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000 

WWUS20 KWNS 180952

SEL5

SPC WW 180952

OKZ000-TXZ000-181700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 415

NWS STORM PREDICTION CENTER NORMAN OK

450 AM CDT MON JUN 18 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTH CENTRAL AND SOUTHEAST OKLAHOMA

       NORTH TEXAS



EFFECTIVE THIS MONDAY MORNING FROM 450 AM UNTIL NOON CDT.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE

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

MCALESTER OKLAHOMA TO 25 MILES SOUTH SOUTHEAST OF SHERMAN TEXAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU5).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



DISCUSSION...SMALL MCS ASSOCIATED WITH EJECTING UPR VORT EXPECTED TO

CONTINUE SLOWLY ENE THIS MORNING.  AS DEEP SHEAR INCREASES...

POTENTIAL MAY INCREASE FOR EMBEDDED SEMI-DISCRETE STRUCTURES.

SLIGHTLY BACKED AND VERY MOIST LLJ ASSOCIATED WITH SYSTEM WILL

CONTINUE TO SUPPORT OCCASIONAL AREAS OF ENHANCED LOW LEVEL

ROTATION...AND A THREAT FOR BRIEF TORNADOES/STRONG WET MICROBURSTS.



AVIATION...TORNADOES AND 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 500.

MEAN STORM MOTION VECTOR 24020.





...CORFIDI

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