![National Oceanic and Atmospheric Administration](/build/images/header/noaa.d87e0251.png)
![National Weather Service](/build/images/header/nws.4e6585d8.png)
![United States Department of Commerce](/build/images/header/doc.b38ba91a.png)
Great Lakes Forecast
Issued by NWS
Issued by NWS
996 FZUS63 KMQT 170733 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 333 AM EDT Sat Aug 17 2024 For waters beyond 5 nautical miles of shore on Lake Superior. Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS...A 29.7 inch low will slide into Lower Michigan this morning and over the Lower Great Lakes Sunday morning. In it`s wake, weak ridging of 30.0 inches will move back over Lake Superior Sunday, building to near 30.2 inches Monday. The 30.2 inch ridge remains until Tuesday. Ridging over the Great Lakes weakens to 30.1 inches through Thursday as the high pressure tracks toward New England. LSZ162-171545- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 333 AM EDT Sat Aug 17 2024 /233 AM CDT Sat Aug 17 2024/ .EARLY THIS MORNING...North winds 10 to 20 knots. A slight chance of showers and thunderstorms. Waves 1 to 3 feet. .TODAY...North winds 10 to 20 knots diminishing to 5 to 15 knots in the afternoon, then backing west late. A slight chance of showers. A slight chance of thunderstorms by mid afternoon. Waves subsiding to calm to 2 feet. .TONIGHT...Northwest winds 5 to 15 knots veering north after midnight. Waves calm to 2 feet. .SUNDAY...North winds 5 to 15 knots veering east in the afternoon, then veering southwest late. Waves calm to 2 feet. .SUNDAY NIGHT...West winds 5 to 15 knots veering north after midnight. Waves calm to 2 feet. .MONDAY...Northeast winds 5 to 15 knots veering east by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2 feet. .TUESDAY...East winds 5 to 15 knots. Waves calm to 2 feet. .WEDNESDAY...Southeast winds 10 to 20 knots veering south. Waves calm to 2 feet. $$ LSZ263-171545- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 333 AM EDT Sat Aug 17 2024 .EARLY THIS MORNING...North winds 5 to 15 knots. Patchy fog. A slight chance of showers and thunderstorms. Waves 1 to 3 feet. .TODAY...North winds 10 to 20 knots diminishing to 5 to 15 knots late. A slight chance of showers through early afternoon. Waves subsiding to calm to 2 feet. .TONIGHT...North winds 5 to 15 knots. Waves calm to 2 feet. .SUNDAY...North winds 10 to 20 knots veering northeast in the afternoon, then diminishing to 5 to 15 knots late. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .SUNDAY NIGHT...Northwest winds 5 to 15 knots veering north after midnight. Waves calm to 2 feet. .MONDAY...Northeast winds 5 to 15 knots veering east by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...East winds 5 to 15 knots becoming southeast less than 10 knots after midnight. Waves calm to 2 feet. .TUESDAY...Southeast winds 5 to 15 knots veering south. Waves calm to 2 feet. .WEDNESDAY...South winds 5 to 15 knots. Waves calm to 2 feet. $$ LSZ264-171545- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 333 AM EDT Sat Aug 17 2024 .EARLY THIS MORNING...North winds 5 to 15 knots. Patchy fog. A slight chance of showers and thunderstorms. Waves 1 to 3 feet. .TODAY...North winds 10 to 20 knots. A slight chance of showers through early afternoon. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .TONIGHT...North winds 5 to 15 knots increasing to 10 to 20 knots late. Waves subsiding to calm to 2 feet, then building to 2 to 4 feet. .SUNDAY...North winds 10 to 20 knots becoming northwest 5 to 15 knots late. Waves subsiding to calm to 2 feet. .SUNDAY NIGHT...Northwest winds 5 to 15 knots veering northeast after midnight. Waves calm to 2 feet. .MONDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet. .MONDAY NIGHT...North winds less than 10 knots veering east after midnight. Waves calm to 2 feet. .TUESDAY...Southeast winds 5 to 15 knots veering south. Waves calm to 2 feet. .WEDNESDAY...South winds 5 to 15 knots. Waves calm to 2 feet. $$ LSZ265-171545- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 333 AM EDT Sat Aug 17 2024 .EARLY THIS MORNING...North winds 10 to 20 knots. Patchy fog. A chance of showers and a slight chance of thunderstorms. Waves calm to 2 feet. .TODAY...North winds 10 to 20 knots. Patchy fog through early afternoon. A slight chance of thunderstorms through early afternoon. A chance of showers. Waves building to 1 to 3 feet. .TONIGHT...North winds 10 to 20 knots increasing to 15 to 25 knots late. A slight chance of showers through midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .SUNDAY...North winds 15 to 25 knots diminishing to 10 to 20 knots late. Waves subsiding to 2 to 4 feet. .SUNDAY NIGHT...North winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .MONDAY...Northeast winds 10 to 20 knots backing north by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...North winds 5 to 15 knots veering east after midnight. Waves calm to 2 feet. .TUESDAY...East winds 5 to 15 knots veering south. Waves calm to 2 feet. .WEDNESDAY...Southeast winds 5 to 15 knots becoming south 10 to 20 knots. Waves calm to 2 feet. $$ LSZ266-171545- Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore- 333 AM EDT Sat Aug 17 2024 .EARLY THIS MORNING...Northeast winds 10 to 20 knots. Patchy fog. A chance of showers and a slight chance of thunderstorms. Waves calm to 2 feet. .TODAY...Northeast winds 10 to 20 knots backing north in the afternoon. Patchy fog through early afternoon. A slight chance of thunderstorms through early afternoon. A slight chance of showers. Waves building to 1 to 3 feet. .TONIGHT...North winds 10 to 20 knots increasing to 15 to 25 knots after midnight. A slight chance of thunderstorms through midnight. A chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet. .SUNDAY...North winds 15 to 25 knots diminishing to 10 to 20 knots in the afternoon. Waves subsiding to 2 to 4 feet. .SUNDAY NIGHT...North winds 10 to 20 knots. Waves subsiding to 1 to 3 feet. .MONDAY...North winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .MONDAY NIGHT...North winds 5 to 15 knots veering east after midnight. Waves calm to 2 feet. .TUESDAY...East winds 5 to 15 knots veering south. Waves calm to 2 feet. .WEDNESDAY...South winds 5 to 15 knots increasing to 10 to 20 knots. Waves calm to 2 feet. $$ LSZ267-171545- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 333 AM EDT Sat Aug 17 2024 .EARLY THIS MORNING...East winds 10 to 20 knots. Patchy fog. A chance of showers and a slight chance of thunderstorms. Waves calm to 2 feet. .TODAY...Northeast winds 10 to 20 knots backing north in the afternoon. A slight chance of showers. A slight chance of thunderstorms by mid afternoon. Waves calm to 2 feet. .TONIGHT...North winds 10 to 20 knots increasing to 15 to 25 knots late. A chance of showers and a slight chance of thunderstorms. Waves building to 2 to 4 feet. .SUNDAY...North winds 15 to 25 knots. A slight chance of showers through early afternoon. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .SUNDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet. .MONDAY...North winds 10 to 20 knots backing northwest by mid afternoon. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .MONDAY NIGHT...North winds 10 to 20 knots veering northeast after midnight. Waves subsiding to calm to 2 feet. .TUESDAY...North winds 10 to 20 knots becoming south 5 to 15 knots. Waves calm to 2 feet. .WEDNESDAY...Southeast winds 10 to 20 knots veering south. Waves calm to 2 feet. $$ LSZ261-171545- MAFOR 1709/ Superior West 11820 13810 13710 11810. Waves 1 to 3 feet. Superior North Central 11110 11810 14820 11810 11820. Waves 1 to 3 feet. Superior South Central 11110 13810 14820. A chance of showers and thunderstorms early, then a chance of showers this morning. A chance of showers this evening. Waves 1 to 3 feet today. Waves 2 to 4 feet tonight. Superior East 11200 11100 11800 13810 12820. A chance of showers today and this evening. Waves 1 to 3 feet. $$ WFO MQT Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes