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751 

WWUS20 KWNS 212106

SEL0

SPC WW 212106

MTZ000-NDZ000-220400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 280

NWS STORM PREDICTION CENTER NORMAN OK

310 PM MDT TUE JUN 21 2016



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHEAST MONTANA

  WESTERN NORTH DAKOTA



* EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 310 PM UNTIL

  1000 PM MDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WINDS AND ISOLATED SIGNIFICANT GUSTS TO 80

    MPH POSSIBLE

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 3

    INCHES IN DIAMETER POSSIBLE

  A TORNADO OR TWO POSSIBLE



SUMMARY...AHEAD OF A FAST MOVING MID-LEVEL IMPULSE...STRONG TO

SEVERE THUNDERSTORMS WILL STEADY INCREASE WITHIN AN INCREASINGLY

MOIST AND UNSTABLE AIR MASS FROM NORTHEAST MONTANA INTO WESTERN

NORTH DAKOTA. SUPERCELLS ARE INITIALLY EXPECTED BY A FAST-MOVING

CONVECTIVE LINE COULD EVOLVE INTO WESTERN NORTH DAKOTA LATER THIS

EVENING.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

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

GLASGOW MONTANA TO 55 MILES NORTHEAST OF DICKINSON NORTH DAKOTA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU0).



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...



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

TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

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

MOTION VECTOR 27030.





...GUYER

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