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  2. 1985 North American cold wave - Wikipedia

    en.wikipedia.org/wiki/1985_North_American_cold_wave

    A map of the United States detailing the record-low temperatures for various cities on January 21, 1985. The 1985 North America cold wave [1] was a meteorological event which occurred in January, 1985, as a result of the shifting of the polar vortex farther south than is normally seen. [1]

  3. December 2017–January 2018 North American cold wave

    en.wikipedia.org/wiki/December_2017–January...

    Part of the 2017–18 North American winter. The December 2017–January 2018 North American cold wave was an extreme weather event in North America in which record low temperatures gripped much of the Central, Eastern United States, and parts of Central and Eastern Canada. Starting in late December as a result of the southward shift of the ...

  4. January–February 2019 North American cold wave - Wikipedia

    en.wikipedia.org/wiki/January–February_2019...

    In late January 2019, a severe cold wave caused by a weakened jet stream around the Arctic polar vortex [5] hit the Midwestern United States and Eastern Canada, killing at least 22 people. [3][4] It came after a winter storm brought up to 13 inches (33 cm) of snow in some regions from January 27–29, and brought the coldest temperatures in ...

  5. Chicago: Blizzard conditions to precede 'ferocious' Arctic air

    www.aol.com/weather/chicago-blizzard-conditions...

    One of the most recent blizzards in Chicago took place on Feb. 1-2, 2011, when over 20 inches of snow piled up in Chicago.The powerful storm responsible for the blizzard also dealt wintry weather ...

  6. January–March 2014 North American cold wave - Wikipedia

    en.wikipedia.org/wiki/January–March_2014_North...

    The January–March 2014 North American cold wave was an extreme weather event that extended through the late winter months of the 2013–2014 winter season, and was also part of an unusually cold winter affecting parts of Canada and parts of the north-central and northeastern United States. [5] The event occurred in early 2014 and was caused ...

  7. 1994 North American cold wave - Wikipedia

    en.wikipedia.org/wiki/1994_North_American_cold_wave

    The 1994 North American cold wave occurred over the midwestern and eastern regions of the United States and southern Canada in January 1994. The cold wave caused over 100 deaths in the United States. Two notable cold air events took place from January 18–19 and January 21–22. There were 67 minimum temperature records set on January 19. [1]

  8. Air mass - Wikipedia

    en.wikipedia.org/wiki/Air_mass

    In meteorology, an air mass is a volume of air defined by its temperature and humidity. Air masses cover many hundreds or thousands of square miles, and adapt to the characteristics of the surface below them. They are classified according to latitude and their continental or maritime source regions. Colder air masses are termed polar or arctic ...

  9. Arctic oscillation - Wikipedia

    en.wikipedia.org/wiki/Arctic_oscillation

    The greatest negative value for the Arctic oscillation since 1950 in January was −3.767 in 1977, which coincided with the coldest mean January temperature in New York City, Washington, D.C., Baltimore, and many other mid-Atlantic locations in that span of time, although the January Arctic oscillation has been negative only 60.6% of the time ...

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