

000 

WWUS20 KWNS 190749

SEL6

SPC WW 190749

OKZ000-191300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 616

NWS STORM PREDICTION CENTER NORMAN OK

250 AM CDT SUN AUG 19 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL OKLAHOMA



EFFECTIVE THIS SUNDAY MORNING FROM 250 AM UNTIL 800 AM CDT.



TORNADOES...HAIL TO 0.5 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 40 STATUTE

MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH OF OKLAHOMA

CITY OKLAHOMA TO 50 MILES SOUTHEAST OF FORT SILL OKLAHOMA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU6).



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...REMNANT CIRCULATION OF TD ERIN HAS RAPIDLY INTENSIFIED

OVER THE PAST FEW HOURS...WITH LOW LEVEL VERTICAL SHEAR PROFILES

BECOMING EXTREMELY STRONG ON LOCAL VAD/PROFILERS.  THUNDERSTORMS IN

ADVANCE OF CIRCULATION CENTER HAVE ALSO SHOWN MARKED INCREASES IN

ORGANIZATION WITH A FEW MESOCYCLONES NOW BEING INDICATED.  THREAT

FOR ISOLATED TORNADOES AND DAMAGING WINDS WILL PERSIST FOR THE NEXT

SEVERAL HOURS AND SPREAD SLOWLY EASTWARD ACROSS CENTRAL OK.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

600. MEAN STORM MOTION VECTOR 24025.





...HART

