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644 

WWUS20 KWNS 190842

SEL9

SPC WW 190842

OKZ000-TXZ000-191500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 189

NWS STORM PREDICTION CENTER NORMAN OK

345 AM CDT WED MAY 19 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF NORTHERN OKLAHOMA

       PARTS OF NORTHERN TEXAS PANHANDLE



EFFECTIVE THIS WEDNESDAY MORNING FROM 345 AM UNTIL 1000 AM 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 45

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 80 MILES WEST OF

GAGE OKLAHOMA TO 55 MILES NORTHEAST OF CHANDLER OKLAHOMA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU9).



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...THIS SEVERE THUNDERSTORM WATCH REPLACES

TORNADO WATCH NUMBER 188. WATCH NUMBER 188 WILL NOT BE IN EFFECT

AFTER 345 AM CDT.



DISCUSSION...SEVERAL SUPERCELLS CONTINUE ACROSS NRN TX PANHANDLE

INTO NWRN OK.  WHILE STORMS APPEAR TO BE ELEVATED...LARGE HAIL

THREAT SHOULD CONTINUE AS 50-60KT LOW LEVEL JET PROVIDES BOTH

FAVORABLE SHEAR AND INFLUX OF MOISTURE/INSTABILITY.



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 27020.





...HALES

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