WATCHES: Severe Thunderstorm Watch Number 528

WWUS20 KWNS 272142
SEL8
SPC WW 272142
KSZ000-OKZ000-280300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 528
NWS STORM PREDICTION CENTER NORMAN OK
440 PM CDT SAT JUN 27 2009

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

PARTS OF SOUTHEAST KANSAS
PARTS OF NORTH AND WEST OKLAHOMA

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

HAIL TO 1.5 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 40
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTH
SOUTHWEST OF GAGE OKLAHOMA TO 20 MILES EAST NORTHEAST OF CHANUTE
KANSAS. 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 525...WW 526...WW 527...

DISCUSSION...WEAK FRONTAL ZONE STRETCHES FROM ERN KS SWWD INTO TX
PANHANDLE. ALONG AND AHEAD OF FRONT THE AIR MASS IS HOT WITH
CONSIDERABLE INSTABILITY PARTICULARLY ERN PORTION OF WATCH. PULSE
TYPE THUNDERSTORMS WILL INCREASE IN NUMBER AND INTENSITY VICINITY
FRONTAL CONVERGENCE. HIGH BASES WITH DCAPES IN EXCESS OF 1500
J/KG...SUPPORTS POTENTIAL FOR DAMAGING DOWNBURST WINDS WITH ANY
STRONG UPDRAFT THAT DEVELOPS. STORM MOTION WILL BE SLOW WITH THE
VERY WARM AIRMASS LIMITING THE HAIL SIZE TO GENERALLY LESS THAN 2
INCHES IN MOST INTENSE STORMS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 2705.

...HALES

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