National Weather Service United States Department of Commerce


On Thursday June 17, 2010, an outbreak of severe thunderstorms occurred across parts of the Upper Midwest, particularly across North Dakota and Minnesota. This outbreak featured many reports of tornadoes, and many of those reports have been confirmed as tornado tracks by National Weather Service offices across the region. This outbreak affected a portion of the NWS Duluth, MN county warning area (CWA), particularly parts of northeast Minnesota.

As of June 17, 2020: This event holds the record for the most tornadoes to occur during a single day in Minnesota with 48. June 2010 also holds the record for the number of tornadoes in one month in Minnesota with 71, and 2010 was the record year for tornadoes in Minnesota with 113.


Fast Facts:

  • This was the first strong tornado (EF2/F2 or stronger) in the area (NWS Duluth CWA) since June 18, 2001 - the day of the Siren, Wisconsin F3 tornado.
  • This was the first day with at least 3 tornadoes in the NWS Duluth CWA since June 11, 2005.
  • This was only the second strong tornado on record in Pine County, Minnesota. The only other one occurred on July 7, 1970, in northern parts of the county.
  • It had been over 5 years since Pine County had experienced a tornado - dating back to June 11, 2005.
  • It had been 9 years since the NWS Duluth CWA had a strong tornado. Going back to 1950 when tornado records begin, the longest time between strong tornadoes in our area was previously 6 years and 3 days between July 3, 1985, and July 5, 1991.
  • The 4 violent tornadoes (EF-4 ratings) - 3 in Minnesota and 1 in North Dakota - were the most in any one event since the Super Tuesday Outbreak of February 5-6, 2008.


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