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Mesoscale Discussion 872
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   MESOSCALE DISCUSSION 0872
   NWS STORM PREDICTION CENTER NORMAN OK
   0850 PM CDT SAT MAY 10 2008
   
   AREAS AFFECTED...ECNTRL/SERN MO...FAR W KY...SWRN IL
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 301...
   
   VALID 110150Z - 110315Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 301
   CONTINUES.
   
   UPR TROUGH AXIS AND ASSOCD COOLING ALOFT CONTINUE TO SWING EWD INTO
   THE MID-MS VLY THIS EVENING.  NUMEROUS TSTMS CONTINUE TO THRIVE IN A
   STRONG WARM ADVECTION PROFILE AHEAD OF THIS SYSTEM.  VWP FROM ST.
   LOUIS EXHIBITED ABOUT 50 KTS OF EFFECTIVE VERTICAL SHEAR...
   SUPPORTIVE OF SUPERCELL STORMS.  MID-LEVEL LAPSE RATES WILL CONTINUE
   TO IMPROVE THROUGH THE EVENING AND SUSTAINED STORMS WILL LIKELY GIVE
   LARGE HAIL.  ACTIVITY SHOULD REMAIN SLIGHTLY ELEVATED...BUT
   SUFFICIENT UNCERTAINTY EXISTS ON THE LOWER LEVEL OF EFFECTIVE
   PARCELS FEEDING STORMS THAT AN ISOLD TORNADO CANNOT BE RULED
   OUT...ESPECIALLY ACROSS SERN MO INTO SWRN IL/FAR W KY.
   
   ..RACY.. 05/11/2008
   
   
   ATTN...WFO...PAH...LSX...
   
   36679042 38689179 38698994 37068864 36738893 
   
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