The First North American Blizzard of 2010 was a winter storm and severe weather event that tracked from the U.S. states of California to Arizona through northern Mexico, the American Southwest, the Midwest, Southeast, and Mid-Atlantic regions. The storm created historic snowfall totals in the Mid-Atlantic states, rivaling the Knickerbocker Storm of 1922, as well as extensive flooding and landslides in Mexico. The storm stretched from Mexico and New Mexico to New Jersey before moving out to sea, then turning north to impact the Maritime Provinces of Canada.

The storm caused deaths in Mexico, New Mexico, Maryland, and Virginia. Blizzard conditions were reported in a relatively small area of Maryland, but near-blizzard conditions occurred through a large part of the Mid-Atlantic States. Additionally, some places across Eastern West Virginia, Maryland, Northern Virginia, Washington, D.C., Delaware, Southwestern Pennsylvania, South Central Pennsylvania, Southeastern Pennsylvania and Southern New Jersey received between 20 inches (0.51 m) and 40 inches (1.02 m) of snow, bringing air, rail, and Interstate Highway travel to a complete halt.

The storm was followed just three days later by the Second North American Blizzard of 2010. The main storm system originated in the Pacific Ocean, passing through California and Arizona on February 1 and 2, delivering heavy rain and mountain snow to these regions. On February 3, the system dropped into northern Mexico, before swinging northeast into southern New Mexico, and then ejecting eastward across Texas.

The storm was responsible for producing over a foot of snowfall in the higher elevations and the eastern plains of New Mexico, shutting down major highways including Interstate 40 east of Albuquerque for several hours on February 3. The center of circulation then tracked across central Texas to the Gulf Coast, while producing rain and snow for Oklahoma and northern Texas, and severe thunderstorms further south. Meanwhile another low pressure center tracked from the northern Rockies to the Upper Midwest, bringing light snow showers to Montana, the Dakotas, parts of Minnesota, Wisconsin, Iowa, and Illinois.

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