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Severe Thunderstorm Watch 576
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WW0576 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.
   SEL6
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 576
   NWS STORM PREDICTION CENTER NORMAN OK
   905 AM MDT THU JUN 30 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          WESTERN COLORADO
          EASTERN UTAH
   
   EFFECTIVE THIS THURSDAY MORNING AND EVENING FROM 905 AM UNTIL 600
   PM MDT.
   
   HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 95
   STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES SOUTH OF
   BLANDING UTAH TO 45 MILES NORTH NORTHEAST OF VERNAL UTAH.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU6).
   
   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...STRONG-SEVERE STORMS HAVE ALREADY DEVELOPED ACROSS THE
   REGION THIS MORNING IN RESPONSE TO STRONG DYNAMIC FORCING ASSOCIATED
   WITH WRN UT VORTICITY MAXIMUM ACTING ON A STEEP LAPSE RATE
   ENVIRONMENT.  DAYTIME HEATING COUPLED WITH PW VALUES OF .70-.90 INCH
   WILL SUPPORT FURTHER AIR MASS DESTABILIZATION TODAY WITH MLCAPE
   APPROACHING 1000-1500 J/KG.  AS SUCH...EXPECT STORMS TO GRADUALLY
   EVOLVE INTO MULTIPLE BANDS ALONG AND AHEAD OF THE PACIFIC FRONT WITH
   ATTENDANT RISKS FOR DAMAGING WINDS AND SOME HAIL.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 20035.
   
   
   ...MEAD
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Page last modified: July 01, 2011
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