Monday, July 9, 2012

WATCHES: Severe Thunderstorm Watch Number 484...resent

WWUS20 KWNS 091925
SEL4
SPC WW 091925
NCZ000-VAZ000-WVZ000-100100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 484...RESENT
NWS STORM PREDICTION CENTER NORMAN OK
320 PM EDT MON JUL 9 2012

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

NORTHWEST NORTH CAROLINA
SOUTHWEST AND SOUTH CENTRAL VIRGINIA
EXTREME SOUTHEAST WEST VIRGINIA

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 320 PM UNTIL 900
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 70
STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH
NORTHWEST OF LYNCHBURG VIRGINIA TO 60 MILES WEST SOUTHWEST OF
DANVILLE VIRGINIA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).

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...CONTINUE...WW 483...

DISCUSSION...STORMS ARE EXPECTED TO INCREASE OVER SWRN VA THIS
AFTERNOON WITHIN A MODERATELY UNSTABLE ENVIRONMENT WITH MLCAPE OF
1500-2000 J/KG. WESTERLY MID LEVEL WINDS OF 20-30 KTS WILL PROMOTE
ORGANIZED MULTICELL STORMS AND SHORT LINE SEGMENTS...WITH POTENTIAL
TO PRODUCE PRIMARILY DAMAGING WIND GUSTS.

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 27020.


...WEISS

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