679 WWUS20 KWNS 070943 SEL5 SPC WW 070943 NCZ000-VAZ000-CWZ000-071700- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 285 NWS STORM PREDICTION CENTER NORMAN OK 540 AM EDT FRI JUN 7 2013 THE NWS STORM PREDICTION CENTER HAS ISSUED A * TORNADO WATCH FOR PORTIONS OF EASTERN NORTH CAROLINA SOUTHEASTERN VIRGINIA COASTAL WATERS * EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 540 AM UNTIL 100 PM EDT. * PRIMARY THREATS INCLUDE... SEVERAL TORNADOES POSSIBLE SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES EAST NORTHEAST OF NORFOLK VIRGINIA TO 20 MILES SOUTH SOUTHEAST OF JACKSONVILLE NORTH CAROLINA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5). PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. && DISCUSSION...STRENGTHENING LOW-LEVEL SHEAR ON THE SOUTHERN FRINGE OF AN INITIAL CLUSTER OF STORMS DEVELOPING NORTHEASTWARD ACROSS EASTERN NORTH CAROLINA...COUPLED WITH INLAND DESTABILIZATION...IS BEGINNING TO SUPPORT SUSTAINED LOW-LEVEL MESOCYCLONES WITH CELLS OVER INLAND AREAS. THIS ACTIVITY PROBABLY WILL SPREAD ACROSS THE REMAINDER OF EASTERN NORTH CAROLINA AND THE OUTER BANKS EARLY THIS MORNING WITH THE RISK FOR ADDITIONAL TORNADOES. AT THE SAME TIME...AFTER DAYBREAK...SURFACE HEATING OF THE MOIST BOUNDARY LAYER IN THE WAKE OF THIS ACTIVITY WILL CONTRIBUTE TO SUFFICIENT DESTABILIZATION FOR ADDITIONAL DISCRETE STORMS AHEAD OF THE REMNANTS OF ANDREA AS IT ACCELERATES NORTHEASTWARD TOWARD THE MID ATLANTIC COAST. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM MOTION VECTOR 19035. ...KERR ====================================================================== 678 WWUS40 KWNS 070943 WWP5 TORNADO WATCH PROBABILITIES FOR WT 0285 NWS STORM PREDICTION CENTER NORMAN OK 0436 AM CDT FRI JUN 07 2013 WT 0285 PROBABILITY TABLE: PROB OF 2 OR MORE TORNADOES : 50% PROB OF 1 OR MORE STRONG /F2-F5/ TORNADOES : 20% PROB OF 10 OR MORE SEVERE WIND EVENTS : 30% PROB OF 1 OR MORE WIND EVENTS >= 65 KNOTS : 10% PROB OF 10 OR MORE SEVERE HAIL EVENTS : 10% PROB OF 1 OR MORE HAIL EVENTS >= 2 INCHES :
Posted on: Fri, 07 Jun 2013 09:52:27 +0000
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