

178 

WWUS20 KWNS 260342

SEL6

SPC WW 260342

KSZ000-OKZ000-260800-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 186

NWS STORM PREDICTION CENTER NORMAN OK

1040 PM CDT SAT APR 25 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTH-CENTRAL AND SOUTHEASTERN KANSAS

       NORTHERN OKLAHOMA



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 1040 PM

UNTIL 300 AM CDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 45 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 30 MILES SOUTHEAST OF

CHANUTE KANSAS TO 50 MILES SOUTHWEST OF ALVA OKLAHOMA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU6).



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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 183. WATCH NUMBER 183 WILL NOT BE IN EFFECT AFTER

1040 PM CDT. CONTINUE...WW 185...



DISCUSSION...ENVIRONMENT WILL BE CHARACTERIZED BY LARGE LOW LEVEL

HODOGRAPHS/SRH AND PRESENCE OF ROTATING UPDRAFTS ABOVE FAVORABLE

BOUNDARY LAYER THETAE.  TORNADO POTENTIAL EXPECTED TO CONTINUE FOR A

FEW MORE HOURS UNTIL AIR MASS STABILIZES TOO MUCH FOR SFC-BASED

EFFECTIVE INFLOW PARCELS...INVOF SFC BAROCLINIC ZONE.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 24025.





...EDWARDS/EVANS

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