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Mesoscale Discussion 1505
MD 1505 graphic
   
   MESOSCALE DISCUSSION 1505
   NWS STORM PREDICTION CENTER NORMAN OK
   1150 AM CDT WED JUN 25 2003
   
   AREAS AFFECTED...ERN IA...SRN WI
   
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL 
   
   VALID 251650Z - 251845Z
   
   WW WILL LIKELY BE ISSUED SHORTLY.
   
   CONVECTION HAS RE-INTENSIFIED ALONG OUTFLOW BOUNDARY NOW SOUTHEAST
   OF LA CROSSE WI AND DES MOINES IOWA...SUPPORTED BY LIFT OF
   SURFACE-BASED AIR MASS WHICH HAS BECOME MODERATELY UNSTABLE WITH
   DAYTIME HEATING.  LATEST OBJECTIVE GUIDANCE SUGGEST NARROW CORRIDOR
   OF MEAN MIXED LAYER CAPE OF 1500 TO 2000 J/KG AHEAD OF ACTIVITY...
   WHICH MAY SUPPORT FURTHER INTENSIFICATION...THOUGH VEERED FLOW AHEAD
   OF LINE IS MINIMIZING LOW-LEVEL CONVERGENCE.  DOWNWARD TRANSFER OF
   MOMENTUM ASSOCIATED WITH 20 TO 30 KT SOUTH SOUTHWESTERLY LOW-LEVEL
   JET MAY CONTINUE TO ENHANCE POTENTIAL FOR DAMAGING WIND GUSTS AS
   CONVECTIVE SYSTEM GRADUALLY SPREADS ACROSS THE MISSISSIPPI RIVER
   INTO SOUTHERN WISCONSIN/NORTHERN ILLINOIS BY 20/21Z.
   
   ..KERR.. 06/25/2003
   
   
   ATTN...WFO...GRB...LOT...ILX...MKX...DVN...ARX...DMX...
   
   42459172 43129050 43658967 43998884 43478808 42978792
   42338814 41588946 40669097 40599162 40759294 41199315
   41609234 
   
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