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Here’s what’s causing weird temperatures this winter [Video]

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Climate Change News

In all weather science, it’s virtually impossible to directly attribute any individual phenomenon to one specific cause.

CHICAGO — A powerful winter storm was dumping deep snow in parts of the West on Monday and much of the central U.S. was unseasonably warm: People played golf in Wisconsin and comfortably walked their dogs in Iowa, where some bulbs were starting to flower. And high winds hiked fire risks in several states.

Why was it happening?

THE JET STREAM

This band of strong winds keeps warm air, which blows up from the south, trapped below cold air that comes down from the north. The jet stream constantly shifts. Recently, it’s been sitting far north enough to mean that warm air has been blasting the normally frigid Upper Midwest.

“The orientation of it right now is not very winter-like,” said Andrew Orrison, a meteorologist with the National Weather Service in College Park, Maryland.

GLOBAL WARMING

In all weather science, it’s virtually …

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