1944: On this date, six estimated F2 or greater tornadoes were tracked across northeast South Dakota and west central Minnesota. The first tornado touched down at approximately 3:30 pm CST in Faulk County. This estimated F2 tornado destroyed all buildings except the house on a farm 7 miles northeast of Faulkton. The next tornado occurred at 4:00 pm CST in Codington County, where barns were destroyed. Cattle and a truck were thrown into Grass Lake, near Wallace. About the same time, in Brown County, a tornado moved northeast from just northeast of Warner and crossed the town of Bath. This storm killed two people and injured another twelve. A couple was killed in the destruction of their home. Twenty homes in Bath were damaged. A brick school had its upper story torn off. Another tornado moved through Codington County at 4:45 pm CST, killing three and injuring twenty-five. This F4 strength tornado moved northeast from two miles northeast of Henry, passing over Long Lake and ending 2 miles northwest of Florence. The funnel was described as snake-like over Long Lake and massive as it swept through five farms southwest of Florence. Over 100 head of cattle were killed, and about a dozen homes were destroyed. In Day County an estimated F2 moved due north from 4 miles south of Webster, ending 2 miles northeast of Roslyn. This storm passed two miles east of Webster where barns were destroyed, and livestock was killed on a half dozen farms. At 5:15 pm CST a monster of a storm moved northeast from 5 miles south of Summit, passing 3 miles south of Wilmot and ending about 3 miles east of Beardsley, Minnesota. This massive tornado had an estimated width of 1500 yards and traveled 30 miles. Along the path, eight people were killed, and another forty-three were injured. Farm devastation southwest and south of Wilmot was as complete as it could be with some farms reportedly left without even debris on the property. About 15 farms in South Dakota reported F3-F5 damage. From this day, the Red Cross counted 13 dead and 560 people injured across the state.
A look back on the 45th anniversary of Hurricane “Agnes.” pic.twitter.com/te3NY1tguP
— NWS MARFC (@NWSMARFC) June 17, 2017
1946: The third deadliest tornado in Canadian history struck southwestern Ontario from Windsor to Tecumseh. 17 people were killed and hundreds injured. Damage was conservatively estimated at $1.5 million dollars.
2010: This day will go down as the day with the greatest single-day tornado total in Minnesota history. The three, EF4 tornadoes in Minnesota were the first tornadoes EF4 or stronger in this state since the Granite Falls tornado on July 25, 2000. This outbreak produced the greatest number of tornadoes rated EF4 or higher in one day in Minnesota since the Black Sunday tornado outbreak on April 30, 1967. This was the first EF4 tornado in Freeborn County since the Black Sunday outbreak The four total EF4 tornadoes across the Upper Midwest on June 17, 2010 (3 in MN, and 1 in ND) were the most in any outbreak in the U.S. since the “Super Tuesday Outbreak” on February 5-6, 2008. The number of tornado fatalities (4) on this day was the highest in Minnesota since July 5, 1978.
Source: NWS Office in the Twin Cities.
2009: A tornado leveled a house knocks down power poles and overturns about a dozen railroad cars in Aurora, Nebraska. The tornado is rated EF2, with winds between 111 and 135 mph.
Source: NWS Office in Hastings, Nebraska.
— Travels & Chases (@TRAVELSnCHASES) June 17, 2017