

000 

WWUS20 KWNS 240333

SEL9

SPC WW 240333

OKZ000-TXZ000-241200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 29

NWS STORM PREDICTION CENTER NORMAN OK

925 PM CST FRI FEB 23 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN AND CENTRAL OKLAHOMA

       NORTHWEST TEXAS AND THE EASTERN TEXAS PANHANDLE



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 925 PM

UNTIL 600 AM CST.



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 95 STATUTE

MILES EAST AND WEST OF A LINE FROM 15 MILES NORTH NORTHEAST OF

ALVA OKLAHOMA TO 15 MILES WEST SOUTHWEST OF ABILENE TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU9).



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 27. WATCH NUMBER 27 WILL NOT BE IN EFFECT AFTER 925

PM CST. CONTINUE...WW 28...



DISCUSSION...TSTMS/SUPERCELLS EXPECTED TO CONTINUE DEVELOPING E OF

DRY LINE OVER THE ERN TX PANHANDLE AND NW TX...WHILE EXISTING

DRY-LINE-INDUCED STORMS NOW IN NW OK CONTINUE NEWD AND BECOME

SLIGHTLY ELEVATED.  A BIT LATER TONIGHT...ADDITIONAL

STORMS/SCATTERED CLUSTERS MAY FORM IN WRN PART OF WATCH AS COLD

FRONT NOW CROSSING THE NM/TX LINE CONTINUES EWD INTO INCREASING LOW

LEVEL MOISTURE.

AMPLE SHEAR WILL BE PRESENT FOR SUPERCELLS AS 500 MB SW FLOW

INCREASES TO AROUND 70 KTS.  MID LEVEL COOLING AND LARGE SCALE

ASCENT AHEAD OF STRONG NM UPR TROUGH MAY COMPENSATE FOR NOCTURNAL

COOLING TO SUPPORT MODEST SFC-BASED DESTABILIZATION IN WW AREA.

SOME OF THE STORMS LIKELY WILL EVOLVE INTO SHORT BANDS AFTER ABOUT

06-08Z.  THESE STRUCTURES MAY YIELD AN INCREASING THREAT FOR HIGH

WIND IN ADDITION TO ISOLATED TORNADOES.



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

450. MEAN STORM MOTION VECTOR 24045.





...CORFIDI

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