Fierce winds overturned boats at a marina in northern Alabama, damaged some buildings in Calhoun County and brought down trees in other parts of the state after thunderstorms moved in overnight. National Weather Service meteorologists say that survey teams were being sent to hard-hit areas in northern Alabama to assess whether damage was caused by straight-line winds or possibly tornadoes. An emergency manager reported that storms caused significant damage at a resort and marina along the Tennessee River west of Athens, overturning boats and blowing rooftops off. In the Fort Payne area, an emergency manager reported the roof of an apartment complex was blown off. Officials say, there was also a report of a semitrailer blown into an industrial building near the north side of Fort Payne.