

000 

WWUS20 KWNS 300057

SEL6

SPC WW 300057

NCZ000-SCZ000-300800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 646

NWS STORM PREDICTION CENTER NORMAN OK

855 PM EDT SUN JUN 29 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN AND CENTRAL NORTH CAROLINA

       WESTERN AND CENTRAL SOUTH CAROLINA



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 855 PM UNTIL

400 AM 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 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES EAST OF

ROCKY MOUNT NORTH CAROLINA TO 45 MILES SOUTH OF SPARTANBURG SOUTH

CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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

SEVERE THUNDERSTORM WATCH NUMBER 640. WATCH NUMBER 640 WILL NOT

BE IN EFFECT AFTER 855 PM EDT. CONTINUE...WW 641...WW 643...WW

644...WW 645...



DISCUSSION...CLUSTERS OF STRONG TO SVR STORMS EXPECTED TO PERSIST

OVER THE SC/NC PIEDMONT THROUGH LATE EVENING AS LARGE SCALE ASCENT

INCREASES DOWNSTREAM FROM UPR IMPULSE NOW OVER THE AL/MS BORDER.

MODERATE DEEP WLY FLOW AND STEEP LOW LVL LAPSE RATES MAY SUPPORT

BOWING SEGMENTS WITH HIGH WIND AND MARGINALLY SVR HAIL DESPITE LOSS

OF SFC HEATING.



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 500. MEAN STORM

MOTION VECTOR 25025.





...CORFIDI

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