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913 

WWUS20 KWNS 142313

SEL6

SPC WW 142313

NDZ000-NEZ000-SDZ000-150600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 446

NWS STORM PREDICTION CENTER NORMAN OK

615 PM CDT SUN AUG 14 2016



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  PARTS OF SOUTHERN NORTH DAKOTA

  NORTH CENTRAL NEBRASKA

  WESTERN AND CENTRAL SOUTH DAKOTA



* EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 615 PM

  UNTIL 100 AM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE



SUMMARY...THUNDERSTORMS DEVELOPING OVER THE WESTERN SOUTH DAKOTA

VICINITY ARE FORECAST TO CONTINUE/EXPAND IN COVERAGE THROUGH THIS

EVENING...POSSIBLY EVOLVING INTO ONE OR MORE BOWING CLUSTERS.  ALONG

WITH POTENTIAL FOR HAIL WITH STRONGER UPDRAFTS...DAMAGING WINDS ARE

EXPECTED.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 110

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 80 MILES SOUTH

SOUTHWEST OF LEMMON SOUTH DAKOTA TO 25 MILES EAST SOUTHEAST OF

CHAMBERLAIN SOUTH DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH

SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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.



&&



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 29035.





...GOSS

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