October 2010 North American storm complex
Satellite image of the storm complex at peak intensity, on October 27, 2010.
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| Type | Extratropical cyclone, Blizzard, Derecho, Tornado outbreak, Windstorm |
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| Formed | October 23, 2010 |
| Dissipated | November 5, 2010 |
| Lowest pressure | 955.2 mb (28.21 inHg) |
| Tornadoes confirmed | 69 confirmed (Record for a continuous outbreak in October) |
| Max rating1 | EF2 tornado |
| Maximum snowfall or ice accretion | 9 inches (22.9 cm) St. Louis County, Minnesota |
| Damage | US$18.5 million (tornado) |
| Casualties | 1 (snow); injuries unknown |
| Areas affected | Eastern two-thirds of North America and adjacent waters Ireland United Kingdom Western Europe |
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1Most severe tornado damage; see Enhanced Fujita scale Part of the 2010–11 North American winter storms |
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1Most severe tornado damage; see Enhanced Fujita scale
The October 2010 North American storm complex is the name given to a historic extratropical cyclone that impacted North America. The massive storm complex caused a wide range of weather events including a major serial derecho stretching from the Gulf Coast to the Great Lakes, a widespread tornado outbreak across the Southeast United States and Midwest and a blizzard across portions of the Canadian Prairies and the Dakotas. The cyclone's lowest minimum pressure of 955.2 mb (28.21 inHg) made it the second most intense non-tropical system recorded in the continental United States (CONUS). The lowest confirmed pressure for a non-tropical system in the continental United States was set by a January 1913 Atlantic coast storm.
Significant snowfall was reported on the backside of the storm. The heaviest snow fell in parts of Minnesota where 9 inches (22.5 cm) of snow was reported in St. Louis County, Minnesota. Heavy snow and blizzard conditions also occurred in North Dakota, southwestern Manitoba and southeastern Saskatchewan.
The non-tropical cyclonic storm generated wind speeds of up to 70 mph, caused by a severe low pressure zone over Nebraska on October 24th.
Akron, Cleveland, Findlay, Marion, Lorain, Mansfield, Toledo, Wooster and Youngstown, Ohio all witnessed heavy winds on the 24th.
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