MESOSCALE DISCUSSION 1045
   NWS STORM PREDICTION CENTER NORMAN OK
   0754 AM CDT THU JUN 11 2009
   
   AREAS AFFECTED...WRN/MIDDLE TN
   
   CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 
   
   VALID 111254Z - 111400Z
   
   THUNDERSTORMS ARE INCREASING IN STRENGTH ACROSS WRN/MIDDLE TN THIS
   MORNING...AND INCREASING COVERAGE AND INTENSITY IS EXPECTED OVER THE
   NEXT FEW HOURS. AREA IS BEING MONITORED FOR A POSSIBLE WW. 
   
   MCV IN NRN MS/SWRN TN IS SLOWLY PROGRESSING EWD THIS
   MORNING...PROVIDING FAVORABLE LIFT FOR THUNDERSTORM DEVELOPMENT IN
   CONCERT WITH A SUBTLE VORT MAX NOTED ON WV IMAGERY ROUGHLY NEAR THE
   AR/MS BORDERS. OVERSHOOTING/COOLING TOPS ON VIS AND IR...IN ADDITION
   TO RADAR TRENDS INDICATE STORMS ARE BEGINNING TO STRENGTHEN IN A
   MODERATELY TO VERY UNSTABLE AIRMASS...AS SAMPLED BY THE 12Z BNA
   SOUNDING. MORE THAN ADEQUATE MOISTURE AND EFFECTIVE SHEAR ON THE
   ORDER OF 45 KTS WILL BE SUPPORTIVE OF SEVERE HAIL AND DAMAGING
   WINDS...ESPECIALLY AS WARMING CONTINUES AHEAD OF THE MCV IN A
   RELATIVELY THIN AREA OF CLOUDS...AS SEEN ON VISIBLE SATELLITE
   IMAGERY.
   
   ..HURLBUT.. 06/11/2009
   
   
   ATTN...WFO...LMK...OHX...HUN...PAH...MEG...
   
   LAT...LON   35328636 35088736 35618838 36738759 36798584 36278532
               35588575 35328636