What happened in the winter of 2013-14?

The winter of 2013–14 was one of the most significant for the United States, due in part to the breakdown of the polar vortex in November 2013, which allowed very cold air to travel down into the United States, leading to an extended period of very cold temperatures.

What was the February 2021 North American cold wave?

The February 2021 North American cold wave was an extreme weather event that brought record cold temperatures to a significant portion of Canada, the United States and parts of northern Mexico during the first half of February 2021.

Where did the cold wave come from?

As with most cold waves, the origins of the cold wave occurred when the jet stream migrated southward in early February 2021, allowing bitterly cold air from the polar vortex to spill south into the Upper Midwest and Great Plains.

How many flights were cancelled due to snow in 2013?

As of November 27, 2013, 475 flights had been cancelled, with 3,600 delays, many in the New York City and Philadelphia areas. Snow turned to rain in Pittsburgh despite an ominous forecast, but 9 inches fell in Mercer County, Pennsylvania, and 4.5 inches in Buffalo.

How much snow did it snow in 2014?

2014 began on an active note, with a major winter storm affecting much of the United States. Between 6 and 12 inches (150 and 300 mm) of snow fell across a wide area spreading from central Missouri across Illinois and Indiana to Lower Michigan.

When does winter start and end?

Based on the astronomical definition, winter begins at the winter solstice, which in 2013 occurred on December 21, and ends at the March equinox, which in 2014 occurred on March 20. Based on the meteorological definition, the first day of winter is December 1 and the last day February 28.