THE NWS STORM PREDICTION CENTER HAS ISSUED A    TORNADO WATCH FOR PORTIONS OF              PARTS OF SOUTHERN MARYLAND           A LARGE PART OF NORTHERN NORTH CAROLINA           A LARGE PART OF SOUTHERN AND EASTERN VIRGINIA           COASTAL WATERS       EFFECTIVE THIS FRIDAY MORNING FROM 300 AM UNTIL 900 AM EDT.       TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND    GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE    AREAS.       THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE    MILES NORTH AND SOUTH OF A LINE FROM 20 MILES WEST SOUTHWEST OF    GREENSBORO NORTH CAROLINA TO 50 MILES NORTHEAST OF NORFOLK    VIRGINIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE    ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).       REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR    TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH    AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR    THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS    AND POSSIBLE WARNINGS.       OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO    WATCH NUMBER 280...TORNADO WATCH NUMBER 282...TORNADO WATCH    NUMBER 283. WATCH NUMBER 280 282 283 WILL NOT BE IN EFFECT AFTER    300 AM EDT. CONTINUE...WW 284...WW 285...       DISCUSSION...DEEPENING SURFACE LOW MOVING ACROSS MID ATLANTIC STATES    WITH STRONG SHEAR PROFILES REMAINING IN PLACE FOR SUPPORT OF    TORNADIC SUPERCELLS.  MOST LIKELY AREA OF SEVERE STORMS WILL REMAIN    VICINITY OF E/W BOUNDARY VICINITY VA/NC BORDER WHICH MAY SHIFT A    LITTLE NWD ERN PORTION OF WATCH.  ADDITIONAL SUPERCELL POTENTIAL    MOVING EWD ACROSS NRN NC IN WARM SECTOR GIVEN THE AVAILABLE    MOISTURE/INSTABILITY AND STRONG SHEAR.