"The storms which prompted the warning have moved out of the area. Therefore, the warning will be allowed to expire. A Tornado Watch remains in effect until 3 a.m. for southeastern and east central Alabama," according to the National Weather Service.

At 9:34 a.m. on Sunday, the NWS Raleigh NC issued a tornado warning in effect until 10 a.m. for Stanly County. "At 9:34 a.m., a severe thunderstorm capable of producing a tornado was located 7 miles south of Plyler,

On Sunday at 9:09 a.m. a severe thunderstorm warning was issued by the NWS Greenville-Spartanburg SC in effect until 9:45 a.m. for Union County. Residents should be prepared for wind gusts of up to 60 mph.

We all hear the terms when there's a threat of severe weather. But what does each alert mean, and how does it affect you?

It marks only the third time since at least 2006 that the highest risk level has been issued the day before an expected outbreak.