Supercell thunderstorms could produce multiple long-lived EF3 or stronger tornadoes today in the mid-Mississippi and lower Ohio valleys. Tornadoes, destructive straight-line winds and damaging hail will also impact a much larger area of the Midwest and South.

We're tracking an expected tornado outbreak today, with severe weather threatening millions across multiple states. Here is the latest.

These are the most dire outlooks for severe weather NOAA's Storm Prediction Center issues. Here's what they mean and what you should know.

Double-digit rainfall totals are forecast, prompting the National Weather Service to issue “particularly dangerous situation” flood watches in some areas from Wednesday into Saturday. Serious flash flooding and flooding of rivers, creeks and streams can be expected.

Passengers aboard a cruise ship returning from Antarctica faced a terrifying ride through the infamous Drake Passage, as 30- to 40-foot swells crashed into the ship. They described the 48-hour ordeal as feeling like a relentless roller coaster at sea.