Great Lakes

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) (LSZ260)
  • Lake Superior MAFOR (LSZ261)
  • Lake Michigan open water (LMZ760)
  • Lake Michigan MAFOR (LMZ761)
  • Lake Huron (U.S. portion) (LHZ460)
  • Lake Huron MAFOR (LHZ461)
  • Lake St. Clair (U.S. portion) (LCZ460)
  • Lake Erie (U.S. portion) (LEZ160)
  • Lake Erie MAFOR (LEZ161)
  • Lake Ontario (U.S. portion) (LOZ060)
  • Lake Ontario MAFOR (LOZ061)
    
    

• 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 (LSZ140)
      • Grand Marais to Taconite Harbor, MN (LSZ141)
      • Taconite Harbor to Silver Bay Harbor, MN (LSZ142)
      • Silver Bay Harbor to Two Harbors, MN (LSZ143)
      • Two Harbors to Duluth, MN (LSZ144)
    • Wisconsin Shore Line
      • Duluth, MN to Port Wing, WI (LSZ145)
      • Port Wing to Sand Island, WI (LSZ146)
      • Sand Island to Bayfield, WI (LSZ147)
      • Chequamegon Bay-Bayfield to Oak Point, WI (LSZ121)
      • Oak Point to Saxon Harbor, WI (LSZ148)
    • Michigan Shore Line
      • Saxon Harbor, WI to Ontonagon, MI (LSZ241)
      • Ontonagon to Upper Entrance of Portage Canal, MI (LSZ242)
      • Upper Entrance of Portage Canal to Manitou Island, MI (LSZ243)
      • Manitou Island to Lower Entrance Light to Portage Lake, MI (LSZ244)
      • Keweenaw Bay and Huron Bay from Lower Entrance Light to Portage Lake to Huron Island, MI (LSZ221)
      • Huron Islands to Marquette, MI (LSZ245)
      • Marquette to Grand Marais, MI (LSZ246)
      • Grand Marais to Whitefish Point, MI (LSZ247)
      • Whitefish Bay (U.S. portion), Whitefish Point to Point Iroquois, MI (LSZ321)
      • St. Marys River, Point Iroquois to Eastern Potagannissing Bay (LSZ232)
    
    
  • LAKE MICHIGAN AND BAYS 
    • Michigan Shore Line
      • Bay of Green Bay, MI (north of line from Cedar River, MI to Rock Island Passage) (LMZ221)
      • Seul Choix Pt. to Point Detour, MI (LMZ248)
      • Mackinac Bridge to Seul Choix Point, MI (LMZ341)
      • Mackinac Bridge to Norwood, MI (LMZ342)
      • Grand Traverse Light to Sleeping Bear Point, MI (LMZ344)
      • Sleeping Bear Point to Manistee, MI (LMZ345)
      • Muskegon to Manistee, MI (LMZ849)
      • South Haven to Muskegon, MI (LMZ848)
      • New Buffalo, MI to South Haven, MI (LMZ847)
      • Michigan City, IN to New Buffalo, MI (LMZ746)
      • Grand Traverse Bay Norwood to Grand Traverse Light, MI (LMZ323)
    • Wisconsin Shore Line
      • Rock Island Passage Sturgeon Bay, WI (LMZ541)
      • Sturgeon Bay, WI to Two Rivers, WI (LMZ542)
      • Two Rivers to Sheboygan, WI (LMZ543)
      • Sheboygan to Port Washington, WI (LMZ643)
      • Port Washington to North Point Light, WI (LMZ644)
      • North Point Light to Wind Point, WI (LMZ645)
      • 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) (LMZ521)
      • Bay of Green Bay, WI (south of a line from Marinette, WI to Fish Creek, WI) (LMZ522)
      • Wind Point Light to Winthrop Harbor, IL (LMZ646)
    • Illinois Shore Line
      • Winthrop Harbor to Wilmette Harbor, IL (LMZ740)
      • Wilmette Harbor to Meigs Field, IL (LMZ741)
      • Meigs Field to Calumet Harbor, IL (LMZ742)
    • Indiana Shore Line
      • Calumet Harbor to Gary Harbor, IN (LMZ743)
      • Gary to Burns Harbor, IN (LMZ744)
      • Burns Harbor to Michigan City, IN (LMZ745)
    
    
  • LAKE HURON, BAYS AND LAKES 
    • Michigan Shore Line
      • Mackinac Bridge to False Detour Channel, MI (LHZ346)
      • Mackinac Bridge to Presque Island Light, MI (LHZ347)
      • Presque Isle Light to Alabaster, MI (LHZ348)
      • Port Austin to White Rock, MI (LHZ441)
      • White Rock to Lakeport, MI (LHZ442)
      • Lakeport to Port Huron, MI (LHZ443)
      • Saginaw Bay, Alabaster to Point Huron, MI (LHZ421)
      • St. Claire River, Port Huron to Upper Entrance Lake St. Clair (LCZ422)
      • Lake St. Clair, MI (U.S. Portion) (LCZ460)
    
    
  • LAKE ERIE AND BAYS 
    • Michigan Shore Line
      • Detroit River, Lower Entrance to Lake St. Clair to Detroit River Light (LCZ423)
      • Detroit River to North Cape, MI (LEZ444)
    • Ohio Shore Line
      • Maumee Bay to Reno Beach, OH (LEZ142)
      • Reno Beach to The Islands, OH (LEZ143)
      • The Islands to Vermilion, OH (LEZ144)
      • Vermilion to Avon Point, OH (LEZ145)
      • Avon Point to Willowick, OH (LEZ146)
      • Willowick to Geneva-on-the-Lake, OH (LEZ147)
      • Geneva-on-the-Lake to Conneaut, OH (LEZ148)
    • Pennsylvania Shore Line
      • Conneaut, OH to Ripley, NY (LEZ149)
    • New York Shore Line
      • Ripley to Dunkirk, NY (LEZ040)
      • Dunkirk to Bullalo, NY (LEZ041)
      • Buffalo Harbor and the Upper Niagara River, NY (LEZ020)
    
    
  • LAKE ONTARIO AND RIVERS 
    • New York Shore Line
      • Niagara River to Thirty-Mile Point, NY (LOZ042)
      • Thirty-Mile Point to Sodus Bay, NY (LOZ043)
      • Sodus Bay to Mexico Bay, NY (LOZ044)
      • Mexico Bay, NY to the St. Lawrence River (LOZ045)
      • St. Lawrence River above Ogdensburg, NY (SLZ022)
      • St. Lawrence River from Ogdensburg to St. Regis, NY (SLZ024)