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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 748

NWS STORM PREDICTION CENTER NORMAN OK

600 PM CDT MON AUG 8 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN...CENTRAL AND NORTHEASTERN OKLAHOMA



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 600 PM UNTIL

100 AM CDT.



HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTHWEST OF

BARTLESVILLE OKLAHOMA TO 40 MILES SOUTH OF CLINTON OKLAHOMA.  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 746...WW 747...



DISCUSSION...TSTMS EXPECTED TO INCREASE IN COVERAGE AND STRENGTH

ALONG BOTH SLOWLY-ADVANCING NE-SW COOL FRONT IN WRN OK...AND...MOST

LIKELY LATER THIS EVE...ALONG STALLING WNW-ESE OUTFLOW BOUNDARY IN N

CNTRL/NE OK.  A CLUSTER OR TWO OF STORMS MAY EVOLVE WITH

TIME...ESPECIALLY INVOF OF FRONT-BOUNDARY INTERSECTION IN NW OR N

CNTRL OK.  THERMODYNAMIC SETUP APPEARS FAVORABLE FOR MICROBURSTS

AND/OR SMALL BOWING SEGMENTS WITH HIGH WIND.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 32020.





...CORFIDI

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