

000 

WWUS20 KWNS 282154

SEL4

SPC WW 282154

OKZ000-TXZ000-290500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 84

NWS STORM PREDICTION CENTER NORMAN OK

455 PM CDT WED MAR 28 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN OKLAHOMA

       PARTS OF NORTHWEST TEXAS



EFFECTIVE THIS WEDNESDAY AFTERNOON FROM 455 PM UNTIL MIDNIGHT 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 60 STATUTE

MILES EAST AND WEST OF A LINE FROM 20 MILES NORTHWEST OF ALVA

OKLAHOMA TO 45 MILES SOUTHWEST OF WICHITA FALLS TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU4).



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 80...WW 81...WW 82...WW

83...



DISCUSSION...STORMS ARE DEVELOPING RAPIDLY ACROSS TX PANHANDLE E OF

DRY LINE.  WITH AXIS OF VERY UNSTABLE AIR AND VERY FAVORABLE SHEAR

ENVIRONMENT ALONG WRN OK/TX BORDER...SUPERCELLS EXPECTED TO DEVELOP

NEWD ACROSS WATCH AREA THROUGH THE EVENING.  POTENTIAL FOR STRONG

TORNADOES ALONG WITH VERY LARGE HAIL WITH ANY SUPERCELL.



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 22035.





...HALES

