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WWUS20 KWNS 072233

SEL3

SPC WW 072233

COZ000-KSZ000-OKZ000-TXZ000-080500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 483

NWS STORM PREDICTION CENTER NORMAN OK

435 PM MDT WED AUG 7 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  PORTIONS OF SOUTHEAST COLORADO

  SOUTHWESTERN KANSAS

  THE OKLAHOMA PANHANDLE

  THE TEXAS PANHANDLE



* EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 435 PM

  UNTIL 1100 PM MDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES NORTHWEST OF

GARDEN CITY KANSAS TO 10 MILES SOUTHEAST OF AMARILLO TEXAS.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



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...CONTINUE...WW 482...



DISCUSSION...THUNDERSTORMS DEVELOPING OVER THE HIGHER TERRAIN

CONTINUE TO INCREASE IN COVERAGE AND SHIFT SLOWLY EASTWARD TOWARD

LOWER ELEVATIONS...WITHIN A BACKGROUND ENVIRONMENT OF MARGINAL SHEAR

AND MODEST INSTABILITY IN CONJUNCTION WITH WEAK LOW-LEVEL

EASTERLY/UPSLOPE FLOW.  SOME INCREASE IN SHEAR IS ANTICIPATED THIS

EVENING AS THE EASTERLY LOW-LEVEL JET STRENGTHENS -- WHICH COULD

SUPPORT UPSCALE GROWTH OF CONVECTION AND AN INCREASE IN DAMAGING

WIND THREAT.  UNTIL THEN...ISOLATED SEVERE STORMS CAPABLE OF

PRODUCING LARGE HAIL AND LOCALLY DAMAGING GUSTS CAN BE EXPECTED.



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 26025.





...GOSS

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