MESOSCALE DISCUSSION 0184
   NWS STORM PREDICTION CENTER NORMAN OK
   0322 PM CST FRI MAR 04 2011
   
   AREAS AFFECTED...E CNTRL MO INTO W CNTRL IL
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 36...
   
   VALID 042122Z - 042245Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 36
   CONTINUES.
   
   THE REMAINDER OF THE NORTHERN ST. LOUIS METRO AREA...INCLUDING ST.
   LOUIS CITY...MAY NEED TO BE ADDED TO WW 36.  PARTS OF W CNTRL/CNTRL
   IL WILL NEED TO BE MONITORED FOR THE POSSIBILITY OF AN ADDITIONAL
   WW.
   
   A SMALL CONVECTIVE CLUSTER CONTINUES TO EVOLVE NEAR A WEAK FRONTAL
   WAVE OVER CENTRAL MISSOURI.  FORCING ASSOCIATED WITH LOWER/MID
   TROPOSPHERIC WARM ADVECTION APPEARS TO HAVE BEEN ENHANCED BY A 50 KT
   500 SPEED MAXIMUM...WHICH LATEST RUC GUIDANCE INDICATES WILL
   PROPAGATE EAST NORTHEASTWARD INTO CENTRAL ILLINOIS BY EARLY THIS
   EVENING.  AS THIS OCCURS...AND THE EVOLVING SQUALL LINE PROGRESSES
   EASTWARD WITHIN A NARROW CORRIDOR OF STRONGER BOUNDARY LAYER HEATING
   AND MODESTLY STEEP LOW-LEVEL LAPSE RATES...THE DOWNWARD TRANSFER OF
   HIGHER MOMENTUM AIR MAY YIELD INCREASING DAMAGING WIND POTENTIAL
   NEAR THE INTERSTATE 70 CORRIDOR EAST OF COLUMBIA INTO THE ST. LOUIS
   AREA BY 00-01Z.
   
   ..KERR.. 03/04/2011
   
   
   ATTN...WFO...ILX...LSX...SGF...
   
   LAT...LON   38299279 38909249 39279145 39859067 40159006 39848915
               38749004 38289089 37949196 37979268 38299279