WATCHES: Severe Thunderstorm Watch Number 749

WWUS20 KWNS 282150
SEL9
SPC WW 282150
NCZ000-VAZ000-CWZ000-290200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 749
NWS STORM PREDICTION CENTER NORMAN OK
550 PM EDT MON SEP 28 2009

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

NORTHERN AND CENTRAL NORTH CAROLINA
SOUTHEASTERN VIRGINIA
COASTAL WATERS

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 550 PM UNTIL
1000 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 75
STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTHEAST OF
NORFOLK VIRGINIA TO 65 MILES WEST SOUTHWEST OF RALEIGH NORTH
CAROLINA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).

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...TSTMS THAT FORMED IN THE PAST 90 MIN ALONG COLD FRONT
OVER THE SRN VA/NRN NC PIEDMONT EXPECTED TO REMAIN STG/SVR FOR THE
NEXT FEW HRS AS THEY CROSS LOW LVL WARMTH/MOISTURE AXIS. WHILE
MODEST MID LVL LAPSE RATES WILL PERSIST...FORCING/STG WIND FIELD
ASSOCIATED WITH GLANCING INFLUENCE OF GRT LKS SHORTWAVE TROUGH
SUGGEST POTENTIAL FOR SUSTAINED STORMS/SUPERCELLS WITH A THREAT FOR
LOCALLY DMGG WIND...SVR HAIL...AND POSSIBLY A BRIEF TORNADO UNTIL
AFTER SUNSET.

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 450. MEAN STORM
MOTION VECTOR 26040.

...CORFIDI

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