STORM2K

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 120
STORM PREDICTION CENTER NORMAN OK
500 PM CDT TUE APR 15 2003

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

SOUTHWEST OKLAHOMA
WESTERN AND NORTHWESTERN TEXAS

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 500 PM UNTIL 1100
PM CDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 80 STATUTE MILES EAST AND WEST
OF A LINE FROM 25 MILES SOUTH SOUTHWEST OF SAN ANGELO TEXAS TO 30
MILES NORTHWEST OF ALTUS OKLAHOMA.

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 118...WW 119...

DISCUSSION...IMPRESSIVE PRESSURE FALLS ARE OCCURING OVER WRN TX
AHEAD OF APPROACHING UPPER TROUGH AT 21Z...INDICATING SIGNIFICANT
LARGE SCALE ASCENT WILL OVERSPREAD WW THROUGH THE EVENING.
ACTIVITY WILL LIKELY INCREASE IN COVERAGE/INTENSITY OVER THE NEXT
HOUR OR SO AND SPREAD QUICKLY EWD IN THE FORM OF SUPERCELLS AND
SMALL SCALE BOW ECHOES. WITH BACKED LOW LEVEL FLOW...THE THREAT
FOR ISOLATED TORNADOES WILL ALSO INCREASE...ESPECIALLY INTO NWRN
TX/SWRN OK.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 25040.