Here’s What’s Causing the East Coast’s Absurdly Warm Weather

Hint: It’s not global warming.

A ski lift, but no snow, at Campgaw Mountain Ski Area in Mahwah, New Jersey.Kevin R. Wexler/Northjersey.com via AP


This story originally appeared in the Huffington Post and is reproduced here as part of the Climate Desk collaboration.

The weather’s been positively toasty across much of the East Coast over the past several days, especially for a December. In New York, Sunday temperatures shattered a 30-year-old record, hitting 70 degrees Fahrenheit. And the month has been chock-full of 60-plus days.

So what’s going on? Is this a climate change thing, or a welcome boon from the ongoing El Niño tropical weather event? The answer actually lies with a buzzword from 2014’s equally extreme temperatures: the polar vortex.

Mike Halpert, deputy director of the Climate Prediction Center at the National Weather Service, said last week the band of cold air surrounding the arctic—called the “Arctic Oscillation“—is particularly tight right now. During the polar vortex, pressure changes in that band of air caused it to slow and slip down towards America, bringing with it a wave of Arctic air that led to well below zero temperatures.

This time around, all of that frigidity is being kept north, causing the far more pleasant temperatures experienced around the east coast.

Meanwhile on the West Coast, a series of storm systems is expected to bring more rain and cover the Northwest and Rockies with snow this week.

In terms of El Niño, weather patterns could certainly shift as the phenomenon is expected to continue through early 2016. But the weather event isn’t to blame, despite forecasts it would lead to a particularly warm winter for some parts of the United States.

Some meteorologists have warned the Arctic Oscillation could slip as winter carries on, leading to a sudden downturn in temperatures. But if you’re holding on to hope for a white Christmas and some skiing over the holiday break, you’ll have to tough it out. The weather will be as fickle as always.

More Mother Jones reporting on Climate Desk

AN IMPORTANT UPDATE

We’re falling behind our online fundraising goals and we can’t sustain coming up short on donations month after month. Perhaps you’ve heard? It is impossibly hard in the news business right now, with layoffs intensifying and fancy new startups and funding going kaput.

The crisis facing journalism and democracy isn’t going away anytime soon. And neither is Mother Jones, our readers, or our unique way of doing in-depth reporting that exists to bring about change.

Which is exactly why, despite the challenges we face, we just took a big gulp and joined forces with the Center for Investigative Reporting, a team of ace journalists who create the amazing podcast and public radio show Reveal.

If you can part with even just a few bucks, please help us pick up the pace of donations. We simply can’t afford to keep falling behind on our fundraising targets month after month.

Editor-in-Chief Clara Jeffery said it well to our team recently, and that team 100 percent includes readers like you who make it all possible: “This is a year to prove that we can pull off this merger, grow our audiences and impact, attract more funding and keep growing. More broadly, it’s a year when the very future of both journalism and democracy is on the line. We have to go for every important story, every reader/listener/viewer, and leave it all on the field. I’m very proud of all the hard work that’s gotten us to this moment, and confident that we can meet it.”

Let’s do this. If you can right now, please support Mother Jones and investigative journalism with an urgently needed donation today.

payment methods

AN IMPORTANT UPDATE

We’re falling behind our online fundraising goals and we can’t sustain coming up short on donations month after month. Perhaps you’ve heard? It is impossibly hard in the news business right now, with layoffs intensifying and fancy new startups and funding going kaput.

The crisis facing journalism and democracy isn’t going away anytime soon. And neither is Mother Jones, our readers, or our unique way of doing in-depth reporting that exists to bring about change.

Which is exactly why, despite the challenges we face, we just took a big gulp and joined forces with the Center for Investigative Reporting, a team of ace journalists who create the amazing podcast and public radio show Reveal.

If you can part with even just a few bucks, please help us pick up the pace of donations. We simply can’t afford to keep falling behind on our fundraising targets month after month.

Editor-in-Chief Clara Jeffery said it well to our team recently, and that team 100 percent includes readers like you who make it all possible: “This is a year to prove that we can pull off this merger, grow our audiences and impact, attract more funding and keep growing. More broadly, it’s a year when the very future of both journalism and democracy is on the line. We have to go for every important story, every reader/listener/viewer, and leave it all on the field. I’m very proud of all the hard work that’s gotten us to this moment, and confident that we can meet it.”

Let’s do this. If you can right now, please support Mother Jones and investigative journalism with an urgently needed donation today.

payment methods

We Recommend

Latest

Sign up for our free newsletter

Subscribe to the Mother Jones Daily to have our top stories delivered directly to your inbox.

Get our award-winning magazine

Save big on a full year of investigations, ideas, and insights.

Subscribe

Support our journalism

Help Mother Jones' reporters dig deep with a tax-deductible donation.

Donate