

802 

WWUS20 KWNS 121942

SEL5

SPC WW 121942

KSZ000-OKZ000-TXZ000-130300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 155

NWS STORM PREDICTION CENTER NORMAN OK

245 PM CDT WED MAY 12 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTH CENTRAL AND EASTERN KANSAS

       WESTERN OKLAHOMA

       WESTERN NORTH TEXAS



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 245 PM UNTIL

1000 PM CDT.



TORNADOES...HAIL TO 2.5 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 95 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 10 MILES NORTHEAST OF TOPEKA

KANSAS TO 45 MILES WEST SOUTHWEST OF ALTUS OKLAHOMA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU5).



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 154...



DISCUSSION...ISOLATED THUNDERSTORMS ARE EXPECTED TO INTENSIFY ALONG

THE SURFACE FRONT OVER SOUTH CENTRAL AND EASTERN KS...AND ALONG THE

DRYLINE OVER WESTERN OK THIS AFTERNOON AND EVENING.  AIRMASS IS VERY

UNSTABLE WITH SUFFICIENT VERTICAL SHEAR TO PROMOTE SUPERCELLS

CAPABLE OF VERY LARGE HAIL AND ISOLATED TORNADOES.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

550. MEAN STORM MOTION VECTOR 24035.





...HART

