WATCHES: Tornado Watch Number 13

WWUS20 KWNS 241727
SEL3
SPC WW 241727
ARZ000-LAZ000-OKZ000-TXZ000-250000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 13
NWS STORM PREDICTION CENTER NORMAN OK
1125 AM CST THU FEB 24 2011

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

A LARGE PART OF ARKANSAS
PARTS OF NORTHERN LOUISIANA
PASTS OF SOUTHEASTERN OKLAHOMA
PARTS OF NORTHEAST TEXAS

EFFECTIVE THIS THURSDAY MORNING AND EVENING FROM 1125 AM UNTIL
600 PM CST.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 100 STATUTE
MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHWEST OF
RUSSELLVILLE ARKANSAS TO 25 MILES SOUTHEAST OF SHREVEPORT
LOUISIANA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).

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...THUNDERSTORMS ARE INCREASING IN NUMBER ACROSS ERN OK
INTO NERN TX AHEAD OF STRONG S/WV TROUGH AND DEVELOPING SURFACE LOW.
WITH AIR MASS NOW FAVORABLY UNSTABLE AND NEARLY
UNCAPPED...POTENTIAL FOR SEVERE THUNDERSTORMS INCLUDING SUPERCELLS
WILL INCREASE EWD ACROSS THE WATCH THRU THE AFTERNOON. E/W WARM
FRONT ACROSS CENTRAL AR WILL BE AN AREA FOR ENHANCED LOW LEVEL
SHEAR/SUPERCELL DEVELOPMENT. TORNADOS WILL BE POSSIBLE WITH ANY
SUPERCELL THAT DEVELOPS.

AVIATION...TORNADOES AND 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 24045.

...HALES

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