Severe Local Storm Watch and Watch Cancellation 01:05:25.8007

THE UNIVERSITY OF TEXAS AT TYLER
University Operations Center (UOC)

This is an automatically generated special information alert from the UT Tyler Office of Emergency Management:

WWUS20 KWNS 110707
SEL5
SPC WW 110707
ARZ000-LAZ000-MSZ000-TXZ000-111200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 15
NWS STORM PREDICTION CENTER NORMAN OK
105 AM CST WED FEB 11 2009

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

SOUTHEAST ARKANSAS
CENTRAL AND NORTHERN LOUISIANA
EXTREME WEST CENTRAL MISSISSIPPI
EXTREME SOUTHEAST TEXAS

EFFECTIVE THIS WEDNESDAY MORNING FROM 105 AM UNTIL 600 AM 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 70 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH NORTHEAST OF
MONTICELLO ARKANSAS TO 35 MILES SOUTHWEST OF FORT POLK 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.

OTHER WATCH INFORMATION...CONTINUE...WW 12...WW 13...WW 14...

DISCUSSION...STRONGLY FORCED SQUALL LINE WILL CONTINUE EWD FROM TX
ACROSS LA/SRN AR TO NEAR THE MS RIVER BY 11-12Z...AS AN INTENSE MID
LEVEL TROUGH OVER CENTRAL TX EJECTS ENEWD. AN INFLUX OF LOW-MID 60S
DEWPOINTS AND SBCAPE VALUES NEAR 500 J/KG WILL BE MAINTAINED BY A
60-70 KT SLY LLJ...AND THIS LLJ WILL ALSO CONTRIBUTE TO VERY STRONG
LOW-LEVEL SHEAR AND THE POTENTIAL FOR EMBEDDED
CIRCULATIONS/TORNADOES WITHIN THE LINE. OTHERWISE...DAMAGING WINDS
WILL BE THE PRIMARY SEVERE THREAT THROUGH THE EARLY MORNING HOURS.

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 500.
MEAN STORM MOTION VECTOR 26040.

...THOMPSON

P. Low/UOC
END OF ALERT