MESOSCALE DISCUSSION 0108
   NWS STORM PREDICTION CENTER NORMAN OK
   0838 PM CST WED JAN 30 2013
   
   AREAS AFFECTED...CENTRAL AND SOUTHERN VA/MD...WASHINGTON D.C.
   
   CONCERNING...TORNADO WATCH 24...
   
   VALID 310238Z - 310345Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 24 CONTINUES.
   
   SUMMARY...SEVERE THREAT DIMINISHING THIS EVENING ACROSS MUCH OF WW
   24. SOUTHEASTERN PORTIONS OF THE WATCH AREA MAY SEE A BETTER CHANCE
   FOR ISOLATED STRONG WINDS OR A WEAK TORNADO AFTER 03Z.
   
   DISCUSSION...SEVERE POTENTIAL WILL CONTINUE TO DECREASE ACROSS MUCH
   OF THE WATCH AREA TONIGHT. THE EXCEPTION MAY BE ACROSS SOUTHEASTERN
   PORTIONS OF THE WATCH WHERE THE AIRMASS HAS REMAINED UNAFFECTED BY
   EARLIER CONVECTION. A LINE OF CONVECTION TO THE SOUTH OF THE AREA
   ACROSS N-CNTRL NC INTO S-CNTRL VA WILL CONTINUE TO TRACK E/NE.
   SHOULD THE LINE DEVELOP FAR ENOUGH NWD...SOUTHEASTERN PORTIONS OF WW
   24 MAY SEE AN ISOLATED SEVERE/TORNADO THREAT. OTHERWISE...MUCH OF WW
   24 MAY BE ABLE TO BE CANCELLED BEFORE 07Z EXPIRATION TIME.
   
   ..LEITMAN/CORFIDI.. 01/31/2013
   
   
   ATTN...WFO...PHI...AKQ...LWX...RNK...
   
   LAT...LON   39697762 39687573 37527721 37507904 39697762