Live updates: Life-threatening storms target the Heartland, intense tornadoes and huge hail possible
When severe weather is happening, meteorologists at the National Weather Service will issue a variety of alerts to keep you informed about the dangers you could face with tornadoes.When severe weather is happening, meteorologists at the National Weather Service will issue a variety of alerts to keep you informed about the dangers you could face with tornadoes.Dangerous flash flooding is unfolding across parts of Michigan and Wisconsin after days of heavy rain from severe storms and rapid snowmelt have pushed rivers into major flood stages and forced evacuations.
Supercells are the least common type of thunderstorm, but they often produce some of the most violent weather.