Dense Fog Advisory: Straits of Mackinac within 5 nm of Mackinac Bridge including Mackinac Island; 5NM East of Mackinac Bridge to Presque Isle Light MI including Bois Blanc Island; Presque Isle Light to Sturgeon Pt MI Including Thunder Bay National Marine Sanctuary; Grand Traverse Bay south of a line Grand Traverse Light to Norwood MI; Seul Choix Point to 5NM West of Mackinac Bridge; Norwood MI to 5NM West of Mackinac Bridge including Little Traverse Bay; Sleeping Bear Point to Grand Traverse Light MI; Point Betsie to Sleeping Bear Point MI

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Dense Fog Advisory — Straits of Mackinac within 5 nm of Mackinac Bridge including Mackinac Island; 5NM East of Mackinac Bridge to Presque Isle Light MI including Bois Blanc Island; Presque Isle Light to Sturgeon Pt MI Including Thunder Bay National Marine Sanctuary; Grand Traverse Bay south of a line Grand Traverse Light to Norwood MI; Seul Choix Point to 5NM West of Mackinac Bridge; Norwood MI to 5NM West of Mackinac Bridge including Little Traverse Bay; Sleeping Bear Point to Grand Traverse Light MI; Point Betsie to Sleeping Bear Point MI Severity: Minor. Certainty: Likely. * WHAT...Dense fog will reduce visibility to 1/4 NM or less. * WHERE...Portions of Lake Huron and Lake Michigan. * WHEN...Until noon EDT Friday. * IMPACTS...Low visibility will make navigation difficult.