Heavy storms, tornadoes and 'tennis ball-sized hail' to hit the southern Plains

Stormy weather on Tuesday is expected to bring severe thunderstorms, flash flooding, potentially strong tornadoes, and hurricane-force winds to the southern Plains and several Southeastern states.

Stormy weather on Tuesday is expected to bring severe thunderstorms, flash flooding, potentially strong tornadoes, and hurricane-force winds to the southern Plains and several Southeastern states.

An enhanced warning covered almost all of Tennessee and Kentucky, affecting 13.6 million people, the National Oceanic and Atmospheric Administration said.

Isolated "tennis ball-sized" hail is possible in some places and tornadoes could reach speeds of 95 mph, NOAA's Storm Prediction Center said.

Another 23 million people are under a slight risk of severe weather, from Indianapolis to Atlanta.

Memphis, Nashville, Lexington, Louisville, Paducah, Birmingham, Indianapolis, Atlanta, St. Louis, and Knoxville are among the cities in the risk zone on Tuesday.