polar vortex


Hot Arctic and a Chill in the Northeast: What’s Behind the Gloomy Spring Weather?

, senior climate scientist

When temperatures lurk in the drizzly 40s and 50s well into flower season, northerners get impatient for summer. But when 80-degree temperatures visit the high Arctic, as they just did, and when sleet disrupts Mother’s Day weekend in May in Massachusetts, as it just did, thoughts turn to: What is going on here? Read more >

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Graphic: ClimateReanalyzer.org

Winter Storm Jayden, the Polar Vortex, and Climate Change: 3 Factors that Matter

, senior climate scientist

Temperatures are predicted to plummet across the Eastern US as one of the coldest air masses in decades settles into these regions. So zip up and cinch your scarves. Stay safe. And remember that despite this bitter chill, the planet is still heating up. Read more >

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The jet stream and polar vortex on January 3, 2017. Map from the University of Maine Climate Change Institute.

The Polar Vortex, Winter Storm Grayson, and Climate Change: What’s the Connection?

, senior climate scientist

Forecasters are trotting out “polar vortex” and atypical terms like “Nor’easter bomb” and “bombogenesis.” These words signal the unusual and dangerous conditions forecast for winter storm Grayson and their implications for the Southeast US,  Mid-Atlantic, and eventually New England and beyond. What do they mean?   Read more >

University of Maine Climate Change Institute
University of Maine Climate Change Institute
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El Niño vs. the Arctic: Which Will Dominate This Year’s Winter Weather?

, senior climate scientist

This past week, the American Geophysical Union (AGU) 2015 annual meeting was abuzz with discussion of El Niño 3.4 and the Arctic Oscillation. No wonder. These indicators are clues to how major competing factors may play out this winter in the northern hemisphere. Read more >

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It’s Cold Out But it’s Not the Polar Vortex

, , former scientist and Kendall Science Fellow

The “polar vortex” is synonymous with cold air blasts for Americans. But is it correct to equate polar air with the polar vortex? The answer is no. Read more >

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