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WWUS20 KWNS 052220

SEL2

SPC WW 052220

IDZ000-NVZ000-UTZ000-WYZ000-060500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 392

NWS STORM PREDICTION CENTER NORMAN OK

420 PM MDT FRI JUL 5 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHEAST IDAHO

  NORTHEAST NEVADA

  NORTHERN AND WESTERN UTAH

  WESTERN WYOMING



* EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 420 PM UNTIL

  1100 PM MDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 105

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES WEST

SOUTHWEST OF WENDOVER UTAH TO 35 MILES EAST NORTHEAST OF BIG

PINEY WYOMING.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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.



&&



DISCUSSION...THUNDERSTORMS CONTINUE TO DEVELOP THIS AFTERNOON AHEAD

OF A SHORT-WAVE TROUGH SHIFTING EAST-SOUTHEAST ACROSS THE

WASHINGTON/OREGON VICINITY.  WITH ENHANCED WEST-SOUTHWESTERLY

MID-LEVEL FLOW SOUTHEAST OF THE TROUGH AND A RELATIVELY

MOIST/UNSTABLE ENVIRONMENT HAVING DIURNALLY EVOLVED...ISOLATED

SEVERE STORMS CAPABLE OF PRODUCING LOCALLY DAMAGING GUSTS AND LARGE

HAIL WILL LIKELY CONTINUE THROUGH THE MID EVENING TIME FRAME.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM

MOTION VECTOR 26030.





...GOSS

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