The National Weather Service's Storm Prediction Center said that more than 5 million people were at "enhanced risk" of severe weather on Tuesday, with a dangerous storm system expected to bring tornad

When a warning is issued, take action. This means tornado conditions are imminent and have been spotted either by someone on the ground or by radar. Warning areas are typically smaller than those within a watch and are issued for a shorter time period, typically about 15 minutes.

Tornado Watch. This alert signifies that current weather conditions are conducive to the formation of tornadoes. It doesn't confirm that a tornado has developed but indicates that