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Severe Thunderstorm Watch 329
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WW0329 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Moderate 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 329
   NWS STORM PREDICTION CENTER NORMAN OK
   210 PM MDT THU JUN 4 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTHWESTERN IDAHO
          EASTERN OREGON
   
   EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 210 PM UNTIL
   900 PM MDT.
   
   HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 95
   STATUTE MILES EITHER SIDE OF A LINE FROM 45 MILES NORTH OF
   REDMOND OREGON TO 60 MILES EAST SOUTHEAST OF BOISE IDAHO.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU9).
   
   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 327...WW 328...
   
   DISCUSSION...STORMS ARE EXPECTED TO INCREASE IN COVERAGE AND
   INTENSIFY THROUGH THE AFTERNOON AS AIR MASS CONTINUES TO WARM AND
   DESTABILIZE. MODERATE INSTABILITY AND DEEP LAYER SHEAR AT 40-50 KT
   WILL BE SUPPORTIVE OF SUPERCELLS. SEVERE HAIL IS EXPECTED TO BE THE
   PRIMARY THREAT...THOUGH STEEP LOW LEVEL LAPSE RATES WILL ALSO
   SUPPORT DAMAGING WINDS.
   
   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 15030.
   
   
   ...IMY
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Page last modified: June 05, 2009
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