

063 

WWUS20 KWNS 142020

SEL8

SPC WW 142020

IDZ000-MTZ000-150300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 488

NWS STORM PREDICTION CENTER NORMAN OK

220 PM MDT FRI AUG 14 2015



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  CENTRAL IDAHO

  WESTERN AND CENTRAL MONTANA



* EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 220 PM UNTIL

  900 PM MDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE



SUMMARY...STORMS DEVELOPING OVER SOUTHWESTERN MONTANA AND CENTRAL

IDAHO ARE EXPECTED TO INTENSIFY AS THEY SPREAD NEWD ACROSS WESTERN

AND CENTRAL MONTANA THROUGH THE EVENING HOURS.  DAMAGING WIND GUSTS

WILL BE THE PRIMARY HAZARD.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES SOUTH OF

SALMON IDAHO TO 30 MILES WEST NORTHWEST OF HAVRE MONTANA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU8).



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 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

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

VECTOR 22035.





...WEISS

