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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 129

NWS STORM PREDICTION CENTER NORMAN OK

940 PM CDT WED MAY 7 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHWEST OKLAHOMA

  PARTS OF WEST CENTRAL AND NORTHWEST TEXAS



* EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 940 PM

  UNTIL 300 AM CDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 40

STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH

NORTHWEST OF CHICKASHA OKLAHOMA TO 50 MILES SOUTH OF ABILENE

TEXAS.  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

SEVERE THUNDERSTORM WATCH NUMBER 123. WATCH NUMBER 123 WILL NOT

BE IN EFFECT AFTER 940 PM CDT. CONTINUE...WW 124...WW 125...WW

126...WW 127...WW 128...



DISCUSSION...ONGOING SUPERCELLS IN SW OK...AS WELL AS THE BAND OF

STORMS NEAR ABI...WILL LIKELY PERSIST FOR A FEW MORE HOURS IN THE

STRENGTHENING WARM ADVECTION REGIME.  STEEP MIDLEVEL LAPSE RATES AND

A GRADUAL INCREASE IN LOW-LEVEL MOISTURE WILL PARTIALLY OFFSET

NEAR-SURFACE STABILIZATION...WHILE STRONG VERTICAL SHEAR WILL

MAINTAIN A RISK FOR ORGANIZED STORMS CAPABLE OF PRODUCING LARGE HAIL

AND DAMAGING WINDS.



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 25025.





...THOMPSON

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