MESOSCALE DISCUSSION 0315
   NWS STORM PREDICTION CENTER NORMAN OK
   0613 AM CDT THU MAR 22 2007
   
   AREAS AFFECTED...PARTS OF CENTRAL/ERN MO INTO CENTRAL IL
   
   CONCERNING...TORNADO WATCH 66...
   
   VALID 221113Z - 221215Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 66 CONTINUES.
   
   AT 11Z...REGIONAL RADARS INDICATED THE STRONGEST ACTIVITY ACROSS
   CENTRAL MO WAS LOCATED FROM ST. CLAIR TO MILLER COUNTIES...WHILE
   STRONG TO SEVERE ACTIVITY WAS ALSO LOCATED IN THE SERN PART OF WW 66
   OVER SWRN-CENTRAL PARTS OF IL.  THE PORTION OF THE LLJ LOCATED OVER
   ERN KS INTO MO HAS VEERED TO WSWLY SINCE 08Z...AS THE PROGRESSIVE
   NRN STREAM SHORT WAVE TROUGH TRACKS EWD THROUGH THE WRN GREAT LAKES
   REGION.  MOISTURE/WARM AIR ADVECTION ALONG LLJ AND BENEATH PLUME OF
   STEEP MID LEVEL LAPSE RATES WILL MAINTAIN AXIS OF MODERATE
   INSTABILITY ACROSS CENTRAL MO INTO CENTRAL IL THIS MORNING. 
   EFFECTIVE BULK SHEAR OF 30-35 KT SHOULD SUPPORT ADDITIONAL STRONG TO
   SEVERE STORMS THIS MORNING...MAINLY WITHIN THE SRN HALF OF THE
   WATCH.
   
   HOWEVER...A FEW ELEVATED STORMS...NOW TRACKING ENEWD THROUGH ERN KS
   NEAR THE COLD FRONT...MAY POSE A THREAT FOR ISOLATED HAIL GIVEN
   CONTINUED INFLOW OF A MOIST/UNSTABLE AIR MASS.
   
   ..PETERS.. 03/22/2007
   
   
   ATTN...WFO...LOT...ILX...LSX...DVN...SGF...EAX...
   
   40708959 40698852 39878851 39128891 38628969 38399037
   38149114 38119178 37979300 38009384 38249383 38649339
   38929249 39949225