MESOSCALE DISCUSSION 0180
   NWS STORM PREDICTION CENTER NORMAN OK
   0807 AM CST WED FEB 29 2012
   
   AREAS AFFECTED...NERN AR/PART OF WRN TN/FAR SERN MO AND WRN KY
   
   CONCERNING...TORNADO WATCH 44...45...
   
   VALID 291407Z - 291500Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 44...45...CONTINUES.
   
   WW 44 WHICH IS SCHEDULED TO EXPIRE AT 15Z MAY NEED TO BE EXTENDED
   LOCALLY IN TIME TO 16 OR 17Z.  AN ONGOING STRONG-SEVERE STORM OVER
   FULTON COUNTY KY/OBION COUNTY TN IS TRACKING ENE AND WILL AFFECT THE
   FAR SERN PART OF WW 44 BETWEEN 15-1630Z.
   
   AT 14Z...REGIONAL RADAR IMAGERY/LIGHTNING DATA SHOWED THE WRN EXTENT
   OF THE OVERNIGHT MCS EXTENDED FROM WRN KY SWWD INTO NERN AR....WITH
   ONGOING STRONG TO SEVERE STORMS EMBEDDED WITHIN THIS LINE.  THIS
   ACTIVITY WAS LOCATED WITHIN A CORRIDOR OF WEAK INSTABILITY /MUCAPE
   AROUND 500 J/KG/...BUT STRONG DEEP LAYER SHEAR /50-70 KT/ AND LOW
   LEVEL SHEAR /EFFECTIVE SRH OF 300-500 M2 PER S2/ CONTINUE TO FAVOR
   BOWING SEGMENTS AND A TORNADO THREAT.
   
   ..PETERS.. 02/29/2012
   
   
   ATTN...WFO...LMK...OHX...PAH...MEG...LZK...
   
   LAT...LON   35869153 36499049 37068878 37498789 37728691 36698710
               36428805 35818829 35438879 35379033 35339167 35869153