MESOSCALE DISCUSSION 1048
   NWS STORM PREDICTION CENTER NORMAN OK
   1051 AM CDT THU JUN 11 2009
   
   AREAS AFFECTED...S-CNTRL PA SWD INTO MD...ERN WV AND CNTRL/ERN VA
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 111551Z - 111715Z
   
   STRONG/SEVERE STORM DEVELOPMENT WILL BE POSSIBLE THIS AFTERNOON: 1)
   ALONG LEE TROUGH AND/OR 2) IN ASSOCIATION WITH REMNANT LARGE-SCALE
   BOWING SYSTEM WHICH WILL LIKELY REINTENSIFY WHILE MOVING INTO THE
   PIEDMONT.  CONVECTIVE TRENDS ARE BEING MONITORED FOR A POSSIBLE WW.
   
   LARGE-SCALE BOWING CONVECTIVE STRUCTURE...EXTENDING ALONG A
   HLG-EKN-15 W ROA LINE AS OF 1535Z HAS DECAYED SLIGHTLY OVER THE PAST
   SEVERAL HOURS OWING TO DIURNAL TRENDS AND MOVEMENT OF SYSTEM THROUGH
   HIGHER TERRAIN.  SO FAR...THE GREATEST DESTABILIZATION OF DOWNSTREAM
   AIR MASS HAS OCCURRED OVER THE PIEDMONT AND COASTAL PLAIN OF
   CNTRL/SRN VA WHERE DEWPOINTS IN THE UPPER 60S TO LOWER 70S COINCIDES
   WITH THE STRONGEST DIABATIC HEATING...SUPPORTING MLCAPE OF 1000-1500
   J/KG.  FURTHER N...BOUNDARY LAYER HAS BEEN SLOWER TO WARM DUE TO
   MORE WIDESPREAD CLOUDS.  HOWEVER...CONTINUED MOISTENING AND HEATING
   OF AIR MASS SHOULD CONTRIBUTE TO POCKETS OF MODERATE INSTABILITY
   LATER THIS AFTERNOON NWD INTO SRN PA.
   
   VWP DATA IN THE WAKE OF BOWING SYSTEM AT JKL/RLX INDICATE RATHER
   STRONG WLY FLOW /40-50 KT/ IN THE 2-5 KM AGL LAYER.  THESE STRONGER
   WINDS SHOULD GRADUALLY DEVELOP E OF THE BLUE RIDGE TODAY WITH
   APPROACH OF MIDLEVEL TROUGH THROUGH THE OH AND TN VALLEYS.  AS
   SUCH...THE POTENTIAL WILL EXIST FOR REINTENSIFICATION OF CONVECTIVE
   SYSTEM AS IT BEGINS TO ENCOUNTER AN INCREASINGLY UNSTABLE AIR MASS
   DEVELOPING OVER THE PIEDMONT.  ABOVE-MENTIONED KINEMATIC PROFILES
   WOULD SUPPORT THE DEVELOPMENT OF BOWING STRUCTURES CAPABLE OF
   DAMAGING WINDS AND SOME HAIL.
   
   ..MEAD.. 06/11/2009
   
   
   ATTN...WFO...AKQ...CTP...LWX...RNK...PBZ...
   
   LAT...LON   37057939 38957925 40027898 40457835 40497753 40037668
               38167658 36747748 36687890 37057939