WATCHES: Severe Thunderstorm Watch Number 163

WWUS20 KWNS 172201
SEL3
SPC WW 172201
KSZ000-OKZ000-TXZ000-180300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 163
NWS STORM PREDICTION CENTER NORMAN OK
500 PM CDT FRI APR 17 2009

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

PARTS OF SOUTHWEST KANSAS
PARTS OF WESTERN OKLAHOMA
PARTS OF EASTERN TEXAS PANHANDLE AND NORTHWEST TEXAS

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 500 PM UNTIL
1000 PM 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 40
STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES WEST
NORTHWEST OF GARDEN CITY KANSAS TO 145 MILES SOUTH SOUTHEAST OF
CHILDRESS TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).

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.

OTHER WATCH INFORMATION...CONTINUE...WW 160...WW 161...WW 162...

DISCUSSION...THUNDERSTORMS WILL DEVELOP ALONG N/S DRY
LINE/CONVERGENCE ZONE WHERE AIR MASS HAS BECOME UNSTABLE AHEAD OF
STRONG UPPER LOW. PRIMARY THREAT WILL BE LARGE HAIL...PARTICULARLY
ASSOCIATED WITH ANY SUPERCELL THAT IS ABLE TO DEVELOP. WHILE DEEP
LAYER SHEAR IS STRONG...LOW LEVEL SHEAR SHOULD RESULT IN PRIMARY
LARGE HAIL THREAT.

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 19030.

...HALES

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