U.S. forecasts blizzard, polar vortex, heat dome and atmospheric river all at once

U.S. forecasts blizzard, polar vortex, heat dome and atmospheric river all at once

PBS nation

Key Points:

  • "All of the country, even if you're not necessarily seeing extremes, are going to see generally changing from cold to warm, or warm to cold to warm," said meteorologist Marc Chenard of the National We

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