The Great Blizzard of 1899, also known as the Great Arctic Outbreak of 1899 and the St. Valentine's Day Blizzard, was an exceptionally severe winter weather event that affected most of the United States, particularly east of the Rocky Mountains.

On February 11, Swift Current in present-day Saskatchewan reported a record-high barometric pressure of 31.42 inches of mercury (1,064 mb).

[3]: 1 For the 1895–2017 period of record: The following low temperatures occurred during the last ten days of January and the first three weeks of February.

[37] For the 1895–2017 period of record in the Northern Rockies and Plains climate region: Second-coldest February, 1895–2017.

[70] For the 1895–2017 period of record in the Ohio Valley climate region: Sixth-coldest February, 1895–2017.

[189] For the 1895–2017 period of record in the Upper Midwest climate region: Third-coldest February, 1895–2017.

[223] On February 12, snow flurries were reported in the air from some areas from New Orleans eastward to Tampa.

[1] The storm crossed the Florida peninsula and intensified as it moved rapidly up the east coast.

[2] High Point, North Carolina recorded 10–12 inches (250–300 mm) of snow.

[226]) On February 19, ice floes were reported to be moving out of the Mississippi River into the Gulf of Mexico.

[125] The previous day, the city experienced its coldest-ever Mardi Gras low temperature of 7 °F (−13.9 °C).

[229] The Great Arctic Outbreak of 1899 had disastrous impact across many areas of the continental U.S. and Cuba as people, livestock, and wildlife succumbed to the frigid cold.

In Brooklyn, 31 year-old Mary Goodwin was frozen to death and a thinly clad, unidentified woman in The Dalles, Oregon was found frozen to death in a hallway in an attempt to find warmth.

It is believed that their boat, overturned by the high winds, was crushed by the floating ice.

Barges on the Mississippi river, which was in some parts entirely frozen through, and the Great Lakes were brought to a complete standstill by ice.