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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 474

NWS STORM PREDICTION CENTER NORMAN OK

140 PM MDT WED AUG 5 2015



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHEAST IDAHO

  NORTHWEST WYOMING



* EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 140 PM

  UNTIL 900 PM MDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WINDS AND ISOLATED SIGNIFICANT GUSTS TO 75

    MPH POSSIBLE

  ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE



SUMMARY...A STRONG UPPER TROUGH OVER NEVADA WILL TRACK

EASTWARD...WITH ASSOCIATED THUNDERSTORMS SPREADING ACROSS THE WATCH

AREA THIS AFTERNOON.  THE MORE INTENSE STORMS WILL POSE A RISK OF

DAMAGING WIND GUSTS AND HAIL.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH

NORTHEAST OF IDAHO FALLS IDAHO TO 35 MILES WEST SOUTHWEST OF

MALAD CITY IDAHO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 473...



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

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

MOTION VECTOR 24035.





...HART

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