(CNN) A weakened Subtropical Storm Alberto made landfall Monday afternoon in the Florida Panhandle, showering the Southeast with rain and killing at least two people.

The storm is threatening the Southeast with flooding as it is expected to spread moisture across the region into the middle of the week.

Alberto's winds continued to slow down throughout Monday, reaching maximum sustained winds of 45 mph as it made landfall in Laguna Beach, west of Panama City on the northern Gulf Coast, according to the National Hurricane Center. The winds decreased to 40 mph by Monday night, when the storm was moving north at close to 10 mph.

North Carolina Gov. Roy Cooper said the two died due to storm-related conditions. "North Carolina needs to take Alberto seriously," Cooper said in a news release.