LH 421

• Buoys / Water Temps
• Wave Heights

Click any area for a Zone forecast. Click the Station ID for station data.

Global Marine Zone Map

• Bay of Green Bay North of line from Cedar River MI to Rock Island Passage
• Seul Choix Point to Point Detour MI
• Lake Michigan, from Seul Choix Point to Rock Island Passage
• Grand Traverse Bay, Norwood to Grand Traverse Light MI
• Seul Choix Point MI to 5 nm West of the Mackinac Bridge
• Norwood MI to 5 nm West of the Mackinac Bridge
• Grand Traverse Light to Sleeping Bear Point MI
• Sleeping Bear Point to Manistee MI
• Lake Michigan 5 nm West of the Mackinac Bridge to Manistee, MI Northwestward beyond 5 nm off shore to mid-line of lake.
• Bay of Green Bay south of line from Cedar River to Rock Island Passage
• Bay of Green Bay south of line from Marinette WI to Fish Creek WI
• Rock Island Passage to Sturgeon Bay WI...excluding the Bay of Green Bay
• Sturgeon Bay WI to Two Rivers WI...excluding the Bay of Green Bay
• Two Rivers to Sheboygan WI
• Lake Michigan, Rock Island Passage to Sheboygan WI eastward beyond 5 nm
• Sheboygan to Port Washington WI
• Port Washington to North Point Light WI
• North Point Light to Wind Point WI
• Wind Point Light WI to Winthrop Harbor IL
• Lake Michigan, Sheboygan WI to Winthrop Harbor IL eastward beyond 5 nm
• Winthrop Harbor to Wilmette Harbor IL
• Wilmette Harbor to Meigs Field IL
• Meigs Field to Calumet Harbor IL
• Calumet Harbor IL to Gary IN
• Gary to Burns Harbor IN
• Burns Harbor to Michigan City IN
• Michigan City IN to New Buffalo MI
• Lake Michigan, Winthrop Harbor IL eastward to the mid-point of the Lake
• New Buffalo to Saint Joseph, MI
• Saint Joseph to South Haven, MI
• South Haven to Holland, MI
• Holland to Grand Haven, MI
• New Buffalo MI to South Haven MI
• Whitehall to Pentwater, MI
• Pentwater to Manistee, MI
• Lake Michigan, New Buffalo MI to Holland, MI 5 nm offshore to mid-line of lake
• Lake Michigan, Holland to Whitehall MI 5 nm offshore
• Lake Michigan, Whitehall to Manistee, MI 5 nm offshore to mid-line of lake

• St. Clair River
• Detroit River
• Lake St. Clair (U.S. Portion)

• Buffalo Harbor and the Upper Niagara River
• Ripley to Dunkirk NY
• Dunkirk to Buffalo NY
• Lake Erie, Ripley to Buffalo NY extending from 5 nm offshore
• Maumee Bay to Reno Beach OH
• Reno Beach to The Islands OH
• The Islands to Vermilion OH
• Vermilion to Avon Point OH
• Avon Point to Willowick OH
• Willowick to Geneva-on-the Lake OH
• Geneva-on-the-Lake to Conneaut OH
• Conneaut OH to Ripley NY
• Lake Erie, Detroit River Lt. to Maumee Bay OH to Reno Beach OH beyond 5 nm offshore
• Lake Erie, Reno Beach to The Islands OH beyond 5 nm off shoreline
• Lake Erie, The Islands to Vermilion OH beyond 5 nm off shoreline
• Lake Erie, Vermilion to Avon Point OH beyond 5 nm off shoreline
• Lake Erie, Avon Point to Willowick OH beyond 5 nm off shoreline
• Lake Erie, Willowick to Geneva-on-the-Lake OH beyond 5 nm off shoreline
• Lake Erie, Geneva-on-the-Lake to Conneaut OH beyond 5 nm off shoreline
• Lake Erie, Conneaut OH to Ripley NY beyond 5 nm off shoreline
• Michigan waters of Lake Erie from Detroit River to North Cape, MI

• Straights of Mackinac within 5nm of Mackinac Bridge including Mackinac Island
• St. Ignace to False Detour Channel
• 5 nm east of Mackinac Bridge to Presque Isle Light MI, including Bois Blanc Island
• Presque Isle Light to Sturgeon Point including Thunder Bay Marine Sancuary
• Sturgeon Point to Alabaster MI
• Lake Huron 5nm east of Mackinac Bridge to Presque Isle Lt MI eastward beyond 5 nm offshore to U.S.-Canadian border
• Lake Huron, Presque Isle Lt. to Alabaster MI eastward beyond 5 nm offshore
• Outer Saginaw Bay southwest of Alabaster to Port Austin MI to inner Saginaw Bay
• Inner Saginaw Bay southwest of point Au Gres to Bay Port, MI
• Port Austin to Harbor Beach MI
• Harbor Beach to Port Sanilac MI
• Port Sanilac to Port Huron, MI
• Lake Huron, Port Austin to Harbor Beach MI 5 nm off shore to US/Canadian border
• Lake Huron, Harbor Beach to Port Sanilac 5 nm to US/Canadian border
• Lake Huron, Port Sanilac to Port Huron MI 5 nm offshore to US/Canadian border

• Canadian portions of the Great Lakes
• Ice hazard bulletin for the Great Lakes

There are currently no warnings or advisories for this location.