WATCHES: Severe Thunderstorm Watch Number 122

WWUS20 KWNS 110448
SEL2
SPC WW 110448
ARZ000-111100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 122
NWS STORM PREDICTION CENTER NORMAN OK
1150 PM CDT TUE APR 10 2007

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

CENTRAL AND SOUTHERN ARKANSAS

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1150 PM
UNTIL 600 AM CDT.

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 45
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 60 MILES WEST OF HOT
SPRINGS ARKANSAS TO 55 MILES EAST NORTHEAST OF PINE BLUFF
ARKANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).

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.

DISCUSSION...ELEVATED THUNDERSTORMS...INCLUDING SUPERCELLS...WILL
LIKELY PERSIST AND EVEN INCREASE IN COVERAGE ACROSS AR THE NEXT FEW
HOURS AS A MID LEVEL TROUGH MOVES EWD FROM OK. A FEED OF SOMEWHAT
GREATER MOISTURE/INSTABILITY FROM LA INTO SRN/ERN AR OVERNIGHT MAY
SUPPORT INTENSIFICATION OF THE CONVECTION N OF THE SURFACE WARM
FRONT...WHERE EFFECTIVE BULK SHEAR REMAINS SUFFICIENT FOR
SUPERCELLS. LARGE HAIL WILL BE THE PRIMARY SEVERE THREAT...THOUGH
THERE MAY BE SOME TENDENCY FOR AN INCREASING WIND DAMAGE THREAT
LATER TONIGHT.

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 450. MEAN STORM
MOTION VECTOR 28045.

..THOMPSON

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