MESOSCALE DISCUSSION 0022
   NWS STORM PREDICTION CENTER NORMAN OK
   0904 PM CST TUE JAN 06 2009
   
   AREAS AFFECTED...SE AL...WRN FL PANHANDLE AND SW GA
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 070304Z - 070500Z
   
   STORMS ALONG SRN END OF LINE ACROSS SW AL INTO THE N CNTRL GULF HAVE
   UNDERGONE A SLIGHT INCREASE IN INTENSITY DURING THE LAST HOUR.
   CONVECTIVE TRENDS WILL CONTINUE TO BE MONITORED FOR A POSSIBLE WW.
   
   LATE THIS EVENING A SQUALL LINE EXTENDS FROM N CNTRL GA SWWD THROUGH
   SW AL INTO THE N CNTRL GULF. LIGHTNING REMAINS INACTIVE ALONG MUCH
   OF THE LINE. AN EXCEPTION IS ALONG SRN PORTIONS WHERE GREATER
   INSTABILITY EXISTS AND AN INCREASE IN BOTH LIGHTNING AND
   REFLECTIVITY HAS BEEN OBSERVED DURING THE PAST HOUR. ACTIVITY
   REMAINS EMBEDDED WITHIN STRONG LOW LEVEL AND BULK SHEAR ALONG LOW
   LEVEL JET AND AHEAD OF UPPER TROUGH. A MAJOR LIMITING FACTOR HAS
   BEEN THE MARGINAL THERMODYNAMIC ENVIRONMENT WITH THE 00Z SOUNDINGS
   FROM TALLAHASSEE AND ATLANTA SHOWING MEAGER INSTABILITY WITH A
   PRONOUNCED INVERSION AROUND 700 MB IN WARM SECTOR. AS A
   RESULT...CONVECTION DEVELOPING AHEAD OF LINE REMAINS SHALLOW AND
   CONTINUES TO STRUGGLE. WV IMAGERY SHOWS A SHORTWAVE TROUGH ROUNDING
   THE UPPER TROUGH BASE AND THIS FEATURE WILL EJECT ENEWD OVERNIGHT.
   AS THE UPPER TROUGH CONTINUES EAST...ASCENT AND COOLING IN VICINITY
   OF THE LINE MAY BECOME SUFFICIENT TO MOISTEN AND COOL THE INVERSION
   LAYER. IF THIS OCCURS...MORE ROBUST CONVECTION WOULD DEVELOP WITH AN
   ATTENDANT INCREASE IN THE THREAT FOR DAMAGING WIND AND ISOLATED
   TORNADOES GIVEN THE FAVORABLE WIND PROFILES. TRENDS ARE BEING
   CLOSELY MONITORED.
   
   ..DIAL.. 01/07/2009
   
   
   ATTN...WFO...FFC...TAE...BMX...MOB...
   
   LAT...LON   31458425 30688511 30138674 30478772 31198692 31688612
               32468482 32328396 31458425