The Latest on severe weather in the Southeast (all times local):

12:55 p.m.

The National Weather Service says a small tornado is responsible for destroying farm buildings and causing other damage in northeast Alabama.

The weather service says a team found damage from an EF-1 tornado with winds estimated at 90 mph (145 kph) after storms moved through Blount County early Monday.

A barn and other rural buildings were damaged or destroyed, and one person was reported hurt.

The weather service team is checking other damage that occurred elsewhere, and storms are still moving across the region.

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11 a.m.

A strong storm moving across northeast Alabama knocked down power lines and caused scattered damage in a retail district and forecasters said more bad weather was on the way.

Photos shared on social media showed plants and other items thrown around the parking lot of a Walmart store in Guntersville, Alabama, during Monday's storm. Nearby stores had to close because of power outages.

High winds left trees tilted sideways and utility lines drooped toward the ground. Farm buildings were damaged in rural Blount County, Alabama, where one person was reported injured.

The National Weather Service issued tornado warnings after radar indicated a possible twister. The weather service office in Huntsville said it was sending a team to determine whether a tornado caused damage.

The Storm Prediction Center says 26 million people were at a slight risk of severe storms in Mississippi, Alabama, Georgia and the Carolinas.