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347 

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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