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339 

WWUS20 KWNS 212144

SEL1

SPC WW 212144

SDZ000-220400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 281

NWS STORM PREDICTION CENTER NORMAN OK

445 PM CDT TUE JUN 21 2016



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WESTERN AND CENTRAL SOUTH DAKOTA



* EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 445 PM UNTIL

  1100 PM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WINDS LIKELY WITH ISOLATED SIGNIFICANT GUSTS

    TO 75 MPH POSSIBLE

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  A TORNADO OR TWO POSSIBLE



SUMMARY...THUNDERSTORMS THAT ARE NOW FORMING OVER NORTHEAST WY WILL

SPREAD RAPIDLY EASTWARD ACROSS THE WATCH AREA LATE THIS AFTERNOON

AND EVENING.  DAMAGING WINDS AND HAIL WILL BECOME AN INCREASING

CONCERN AS THEY MOVE EAST.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 55 MILES SOUTH

SOUTHWEST OF BUFFALO SOUTH DAKOTA TO 80 MILES EAST NORTHEAST OF

PIERRE SOUTH DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 278...WW 279...WW 280...



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 27035.





...HART

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