MESOSCALE DISCUSSION 0457
   NWS STORM PREDICTION CENTER NORMAN OK
   0300 AM CDT FRI APR 12 2013
   
   AREAS AFFECTED...ERN SC...SRN NC
   
   CONCERNING...TORNADO WATCH 102...
   
   VALID 120800Z - 120930Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 102 CONTINUES.
   
   SUMMARY...AN ISOLATED SEVERE THREAT WILL LIKELY CONTINUE FOR SEVERAL
   MORE HOURS ACROSS ERN SC AND SRN NC. WIND DAMAGE AND A TORNADO WILL
   BE POSSIBLE AS THE LINE MOVES EWD ACROSS THE REMAINDER OF TORNADO
   WATCH 102.
   
   DISCUSSION...A LINE OF STRONG THUNDERSTORMS IS CURRENTLY ONGOING
   ACROSS ERN SC JUST AHEAD OF A SHORTWAVE TROUGH AND VORTICITY MAX
   EVIDENT ON WATER VAPOR IMAGERY. STRONG LARGE-SCALE ASCENT ASSOCIATED
   WITH THE SHORTWAVE TROUGH IS HELPING TO SUPPORT THE LINE IN SPITE OF
   WEAK INSTABILITY. IN ADDITION...THE WSR-88D VWP AT WILMINGTON NC
   SHOWS ABOUT 50 KT OF 0-6 KM SHEAR AND 40 KT OF SLY FLOW AT 1 KM. THE
   STRONG FLOW MAY ENABLE THE MORE INTENSE SEGMENTS OF THE LINE TO HAVE
   A WIND DAMAGE THREAT. SFC DEWPOINTS IN THE MID 60S F AND SPEED SHEAR
   IN THE BOUNDARY LAYER MAY ALSO ENABLE ROTATING CELLS EMBEDDED IN THE
   LINE TO HAVE AN ISOLATED TORNADO THREAT.
   
   ..BROYLES/HART.. 04/12/2013
   
   
   ATTN...WFO...MHX...RAH...ILM...CHS...CAE...
   
   LAT...LON   34478009 34777985 34997935 34927843 34737766 34457749
               34087772 33667850 33197909 32667974 32758016 33608019
               34478009