Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season.

Tens of millions of people are in the path of a major winter storm. Federal cuts threaten efforts to understand the causes of such weather.

The majority of the United States will experience chilling temperatures due to a blast of arctic air from Canada. The Midwest ...

A severe winter storm that brought crippling freezing rain, sleet and snow to a large part of the U.S. in late January 2026 left a mess in states from New Mexico to New England. Hundreds of thousands ...

The summer of 2025 brought unprecedented flash flooding across the U.S., with the central and eastern regions hit particularly hard. These storms claimed hundreds of lives across Texas, Kentucky and ...

The polar vortex is a large-scale weather pattern that typically keeps the coldest air confined to the Arctic region. However, during winter months, this vortex can become unstable, leading to ...

When the polar vortex stumbles, the weather at ground level can pivot from mild to brutal in a matter of days. A circulation that usually spins quietly above the pole can suddenly send lobes of Arctic ...