Why the East Coast is warmer than the West Coast in the middle of December

No, this one isn't directly because of global warming.

You can pin this month's weird weather flip on the record-breaking El Niño weather pattern that's happening this year.

It's pushed the jet stream, which usually keeps the East Coast cool, up north. That's what's giving the East Coast spring-like temperatures.

At the same time, a storm that blew through the West Coast over the weekend brought chilly weather to the West Coast. That's why the weather in Los Angeles (at noon Eastern Time, it was 48 degrees Fahrenheit there) is a few degrees colder than New York (which was 54 degrees Fahrenheit at the same time).

So if you're dreaming of a White Christmas and you live out east, don't hold your breath. This warmth will likely stick around the East Coast through the holidays. 

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