MESOSCALE DISCUSSION 0775
   NWS STORM PREDICTION CENTER NORMAN OK
   1151 PM CDT FRI MAY 08 2009
   
   AREAS AFFECTED...VA/NORTHERN NC
   
   CONCERNING...TORNADO WATCH 276...
   
   VALID 090451Z - 090615Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 276 CONTINUES.
   
   TORNADO WATCH 276 CONTINUES UNTIL 07Z ACROSS PORTIONS OF WESTERN
   VA/NORTHWEST NC. MONITORING FOR AN ADDITIONAL WATCH FARTHER EAST
   ACROSS VA/NORTHERN NC.
   
   MID LEVEL MCV ASSOCIATED WITH EARLY DAY/UPSTREAM BOW ECHO CONTINUES
   TO QUICKLY PROGRESS EASTWARD ACROSS THE CENTRAL APPALACHIANS STRONG
   40-50 KT WESTERLY MID LEVEL FLOW. ACROSS THE EASTERN PORTION OF
   TORNADO WATCH 276...SURFACE COLD POOL AND PRESSURE
   PERTURBATION/COUPLET APPEARS TO HAVE SUFFICIENTLY SURVIVED CROSSING
   THE VA MOUNTAINS...WITH AN UPSWING IN TSTM INTENSITY NOTED FROM
   SOUTHWEST INTO SOUTH CENTRAL VA OVER THE PAST HOUR. GIVEN THE PARENT
   MCV AND STRONG/LARGELY UNIDIRECTIONAL VERTICAL SHEAR AND RELATIVELY
   MOIST/UNSTABLE DOWNSTREAM AIRMASS ACROSS VA/NORTHERN NC...AN
   ADDITIONAL WATCH MAY BE NEEDED.
   
   ..GUYER.. 05/09/2009
   
   
   ATTN...WFO...AKQ...MHX...RAH...RNK...
   
   LAT...LON   37167969 37317831 37717727 37417638 36727638 35887724
               35927839 36438017 37167969