WATCHES: Severe Thunderstorm Watch Number 69

WWUS20 KWNS 310149
SEL9
SPC WW 310149
ARZ000-OKZ000-310900-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 69
NWS STORM PREDICTION CENTER NORMAN OK
850 PM CDT SAT MAR 30 2013

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

NORTHWEST ARKANSAS
EASTERN OKLAHOMA

EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 850 PM
UNTIL 400 AM 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 APPROXIMATELY ALONG AND 70
STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES SOUTH
SOUTHEAST OF MCALESTER OKLAHOMA TO 35 MILES NORTH NORTHWEST OF
FAYETTEVILLE ARKANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).

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 66...WW 68...

DISCUSSION...TSTMS HAVE RECENTLY INCREASED IN COVERAGE AND INTENSITY
NEAR AND N OF TULSA IN ADVANCE OF A COLD FRONT SETTLING SWD THROUGH
NRN OK. AMBIENT AIR MASS REMAINS RELATIVELY WARM AND MOIST WITH
MLCAPE ESTIMATED AROUND 1000 J/KG. MOREOVER...THE TULSA VAD HAS
SHOW A STEADY STRENGTHENING OF SLY WINDS BELOW 1 KM WHICH IS
RESULTING IN AN ENLARGED HODOGRAPH WITH MORE THAN SUFFICIENT SHEAR
FOR SUPERCELLS. WHILE A BRIEF TORNADO IS POSSIBLE...LARGE HAIL AND
DAMAGING WINDS WILL BE THE PRIMARY HAZARDS AS STORMS SPREAD SEWD
ACROSS THE WATCH AREA.

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 500. MEAN STORM
MOTION VECTOR 31025.


...MEAD

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
To unsubscribe from WX-STORM send e-mail to LISTSERV@LISTSERV.ILLINOIS.EDU with
"unsub wx-storm" in the body of your message. For more information write cnovy@cox.net.