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?

Tornadoes may hit the Mississippi Valley on Friday, as well as blizzards in the northern Plains and gusty conditions in Texas that pose a high risk of wildfires.

Huntsville and Madison County officials are urging residents to make emergency plans ahead of a long-lasting severe weather system expected to arrive in north Alabama within hours. The National Weather Service says an outbreak of severe storms will be possible statewide throughout Saturday.

The threat of tornadoes is moving east into the Mississippi Valley and Deep South a day after a massive storm system moving across the country unleashed winds that damaged buildings, whipped up dust s

The dangerous outbreak will sweep through the Midwest, South and East through the weekend. Saturday could be one of the worst severe weather days of the year.