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.

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.

Ingredients are in place for a potent severe weather outbreak in the Ohio and Mississippi valleys. Several strong (EF2+) and long-track tornadoes are possible late Wednesday into overnight from northern Louisiana to Indiana and western Ohio, including the cities of Shreveport, Little Rock, Louisville, Memphis, Indianapolis, and Cincinnati. This outbreak is being driven by a slow-moving system that will linger as it tracks eastward. Stay alert and have a plan in place.

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.