The Sea Wing disaster occurred on July 13, 1890, when a strong squall line overturned the excursion vessel Sea Wing on Lake Pepin near Lake City, Minnesota. About 215 people were aboard the vessel when it was overturned, and as a result 98 people drowned. An excursion barge that was being towed by the Sea Wing was unharmed. It is one of the worst maritime disasters that has occurred on the upper Mississippi River. Tornadoes had occurred earlier in the evening farther north in the Twin Cities area, but it is believed that downburst winds from a thunderstorm caused the event.