

841 

WWUS20 KWNS 101851

SEL8

SPC WW 101851

OKZ000-TXZ000-110200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 8

NWS STORM PREDICTION CENTER NORMAN OK

1250 PM CST TUE FEB 10 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHWEST OKLAHOMA

       NORTHWEST TEXAS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 1250 PM UNTIL

800 PM CST.



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 65 STATUTE

MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHWEST OF CHANDLER

OKLAHOMA TO 35 MILES SOUTHEAST OF ABILENE TEXAS.  FOR A COMPLETE

DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE

(WOUS64 KWNS WOU8).



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...CU FIELD CONTINUES TO INCREASE OVER NORTHWEST TX AND

SOUTHWEST OK...IN REGION OF RELATIVELY STRONG HEATING AND INCREASING

MOISTURE.  FORECAST SOUNDINGS SUGGEST THIS REGION IS NEAR CONVECTIVE

INITIATION.  STORMS ARE EXPECTED TO BECOME SUPERCELLULAR WITH VERY

LARGE HAIL AND ISOLATED TORNADOES POSSIBLE.  THREAT FOR STRONG

TORNADOES WILL INCREASE BY EARLY EVENING AS LOW LEVEL VERTICAL WIND

PROFILES STRENGTHEN.



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

450. MEAN STORM MOTION VECTOR 24035.





...HART

