Great Lakes 

Open Lake Forecasts  Lake Superior  Wisconsin Shore Line
Michigan Shore Line  Lake Michigan  Lake Huron  Lake Erie 
Lake Ontario

Official NOAA weather warnings, 
  observations, and forecasts.

ALL LAKES FORECASTS

• Water Levels weekly

OPEN LAKE ZONE FORECASTS

Explanation of the MAFOR code

• Lake Superior (U.S. portion) 
• Lake Superior MAFOR
• Lake Michigan open water
• Lake Michigan MAFOR
• Lake Huron (U.S. portion)
• Lake Huron MAFOR
• Lake St. Clair (U.S. portion)
• Lake Erie (U.S. portion) 
• Lake Erie MAFOR 
• Lake Ontario (U.S. portion)
• Lake Ontario MAFOR

COASTAL MARINE ZONE FORECASTS

[ NWS marine ZONE forecast areas - within 5 nautical miles of shore ]

LAKE SUPERIOR, BAYS AND RIVERS

• Minnesota Shore Line
  • Grand Portage to Grand Marais, MN  
  • Grand Marais to Taconite Harbor, MN
  • Taconite Harbor to Silver Bay Harbor, MN  
  • Silver Bay Harbor to Two Harbors, MN
  • Two Harbors to Duluth, MN
• Wisconsin Shore Line
  • Duluth, MN to Port Wing, WI  
  • Port Wing to Sand Island, WI  
  • Sand Island to Bayfield, WI
  • Chequamegon Bay-Bayfield to Oak Point, WI  
  • Oak Point to Saxon Harbor, WI
• Michigan Shore Line
  • Saxon Harbor, WI to Ontonagon, MI  
  • Ontonagon to Upper Entrance of Portage Canal, MI  
  • Upper Entrance of Portage Canal to Manitou Island, MI  
  • Manitou Island to Lower Entrance Light to Portage Lake, MI
  • Keweenaw Bay and Huron Bay from Lower Entrance Light to Portage Lake to Huron Island, MI 
  • Huron Islands to Marquette, MI  
  • Marquette to Grand Marais, MI  
  • Grand Marais to Whitefish Point, MI  
  • Whitefish Bay (U.S. portion), Whitefish Point to Point Iroquois, MI 
  • St. Marys River, Point Iroquois to Eastern Potagannissing Bay 

• Michigan Shore Line
  • Bay of Green Bay, MI (north of line from Cedar River, MI to Rock Island Passage) 
  • Seul Choix Pt. to Point Detour, MI  
  • Mackinac Bridge to Seul Choix Point, MI  
  • Mackinac Bridge to Norwood, MI
  • Grand Traverse Light to Sleeping Bear Point, MI  
  • Sleeping Bear Point to Manistee, MI  
  • Muskegon to Manistee, MI
  • South Haven to Muskegon, MI  
  • New Buffalo, MI to South Haven, MI  
  • Michigan City, IN to New Buffalo, MI  
  • Grand Traverse Bay Norwood to Grand Traverse Light, MI
• Wisconsin Shore Line
  • Rock Island Passage Sturgeon Bay, WI  
  • Sturgeon Bay, WI to Two Rivers, WI
  • Two Rivers to Sheboygan, WI  
  • Sheboygan to Port Washington, WI  
  • Port Washington to North Point Light, WI  
  • North Point Light to Wind Point, WI  
  • Bay of Green Bay, WI (south of line from Cedar River to Rock Island Passage & north of a line from Marinette, WI to Fish Creek, WI)
  • Bay of Green Bay, WI (south of a line from Marinette, WI to Fish Creek, WI)
  • Wind Point Light to Winthrop Harbor, IL
• Illinois Shore Line
  • Winthrop Harbor to Wilmette Harbor, IL
  • Wilmette Harbor to Meigs Field, IL
  • Meigs Field to Calumet Harbor, IL  
• Indiana Shore Line
  • Calumet Harbor to Gary Harbor, IN  
  • Gary to Burns Harbor, IN  
  • Burns Harbor to Michigan City, IN  

• Michigan Shore Line
  • Mackinac Bridge to False Detour Channel, MI  
  • Mackinac Bridge to Presque Island Light, MI  
  • Presque Isle Light to Alabaster, MI  
  • Port Austin to White Rock, MI
  • White Rock to Lakeport, MI  
  • Lakeport to Port Huron, MI  
  • Saginaw Bay, Alabaster to Point Huron, MI  
  • St. Claire River, Port Huron to Upper Entrance Lake St. Clair
  • Lake St. Clair, MI (U.S. Portion)

• Michigan Shore Line
  • Detroit River, Lower Entrance to Lake St. Clair to Detroit River Light  
  • Detroit River to North Cape, MI  
• Ohio Shore Line
  • 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  
• Pennsylvania Shore Line
  • Conneaut, OH to Ripley, NY
• New York Shore Line
  • Ripley to Dunkirk, NY  
  • Dunkirk to Bullalo, NY  
  • Buffalo Harbor and the Upper Niagara River, NY  

• New York Shore Line
  • Niagara River to Thirty-Mile Point, NY  
  • Thirty-Mile Point to Sodus Bay, NY  
  • Sodus Bay to Mexico Bay, NY
  • Mexico Bay, NY to the St. Lawrence River  
  • St. Lawrence River above Ogdensburg, NY  
  • St. Lawrence River from Ogdensburg to St. Regis, NY

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