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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 249

NWS STORM PREDICTION CENTER NORMAN OK

1045 PM CDT WED MAY 29 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  CENTRAL AND EASTERN OKLAHOMA



* EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 1045

  PM UNTIL 600 AM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A FEW VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  A FEW TORNADOES POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTH

NORTHWEST OF FORT SILL OKLAHOMA TO 20 MILES EAST OF MUSKOGEE

OKLAHOMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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 244. WATCH NUMBER 244 WILL NOT BE IN EFFECT

AFTER 1045 PM CDT.



DISCUSSION...AS ANOTHER SHORT WAVE IMPULSE TURNS EAST OF THE ROCKIES

INTO THE CENTRAL HIGH PLAINS OVERNIGHT...LARGE-SCALE ASCENT

ASSOCIATED WITH LOWER/MID TROPOSPHERIC WARM ADVECTION WILL MAINTAIN

VIGOROUS CONVECTIVE DEVELOPMENT ACROSS PARTS OF CENTRAL INTO EASTERN

OKLAHOMA.  GIVEN LINGERING STEEP MID-LEVEL LAPSE RATES...AND A MOIST

LOW-LEVEL ENVIRONMENT...THERMODYNAMIC PROFILES STILL APPEAR

SUPPORTIVE OF A SEVERE HAIL/WIND THREAT...PERHAPS ENHANCED BY

FURTHER STRENGTHENING OF THE SOUTHERLY 850 MB JET THROUGH THE 50-70

KT RANGE.  THE RISK FOR AN ISOLATED TORNADO MAY NOT YET BE

COMPLETELY NEGLIGIBLE.



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 24035.





...KERR

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