Svr T-Storm Watch for OK,AR,SW MO

[wx247]

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 133
NWS STORM PREDICTION CENTER NORMAN OK
440 PM CDT FRI APR 30 2004

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

NORTHWEST ARKANSAS
SOUTHWEST MISSOURI
CENTRAL AND EASTERN OKLAHOMA

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 440 PM UNTIL 1000
PM CDT.

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

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 65 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 30 MILES NORTHWEST OF ARDMORE
OKLAHOMA TO 5 MILES SOUTH SOUTHEAST OF HARRISON ARKANSAS.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 132...

DISCUSSION...SCATTERED STRONG/SEVERE THUNDERSTORMS ARE EXPECTED TO
DEVELOP ACROSS EASTERN OK DURING THE NEXT 1-2 HOURS...SPREADING
EASTWARD INTO PARTS OF SOUTHWEST MO AND NORTHWEST AR DURING THE
EVENING. AMPLE LOW LEVEL MOISTURE/INSTABILITY...COUPLED WITH
SUFFICIENT VERTICAL SHEAR AND STEEP LAPSE RATES...WILL POSE A RISK
OF LARGE HAIL AND DAMAGING WINDS.

AVIATION...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 550. MEAN STORM
MOTION VECTOR 25035.


...HART