WATCHES: Severe Thunderstorm Watch Number 197

WWUS20 KWNS 271602
SEL7
SPC WW 271602
MDZ000-NCZ000-VAZ000-CWZ000-272300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 197
NWS STORM PREDICTION CENTER NORMAN OK
1200 PM EDT FRI APR 27 2007

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

EASTERN SHORE OF MARYLAND
EASTERN NORTH CAROLINA
SOUTHEAST VIRGINIA
COASTAL WATERS

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM NOON UNTIL 700
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 80
STATUTE MILES EAST AND WEST OF A LINE FROM 10 MILES NORTH
NORTHWEST OF WALLOPS VIRGINIA TO 25 MILES WEST OF JACKSONVILLE
NORTH CAROLINA. 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...SCATTERED THUNDERSTORMS WILL LIKELY INCREASE IN
COVERAGE/INTENSITY THIS AFTERNOON AS THE LOW LEVELS DESTABILIZE AND
A WEAK SHORTWAVE TROUGH APPROACHES NC/VA FROM SC. THE COMBINATION
OF MODERATE INSTABILITY AND LARGELY UNIDIRECTIONAL WIND PROFILES
WILL SUPPORT BOTH BOWING SEGMENTS AND MORE ISOLATED SUPERCELLS.
DAMAGING WINDS SHOULD BE THE MAIN SEVERE THREAT...WHILE LARGE HAIL
WILL ALSO BE POSSIBLE WITH THE STRONGEST STORMS.

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 24035.

..THOMPSON

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