Supercell thunderstorms are dangerous storms that unleash large hail, roaring winds and powerful tornadoes.

(CNN) — A nasty coastal storm, known as a nor’easter, is organizing and strengthening off the Southeast US. The storm is poised to deliver tropical storm-force wind gusts, soaking rain and dangerous ...

(CNN) — Punxsutawney Phil, the groundhog weather icon, saw his shadow when he was plucked from his warm burrow and thrust out into the frigid air Monday morning. According to Phil, that means six more ...

(CNN) — Record cold temperatures have pushed as far south as Florida this morning as wind-whipped snow continues to pile up in the eastern Great Lakes from a brief bout of Arctic air gripping the ...

(CNN) — Tropical Storm Melissa is crawling through the Caribbean Sea, threatening to unleash life-threatening flooding and mudslides across parts of the region later this week. It’s proof this year’s ...

(CNN) — A marine heat wave spanning much of the North Pacific Ocean is already influencing the weather in North America and is poised to make its mark on winter. The unusually warm ocean water, coined ...

(CNN) — High above the North Pole, in a slice of atmosphere rarely noticed and even less understood, a transformation is underway. Over the next 10 days, changes in the stratosphere will upend weather ...

(CNN) — A major winter storm is spreading heavy snow and damaging ice across a large portion of the United States. Extremely cold temperatures will only worsen the storm and increase its danger. The ...

(CNN) — A powerful winter storm swept across the central and eastern United States, knocking out power and snarling travel during one of the busiest stretches of the holiday season. The wide-ranging ...

(CNN) — A potent winter storm will impact the Northeast starting on Sunday, but there are still questions about how big its punch of snow and strong winds will be for some areas. Snow totals and the ...

(CNN) — The US is a nation divided, with frigid conditions, snow and ice entrenched east of the Rockies all the way into Florida, and record warmth and paltry snowfall in the West. The dichotomy has ...