The Great Blizzard of 1978 was a historic blizzard which struck the Ohio Valley and Great Lakes

Great Lakes

The Great Lakes are a collection of freshwater lakes located in northeastern North America, on the Canada – United States border. Consisting of Lakes Superior, Michigan, Huron, Erie, and Ontario, they form the largest group of freshwater lakes on Earth by total surface, coming in second by volume...

 from January 25–27, 1978. The 28.28 inches (958 millibars) barometric pressure measurement recorded in Cleveland, Ohio

Cleveland, Ohio

Cleveland is a city in the U.S. state of Ohio and is the county seat of Cuyahoga County, the most populous county in the state. The city is located in northeastern Ohio on the southern shore of Lake Erie, approximately west of the Pennsylvania border...

 was the lowest non-tropical atmospheric pressure ever recorded in the mainland United States until the Upper Midwest Storm of October 26, 2010 (28.20" measured at 5:13PM CDT at Bigfork Municipal Airport, Bigfork, MN).