WATCHES: Severe Thunderstorm Watch Number 544

WWUS20 KWNS 152339
SEL4
SPC WW 152339
ARZ000-OKZ000-160500-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 544
NWS STORM PREDICTION CENTER NORMAN OK
640 PM CDT SUN JUN 15 2008

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

NORTHWEST AND NORTH CENTRAL ARKANSAS
NORTHEAST OKLAHOMA

EFFECTIVE THIS SUNDAY NIGHT FROM 640 PM UNTIL MIDNIGHT 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 55
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES NORTH
NORTHWEST OF MUSKOGEE OKLAHOMA TO 15 MILES EAST OF BATESVILLE
ARKANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).

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 540...WW 541...WW
542...WW 543...

DISCUSSION...STRONG/SEVERE THUNDERSTORMS OVER SERN KS AND SWRN/SOUTH
CENTRAL MO ARE EXPECTED TO SPREAD SEWD THIS EVENING AS AGGREGATE
COLD POOL ASSOCIATED WITH STORMS IN MO PROPAGATES INTO AR...AND KS
STORMS SPREAD SEWD WITHIN NWLY FLOW ALOFT. AIR MASS IS VERY
UNSTABLE WITH MLCAPE OF 2000-3500 J/KG...AND 30-40 KT DEEP LAYER
SHEAR WILL ENHANCE POTENTIAL FOR SEVERE STORMS TO PERSIST.

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 28020.

...WEISS

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