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Tornado Watch 678
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WW0678 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Moderate Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
High High

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL8
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 678
   NWS STORM PREDICTION CENTER NORMAN OK
   345 PM CDT SAT AUG 8 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          EASTERN MINNESOTA
          WESTERN WISCONSIN
   
   EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 345 PM UNTIL
   1000 PM CDT.
   
   TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
   GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
   AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE
   MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTH NORTHWEST OF
   MANKATO MINNESOTA TO 60 MILES EAST OF EAU CLAIRE WISCONSIN.  FOR
   A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU8).
   
   REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
   TORNADOES AND 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.
   
   OTHER WATCH INFORMATION...CONTINUE...WW 677...
   
   DISCUSSION...UPPER IMPULSE OVER THE ERN DAKOTAS IS EXPECTED TO AID
   IN INCREASED STORM DEVELOPMENT ACROSS ERN MN AND WRN WI INTO THE
   EVENING HOURS. EFFECTIVE SHEAR NEAR 50 KT AND EXTREME INSTABILITY
   AROUND 5000 J/KG WILL BE FAVORABLE FOR INTENSE SUPERCELLS WITH VERY
   LARGE HAIL AND WIND DAMAGE. ALTHOUGH THE LOW LEVEL SHEAR IS ONLY
   AROUND 15 KT...THE PRESENCE OF LOW LEVEL BOUNDARIES AND AMOUNT OF
   INSTABILITY MAY COMPENSATE FOR THE WEAKER LOW LEVEL SHEAR AND YIELD
   A COUPLE OF TORNADOES.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   550. MEAN STORM MOTION VECTOR 24035.
   
   
   ...IMY
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Page last modified: August 09, 2009
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