Alberto to make landfall on Florida's Panhandle on Memorial Day

Flooding will remain the greatest concern across the southeastern United States as Alberto churns northward with an expected Memorial Day landfall on the Florida Panhandle.

Governors of Florida, Mississippi and Alabama have declared states of emergencies ahead of the advancing subtropical storm.

Alberto is not expected to strengthen into a hurricane but will still pose dangers to residents and those on vacation across the Southeast by unleashing widespread heavy rain. Damaging winds, isolated tornadoes and storm surge flooding are other hazards.