[9] The nor'easter's effects in the United States received a Category 3 rank on the Northeast Snowfall Impact Scale, classifying it as a "Major" Winter Storm.

The first low-pressure system, originating from the Northern Plains of the United States, produced moderate amounts of snow across the Great Lakes region of the U.S. and Canada.

[10] The second low, originating across the state of Texas, produced heavy rains and flooding across much of the Southeast and Mid-Atlantic parts of the U.S. As the two systems merged off the Northeast coast on February 8, 2013, they produced heavy snowfall over a large region from North Jersey and inland from New York City through eastern New England up to coastal Maine and inland to Ontario.

Flights at many major airports across the region were canceled, and travel bans were put into place on February 8 in several states.

[26] Fueled by energy originating from the Gulf of Alaska and carried by the polar jet stream, a low-pressure area formed as anticipated in Montana, at 1200 UTC the next day.

[32] A few hours later, the southern disturbance began a phase of barometric deepening as it tracked northeastward off the Outer Banks, while the northern system maintained an easterly course into northwestern Ohio.

[36] At 2100 UTC on February 9, the extratropical cyclone reached its peak intensity with a minimum barometric pressure of 968 millibars (28.6 inHg) while located roughly 200 mi (320 km) off the coast of Massachusetts.

[37] After reaching peak intensity the system began to steadily weaken and depart the coast of New England, tracking near Nova Scotia early on February 10, upon which the HPC issued their final storm summary bulletin.

By February 13, the storm system had tracked just south of Iceland,[39] bringing a cold and warm front into the British Isles.

[47] In the Maritimes, blizzard warnings were in effect for parts of New Brunswick[48] and all of Nova Scotia and Prince Edward Island, with more than 50 centimetres (20 in) possible.

There was also a blizzard warning for the New York metropolitan area, all of Connecticut, all of Rhode Island, and eastern Massachusetts, as well as southeast New Hampshire and coastal Maine.

[52] In Chicago, officials deployed 199 snow trucks, and the Illinois State Toll Highway Authority sent 182 plows for its road system.

[53] In the northeast United States, the storm threatened beaches and dunes in areas affected by Hurricane Sandy from the previous October.

[59] Rhode Island Governor Lincoln Chafee declared a state of emergency on February 8, and issued a travel ban for interstates and other major highways effective 5 p.m.

[62][63] The Massachusetts Bay Transportation Authority (MBTA) suspended subway, commuter rail, bus, and boat service at 3:30 p.m. on February 8,[64] and flights at Boston Logan International Airport were suspended at 4:00 p.m.[65] Boston mayor Thomas Menino ordered schools to close and recommended that businesses shut down during the storm.

[69] Approximately 2,295 National Guard soldiers and airmen were activated in Connecticut, Massachusetts, Rhode Island, and New York to support actions needed on state roads.

[70][71] The Met Office issued an amber warning for snow and ice for the weakened storm for between 09:05 till 23:55 GMT on Wednesday 13 February.

[73] The storm brought snow and high winds to Toronto, Ottawa and Montreal, as well as extensive flooding to parts of Nova Scotia and New Brunswick.

Power was disrupted for thousands of customers in Atlantic Canada, and dozens of flights were canceled at Halifax Stanfield International Airport on February 9.

[74] Snow and rainfall began at 9 a.m. on February 8 across New England; by late that day, totals reached 8 in (20 cm) near Milton, Vermont.

[77] Early on February 9, mandatory evacuations were ordered for Massachusetts coastal regions near the town of Hull due to possible flooding and high winds.

[78] Parts of coastal New England experienced hurricane-force winds from the storm, with a peak gust of 89 mph (143 km/h) in Mount Desert Rock, Maine.

[99] The westbound side of the Long Island Expressway opened early Monday[clarification needed] morning, while the eastbound lanes between exits 57 and 73 remained closed for snow removal.

[102] A house in Long Island suffered major structural damage due to heavy snow accumulation on the roof.

[103] The Boston Bruins postponed their afternoon home game on Saturday, February 9 at the TD Garden against the Tampa Bay Lightning to Thursday, April 25.

[104] The Mohegan Sun resort casino in Connecticut postponed a Saturday[clarification needed] night Bon Jovi concert, but the band played for the snowbound guests.

[105] The United States Postal Service (USPS) suspended mail delivery in Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont, and parts of New York during and after the storm.

[114] In Boston, Massachusetts, a 13-year-old boy and a man died separately due to carbon monoxide poisoning while inside cars because the tailpipes were blocked by snow.

[21][115] A man was killed in an automobile accident in Auburn, New Hampshire when his car spun out on a hill and collided with a tree, flattening the front end of his SUV and crushing him.