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845 

WWUS20 KWNS 100327

SEL1

SPC WW 100327

OKZ000-101100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 761

NWS STORM PREDICTION CENTER NORMAN OK

1025 PM CDT TUE AUG 9 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHWEST THROUGH CENTRAL TO NORTHERN OKLAHOMA



EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1025 PM

UNTIL 600 AM CDT.



HAIL TO 1 INCH 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 85

STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHWEST OF

PONCA CITY OKLAHOMA TO 25 MILES SOUTHEAST OF ALTUS OKLAHOMA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 757...WW 758...WW

759...WW 760...



DISCUSSION...HIGH-BASED TSTMS THAT FORMER EARLIER IN THE TX

PANHANDLE HAVE MOVED/PROPAGATED E INTO WRN OK.  THIS ACTIVITY WILL

ENCOUNTER INCREASING LOW LVL MOISTURE WITH EWD EXTENT...ESPECIALLY

IN THE SRN HALF OF THE STATE.  AT THE SAME TIME...SUPERCELL

CLUSTER/POSSIBLE DEVELOPING MCS IN CNTRL KS SHOULD CONTINUE STEADILY

SSEWD.  COUPLED WITH STRENGTHENING OF SSWLY LLJ...SETUP APPEARS

FAVORABLE FOR SPORADIC INSTANCES OF DMGG WIND/MARGINALLY SVR HAIL

WITH WRN OK ACTIVITY...AND PERHAPS A SOMEWHAT MORE WIDESPREAD WIND

THREAT EARLY WED OVER PARTS OF N CNTRL/NE OK.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

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

VECTOR 29030.





...CORFIDI

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