These are the most dire outlooks for severe weather NOAA's Storm Prediction Center issues. Here's what they mean and what you should know.

A dynamic storm system threatening to spawn powerful tornadoes and hail as big as baseballs has earned a relatively rare designation from forecasters.

A multi-day tornado threat is unfolding across several U.S. states, with severe storms capable of producing damaging winds, large hail, and tornadoes. Meteorologist Rhythm Reet from The Weather Network breaks down the details.