In early February, a major Category 3 nor'easter, which started out as a winter storm on the West Coast, impacted an even larger area with heavy snow, also causing seven fatalities.

In mid-February, a series of two major Category 3 winter storms brought a swath of widespread snow and ice from the Pacific Northwest, through the Deep South, and to the Northeast.

In mid-March, a historic Category 3 blizzard unfolded in the Rocky Mountains, with Denver and Cheyenne seeing one of their largest March snowstorms on record.

[4] Winter weather events began in late October in North America, with a crippling and devastating ice storm in the Southern Plains, which later merged with the remnants of Hurricane Zeta and produced more snow in New England.

[7] Later in the month, a powerful nor'easter brought heavy and impactful snow to widespread areas of the Northeastern United States and southern Canada.

[9][10] A powerful extratropical cyclone in the Bering Sea late in the month reached winds of over 100 mph (160 km/h) and a minimum central pressure of 921 mb (27.2 inHg) west of Alaska.

[11] Later in the month, a storm originating in the Rocky Mountains produced a swath of wintry weather from New Mexico through Alabama, including areas such as Lubbock, Austin, Metro Houston, and Shreveport, some of which saw over 6 inches of snow accumulation.

[12] Towards the middle of the month, a blizzard impacted the Midwest and the interior Northeast, producing heavy snow and extremely gusty winds behind the system.

[17] February began with a winter storm that moved through the Great Plains and Midwest, with heavy snow and blizzard-like conditions sparking a 40-vehicle pileup on Interstate 80 eastbound in Iowa, causing several serious injuries.

Then, a series of major winter storms blasted through the Western, Southern, and Eastern United States bringing heavy snow and ice.

In total, the four back-to-back storms resulted in tens of billions of dollars in damage, over 250 fatalities, at least 14 million power outages, and a crisis in the Deep South.

March began with a cold wave and windstorm in New England, which prompted wind chill warnings in four states and resulted in over 165,000 power outages.

[19] Later in the month, a historic and major blizzard impacted the Rocky Mountains with feet of snow, nearly breaking numerous all-time records, especially in the Denver and Cheyenne areas.

[27][28] The extratropical remnants of Hurricane Zeta combined with the previous winter storm to produce two separate snow events across parts of southern New England and upstate New York on October 29–30.

The nor'easter also caused significant impacts in Atlantic Canada; schools, government offices, public parks and recreation programs in the city of Halifax, Nova Scotia all had delayed openings or closures on December 18.

[56] In New York City, temperatures early morning on Christmas rise to 60 °F (16 °C) as the storm moves in with high winds, gusting up to 67 miles per hour (108 km/h).

[63] The unusual severity of the winter weather led to the closure of Interstate 10, which stranded dozens of travelers that had to seek shelter in two school gyms in Marfa.

[46] On January 12, a low pressure came ashore in the Pacific Northwest, causing heavy rain, mountain snow, and damaging winds in much of Washington, Oregon and British Columbia.

[67] It then moved into the Great Plains and Upper Midwest, bringing damaging winds along with heavy snow, prompting Winter Storm and Blizzard Warnings in many of those areas.

[72] Overnight, the storm also caused severe weather in the Southeast, including a tornado in Fultondale, Alabama which killed one person and injured many others.

[82] Shortly thereafter, the storm developed into a nor'easter and began moving up the coast slowly, dumping excessive amounts of snow on the I-95 corridor.

The City of Louisville Department of Public Works began preparing for a mass pre-treatment of the roads in the area, getting thousands of tons of salt and brine ready.

[99] On February 10, Delta Airlines flight 2231 slid off a taxiway prior to takeoff due to ice accumulations at Pittsburgh International Airport, although there were no casualties.

Additionally, downed trees and powerlines caused significant disruption in Virginia, where a winter weather state of emergency was placed into effect.

[110][111] The storm caused blackouts for nearly 10 million customers in the United States and in northern Mexico, triggering a severe power crisis in Texas in the process.

[120] On February 28, an Arctic airmass began working its way south into southern Canada, behind a low pressure system in a trough in the jet stream.

The next day, the powerful low pressure swung northeastward into the Canadian Maritimes, as two cold fronts behind the system ushered in an Arctic airmass into the Northeast and New England.

[135] On the following day, near-zero visibility was reported in the area for hours in a row,[136] causing numerous crashes and bringing parts of Highway 70 to a standstill.

[95] Del Rio, Texas picked up 9.7 inches (25 cm) of snow from February 17–18, breaking the all-time one-day and 24-hour snowfall records, both of which had previously been set in January 1985.

[164] In the city of Saltillo, temperatures reached as low as −4.5 °C (23.9 °F) early on February 16 as bitterly cold air continental polar surged south from Canada and the United States into Mexico.