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Severe Thunderstorm Watch 555
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WW0555 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.
   SEL5
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 555
   NWS STORM PREDICTION CENTER NORMAN OK
   205 PM MDT MON JUL 6 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          PARTS OF NORTH CENTRAL AND NORTHEASTER COLORADO
          WESTERN PORTIONS OF THE NEBRASKA PANHANDLE
          PARTS OF EAST CENTRAL AND SOUTHEAST WYOMING
   
   EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 205 PM UNTIL 800
   PM MDT.
   
   HAIL TO 2 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 80
   STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES EAST
   NORTHEAST OF DOUGLAS WYOMING TO 45 MILES WEST SOUTHWEST OF LIMON
   COLORADO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).
   
   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 553...WW 554...
   
   DISCUSSION...CONVECTION CONTINUES TO INCREASE ACROSS THE CENTRAL
   ROCKIES AHEAD OF A VIGOROUS MID-LEVEL SHORT-WAVE TROUGH CROSSING THE
   NORTHERN INTERMOUNTAIN REGION ATTM.  NWWD ADVECTION OF UPPER 50S TO
   LOW 60S SURFACE DEWPOINTS INTO THE HIGH PLAINS COMBINED WITH DAYTIME
   HEATING HAVE RESULTED IN MODERATE DESTABILIZATION...WHICH WILL
   SUPPORT AN INTENSIFICATION OF STORMS MOVING SEWD OFF THE HIGHER
   TERRAIN.
   STORM INTENSIFICATION WILL ALSO BE AIDED BY INCREASING MID-LEVEL
   FLOW WITH TIME...CONTRIBUTING TO SHEAR SUFFICIENT FOR MULTICELL
   ORGANIZATION -- AND EVENTUALLY PERHAPS SOME MID-LEVEL UPDRAFT
   ROTATION.  ALONG WITH THE THREAT FOR LARGE HAIL...LOCALLY
   STRONG/GUSTY WINDS WILL BE POSSIBLE.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
   MOTION VECTOR 30025.
   
   
   ...GOSS
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