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WWUS20 KWNS 192203

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SPC WW 192203

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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 335

NWS STORM PREDICTION CENTER NORMAN OK

500 PM CDT THU JUN 19 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTH PLAINS AND SOUTHERN PANHANDLE REGIONS OF TEXAS



* EFFECTIVE THIS THURSDAY AFTERNOON FROM 500 PM UNTIL MIDNIGHT

  CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  ISOLATED VERY LARGE HAIL EVENTS TO 2.5 INCHES IN DIAMETER

    POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES SOUTH OF

LUBBOCK TEXAS TO 35 MILES EAST NORTHEAST OF AMARILLO TEXAS.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 334...



DISCUSSION...INITIALLY WIDELY SCATTERED DISCRETE/CLUSTERED TSTMS

INVOF NM BORDER MAY AGGREGATE COLD POOLS WITH CONVECTION POTENTIALLY

GROWING UPSCALE AND ACCELERATING EWD INTO VERY UNSTABLE

BOUNDARY-LAYER REGIME.  ALTHOUGH EFFECTIVE-SHEAR MAGNITUDES WILL

REMAIN ONLY IN 20-30-KT RANGE...FORWARD-PROPAGATION AND RELATED

FORCED ASCENT SHOULD AID IN THREAT FOR INCREASED ORGANIZATION AND

WIND-DAMAGE RISK.  ISOLATED/MESSY SUPERCELL STRUCTURES MAY PERSIST

FOR ANOTHER HOUR OR TWO AS WELL...WITH LARGE HAIL A DISTINCT RISK

DURING THAT PHASE.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 27025.





...EDWARDS

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