MESOSCALE DISCUSSION 0300
   NWS STORM PREDICTION CENTER NORMAN OK
   0922 PM CST MON FEB 25 2008
   
   AREAS AFFECTED...FAR EASTERN TX/NORTHERN LA/SOUTHERN AR INTO
   NORTHWEST/WEST CENTRAL MS
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 75...
   
   VALID 260322Z - 260445Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 75
   CONTINUES.
   
   SEVERE THUNDERSTORM WATCH 75 CONTINUES UNTIL 08Z...WITH A RISK FOR
   LARGE HAIL/DAMAGING WIND GUSTS DEVELOPING EASTWARD ACROSS SOUTHERN
   AR/NORTHERN LA INTO NORTHWEST/WEST CENTRAL MS OVER THE NEXT SEVERAL
   HOURS. IN ADDITION...MONITORING FOR AN ADDITIONAL WATCH AND/OR
   EXTENSION ACROSS FAR EASTERN TX INTO CENTRAL LA.
   
   PRIMARY COLD FRONT CONTINUES TO SPREAD SOUTHEASTWARD ACROSS THE
   ARKLATEX VICINITY...OVERTAKING INITIAL COLD FRONT AND DRYLINE WITH
   STORMS QUICKLY INCREASING/EXPANDING ACROSS SOUTHWEST AR AS OF 03Z.
   WITHIN THE AMBIENT WARM SECTOR AHEAD OF THE FRONT...LOW TO MID 60S F
   DEWPOINTS CONTINUE TO STEADILY DEVELOP NORTHEASTWARD ACROSS FAR EAST
   CENTRAL TX/CENTRAL LA AS OF 03Z...WITH MID/UPPER 50S F DEWPOINTS
   INTO SOUTHEAST AR/FAR WEST CENTRAL MS. OVERALL...STORMS ARE EXPECTED
   TO INCREASE IN AREAL COVERAGE OVER THE NEXT FEW HOURS AS LARGE SCALE
   ASCENT/LINEAR FRONTAL FORCING SPREADS EAST-SOUTHEAST ACROSS THE
   ARKLATEX REGION...WITHIN AN ENVIRONMENT CHARACTERIZED BY STRONG
   VERTICAL SHEAR/MARGINAL INSTABILITY. AS SUCH...POTENTIAL FOR SEVERE
   HAIL/DAMAGING WIND GUSTS SHOULD DEVELOP EASTWARD ACROSS MUCH OF
   SOUTHERN AR AND NORTHERN LA PORTIONS OF SEVERE WATCH 75 OVER THE
   NEXT FEW HOURS...AND INTO NORTHWEST/WEST CENTRAL MS PERHAPS AS EARLY
   AS 05Z-06Z. FARTHER SOUTHWEST...STORMS HAVE RECENTLY INCREASED IN
   VICINITY OF PACIFIC FRONT ACROSS FAR EASTERN TX BETWEEN LONGVIEW AND
   LUFKIN. IF AN UPWARD CONVECTIVE COVERAGE/INTENSITY TREND CONTINUES
   TO OCCUR OVER THE NEXT 1-2 HOURS...AN ADDITIONAL WATCH COULD BE
   NEEDED ACROSS FAR EASTERN TX/CENTRAL LA SOUTH OF WW 75.
   
   ..GUYER.. 02/26/2008
   
   
   ATTN...WFO...MEG...JAN...LZK...LCH...SHV...
   
   33799347 34369211 34419096 34129031 33039047 31919196
   31069345 31119447 31759482 32479450