SEL6

   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 86
   NWS STORM PREDICTION CENTER NORMAN OK
   230 PM MDT TUE APR 22 2014

   THE NWS STORM PREDICTION CENTER HAS ISSUED A

   * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
     EASTERN IDAHO
     SOUTHWEST MONTANA
     WESTERN WYOMING

   * EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 230 PM UNTIL
     1000 PM MDT.

   * PRIMARY THREATS INCLUDE...
     SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65
   STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES SOUTHEAST OF
   MALAD CITY IDAHO TO 40 MILES WEST NORTHWEST OF HARLOWTON MONTANA.
    FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU6).

   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...TSTMS EXPECTED TO INCREASE IN COVERAGE/STRENGTH THROUGH
   EARLY TNGT ALONG AND AHEAD OF INTENSIFYING COLD FRONT CROSSING THE
   NRN GRT BASIN/NRN RCKYS...WITH DEVELOPMENT AIDED BY UPR IMPULSE
   APPROACHING FROM NV. STRENGTH OF LARGELY UNIDIRECTIONAL SSWLY WIND
   FIELD AND RELATIVELY STEEP LOW TO MID-LVL LAPSE RATES SUGGEST
   POTENTIAL FOR DOWNWARD MOMENTUM TRANSFER AND POSSIBLY DMGG SFC WIND
   GUSTS DESPITE SPARSE MOISTURE.

   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 400. MEAN STORM MOTION
   VECTOR 21040.


   ...CORFIDI