MESOSCALE DISCUSSION 1037
   NWS STORM PREDICTION CENTER NORMAN OK
   1107 PM CDT WED JUN 10 2009
   
   AREAS AFFECTED...ARKLATEX VICINITY TO WESTERN/NORTHERN MS
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 368...
   
   VALID 110407Z - 110530Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 368
   CONTINUES.
   
   SEVERE TSTM WATCH 368 CONTINUES UNTIL 07Z. AN ADDITIONAL AND/OR
   REPLACEMENT WATCH MAY BE ISSUED BY 0430-05Z TO INCORPORATE
   ADDITIONAL PORTIONS OF NORTHERN LA/AR INTO WESTERN MS.
   
   LONG LIVED/150 MILE NORTH-SOUTH EXTENSIVE SQUALL LINE CONTINUES TO
   MAINTAIN WELL-ORGANIZED CHARACTERISTICS AS IT CROSSES THE ARKLATEX
   VICINITY LATE THIS EVENING...WITH A NORTHERN PERIPHERY ROTATING
   COMMA HEAD ACROSS MCCURTAIN COUNTY OK...AND THE REMAINDER OF THE
   LINE BOWING EASTWARD TOWARD THE TEXARKANA/LONGVIEW AREAS AS OF
   0345Z. WITH A MID LEVEL SPEED MAXIMA CROSSING THE REGION...REGIONAL
   WIND PROFILERS/WSR-88D DERIVED WINDS IN THE WAKE OF THIS SQUALL LINE
   IMPLY SOME ADDITIONAL ENHANCEMENT TO THE LOW TO MID TROPOSPHERIC
   FLOW WITH POTENTIAL ONGOING DEVELOPMENT OF AN MCV. EVEN WITH A
   GRADUAL INCREASE IN NEAR SURFACE CINH AHEAD OF THE SQUALL LINE...THE
   ORGANIZED NATURE OF THE MCS/EXISTING SURFACE COLD POOL AND
   AFOREMENTIONED MCV DEVELOPMENT...ALONG WITH STEEP MID LEVEL LAPSE
   RATES/DRY AIR ALOFT SAMPLED BY THE 00Z SHREVEPORT OBSERVED
   RAOB...ARE ALL SUGGESTIVE OF SEVERE MCS MAINTENENCE INTO THE
   OVERNIGHT. WITH EXPECTATIONS FOR A MAINLY DAMAGING WIND THREAT TO
   CONTINUE...AN ADDITIONAL OR REPLACEMENT WATCH MAY BE NEEDED WITHIN
   THE HOUR.
   
   ..GUYER.. 06/11/2009
   
   
   ATTN...WFO...MEG...JAN...LZK...SHV...TSA...
   
   LAT...LON   34129497 35129368 35368978 32449119 31569468 34129497