MESOSCALE DISCUSSION 0886
   NWS STORM PREDICTION CENTER NORMAN OK
   0634 PM CDT THU MAY 28 2009
   
   AREAS AFFECTED...PORTIONS OF TN/KY/WV/VA/NC
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 313...
   
   VALID 282334Z - 290030Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 313
   CONTINUES.
   
   SEVERE THREAT CONTINUES FOR WW313...BUT WILL LIKELY CONTINUE TO SEE
   A RAPID DOWNWARD TREND IN SEVERITY OVER THE NEXT HOUR OR TWO.
   
   EFFECTIVE SHEAR NEAR 25-35 KTS AND WEAK INSTABILITY HAS MAINTAINED A
   FEW LOOSELY ORGANIZED CLUSTERS OF STORMS. HOWEVER...MAIN UPPER
   SUPPORT HAS NOW MOVED NWD OUT OF THE WATCH AREA...WITH ONE VORT MAX
   NOW MOVING INTO CNTRL OH...AND A SECONDARY VORT MAX MOVING NEWD INTO
   SRN/CNTRL IND. ANVIL-LEVEL WINDS HAVE BECOME ALIGNED NEARLY PARALLEL
   TO LINES/CLUSTERS OF CONVECTION...AND EXTENSIVE ANVIL DEBRIS IN
   COMBINATION WITH DIURNAL COOLING IS RAPIDLY DECREASING INSTABILITY.
   AS UPPER FORCING CONTINUES TO EXIT THE AREA AND INSTABILITY FURTHER
   DECREASES...EXPECT A DOWNWARD TREND IN CONVECTION OVER THE NEXT HOUR
   OR TWO. EARLY CANCELLATION OF THE WATCH MAY BE CONSIDERED.
   
   ..HURLBUT.. 05/28/2009
   
   
   ATTN...WFO...RNK...RLX...GSP...MRX...JKL...ILN...OHX...HUN...
   
   LAT...LON   35008637 38588305 38567985 35028330 35008637