MESOSCALE DISCUSSION 1571
   NWS STORM PREDICTION CENTER NORMAN OK
   0536 PM CDT WED JUL 15 2009
   
   AREAS AFFECTED...SOUTHEAST MO/FAR SOUTHERN IL/FAR NORTHEAST AR INTO
   WESTERN KY/WESTERN TN
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 585...
   
   VALID 152236Z - 152330Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 585
   CONTINUES.
   
   SEVERE TSTM WATCH 585 CONTINUES UNTIL 02Z ACROSS SOUTHEAST MO.
   MAINLY A DAMAGING WIND THREAT WILL CONTINUE ACROSS FAR SOUTHERN
   IL/FAR NORTHEAST AR/MO BOOTHEEL AND PERHAPS WESTERN KY/WESTERN TN.
   
   AIDED BY EARLIER MCV AND A GRADUALLY EXPANDING SURFACE COLD
   POOL...SOUTHWEST-NORTHEAST ORIENTED QUASI-LINEAR MCS CONTINUES TO
   CONGEAL/ADVANCE SOUTHEASTWARD ACROSS FAR SOUTHEAST MO AND EXTREME
   NORTHEAST AR AS OF 2215Z. MODERATE SOUTHEASTWARD MOVEMENT /30-35 KT/
   AND CONTINUED UPLIFT ALONG THE GUST FRONT WILL CONTRIBUTE TO A
   CONTINUED MAINLY DAMAGING WIND THREAT OVER THE NEXT FEW HOURS INTO A
   RATHER MOIST/UNSTABLE AIRMASS EITHER SIDE OF THE MS RIVER...WITH AS
   MUCH AS 3000-4000 J/KG OF MLCAPE PER LATEST RUC-BASED OBJECTIVE
   ANALYSIS. AS STORM MERGERS CONTINUE TO OCCUR...A RECENT MODEST
   SOUTHEASTWARD ACCELERATION MAY SIGNAL A SOMEWHAT MORE
   ORGANIZED/SUSTAINED SEVERE THREAT ACROSS EXTREME NORTHEAST AR/MO
   BOOTHEEL VICINITY...WITH A 44 KT GUST RECENTLY MEASURED AT CORNING
   AR. THE MODEST FORWARD MOVEMENT OF THE QUASI-LINEAR MCS AND EXPECTED
   RELATIVE SHORT DURATION OF THE SEVERE THREAT MAY PRECLUDE AN
   ADDITIONAL WATCH ISSUANCE...BUT SHORT TERM TRENDS WILL CONTINUE TO
   BE MONITORED FOR A POSSIBLE WATCH.
   
   ..GUYER.. 07/15/2009
   
   
   ATTN...WFO...PAH...MEG...LSX...LZK...SGF...
   
   LAT...LON   38208994 38188864 37028821 35948857 35238988 35559176
               36589182 36899046 38208994