The October 2013 North American storm complex was a massive blizzard and tornado outbreak that affected the Northwest, Rockies, and much of the Midwest in early-October 2013.

A total of 22 tornadoes were confirmed as the system moved eastward across the eastern half of the United States, including two that were rated EF4.

[5] On October 3, 2013, the National Weather Service issued a blizzard warning for Rapid City and the Black Hills in advance of the storm urging people to delay or cancel travel plans.

The storm system also included thunderstorms that brought iced precipitation, significant rain and over half a dozen tornadoes to Nebraska and Iowa.

[12] The storm affected about 5,000 ranches in western South Dakota producing snow totals as high as 5 feet (1.5 m) and 70 mph (110 km/h) winds that scattered herds for miles and resulted in the deaths of many cattle due to exhaustion and hypothermia.