Devastating, life-threatening floods have already started in some states as an atmospheric river causes heavy rainfall.

Severe thunderstorms are expected to smack 12 states in the Midwest and South over the weekend, with some tornadoes possible.

Track the storms live here with updating radar and forecast maps for all facets of the severe weather threat: ...

Flooding is the major concern for communities in Tennessee as heavy rain lingers. Find out where rivers are flooding with our flood map.