Animation Offers Unique Look at Week-Long Cold Snap

It's been colder than usual this week in most of the U.S. If you've been watching weather reports and the maps that go with them, you've seen snapshots depicting that cold air blanketing the nation.

To get a more comprehensive view of what's been happening all week, take a look at this fascinating animation from the National Oceanic and Atmospheric Administration (NOAA), commonly known as the National Weather Service. Those trusty weather watchers say a drop in the jet stream caused a week-long cold snap across the country.

This animated graphic shows how temperatures changed across the U.S. between last Saturday and today. To create the animation, the NOAA used a series of data…
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