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Pacific Storm Builds a Ridge over Western North America: An example of a Pacific
cyclone’s role in ridge development over western North America took place during mid-November 2001.
Because this event occurred so early in the winter season, it did not lead to the type of bitter cold outbreak
that might have ensued in January or February.
Data courtesy of NCEP
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The cold outbreaks of 2004 in the northeastern United States:
January and February 2004 brought record breaking low temperatures to the Northeastern United States.
During the three coldest episodes in January, most of the region remained below
0°F even during the afternoon and Boston recorded its coldest January since 1893.
Data courtesy of NCEP
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Edition 1 -
A cold air outbreak occurred in February 2002 in the Central United States:
A cold air outbreak in February 2002 brought below normal temperatures tomuch of the United States. The upper
air flow patterns show the channeling effect of the Rocky Mountains. Actual surface temperatures in the Northern
Plains fell to well below 0° F.
Data courtesy of NCEP
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| Related Web Sites |
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Current Cold Weather Warnings
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Monitor the National Weather Service watches and warnings to determine if a cold air outbreak is likely to
occur in the near future.
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Alaska-Polar Weather
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Monitor conditions across North America, Northern Europe and Asia and the North Pole to identify signs of
a cold air outbreak.
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The Cryosphere Today
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Examine the current snow and sea ice conditions for the Arctic and Antarctic.
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Northern Europe Current Weather
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Watch the weather conditions for signs of a cold air outbreak in Europe.
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