MESOSCALE DISCUSSION 1247
   NWS STORM PREDICTION CENTER NORMAN OK
   0819 PM CDT FRI JUN 19 2009
   
   AREAS AFFECTED...PARTS OF SERN OH / CNTRL WV / NW AND S-CNTRL VA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 482...
   
   VALID 200119Z - 200145Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 482
   CONTINUES.
   
   SEVERE POTENTIAL WILL LIKELY WANE THE NEXT HOUR OR TWO ACROSS PARTS
   OF SERN OH EXTENDING SEWD INTO S-CNTRL VA IN CONJUNCTION WITH LOSS
   OF DAYTIME HEATING.
   
   AN ISOLD --ALBEIT LIMITED-- SEVERE THREAT HAS EFFECTIVELY BEEN
   CONFINED S AND W OF DIFFUSE BAROCLINIC ZONE ACROSS THE UPPER OH
   RIVER VALLEY TO THE ERN SHORE.  EXISTING SEVERE POTENTIAL APPEARS
   RATHER LOW ACROSS THE REMAINDER OF WW 482 AS LATE AFTERNOON SEVERE
   CLUSTER OVER ERN OH HAS NOW DISSIPATED.  THE MOST SIGNIFICANT STORM
   AS OF 0115Z IS OVER S-CNTRL VA...WITH LOW LEVEL ROTATION EVIDENT PER
   KAKQ RADAR IMAGERY.  00Z RNK RAOB DISPLAYED A WARM LAYER IN THE
   H8-H75 LAYER...AND WITH VERY WEAK BACKGROUND SUPPORT FOR LARGE SCALE
   ASCENT ATTENDANT TO WEAK UPPER VORT OVER THE UPPER OH RIVER
   VALLEY...UPDRAFTS MAY STRUGGLE AMIDST A MODESTLY SHEARED PROFILE
   BEFORE DISSIPATING THE NEXT FEW HOURS.  AN ISOLD LARGE
   HAIL...PERHAPS DMGG WIND THREAT MAY REMAIN IN THE NEAR TERM WITH THE
   STRONGER CORES.
   
   ..SMITH.. 06/20/2009
   
   
   ATTN...WFO...AKQ...LWX...RNK...PBZ...RLX...
   
   LAT...LON   40008136 39158071 38658017 38007866 37777781 37297760
               37007772 36687779 36647808 36927843 37657926 38238090
               38538119 39218141 40058210 40238197 40008136