MESOSCALE DISCUSSION 0197
   NWS STORM PREDICTION CENTER NORMAN OK
   0145 PM CST SAT FEB 24 2007
   
   AREAS AFFECTED...N CNTRL/NE LA THRU SE AR...NW MS
   
   CONCERNING...TORNADO WATCH 30...32...
   
   VALID 241945Z - 242145Z
   
   CONTINUE WWS.  TORNADO POTENTIAL REMAINS RELATIVELY HIGH ACROSS
   PARTS OF NORTHEAST LOUISIANA/SOUTHEAST ARKANSAS LATE THIS AFTERNOON.
   
   INTENSE CYCLONIC MID/UPPER JET CONTINUES TO NOSE NORTHEASTWARD
   INTO/THROUGH THE LOWER RED RIVER VALLEY/OZARK PLATEAU REGION.  AS
   THIS OCCURS...60-70 KT 850 JET IS GRADUALLY SHIFTING EASTWARD INTO
   THE LOWER MISSISSIPPI VALLEY...AHEAD OF SECONDARY SURFACE LOW
   MIGRATING ACROSS NORTH CENTRAL INTO NORTHEAST ARKANSAS.  LOW-LEVEL
   COLD ADVECTION IS INCREASING ALONG TRAILING SURFACE TROUGH/DRY LINE
   INTO EASTERN TEXAS...AND BOUNDARY MAY SERVE TO FOCUS SOLIDIFYING
   LINE OF STORMS NEXT FEW HOURS.  STORMS ON SOUTHERN FLANK OF LINE...
   AND ISOLATED SUPERCELLS DEVELOPING JUST AHEAD OF FRONTAL BAND...
   WILL CONTINUE TO POSE HIGHEST RISK FOR TORNADIC ACTIVITY NEXT FEW
   HOURS.  GREATEST RISK THROUGH 22-23Z APPEARS TO BE NORTHWEST OF
   MONROE LA INTO AREAS NEAR/NORTH OF GREENVILLE LA...WHERE SURFACE DEW
   POINTS ARE RISING INTO/THROUGH THE LOWER/MID 60S...AND STORMS ARE
   LIKELY ROOTED CLOSEST TO THE SURFACE.  GIVEN EXTREME MAGNITUDE OF
   LOW-LEVEL SHEAR...RISK FOR ISOLATED STRONG OR VIOLENT TORNADOES
   APPEARS RELATIVELY HIGH.
   
   ..KERR.. 02/24/2007
   
   
   ATTN...WFO...MEG...JAN...LZK...SHV...
   
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