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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 573

NWS STORM PREDICTION CENTER NORMAN OK

355 PM CDT SUN AUG 12 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN OKLAHOMA

       NORTH-CENTRAL TEXAS



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 355 PM UNTIL

1100 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 65

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES WEST

NORTHWEST OF ABILENE TEXAS TO 30 MILES EAST SOUTHEAST OF DURANT

OKLAHOMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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.



DISCUSSION...TSTMS SHOULD INCREASE IN COVERAGE AND INTENSITY THROUGH

THE EVENING AS A WEAK COLD FRONT DEVELOPS SOUTH INTO A VERY HOT AND

MODERATELY UNSTABLE AIRMASS. LIFT ACROSS THE FRONT MAY BE ENHANCED

AS WEAK HEIGHT FALLS ASSOCIATED WITH A SHORTWAVE TROUGH CROSSING

KS/MO BRUSH THE REGION. VERY HOT AND WELL-MIXED BOUNDARY LAYER

SHOULD PROMOTE STRONG TO DAMAGING DOWNBURST WINDS AND A FEW STORMS

MAY BECOME BETTER ORGANIZED AND PERSIST AS THE FRONT/WIND SHIFT AND

SLIGHTLY STRONGER MID LEVEL FLOW DEVELOP ACROSS THE REGION THROUGH

THE EVENING HOURS.



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 30025.





...CARBIN

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