299 FZUS63 KMQT 290155 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 955 PM EDT Thu Sep 28 2023 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...Tonight, Lake Superior is situated between a high of 30.3 inches over New England and Atlantic Canada and a 29.6 inch low over northern Manitoba. Friday, the high begins to drift offshore while the low lifts northeast to the Hudson Bay. Saturday, the high retrogrades back over the Lower Great Lakes at 30.2 inches. Sunday, the high builds to 30.3 inches over the Ontario/Quebec line while a 29.6 inch low develops over the Northern Plains. Monday, this low will lift northeast over northern Ontario while the high sags south over the Atlantic Seaboard. Tuesday, Lake Superior will be between highs over northern Manitoba and the Atlantic coast and lows over Quebec and the Great Plains. LSZ162-291000- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 955 PM EDT Thu Sep 28 2023 /855 PM CDT Thu Sep 28 2023/ .REST OF TONIGHT...Southeast winds 5 to 15 knots veering south after midnight. Waves calm to 2 feet. .FRIDAY...South winds 5 to 15 knots backing east late. A chance of showers and a slight chance of thunderstorms. Waves calm to 2 feet. .FRIDAY NIGHT...Northeast winds 5 to 15 knots veering east after midnight. Showers likely and a chance of thunderstorms. Waves calm to 2 feet. .SATURDAY...Northeast winds 5 to 15 knots. A slight chance of showers and thunderstorms. Waves calm to 2 feet. .SATURDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to 2 feet. .SUNDAY...East winds 10 to 20 knots. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .SUNDAY NIGHT...East winds 10 to 20 knots veering southwest after midnight. Waves building to 1 to 3 feet. .MONDAY...Southwest winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .TUESDAY...South winds 10 to 20 knots. A chance of showers. Waves building to 1 to 3 feet. $$ LSZ263-291000- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 955 PM EDT Thu Sep 28 2023 .REST OF TONIGHT...Southeast winds 5 to 15 knots veering south after midnight. Waves calm to 2 feet. .FRIDAY...South winds 5 to 15 knots backing southeast late. A chance of showers and a slight chance of thunderstorms by mid afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...South winds 5 to 15 knots. A chance of showers through midnight. A chance of thunderstorms. Showers likely after midnight. Waves calm to 2 feet. .SATURDAY...South winds 5 to 15 knots backing northeast by mid afternoon. A chance of showers and thunderstorms. Waves calm to 2 feet. .SATURDAY NIGHT...Northeast winds 5 to 15 knots veering east after midnight. Waves calm to 2 feet. .SUNDAY...East winds 10 to 20 knots. Waves calm to 2 feet. .SUNDAY NIGHT...South winds 10 to 20 knots veering southwest after midnight. Waves building to 1 to 3 feet. .MONDAY...Southwest winds 15 to 25 knots diminishing to 10 to 20 knots. Waves subsiding to calm to 2 feet. .TUESDAY...South winds 10 to 20 knots. A chance of showers. Waves building to 1 to 3 feet. $$ LSZ264-291000- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 955 PM EDT Thu Sep 28 2023 .REST OF TONIGHT...Southeast winds 5 to 15 knots veering south after midnight. Waves calm to 2 feet. .FRIDAY...South winds 5 to 15 knots backing southeast late. A chance of showers and a slight chance of thunderstorms by mid afternoon. Waves building to 1 to 3 feet. .FRIDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to 20 knots after midnight, then becoming southwest 5 to 15 knots late. A chance of showers and thunderstorms. Waves building to 2 to 4 feet, then subsiding to calm to 2 feet. .SATURDAY...South winds 5 to 15 knots backing northeast by mid afternoon. A chance of showers and thunderstorms. Waves subsiding to calm to 2 feet. .SATURDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to 2 feet. .SUNDAY...East winds 5 to 15 knots becoming southeast 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .SUNDAY NIGHT...Southeast winds 10 to 20 knots veering south after midnight. Waves building to 1 to 3 feet. .MONDAY...Southwest winds 10 to 20 knots. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .TUESDAY...South winds 5 to 15 knots increasing to 10 to 20 knots. A chance of showers. Waves building to 1 to 3 feet. $$ LSZ265-291000- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 955 PM EDT Thu Sep 28 2023 .REST OF TONIGHT...Southeast winds 5 to 15 knots veering south after midnight, then diminishing to less than 10 knots late. Waves calm to 2 feet. .FRIDAY...South winds 5 to 15 knots backing southeast in the afternoon. Waves building to 1 to 3 feet. .FRIDAY NIGHT...South winds 5 to 15 knots. A chance of showers. A slight chance of thunderstorms after midnight. Waves subsiding to calm to 2 feet. .SATURDAY...South winds 5 to 15 knots backing east by mid afternoon. A chance of showers and a slight chance of thunderstorms. Waves calm to 2 feet. .SATURDAY NIGHT...Northeast winds less than 10 knots. Waves calm to 2 feet. .SUNDAY...East winds 5 to 15 knots veering southeast by mid afternoon. Waves calm to 2 feet. .SUNDAY NIGHT...Southeast winds 5 to 15 knots becoming south 10 to 20 knots after midnight. Waves calm to 2 feet. .MONDAY...South winds 10 to 20 knots veering southwest. Waves calm to 2 feet. .TUESDAY...South winds 10 to 20 knots. Waves building to 1 to 3 feet. $$ LSZ266-291000- 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- 955 PM EDT Thu Sep 28 2023 .REST OF TONIGHT...Southeast winds 5 to 15 knots veering south after midnight. Waves calm to 2 feet. .FRIDAY...South winds 5 to 15 knots becoming southeast 10 to 20 knots late. A slight chance of showers by mid afternoon. Waves building to 2 to 4 feet. .FRIDAY NIGHT...South winds 15 to 25 knots diminishing to 5 to 15 knots. A chance of showers. A slight chance of thunderstorms after midnight. Waves subsiding to 1 to 3 feet. .SATURDAY...South winds 5 to 15 knots. A chance of showers and a slight chance of thunderstorms. Waves subsiding to calm to 2 feet. .SATURDAY NIGHT...Northeast winds less than 10 knots increasing to 5 to 15 knots after midnight. A chance of showers. Waves calm to 2 feet. .SUNDAY...East winds 5 to 15 knots. Waves calm to 2 feet. .SUNDAY NIGHT...South winds 10 to 20 knots. Waves building to 1 to 3 feet. .MONDAY...South winds 10 to 20 knots increasing to 15 to 25 knots. Waves subsiding to calm to 2 feet. .TUESDAY...South winds 10 to 20 knots. Waves building to 2 to 4 feet. $$ LSZ267-291000- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 955 PM EDT Thu Sep 28 2023 .REST OF TONIGHT...Southeast winds 5 to 15 knots veering south late. Waves calm to 2 feet. .FRIDAY...South winds 5 to 15 knots backing southeast in the afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...South winds 5 to 15 knots. A slight chance of showers after midnight. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .SATURDAY...South winds 5 to 15 knots. A chance of showers. A slight chance of thunderstorms by mid afternoon. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .SATURDAY NIGHT...South winds 5 to 15 knots backing east after midnight. A chance of showers. Waves calm to 2 feet. .SUNDAY...East winds 5 to 15 knots. Waves calm to 2 feet. .SUNDAY NIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots after midnight. Waves building to 1 to 3 feet. .MONDAY...South winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .TUESDAY...South winds 10 to 20 knots. Waves building to 2 to 4 feet. $$ LSZ261-291000- MAFOR 2903/ Superior West 14410 11400 11300 11310 11210. A chance of showers Friday afternoon and Friday evening. Waves 1 to 2 feet. Superior North Central 12420 13410 11310 11320 11430. A chance of showers Friday evening. Waves 1 to 4 feet. Superior South Central 11410 12400 11410 12310 11320 11420. Waves 1 to 4 feet. Superior East 11320 11310 12410 13310 11420. Waves 1 to 3 feet. $$ GS Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes