When roses are blooming in January in New York City, maybe you should start thinking about climate change. (Photo: Jim Naureckas)
Anchor Lester Holt remarked at the top of the broadcast:
Strange winter. Why it is so cold where it should be warm, and so warm where it should be cold? What is going on with all this extreme weather?
To answer the question, he turned to correspondent Kristen Dahlgren, who went to the Weather Channel‘s Greg Postel, who gave this explanation:
A very strong dip in the jet stream has placed itself over the western part of the country and that’s allowed some very cold air from Canada to move southward.
That’s true as far as it goes–but it didn’t go any farther. Specifically, it never mentioned climate change–something that has been linked to disruptions in the jet stream’s traditional path. As the blog ClimateSight (12/19/12) explained: ….(read more).