WATCHES: Severe Thunderstorm Watch Number 597

WWUS20 KWNS 172004
SEL7
SPC WW 172004
KSZ000-NMZ000-OKZ000-TXZ000-180300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 597
NWS STORM PREDICTION CENTER NORMAN OK
300 PM CDT FRI JUL 17 2009

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

SOUTHWESTERN KANSAS
NORTHEASTERN NEW MEXICO
OKLAHOMA PANHANDLE
TEXAS PANHANDLE

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 300 PM UNTIL
1000 PM CDT.

HAIL TO 3 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 75
STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH
NORTHWEST OF GARDEN CITY KANSAS TO 55 MILES WEST SOUTHWEST OF
AMARILLO TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).

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 592...WW 593...WW
594...WW 595...WW 596...

DISCUSSION...SUPERCELLS IN NWRN KS ARE EXPECTED TO MOVE SWD AND
EVENTUALLY EVOLVE INTO A FORWARDING PROPAGATING MCS. OTHER STORMS
HAVE ALSO MOVED OFF THE HIGHER TERRAIN IN NERN NM. STRONGLY VEERING
WIND PROFILES AND MODERATE TO STRONG INSTABILITY WILL SUPPORT MAINLY
A LARGE HAIL THREAT WITH THESE DISCRETE STORMS...BUT AS THE STORMS
EVOLVE INTO A LINEAR SYSTEM...WIND DAMAGE WILL BECOME THE PRIMARY
THREAT.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 36025.

...IMY

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