Buffalo, New York, put an exclamation mark on the cold Sunday as it logged its coldest day in 21 years. The day's high of 2 degrees – observed at 12:20 a.m. – was the city's coldest since Jan. 19, 1994, as was the daily mean temperature of 4 below zero. Shortly before midnight at the end of the day, the mercury touched 10 below zero for the first time since Jan. 6, 1996. It was the coldest February temperature in Buffalo since 1979.

New York City's Central Park dropped to 4 degrees just before the end of Sunday, tying the low of 4 during the so-called "Polar Vortex" cold snap on Jan. 7, 2014. The temperature then fell to 3 degrees on Monday morning, making it the coldest reading in the Big Apple since Jan. 16, 2004.