MESOSCALE DISCUSSION 0405
   NWS STORM PREDICTION CENTER NORMAN OK
   1108 PM CDT SUN APR 05 2009
   
   AREAS AFFECTED...ERN TN TO WV
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 120...
   
   VALID 060408Z - 060515Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 120
   CONTINUES.
   
   LINEAR MCS CONTINUES ITS RAPID MOVEMENT EAST ACROSS SEVERE
   THUNDERSTORM WATCH 120.  THIS ACTIVITY IS PROGRESSING THROUGH THE
   REMNANTS OF STEEPER LOW LEVEL LAPSE RATES OVER WV THAT WERE
   GENERATED FROM EARLIER DAYTIME HEATING.  DESPITE THE MEAGER MOISTURE
   IN PLACE THIS POCKET OF INSTABILITY APPEARS TO BE PARTLY RESPONSIBLE
   FOR ONGOING ISOLATED ROBUST UPDRAFTS AND AT TIMES STRONG LINE
   SEGMENTS.  CONVECTIVE OVERTURNING AND THE ENTRAINMENT OF MUCH DRIER
   AIR EAST OF THE APPALACHIAN RIDGE SUGGEST THUNDERSTORMS WILL WEAKEN
   AS THEY SPREAD EAST OF THE HIGHER TERRAIN.
   
   ..DARROW.. 04/06/2009
   
   
   ATTN...WFO...PBZ...RLX...GSP...MRX...JKL...ILN...LMK...OHX...
   
   LAT...LON   35708558 39508254 39507990 35708306 35708558