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Mesoscale Discussion 921
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   MESOSCALE DISCUSSION 0921
   NWS STORM PREDICTION CENTER NORMAN OK
   0154 PM CDT MON JUN 09 2014

   AREAS AFFECTED...NORTHERN LA AND SOUTHERN/EASTERN AR TO
   WESTERN/NORTHERN MS AND WESTERN TN

   CONCERNING...SEVERE THUNDERSTORM WATCH 267...

   VALID 091854Z - 092030Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 267
   CONTINUES.

   SUMMARY...THE POTENTIAL FOR DAMAGING WINDS AND SOME SEVERE
   HAIL/POSSIBLY A TORNADO SHOULD INCREASE THROUGH MID/LATE AFTERNOON
   ACROSS NORTHERN LA/EASTERN AR INTO WESTERN/NORTHERN MS AND WESTERN
   TN. SEVERE THUNDERSTORM WATCH 267 CONTINUES UNTIL 00Z/7PM CDT. AN
   WATCH COULD BE NEEDED WITHIN THE HOUR FOR ADDITIONAL PORTIONS OF
   NORTHEAST AR/WESTERN TN.

   DISCUSSION...A FRAGMENTED SQUALL LINE...EXTENDING FROM JUST EAST OF
   THE LITTLE ROCK AREA INTO NORTH-CENTRAL/WEST-CENTRAL LA AS OF
   1830Z...WILL CONTINUE A GENERAL EAST-NORTHEASTWARD PROGRESSION
   THROUGH THE AFTERNOON. AT 18Z...A WEAK SURFACE LOW WAS NOTED NEAR
   THE LITTLE ROCK AREA WITH PRECEDING PRESSURE FALLS AS FAR EAST AS
   NORTHERN MS/WESTERN TN. A PRIOR OUTFLOW BOUNDARY ALONG THE AR/LA
   BORDER INTO CENTRAL MS HAS LARGELY MODIFIED...WITH STEADY
   WARMING/DESTABILIZATION CURRENTLY OCCURRING AS FAR NORTH AS
   NORTHEAST AR/SOUTHWEST TN IN TANDEM WITH A NORTHWARD-MOVING WARM
   FRONT. LATEST WSR-88D VWP DATA FROM LITTLE ROCK IN SAMPLING 50+ KT
   SOUTHWESTERLY WINDS BETWEEN 2-6 KM IN THE IMMEDIATE WAKE OF THE
   SQUALL LINE. ADDITIONAL BOUNDARY LAYER HEATING/MOISTENING...ALONG
   WITH INCREASING INFLUENCES OF AN UPSTREAM UPPER LOW OVER THE
   SOUTHERN PLAINS...WILL LIKELY INFLUENCE AN INCREASE IN QUASI-LINEAR
   ORGANIZATION/INTENSITY OVER THE NEXT FEW HOURS.

   ..GUYER.. 06/09/2014


   ATTN...WFO...PAH...MEG...JAN...LZK...SHV...

   LAT...LON   35429145 36379031 36508871 35408816 33298930 31849109
               31689313 34329182 35429145 

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Page last modified: June 09, 2014
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