

205 

WWUS20 KWNS 181827

SEL7

SPC WW 181827

KSZ000-OKZ000-190000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 167

NWS STORM PREDICTION CENTER NORMAN OK

130 PM CDT SAT APR 18 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL KANSAS

       NORTHWEST OKLAHOMA



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 130 PM UNTIL

700 PM CDT.



TORNADOES...HAIL TO 3 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 55 STATUTE

MILES EAST AND WEST OF A LINE FROM 70 MILES NORTH OF DODGE CITY

KANSAS TO 70 MILES SOUTH OF ALVA OKLAHOMA.  FOR A COMPLETE

DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE

(WOUS64 KWNS WOU7).



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.



OTHER WATCH INFORMATION...CONTINUE...WW 165...WW 166...



DISCUSSION...THUNDERSTORMS HAVE BEGUN TO DEVELOP BENEATH COLD UPPER

LOW OVER SOUTHWEST KS.  DEVELOPMENT IS EXPECTED TO OCCUR SOUTHWARD

ALONG DRYLINE INTO NORTHWEST OK DURING THE NEXT FEW HOURS AS WELL.

BACKED LOW LEVEL WINDS...STEEP LAPSE RATES...AND AMBIENT VORTICITY

WILL PROMOTE A RISK OF TORNADOES IN THIS REGION.

OTHERWISE...SPLITTING SUPERCELLS CAPABLE OF VERY LARGE HAIL WILL BE

THE MAIN THREAT.



AVIATION...TORNADOES AND 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

400. MEAN STORM MOTION VECTOR 24025.





...HART

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