MESOSCALE DISCUSSION 0849
   NWS STORM PREDICTION CENTER NORMAN OK
   1037 PM CDT FRI MAY 09 2008
   
   AREAS AFFECTED...FAR ERN TN...WRN NC
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 290...
   
   VALID 100337Z - 100430Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 290
   CONTINUES.
   
   OVERALL WEAKENING TREND CONTINUES AS MAIN CONVECTION SPREADS ACROSS
   THE MOUNTAINS...WITH SVR THREAT APPARENTLY ENDING OVER ERN TN. 
   HOWEVER...ENVIRONMENT EAST OF THE HIGHER TERRAIN MAY SUPPORT RENEWED
   DEVELOPMENT/INTENSIFICATION AS THUNDERSTORMS SPREAD INTO THE WRN NC
   AND FAR NWRN SC.  CONTINUE VALID PORTIONS OF WW.
   
   MUCAPE AROUND 500 J/KG IS CURRENTLY IN PLACE ACROSS WW WITH
   EFFECTIVE SHEAR AROUND 40 KT.  SURFACE PARCELS APPEAR TO BE CAPPED
   LATE THIS EVENING...ALTHOUGH EVENING SOUNDINGS INDICATE REGION
   REMAINS UNDER VERY STEEP ELEVATED MIXED-LAYER WITH H7-H5 LAPSE RATES
   IN EXCESS OF 7.5-8 C/KM.  IN ADDITION REGION IS LIKELY BEING
   IMPACTED BY SHORTWAVE TROUGH MOVING ACROSS THE CENTRAL APPALACHIANS
   ATTM.  POTENTIAL WILL REMAIN FOR STRONGER CORES TO REINTENSIFY OR
   NEW DEVELOPMENT TO OCCUR AS TAIL END OF DEEPER ASCENT OVERSPREADS
   EAST OF THE HIGHER TERRAIN WITH PRIMARY THREAT OF LARGE HAIL.
   
   ..EVANS.. 05/10/2008
   
   
   ATTN...WFO...RAH...RNK...CAE...GSP...MRX...FFC...
   
   35008447 35628429 36168353 35978043 34658058