MESOSCALE DISCUSSION 2143
   NWS STORM PREDICTION CENTER NORMAN OK
   0735 AM CDT TUE SEP 06 2011
   
   AREAS AFFECTED...WRN THROUGH CNTRL THROUGH E-CNTRL NC...EXTREME SERN
   VA AND NERN SC
   
   CONCERNING...TORNADO WATCH 845...
   
   VALID 061235Z - 061400Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 845 CONTINUES.
   
   THREAT FOR ISOLATED TORNADOES WILL PERSIST ACROSS CNTRL AND E-CNTRL
   NC...SERN VA AND NERN SC THROUGH THE MORNING. OTHER CONVECTION HAS
   BEEN INCREASING FARTHER WEST ACROSS W-CNTRL NC AND EXTREME SWRN VA
   AND TRENDS ARE BEING MONITORED FOR A POSSIBLE TORNADO THREAT AND WW
   IN THIS REGION AS WELL.
   
   WIDELY SCATTERED CONVECTION PERSISTS OVER THE ERN CAROLINAS ALONG
   SEVERAL CONFLUENCE BANDS WITHIN WARM CONVEYOR BELT EAST OF UPPER LOW
   CIRCULATION. PRIMARY BAND OF INTEREST FROM THE GULF STREAM NWD
   THROUGH NERN SC AND CNTRL NC IS LOCATED IN A FAVORABLE POSITION
   RELATIVE TO SLIGHTLY GREATER INSTABILITY OVER ERN NC AND LARGEST
   HODOGRAPHS FROM CNTRL THROUGH W-CNTRL NC AND NERN SC. OCCASIONAL
   SUPERCELL STRUCTURES CONTINUE TO BE OBSERVED. LATEST VISIBLE IMAGERY
   SHOWS CLOUD BREAKS ACROSS THE ERN HALF OF THE CAROLINAS WHICH SHOULD
   BOOST LOW LEVEL LAPSE RATES AND UPDRAFT STRENGTH AS THE MORNING
   PROGRESSES. THIS SUGGEST THE SEVERE THREAT COULD UNDERGO AT LEAST A
   MODEST INCREASE AS THE BOUNDARY LAYER BEGINS TO WARM.
   
   FARTHER WEST ACROSS WRN AND W-CNTRL NC...STORMS HAVE BEEN INCREASING
   ALONG CONVERGENCE BANDS AND WEST OF EWD PROPAGATING GRAVITY WAVE.
   VISIBLE IMAGERY SHOWS THIS AREA TO BE MORE CLOUDY THAN FARTHER
   EAST...AND SHOULD TAKE A LITTLE LONGER FOR THE BOUNDARY LAYER TO
   DESTABILIZE. NEVERTHELESS...TORNADO THREAT MAY CONTINUE TO INCREASE
   THROUGH MID MORNING AS THE BOUNDARY LAYER BEGINS TO WARM.
   
   ..DIAL.. 09/06/2011
   
   
   ATTN...WFO...AKQ...MHX...RAH...ILM...RNK...CAE...GSP...
   
   LAT...LON   35748142 36187987 36367855 36797701 36177725 35127755
               34017787 33527851 33467973 34648087 35748142