDARY LAYER...REACH MATURITY...THEN DIMINISH AS THEY MOVE
   TOWARD THE METRO PALM BEACH/MIAMI AREAS.  LIFE CYCLES APPEAR TO BE
   LIMITED...BUT BEFORE THE STORMS WEAKEN...ISOLD LARGE HAIL AND GUSTY
   WINDS CAN BE EXPECTED. 
   
   WS 220 EXPIRES AT 00Z AND AN ADDITIONAL WW WILL NOT BE REQUIRED. 
   STORMS SHOULD CONTINUE TO WEAKEN AS THE BOUNDARY LAYER CONTINUES TO
   COOL AFTER SUNSET...OR AFTER THE COOL OUTFLOW MOVES ACROSS THE
   REMAINDER OF SRN FL.
   
   ..RACY.. 05/04/2005
   
   
   ATTN...WFO...MFL...MLB...EYW...TBW...
   
   24938165 26248217 26878101 27058024 27578017 27117972
   26307946 25437962 25218057 
   
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