

155 

WWUS20 KWNS 242149

SEL0

SPC WW 242149

NCZ000-VAZ000-CWZ000-250300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 440

NWS STORM PREDICTION CENTER NORMAN OK

550 PM EDT THU JUL 24 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHEASTERN NORTH CAROLINA

  SOUTHEASTERN VIRGINIA

  COASTAL WATERS



* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 550 PM UNTIL

  1100 PM EDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A TORNADO OR TWO POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES SOUTH OF

ROANOKE RAPIDS NORTH CAROLINA TO 40 MILES WEST NORTHWEST OF

NORFOLK VIRGINIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 439...



DISCUSSION...SVR TSTM POTENTIAL IS EXPECTED TO PEAK IN NEXT COUPLE

HOURS WITH ONGOING ACTIVITY MOVING SEWD NEAR...AND BEING ENHANCED BY

CONVERGENCE INVOF...OUTFLOW BOUNDARIES OVER WW AREA.  AMPLE

LOW-LEVEL MOISTURE WILL REMAIN JUXTAPOSED WITH LARGE-SCALE ASCENT

PRECEDING MID/UPPER WAVE AND AT LEAST MRGL SHEAR IN PRECONVECTIVE

ENVIRONMENT...BEFORE NOCTURNAL COOLING AND ADDITIONAL OUTFLOW

COLLECTIVELY STABILIZE AIR MASS.



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 500. MEAN STORM MOTION

VECTOR 29025.





...EDWARDS

