

835 

WWUS20 KWNS 271659

SEL7

SPC WW 271659

NCZ000-VAZ000-CWZ000-280000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 627

NWS STORM PREDICTION CENTER NORMAN OK

1250 PM EDT MON JUL 27 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN NORTH CAROLINA

       SOUTHEASTERN VIRGINIA

       COASTAL WATERS



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 1250 PM UNTIL

800 PM EDT.



HAIL TO 2 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 75

STATUTE MILES EITHER SIDE OF A LINE FROM 40 MILES SOUTH SOUTHWEST

OF FAYETTEVILLE NORTH CAROLINA TO 40 MILES NORTH OF NORFOLK

VIRGINIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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.



DISCUSSION...STORMS HAVE RECENTLY DEVELOPED ALONG THE SEA BREEZE AND

OTHER STORMS ARE ALSO ANTICIPATED AS AN UPPER WAVE MOVES EWD ACROSS

VA... AND ANOTHER SHIFTS NEWD ACROSS ERN NC. AIR MASS IS VERY MOIST

AND HEATING HAS RESULTED IN STRONG INSTABILITY. THIS INSTABILITY

COMBINED WITH EFFECTIVE SHEAR AT 30-40 KT WILL BE FAVORABLE FOR

SEVERE STORMS...INCLUDING A FEW SUPERCELLS. THE STRONG INSTABILITY

WILL SUPPORT STRONG UPDRAFTS AND HAIL...WHILE THE MOIST AND HOT AIR

MASS ALSO FAVORS DAMAGING WIND GUSTS.



AVIATION...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 550. MEAN STORM

MOTION VECTOR 27020.





...IMY

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