SEL9
SPC WW 101825
NCZ000-VAZ000-110100-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 49
NWS STORM PREDICTION CENTER NORMAN OK
125 PM EST THU MAR 10 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
LARGE PART OF CENTRAL AND EASTERN NORTH CAROLINA
A LARGE PART OF CENTRAL AND SOUTHERN VIRGINIA
EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 125 PM UNTIL
800 PM EST.
HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65
STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH OF
CHARLOTTESVILLE VIRGINIA TO 10 MILES SOUTH SOUTHWEST OF
FAYETTEVILLE NORTH CAROLINA. FOR A COMPLETE DEPICTION OF THE
WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.
DISCUSSION...AS STRONG UPPER TROUGH APPROACHES AREA FROM THE
SW...AIR MASS HAS BECOME SUFFICIENTLY UNSTABLE TO SUPPORT
THUNDERSTORMS. WITH 50-60KT BRN SHEAR...THUNDERSTORMS WILL DEVELOP
INTO SHORT LINE SEGMENTS/BOWS AS THEY MOVE RAPIDLY NEWD. PRIMARY
THREAT WILL BE DAMAGING WINDS...HOWEVER A BRIEF TORNADO OR TWO IS
POSSIBLE GIVEN THE STRONG LOW LEVEL SHEAR.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM MOTION
VECTOR 22035.
...HALES
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