MESOSCALE DISCUSSION 0753
   NWS STORM PREDICTION CENTER NORMAN OK
   1146 PM CDT THU MAY 07 2009
   
   AREAS AFFECTED...SOUTHERN/EASTERN MO AND SOUTHERN/EASTERN IL INTO
   WESTERN KY/SOUTHWEST INDIANA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 260...262...
   
   VALID 080446Z - 080615Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
   260...262...CONTINUES.
   
   SEVERE TSTM WATCHES 260/262 CONTINUE UNTIL 07Z AND 11Z
   RESPECTIVELY...WITH PRIMARY RISKS OF SEVERE HAIL AND DAMAGING WINDS.
   
   LOW AMPLITUDE MID LEVEL SPEED MAXIMA AND EASTERLY BRANCH OF LOW
   LEVEL JET/INSTABILITY FEED ACROSS MO /30-40 KT SWLY PER REGIONAL
   PROFILERS AND WSR-88D VWPS/...ALONG WITH MESOSCALE STORM
   CONSOLIDATION/ORGANIZATION...WITH CONTINUE TO SUPPORT A MAINLY
   SEVERE HAIL/DAMAGING WIND THREAT OVERNIGHT. WITH TWO
   LONG-LIVED/SOUTHEAST MOVING SUPERCELLS HAVING MERGED ACROSS CENTRAL
   MO...THE MOST FOCUSED/CONSEQUENTIAL SEVERE THREAT SHOULD CONTINUE TO
   DEVELOP SOUTHEASTWARD ACROSS SOUTH CENTRAL/SOUTHEAST MO AND ADJACENT
   FAR SOUTHERN IL/FAR WESTERN KY OVERNIGHT ALONG THE EXISTING
   MOISTURE/INSTABILITY GRADIENT. ALONG WITH SEVERE HAIL...FURTHER
   SHORT TERM UPSCALE QUASI-LINEAR GROWTH IS ANTICIPATED WITHIN THIS
   CORRIDOR...WITH AN INCREASING RISK FOR DAMAGING WINDS. A 55 KT GUST
   WAS RECENTLY MEASURED IN COLUMBIA MO /0402Z/...WITH A 54 KT AT
   JEFFERSON CITY MO /0431Z/. FARTHER EAST...THE SEVERE RISK SHOULD
   REMAIN A BIT MORE ISOLATED ACROSS SOUTHEAST IL/SOUTHWEST INDIANA AND
   MUCH OF WESTERN KY...BUT AMPLE ELEVATED INSTABILITY/SHEAR WILL
   CONTINUE A SEVERE HAIL/PERHAPS DAMAGING WIND THREAT NONETHELESS.
   
   ..GUYER.. 05/08/2009
   
   
   ATTN...WFO...LMK...IND...PAH...ILX...LSX...SGF...EAX...
   
   LAT...LON   39038918 39938802 39118687 36738733 37009166 38729326
               38849075 39038918