URGENT - IMMEDIATE BROADCAST REQUESTED
  TORNADO WATCH NUMBER 358
  NWS STORM PREDICTION CENTER NORMAN OK
  1135 AM CDT THU JUN 7 2007
 
  THE NWS STORM PREDICTION CENTER HAS ISSUED A
  TORNADO WATCH FOR PORTIONS OF
 
         MUCH OF CENTRAL AND EASTERN IOWA
         SMALL PART OF NORTHWEST ILLINOIS
         PART OF WESTERN UPPER MICHIGAN
         PARTS OF SOUTHEASTERN MINNESOTA
         MUCH OF WESTERN AND NORTHERN WISCONSIN
         LAKE SUPERIOR
 
  EFFECTIVE THIS THURSDAY MORNING AND EVENING FROM 1135 AM UNTIL
  1000 PM CDT.

...THIS IS A PARTICULARLY DANGEROUS SITUATION...

 DESTRUCTIVE TORNADOES...LARGE HAIL TO 2.5 INCHES IN DIAMETER...
  THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE
  POSSIBLE IN THESE AREAS.
 
  THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE
  MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHEAST OF
  KENNEDY WISCONSIN TO 45 MILES SOUTH SOUTHWEST OF OTTUMWA IOWA.
  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 357...
 
  DISCUSSION...VERY STRONG SHEAR PROFILES IN PLACE ACROSS WATCH WITH
  APPROACH OF VIGOROUS UPPER TROUGH AND DEEP SURFACE LOW.  AIR MASS
  HAS BECOME STRONGLY UNSTABLE AND WEAKLY CAPPED.  SUPERCELL
  THUNDERSTORMS WILL DEVELOP RAPIDLY ALONG W EDGE OF WATCH WHERE
  MOISTURE/INSTABILITY GRADIENT LOCATED.  POTENTIAL EXISTS FOR
  STRONG/LONG LIVED TORNADOES TO DEVELOP BY MID AFTERNOON ALONG WITH
  VERY DAMAGING WINDS.
 
  AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
  SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
  WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
  550. MEAN STORM MOTION VECTOR 24050.
 
 
  ...HALES