WATCHES: Tornado Watch Number 10

WWUS20 KWNS 102140
SEL0
SPC WW 102140
ARZ000-OKZ000-TXZ000-110600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 10
NWS STORM PREDICTION CENTER NORMAN OK
340 PM CST TUE FEB 10 2009

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

FAR SOUTHWEST ARKANSAS
MCCURTAIN COUNTY OKLAHOMA
CENTRAL INTO NORTHEAST TEXAS

EFFECTIVE THIS TUESDAY AFTERNOON FROM 340 PM UNTIL MIDNIGHT CST.

TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 20 MILES WEST OF
STEPHENVILLE TEXAS TO 20 MILES SOUTH OF TEXARKANA ARKANSAS. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU0).

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.

OTHER WATCH INFORMATION...CONTINUE...WW 8...WW 9...

DISCUSSION...SEVERE THUNDERSTORM THREAT WILL CONTINUE TO INCREASE
ACROSS WW THROUGH THE EVENING AHEAD OF INTENSE UPPER SYSTEM NOW
EJECTING ACROSS THE SRN HIGH PLAINS. ASSOCIATED LLJ WILL INTENSIFY
AND INCREASE SHEAR OVER THE NEXT FEW HOURS. ISOLATED
SUPERCELLS...AND POSSIBLE TORNADOES...MAY EVOLVE FROM PERSISTENT
TSTMS OVER NERN TX THIS EVENING WELL AHEAD OF MAIN UPPER SYSTEM.
MORE WIDESPREAD/ LIKELY SEVERE THUNDERSTORM DEVELOPMENT...INCLUDING
TORNADIC SUPERCELLS AND FAST MOVING BOW ECHOES...IS EXPECTED DURING
THE MID TO LATE EVENING SPREADING ENEWD ACROSS WW THROUGH TONIGHT.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 24040.

...EVANS

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