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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 242

NWS STORM PREDICTION CENTER NORMAN OK

1250 PM MDT FRI JUN 6 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WESTERN NEBRASKA

  SOUTH CENTRAL SOUTH DAKOTA



* EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 1250 PM UNTIL

  800 PM MDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A TORNADO OR TWO POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65

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

SOUTHEAST OF SIDNEY NEBRASKA TO 55 MILES NORTH OF VALENTINE

NEBRASKA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 239...WW 240...WW 241...



DISCUSSION...SCATTERED THUNDERSTORM CLUSTERS WILL CONTINUE TO MATURE

ALONG A PRE-FRONTAL CONFLUENCE ZONE ACROSS THE CENTRAL HIGH PLAINS.

WITH TIME TSTMS MAY CONGREGATE ALONG COLD FRONT AS IT SETTLES INTO

WESTERN NEBRASKA AND SOUTH CENTRAL SD.  LARGE HAIL IS THE PRIMARY

THREAT.



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 24020.





...DARROW

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