Friday, April 8, 2011

WATCHES: Severe Thunderstorm Watch Number 107

WWUS20 KWNS 082216
SEL7
SPC WW 082216
NCZ000-TNZ000-VAZ000-WVZ000-090400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 107
NWS STORM PREDICTION CENTER NORMAN OK
615 PM EDT FRI APR 8 2011

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

NORTHWESTERN NORTH CAROLINA
EAST TENNESSEE
SOUTHWEST VIRGINIA
FAR SOUTHERN WEST VIRGINIA

EFFECTIVE THIS FRIDAY NIGHT FROM 615 PM UNTIL MIDNIGHT 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 40
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES SOUTH
SOUTHEAST OF DUBLIN VIRGINIA TO 40 MILES NORTH NORTHWEST OF
KNOXVILLE TENNESSEE. 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.

OTHER WATCH INFORMATION...CONTINUE...WW 106...

DISCUSSION...WDLY SCTD SUSTAINED STORMS/SUPERCELLS EXPECTED TO
MOVE/DEVELOP ESE INTO WW REGION THROUGH LATER THIS EVE AS CONFLUENT
LOW-LVL WSWLY UPSLOPE FLOW PERSISTS BENEATH WRN PART OF ASCENT BAND
ASSOCIATED WITH CNTRL APPALACHIANS UPR IMPULSE. ACTIVITY MAY
COALESCE INTO SMALL CLUSTERS OR BANDS...WITH A POTENTIAL FOR A FEW
SPOTS OF LOCALLY DMMG WIND.

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 500. MEAN STORM
MOTION VECTOR 29030.


...CORFIDI

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