MESOSCALE DISCUSSION 0357
   NWS STORM PREDICTION CENTER NORMAN OK
   0923 PM CDT SAT MAR 24 2012
   
   AREAS AFFECTED...PORTIONS CENTRAL/ERN NC...CENTRAL/SRN VA.
   
   CONCERNING...TORNADO WATCH 108...109...
   
   VALID 250223Z - 250400Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 108...109...CONTINUES.
   
   WWS CAN CONTINUE TO BE CLEARED BEHIND WEAKENING MCS ACROSS REGION. 
   ACTIVITY HAS SHOWN DECREASING TREND AS IT ENCOUNTERS BOUNDARY-LAYER
   AIR STABILIZED PROGRESSIVELY MORE STRONGLY WITH TIME BY COMBINATION
   OF
   1. SFC DIABATIC COOLING NEAR SFC AND
   2. OUTFLOW-STABILIZED AIR FROM EARLIER CONVECTION.
   AS SUCH...INFLOW-LAYER PARCELS EXHIBIT MEAGER MLCAPE -- AOB 300 J/KG
   MOST AREAS -- AND MAY NOT BE ROOTED AT SFC ANYMORE...BASED ON
   MODIFIED RAOBS AND RUC FCST SOUNDINGS.  THOUGH ISOLATED SVR CANNOT
   BE RULED OUT...OVERALL THREAT HAS DIMINISHED SUCH THAT EITHER OR
   BOTH WWS MAY BE CANCELED BEFORE THEIR SCHEDULED EXPIRATION TIMES.
   
   THREAT FOR LOCALIZED HEAVY RAIN RATES NEAR 2 INCHES/HOUR WILL
   PERSIST FOR ANOTHER HOUR OR TWO WITH STRONGEST PORTION OF
   COMPLEX...LOCATED OVER PORTIONS AMELIA/POWHATAN COUNTIES VA AS OF
   215Z AND MOVING NEWD TOWARD RIC AREA.
   
   ..EDWARDS.. 03/25/2012
   
   
   ATTN...WFO...AKQ...MHX...LWX...RAH...
   
   LAT...LON   35677850 36787819 37537812 37907823 38097752 37657691
               36677696 36207658 35567685 35127809 35677850