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Severe Thunderstorm Watch 459
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WW0459 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Very Low Very Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Low Very Low

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL9

   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 459
   NWS STORM PREDICTION CENTER NORMAN OK
   135 PM PDT TUE AUG 12 2014

   THE NWS STORM PREDICTION CENTER HAS ISSUED A

   * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
     A SMALL PART OF THE IDAHO PANHANDLE
     NORTHERN OREGON
     SOUTH CENTRAL AND SOUTHEAST WASHINGTON

   * EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 135 PM UNTIL
     800 PM PDT.

   * PRIMARY THREATS INCLUDE...
     ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
     ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE

   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 55 MILES NORTHWEST
   OF THE DALLES OREGON TO 10 MILES EAST OF LEWISTON IDAHO.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU9).

   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...CONVECTION IS EXPECTED TO INCREASE IN A
   LOOSELY-ORGANIZED E-W BAND OVER NRN ORE AND SPREAD INTO WA THIS
   AFTERNOON...IN ADVANCE OF A NWD-MOVING MIDLEVEL TROUGH.  DEEP
   INVERTED-V PROFILES IN ADVANCE OF THE STORMS WILL FAVOR STRONG
   DOWNDRAFTS AND THE POTENTIAL FOR A FEW DAMAGING GUSTS.  ALSO...THE
   STRONGER STORMS COULD PRODUCE HAIL AROUND ONE INCH IN
   DIAMETER...PRIMARILY NEAR THE CASCADES.

   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 450. MEAN STORM MOTION
   VECTOR 18025.


   ...THOMPSON
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Page last modified: August 13, 2014
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