WATCHES: Severe Thunderstorm Watch Number 588

WWUS20 KWNS 162014
SEL8
SPC WW 162014
ARZ000-KSZ000-MOZ000-OKZ000-170300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 588
NWS STORM PREDICTION CENTER NORMAN OK
315 PM CDT THU JUL 16 2009

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

NORTHWEST ARKANSAS
EXTREME SOUTHEAST KANSAS
SOUTHWEST AND SOUTH CENTRAL MISSOURI
NORTHEAST OKLAHOMA

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 315 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 APPROXIMATELY ALONG AND 60
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES WEST
SOUTHWEST OF TULSA OKLAHOMA TO 25 MILES EAST SOUTHEAST OF FORT
LEONARD WOOD MISSOURI. FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).

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 587...

DISCUSSION...STORMS ARE CONTINUING TO DEVELOP AND INTENSIFY ALONG
BOUNDARY EXTENDING FROM CENTRAL MO INTO FAR NRN OK. THE AIR MASS
HAS RECOVERED FROM MORNING CONVECTION WITH A WELL-DEFINED LOW LEVEL
THERMAL/INSTABILITY AXIS NEAR THE BOUNDARY...WITH MLCAPE OF
1500-2000 J/KG. APPARENT SHORT WAVE TROUGH MOVING SEWD INTO THE
LOWER MO VALLEY REGION AND ATTENDANT 35-45 KT WNWLY MID LEVEL WINDS
ARE EXPECTED TO ENHANCE CONVECTIVE ORGANIZATION WITH POTENTIAL FOR A
FEW SEVERE STORMS THROUGH THE EVENING.

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 28030.

...WEISS

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