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000 

WWUS20 KWNS 241624

SEL3

SPC WW 241624

OKZ000-TXZ000-250100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 173

NWS STORM PREDICTION CENTER NORMAN OK

1125 AM CDT TUE APR 24 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       A LARGE PART OF OKLAHOMA

       WESTERN NORTH TEXAS



EFFECTIVE THIS TUESDAY MORNING AND EVENING FROM 1125 AM UNTIL 800

PM CDT.



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 80 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHWEST OF PONCA

CITY OKLAHOMA TO 35 MILES SOUTHWEST OF ARDMORE OKLAHOMA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU3).



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 172...



DISCUSSION...TSTMS/SUPERCELLS EXPECTED TO FORM/INTENSIFY ALONG

MERGING PACIFIC FRONT/DRY LINE.  INITIAL ACTIVITY MAY BE SLIGHTLY

ELEVATED ABOVE FRONTAL SURFACE.  BUT COMBINATION OF SFC

HEATING...STRENGTHENING DEEP SHEAR WITH CONTINUED ENE MOTION OF FAR

W TX UPR DISTURBANCE AND QUALITY MOISTURE INFLOW SUGGEST HIGH

LIKELIHOOD FOR VERY LARGE HAIL...A FEW TORNADOES AND DAMAGING WIND.



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

550. MEAN STORM MOTION VECTOR 22045.





...CORFIDI

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