A relentless storm is unleashing floods and tornadoes. Here's how a warmer atmosphere and a simmering Gulf of Mexico may be making it worse.

California's snowpack in the Sierra Nevada mountains measures 96% of average. It's the third straight year the state has had ...

Tornadoes ripped across a wide swath of central and southern United States on Wednesday, destroying homes and businesses and ...

El Nino-Southern Oscillation, or ENSO, neutral conditions are expected to develop and persist through the Northern Hemisphere summer, with a greater than 50% chance through August-October, the United ...

Reising noted that Southern California has experienced roughly 50% of its average annual rainfall. Sierra Nevada snow provides cold runoff that feeds rivers and reservoirs and helps support fish ...

primarily southern Ontario, is expected to receive the most snowfall. There is a good chance of snowfall in Montreal and Ottawa. The Great Lakes and the Northeastern United States will see a ...