WATCHES: Tornado Watch Number 805

WWUS20 KWNS 232005
SEL5
SPC WW 232005
ARZ000-LAZ000-OKZ000-TXZ000-240300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 805
NWS STORM PREDICTION CENTER NORMAN OK
200 PM CST WED DEC 23 2009

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

FAR SOUTHWEST ARKANSAS
WESTERN LOUISIANA
SOUTHEAST OKLAHOMA
EASTERN AND SOUTHEAST TEXAS

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 200 PM UNTIL
900 PM CST.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 125 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 55 MILES WEST NORTHWEST OF
TYLER TEXAS TO 55 MILES SOUTH SOUTHEAST OF SHREVEPORT LOUISIANA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU5).

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...TSTMS NOW FORMING ALONG LOW LVL CONFLUENCE ZONE AND
NW/SE WARM FRONT OVER E TX/SE OK AND THE SABINE RVR
VLY...RESPECTIVELY... EXPECTED TO GRADUALLY INCREASE IN
COVERAGE/STRENGTH THROUGH LATE TONIGHT AS REGION CONTINUES TO
MOISTEN AND LARGE SCALE ASCENT STRENGTHENS WITH THE APPROACH OF NM
UPR TROUGH. ABSENCE OF STRONG LINEAR FORCING AND GRADUALLY
INCREASING SHEAR /BOTH NEAR-SFC AND DEEP/ SUGGEST LIKELIHOOD FOR A
FEW SUPERCELLS WITH THE POTENTIAL FOR TORNADOES...IN ADDITION TO
LOCALLY DMGG WIND/ MARGINALLY SVR HAIL.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.
MEAN STORM MOTION VECTOR 22040.

...CORFIDI

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