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Severe Thunderstorm Watch 425
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WW0425 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 425
   NWS STORM PREDICTION CENTER NORMAN OK
   1050 PM CDT FRI JUN 3 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          UPPER PENINSULA OF MICHIGAN
          NORTHEAST WISCONSIN
          LAKE SUPERIOR
   
   EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 1050 PM
   UNTIL 600 AM CDT.
   
   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 60
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 80 MILES SOUTHWEST
   OF HOUGHTON MICHIGAN TO 100 MILES EAST NORTHEAST OF ESCANABA
   MICHIGAN.  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 423...WW 424...
   
   DISCUSSION...ELEVATED TSTMS /INCLUDING SUPERCELLS/ OVER WRN LAKE
   SUPERIOR ARE EXPECTED TO PERSIST OVERNIGHT...AND POSSIBLY INCREASE
   IN AREAL COVERAGE ALONG THE NRN FRINGE OF THE CAP WHERE LOW-LEVEL
   WAA WILL FOCUS FORCING FOR ASCENT.  THE COMBINATION OF MUCAPE OF
   2000-3000 J/KG AND EFFECTIVE BULK SHEAR OF 40-45 KT WILL SERVE TO
   MAINTAIN ORGANIZED STORM MODES WITH A POTENTIAL FOR UPSCALE GROWTH
   INTO AN MCS.  WHILE LARGE HAIL WILL INITIALLY BE THE PRIMARY
   HAZARD...DAMAGING WINDS WILL BECOME INCREASINGLY POSSIBLE IF STORMS
   CAN ORGANIZE A COLD POOL.
   
   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 500. MEAN STORM
   MOTION VECTOR 27030.
   
   
   ...MEAD
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