

102 

WWUS20 KWNS 210054

SEL7

SPC WW 210054

KSZ000-210400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 487

NWS STORM PREDICTION CENTER NORMAN OK

755 PM CDT SAT JUN 20 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       A SMALL PART OF CENTRAL AND NORTHEAST KANSAS



EFFECTIVE THIS SATURDAY EVENING FROM 755 PM UNTIL 1100 PM CDT.



TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 40 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 20 MILES SOUTHWEST OF SALINA

KANSAS TO 25 MILES SOUTHEAST OF MANHATTAN KANSAS.  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.



DISCUSSION...A SMALL MCV AND AN ASSOCIATED THUNDERSTORM CLUSTER HAS

INTENSIFIED IN THE PAST 1-2 HOURS.  THE STORMS ON THE E FLANK OF THE

CLUSTER WILL CONTINUE TO INTERACT WITH THE SURFACE WARM

FRONT...WHERE LOW-LEVEL SHEAR IS STRONGEST AND BOUNDARY LAYER DEW

POINTS ARE IN THE LOW 70S.  DESPITE POOR MID LEVEL LAPSE

RATES...VERTICAL SHEAR AND MOISTURE PROFILES COULD SUSTAIN A TORNADO

AND WIND DAMAGE THREAT IN A NARROW CORRIDOR FOR THE NEXT FEW HOURS.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 23025.





...THOMPSON

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