Great Lakes Forecast
Issued by NWS
Issued by NWS
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106 FZUS63 KMQT 282101 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 400 PM EST Fri Nov 28 2025 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... This evening, 30.4 inch ridging expands over the Mississippi River Valley while a 29.7 inch Colorado Low develops, moving over Oklahoma at 29.8 inches by early Saturday. This low will track northeast into the southern Great Lakes Basin by early Sunday morning at 29.8 inches, reaching the southern Ontario/Quebec border Sunday evening. In its wake, 30.6 inch high pressure moves over the Upper Midwest, sliding south of the Great Lakes at 30.5 inches Monday. The high is eroded Tuesday into Wednesday as a low pressure of 29.6 inches tracks through southern Ontario and a 29.5 inch Nor`Easter off the coast of the Chesapeake Bay. LSZ162-290900- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 400 PM EST Fri Nov 28 2025 /300 PM CST Fri Nov 28 2025/ .LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Waves calm to 2 feet. .TONIGHT...North winds 10 to 20 knots diminishing to 5 to 15 knots by midnight. A slight chance of snow showers after midnight. Waves calm to 2 feet. .SATURDAY...Northeast winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. A chance of snow showers. Waves building to 1 to 3 feet. .SATURDAY NIGHT...Northeast winds 15 to 25 knots backing north by midnight. Snow showers likely in the evening, then a chance of snow showers after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .SUNDAY...Northwest winds 15 to 25 knots. A slight chance of snow showers. Waves subsiding to 2 to 4 feet. .SUNDAY NIGHT...Northwest winds 10 to 20 knots backing west after midnight. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .MONDAY...West winds 20 to 30 knots. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .MONDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Waves subsiding to calm to 2 feet. .TUESDAY...Southwest winds 10 to 20 knots. A chance of snow showers. Waves building to 1 to 3 feet. .WEDNESDAY...Northwest winds 15 to 25 knots. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. $$ LSZ263-290900- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 400 PM EST Fri Nov 28 2025 .LATE THIS AFTERNOON...Northwest winds 5 to 15 knots. Waves 1 to 3 feet. .TONIGHT...North winds 5 to 15 knots. A chance of snow showers. Waves subsiding to calm to 2 feet. .SATURDAY...North winds 5 to 15 knots veering northeast by late morning, then increasing to 10 to 20 knots by mid afternoon. A chance of snow showers. Waves building to 1 to 3 feet. .SATURDAY NIGHT...Northeast winds 15 to 25 knots backing north by midnight. Snow showers likely in the evening, then a chance of snow showers after midnight. Waves building to 3 to 6 feet occasionally to 8 feet. .SUNDAY...Northwest winds 20 to 30 knots. A chance of snow showers. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .SUNDAY NIGHT...Northwest winds 20 to 30 knots becoming west 15 to 25 knots after midnight. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet. .MONDAY...West gales to 35 knots. Waves building to 6 to 10 feet occasionally to 13 feet. .MONDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. A chance of snow showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .TUESDAY...Southwest winds 10 to 20 knots increasing to 15 to 25 knots. A chance of snow showers. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet. .WEDNESDAY...Northwest winds 20 to 30 knots. A chance of snow showers. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. $$ LSZ264-290900- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 400 PM EST Fri Nov 28 2025 .LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Waves 3 to 5 feet occasionally to 7 feet. .TONIGHT...North winds 10 to 20 knots becoming northwest 5 to 15 knots by midnight. Waves subsiding to calm to 2 feet. .SATURDAY...Northwest winds 5 to 15 knots veering northeast by mid afternoon. A chance of snow showers. Waves calm to 2 feet. .SATURDAY NIGHT...Northeast winds 10 to 20 knots backing north by midnight, then increasing to 15 to 25 knots late. A chance of snow showers. Waves building to 3 to 5 feet occasionally to 7 feet. .SUNDAY...North winds 20 to 30 knots backing northwest in the afternoon. A chance of snow showers. Waves building to 5 to 9 feet occasionally to 11 feet. .SUNDAY NIGHT...Northwest winds 20 to 30 knots becoming west 15 to 25 knots after midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .MONDAY...West gales to 35 knots. A chance of snow showers. Waves building to 6 to 10 feet occasionally to 13 feet. .MONDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. A chance of snow showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .TUESDAY...West winds 10 to 20 knots becoming southwest 15 to 25 knots. A chance of snow showers. Waves subsiding to 2 to 4 feet, then building to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY...Northwest gales to 35 knots. A chance of snow showers. Freezing spray. Waves building to 6 to 9 feet occasionally to 11 feet, then subsiding to 4 to 7 feet occasionally to 9 feet. $$ LSZ265-290900- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 400 PM EST Fri Nov 28 2025 .LATE THIS AFTERNOON...Northwest winds 15 to 25 knots. A slight chance of snow showers. Waves 3 to 6 feet occasionally to 8 feet. .TONIGHT...Northwest winds 10 to 20 knots backing west late. A slight chance of snow showers. Waves subsiding to calm to 2 feet. .SATURDAY...West winds 5 to 15 knots backing east by mid afternoon. A chance of snow showers. Waves calm to 2 feet. .SATURDAY NIGHT...Northeast winds 10 to 20 knots increasing to 15 to 25 knots by midnight, then becoming north 20 to 30 knots late. Snow showers. Waves building to 3 to 6 feet occasionally to 8 feet. .SUNDAY...North gales to 35 knots becoming northwest gales to 40 knots in the afternoon. Snow showers. Waves building to 6 to 10 feet occasionally to 13 feet. .SUNDAY NIGHT...Northwest gales to 35 knots becoming west 15 to 25 knots after midnight. A chance of snow showers. Waves subsiding to 2 to 4 feet. .MONDAY...Southwest winds 20 to 30 knots. A chance of snow showers. Waves 2 to 4 feet. .MONDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. A chance of snow showers. Waves 2 to 4 feet. .TUESDAY...West winds 15 to 25 knots backing southwest. A chance of snow showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .WEDNESDAY...Northwest gales to 35 knots. Snow showers likely, then a chance of snow showers. Freezing spray. Waves building to 5 to 8 feet occasionally to 10 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. $$ LSZ266-290900- 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- 400 PM EST Fri Nov 28 2025 .LATE THIS AFTERNOON...Northwest winds 20 to 30 knots. A chance of snow showers. Waves 5 to 9 feet occasionally to 11 feet. .TONIGHT...Northwest winds 15 to 25 knots diminishing to 5 to 15 knots. A chance of snow showers. Waves subsiding to 1 to 3 feet. .SATURDAY...Northwest winds 5 to 15 knots veering northeast by mid afternoon. A chance of snow showers. Waves subsiding to calm to 2 feet. .SATURDAY NIGHT...East winds 10 to 20 knots becoming north 20 to 30 knots late. Snow showers. Waves building to 3 to 6 feet occasionally to 8 feet. .SUNDAY...North gales to 35 knots becoming northwest gales to 40 knots in the afternoon. Snow showers. Waves building to 10 to 14 feet occasionally to 18 feet. .SUNDAY NIGHT...Northwest gales to 35 knots diminishing to 15 to 25 knots after midnight. Snow showers in the evening, then a chance of snow showers after midnight. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .MONDAY...West winds 15 to 25 knots becoming southwest 20 to 30 knots in the afternoon. A chance of snow showers. Waves building to 6 to 9 feet occasionally to 11 feet. .MONDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. A chance of snow showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .TUESDAY...West winds 15 to 25 knots backing southwest. A chance of snow showers. Waves subsiding to 2 to 4 feet, then building to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY...Northwest gales to 35 knots. Snow showers. Freezing spray. Waves building to 9 to 12 feet occasionally to 15 feet, then subsiding to 7 to 10 feet occasionally to 13 feet. $$ LSZ267-290900- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 400 PM EST Fri Nov 28 2025 .LATE THIS AFTERNOON...North winds 20 to 30 knots. A chance of snow showers. Waves 5 to 9 feet occasionally to 11 feet. .TONIGHT...North winds 20 to 30 knots diminishing to 5 to 15 knots. A chance of snow showers. Waves subsiding to 1 to 3 feet. .SATURDAY...Northeast winds 5 to 15 knots veering south. A chance of snow showers in the morning, then snow showers in the afternoon. Waves subsiding to calm to 2 feet. .SATURDAY NIGHT...Southeast winds 10 to 20 knots becoming east 15 to 25 knots by midnight, then diminishing to 10 to 20 knots late. Snow showers. Waves building to 1 to 3 feet. .SUNDAY...North winds 20 to 30 knots becoming northwest gales to 35 knots in the afternoon. Snow showers. Waves building to 9 to 12 feet occasionally to 15 feet. .SUNDAY NIGHT...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. Snow showers. Waves subsiding to 4 to 7 feet occasionally to 9 feet. .MONDAY...West winds 15 to 25 knots becoming southwest 20 to 30 knots in the afternoon. Snow showers likely in the morning, then a chance of snow showers in the afternoon. Waves subsiding to 3 to 6 feet occasionally to 8 feet, then building to 4 to 7 feet occasionally to 9 feet. .MONDAY NIGHT...Southwest winds 20 to 30 knots veering west after midnight. Snow showers likely. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .TUESDAY...West winds 15 to 25 knots backing southwest. Snow showers likely. Waves subsiding to 2 to 4 feet, then building to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY...West winds 20 to 30 knots veering northwest. Snow showers. Freezing spray. Waves building to 7 to 11 feet occasionally to 14 feet. $$ LSZ261-290300- MAFOR 2822/ Superior West 11710 11810 12800 11100 12110 11120. A chance of snow showers Saturday. Waves 2 feet or less tonight. Waves 1 to 3 feet Saturday. Superior North Central 11720 11820 12710 12700 11800 11110. Waves 3 to 5 feet subsiding to 1 to 2 feet tonight. Waves 1 to 2 feet Saturday. Superior South Central 11730 12720 12710 11700 11600 11100. A chance of snow showers. Waves 4 to 7 feet subsiding to 1 to 3 feet tonight. Waves 1 to 3 feet subsiding to 1 foot or less Saturday. Superior East 11840 11830 11820 11810 11800 11100 11510 11310. A chance of snow showers. Waves 5 to 8 feet subsiding to 2 to 4 feet tonight. Waves 1 to 3 feet Saturday. $$ 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