Portal:Tornadoes/Anniversaries/August 20

August 20
 * 1928 – A tornado outbreak resulted in nine deaths across the Upper Midwest. An F4 tornado moved through Austin, Minnesota and caused near-F5 damage to a farm near Glenville, killing six people and injuring 60. Five died in Austin. An F3 tornado killed two people in Twin Lakes, Iowa, where debris from destroyed cottages reportedly filled the eponymous lakes. Another F4 tornado killed an infant on a farm near Ellsworth, Iowa.
 * 1970 – An F3 tornado struck Sudbury, Ontario, with little warning, killing six people and causing CAD $17 million in damage. Weather authorities were initially reluctant to classify this event as a tornado.
 * 2009 – A tornado outbreak produced 19 tornadoes across southern Ontario. An F2 tornado killed a child in Durham and injured several other people. Two F2 tornadoes (one of them possibly F3) hit Vaughan, damaging over 600 homes.