

000 

WWUS20 KWNS 112346

SEL0

SPC WW 112346

NCZ000-120300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 310

NWS STORM PREDICTION CENTER NORMAN OK

745 PM EDT SUN MAY 11 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL NORTH CAROLINA



EFFECTIVE THIS SUNDAY EVENING FROM 745 PM UNTIL 1100 PM EDT.



HAIL TO 1.5 INCHES 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 70

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

RALEIGH NORTH CAROLINA TO 40 MILES SOUTHWEST OF FAYETTEVILLE

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

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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...THIS SEVERE THUNDERSTORM WATCH REPLACES

TORNADO WATCH NUMBER 307. WATCH NUMBER 307 WILL NOT BE IN EFFECT

AFTER 745 PM EDT. CONTINUE...WW 308...WW 309...



DISCUSSION...COMPLEX SETUP ACROSS NC THIS EVENING WITH STRONG UPPER

SYSTEM AND COLD TEMPERATURES ALOFT MAINTAINING THUNDERSTORMS

SPREADING EWD ACROSS THE STATE...DESPITE EARLIER THUNDERSTORM

ACTIVITY MOVING ACROSS ERN NC.  IN WAKE OF SURFACE LOW AND LEADING

TROUGH OVER ERN NC EARLY THIS EVENING...WLY WINDS AND DRYING SURFACE

CONDITIONS APPEAR TO HAVE LIMITED TORNADO POTENTIAL OVER CENTRAL NC.

 HOWEVER...VERY STEEP LAPSE RATES AND 35-45 KT EFFECTIVE SHEAR

SHOULD STILL SUPPORT A FEW SUPERCELLS/ORGANIZED CLUSTERS WITH

PRIMARY THREATS OF LARGE HAIL AND ISOLATED DAMAGING WINDS FOR A FEW

MORE HOURS.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM

MOTION VECTOR 27035.





...EVANS

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