

000 

WWUS20 KWNS 312023

SEL5

SPC WW 312023

NCZ000-VAZ000-CWZ000-010100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 405

NWS STORM PREDICTION CENTER NORMAN OK

425 PM EDT SAT MAY 31 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN NORTH CAROLINA

       SOUTHERN VIRGINIA

       COASTAL WATERS



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 425 PM UNTIL

900 PM 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 45 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 10 MILES NORTHWEST OF

DANVILLE VIRGINIA TO 45 MILES EAST NORTHEAST OF ELIZABETH CITY

NORTH CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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...CONTINUE...WW 402...WW 403...WW 404...



DISCUSSION...ISOLATED SEVERE STORMS...INCLUDING SUPERCELLS AND SMALL

LINES...ARE EXPECTED TO DEVELOP ESEWD ACROSS WW THIS EVENING AS AREA

REMAINS ON FRINGE OF MID LEVEL HEIGHT FALLS.  STRONG INSTABILITY AND

EFFECTIVE SHEAR FROM 40-50 KT SHOULD BE MORE THAN ADEQUATE FOR

ROTATING STORMS AND THE POSSIBILITY OF ISOLATED TORNADOES.

OTHERWISE...LARGE HAIL AND DAMAGING WINDS WILL REMAIN LIKELY WITH

THE MORE INTENSE CORES.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 27025.





...EVANS

