* WHAT...Dense fog will reduce visibility to 1 NM or less.
* WHERE...In Lake Huron, Straits of Mackinac within 5 nm of Mackinac Bridge including Mackinac Island. In Lake Michigan, Seul Choix Point to 5NM West of Mackinac Bridge and Norwood MI to 5NM West of Mackinac Bridge including Little Traverse Bay.
* WHEN...Until 2 PM EDT this afternoon.
* IMPACTS...Areas of low visibility will make navigation difficult.