MESOSCALE DISCUSSION 0948
   NWS STORM PREDICTION CENTER NORMAN OK
   0458 AM CDT WED MAY 25 2011
   
   AREAS AFFECTED...SOUTHERN/EASTERN MO TO WESTERN/CENTRAL IL
   
   CONCERNING...TORNADO WATCH 366...
   
   VALID 250958Z - 251130Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 366 CONTINUES.
   
   TORNADO WATCH 366 CONTINUES UNTIL 13Z. DAMAGING WINDS WILL REMAIN
   THE PRIMARY CONCERN...WITH ISOLATED TORNADOES/SEVERE HAIL POSSIBLE
   AS WELL. AN ADDITIONAL WATCH MAY BE NEEDED EARLY THIS MORNING
   ESPECIALLY FOR PORTIONS OF CENTRAL IL.
   
   THE GREATEST SEVERE THREAT THROUGH THE EARLY MORNING IS LIKELY TO BE
   FOCUSED IN A SOUTHWEST-NORTHEAST ORIENTED CORRIDOR FROM SOUTHEAST MO
   /IN THE ST LOUIS METRO/ INTO SOUTHWEST/CENTRAL IL INCLUDING AREAS
   ALONG I-70/I-64. POTENTIALLY AIDED BY A PIVOTING LOBE OF FOCUSED
   ASCENT/DPVA...A RELATIVE MAXIMA OF SURFACE PRESSURE FALLS ARE NOTED
   WITHIN THE AFOREMENTIONED CORRIDOR AS A RELATIVELY WARM/MOIST
   AIRMASS IS IN PLACE WITH SURFACE TEMPERATURES IN THE LOWER/MIDDLE
   70S AND MIDDLE/UPPER 60S F SURFACE DEWPOINTS. WITH 50+ KT
   SOUTH-SOUTHWESTERLY WINDS NOW NOTED IN THE ST LOUIS WSR-88D VWP
   WITHIN THE LOWEST 1-3 KM...SCENARIO WILL REMAIN CONDUCIVE FOR FAST
   NORTHEASTWARD MOVING QLCS SEGMENTS/EMBEDDED BOWS WITH A DAMAGING
   WIND/ISOLATED TORNADO POTENTIAL.
   
   ..GUYER.. 05/25/2011
   
   
   ATTN...WFO...IND...PAH...LOT...ILX...LSX...DVN...SGF...
   
   LAT...LON   36999151 37439198 38759100 40439080 41088872 40828783
               40318750 38488805 36999151