WATCHES: Tornado Watch Number 332

WWUS20 KWNS 011729
SEL2
SPC WW 011729
MDZ000-NCZ000-PAZ000-VAZ000-WVZ000-020100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 332
NWS STORM PREDICTION CENTER NORMAN OK
130 PM EDT FRI JUN 1 2012

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

MARYLAND
NORTHWEST NORTH CAROLINA
SOUTH-CENTRAL PENNSYLVANIA
WESTERN AND NORTHERN VIRGINIA
EASTERN WEST VIRGINIA PANHANDLE

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 130 PM UNTIL 900
PM EDT.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHEAST OF ALTOONA
PENNSYLVANIA TO 40 MILES WEST OF GREENSBORO NORTH CAROLINA. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU2).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

DISCUSSION...STRONG FORCED ASCENT WITH A LARGE SCALE TROUGH WAS
LIKELY CONTRIBUTING TO AN INCREASE IN LOW-TOPPED CONVECTION ALONG A
COLD FRONT NOW SITUATED FROM ERN OH SWD ACROSS WV...EXTREME SWRN VA
AND ERN TN. EXPECT THAT THIS CONVECTION WILL CROSS THE SPINE OF THE
APPALACHIANS OVER THE NEXT 2 HOURS. AS THE FRONT BEGINS TO INTERACT
WITH GREATER INSTABILITY EAST OF THE MOUNTAINS...MORE VIGOROUS
STORM DEVELOPMENT IN THE FORM OF BOWING/LEWPING LINE SEGMENTS CAN BE
EXPECTED. A WEAK FRONTAL WAVE MAY ALSO TAKE FORM WITH TIME
COINCIDENT WITH AN INCREASE IN STORMS ALONG A WARM FRONT EXTENDING
ACROSS SRN PA AND INTO THE DELMARVA REGION. IN ADDITION TO WIND
DAMAGE AND SOME HAIL THREAT WITH THE STORMS ALONG THE ADVANCING
FRONT...AN ENHANCED BUT FOCUSED TORNADO THREAT MAY EVOLVE NEAR THE
FRONTAL WAVE AND WARM FRONT.

AVIATION...TORNADOES AND 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 22035.


...CARBIN

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