A fresh blast of Arctic air is poised to spill across a wide swath of the United States, and the latest polar vortex map ...

Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march ...

This pattern disrupts typical west-to-east jet stream flow, causing stagnant weather conditions, including cool, showery weather in the East and West, and mild, clear conditions in the north-central U ...

Storms headed to New England late Wednesday will bring mostly rain to Boston and Southern New England, with snow up north.

The jet stream, or any wind, is the result of differences in surface temperature. In simple terms, warm air rises, creating low pressure, and cold air sinks, creating high pressure. Wind is the ...