Brace yourself for a winter storm like no other—because while the U.S. has been basking in an unusually mild winter, that very warmth might be fueling the ferocious storm now barreling across the country. But here's where it gets controversial: Could this extreme weather be a paradoxical side effect of a warming planet? Let’s dive in.
In late January 2026, a severe winter storm swept across the central and eastern U.S., unleashing crippling freezing rain, sleet, and snow from Texas to New England. Governors declared states of emergency as forecasters warned of hazardous travel, bone-chilling wind chills, and prolonged power outages. This sudden arctic blast felt like a rude awakening after a deceptively gentle winter start—but that earlier warmth might have played a role in the storm’s intensity.
As atmospheric and climate scientists, we study extreme weather events, exploring what drives them and how climate change fits into the picture. To understand this storm, we need to look far above Earth’s surface—over 20 miles up—to the stratospheric polar vortex. And this is the part most people miss: It’s not just about cold air moving south; it’s about complex interactions between the stratosphere and the weather systems below.
So, what creates a monster storm like this? It’s a perfect storm (pun intended) of factors. Winter storms thrive where sharp temperature contrasts meet a southward dip in the jet stream—that fast-moving band of air steering weather systems. Add a hefty moisture source, like the warm Gulf of Mexico, and you’ve got a recipe for heavy precipitation. In this case, a strong Arctic air mass clashed with warmer southern air, while multiple jet stream disturbances teamed up to create ideal conditions for chaos.
Now, enter the polar vortex. You’ve likely heard the term when Arctic air spills south, but it’s more than that. The stratospheric polar vortex is a high-altitude, fast-moving air belt circling the North Pole—like a second jet stream. When it stretches southward, it triggers vertical atmospheric waves that link the stratosphere to surface-level winter weather. In late January, this vortex overlapped perfectly with the jet stream over the U.S., setting the stage for extreme cold and snow.
Here’s the kicker: If the planet is warming, why are we still getting these brutal storms? While Earth is undeniably heating up due to greenhouse gases, and overall snowfall is declining, severe winter weather isn’t going extinct. Some research suggests cold events, though less frequent, may still pack a punch in certain regions. One reason? Increasing disruptions to the polar vortex, possibly linked to the Arctic’s rapid warming. Plus, warmer oceans mean more evaporation, and a warmer atmosphere holds more moisture—fueling heavier storms. However, warming can also weaken storms by reducing temperature contrasts, creating a complex tug-of-war.
But here’s the real debate: Are the most intense storms getting even worse? Some studies say yes, pointing to factors like increased moisture availability. Meanwhile, a warmer climate also shifts precipitation types, turning snow into sleet or freezing rain. It’s a nuanced picture, and scientists are still piecing it together.
Despite progress, many questions remain. Much of our understanding relies on federal research institutions like the National Center for Atmospheric Research (NCAR), which have faced funding threats. These scientists develop the models and tools forecasters depend on—yet their work is often under siege. So, here’s a question for you: How should we balance climate research funding with immediate economic concerns? Let us know in the comments.
Mathew Barlow, Professor of Climate Science, UMass Lowell
Judah Cohen, Climate Scientist, Massachusetts Institute of Technology (MIT)
