Great Lakes Forecast
Issued by NWS
Issued by NWS
694 FZUS63 KMQT 022101 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 400 PM EST Tue Dec 2 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... A 29.7 inch trough is swinging eastward towards the lake this afternoon, extending south from a 29.5 inch low over Hudson Bay. The trough exits eastward Wednesday morning. In its wake, a 30.5 inch high builds over the Dakotas Wednesday evening. As this high shifts into the Lower Midwest Thursday, it will pass a 30.2 inch ridge over the lake. Meanwhile, a 29.7 inch low will move over Lake Winnipeg before passing north of the lake overnight into Friday at 29.6 inches. Friday night, another 29.7 inch trough will pass over the lake. Over the weekend, Lake Superior will be between a 30.3 inch high over Saskatchewan and a low of 29.6 inches over Quebec, with the high approaching Lake Superior late in the weekend to early next week. LSZ162-030900- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 400 PM EST Tue Dec 2 2025 /300 PM CST Tue Dec 2 2025/ .LATE THIS AFTERNOON...Southwest winds 15 to 25 knots. A slight chance of snow showers. Waves 4 to 7 feet occasionally to 9 feet. .TONIGHT...Southwest winds 15 to 25 knots veering northwest late. 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. Freezing spray in the afternoon. Waves building to 5 to 8 feet occasionally to 10 feet. .WEDNESDAY NIGHT...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots late. Heavy freezing spray in the evening. A slight chance of snow showers. Waves subsiding to 2 to 4 feet. .THURSDAY...West winds 15 to 25 knots becoming southwest gales to 35 knots in the afternoon. Freezing spray in the afternoon. A chance of snow showers in the afternoon. Waves subsiding to 1 to 3 feet, then building to 4 to 7 feet occasionally to 9 feet. .THURSDAY NIGHT...Southwest gales to 40 knots becoming west gales to 35 knots after midnight. Freezing spray. Snow showers in the evening. A chance of snow showers after midnight. Waves building to 5 to 8 feet occasionally to 10 feet, then subsiding to 3 to 5 feet occasionally to 7 feet. .FRIDAY...West winds 10 to 20 knots. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .FRIDAY NIGHT...West winds 15 to 25 knots becoming northwest 10 to 20 knots after midnight. Waves 1 to 3 feet. .SATURDAY...Northwest winds 10 to 20 knots veering north. Waves subsiding to calm to 2 feet. .SUNDAY...Northwest winds 10 to 20 knots diminishing to 5 to 15 knots. Waves calm to 2 feet. Note, wave height forecasts are for ice free areas. $$ LSZ263-030900- 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 Tue Dec 2 2025 ...GALE WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH LATE WEDNESDAY NIGHT... .LATE THIS AFTERNOON...Southwest winds 20 to 30 knots. A slight chance of snow showers. Waves 4 to 8 feet occasionally to 10 feet. .TONIGHT...Southwest winds 15 to 25 knots veering west by midnight, then becoming northwest 20 to 30 knots late. Snow showers likely. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY...Northwest winds 20 to 30 knots increasing to gales to 35 knots by mid afternoon. Freezing spray. A slight chance of snow showers. Waves building to 4 to 8 feet occasionally to 10 feet. .WEDNESDAY NIGHT...Northwest gales to 35 knots diminishing to 20 to 30 knots late. Freezing spray. A chance of snow showers. Waves building to 7 to 10 feet occasionally to 13 feet, then subsiding to 4 to 7 feet occasionally to 9 feet. .THURSDAY...West winds 15 to 25 knots becoming southwest gales to 40 knots in the afternoon. A chance of snow showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet, then building to 4 to 7 feet occasionally to 9 feet. .THURSDAY NIGHT...Southwest gales to 40 knots veering west after midnight. Freezing spray. Snow showers likely in the evening. A chance of snow showers after midnight. Waves building to 6 to 9 feet occasionally to 11 feet, then subsiding to 4 to 7 feet occasionally to 9 feet. .FRIDAY...Northwest winds 20 to 30 knots becoming west 10 to 20 knots in the afternoon. Waves subsiding to 2 to 4 feet. .FRIDAY NIGHT...West winds 15 to 25 knots veering northwest after midnight. A chance of snow showers. Waves 2 to 4 feet. .SATURDAY...Northwest winds 15 to 25 knots diminishing to 10 to 20 knots. Waves subsiding to 1 to 3 feet. .SUNDAY...Northwest winds 10 to 20 knots diminishing to 5 to 15 knots. Waves subsiding to calm to 2 feet. Note, wave height forecasts are for ice free areas. $$ LSZ264-030900- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 400 PM EST Tue Dec 2 2025 ...GALE WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY MORNING... .LATE THIS AFTERNOON...Southwest winds 20 to 30 knots. A slight chance of snow showers. Waves 4 to 8 feet occasionally to 10 feet. .TONIGHT...Southwest winds 15 to 25 knots veering west by midnight, then becoming northwest 20 to 30 knots late. A chance of snow showers in the evening, then snow showers likely after midnight. Waves subsiding to 4 to 7 feet occasionally to 9 feet. .WEDNESDAY...North gales to 35 knots backing northwest. Freezing spray. A chance of snow showers. Waves building to 7 to 10 feet occasionally to 13 feet, then subsiding to 5 to 8 feet occasionally to 10 feet. .WEDNESDAY NIGHT...Northwest gales to 35 knots. Heavy freezing spray. A chance of snow showers. Waves building to 9 to 12 feet occasionally to 15 feet, then subsiding to 7 to 10 feet occasionally to 13 feet. .THURSDAY...Northwest winds 20 to 30 knots becoming southwest gales to 35 knots in the afternoon. Freezing spray in the morning. A chance of snow showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet, then building to 4 to 7 feet occasionally to 9 feet. .THURSDAY NIGHT...Southwest gales to 40 knots veering west after midnight. Freezing spray. Snow showers in the evening. A chance of snow showers after midnight. Waves building to 7 to 10 feet occasionally to 13 feet, then subsiding to 5 to 8 feet occasionally to 10 feet. .FRIDAY...Northwest winds 20 to 30 knots becoming west 10 to 20 knots in the afternoon. Waves subsiding to 2 to 4 feet. .FRIDAY NIGHT...West winds 10 to 20 knots becoming northwest 15 to 25 knots after midnight. A chance of snow showers. Waves building to 3 to 6 feet occasionally to 8 feet. .SATURDAY...Northwest winds 15 to 25 knots. Waves subsiding to 2 to 4 feet. .SUNDAY...Northwest winds 10 to 20 knots. Waves subsiding to calm to 2 feet. Note, wave height forecasts are for ice free areas. $$ LSZ265-030900- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 400 PM EST Tue Dec 2 2025 ...GALE WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY MORNING... .LATE THIS AFTERNOON...Southwest winds 15 to 25 knots. Waves 1 to 3 feet building to 2 to 4 feet. .TONIGHT...Southwest winds 20 to 30 knots veering west by midnight. A chance of snow showers in the evening, then snow showers after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .WEDNESDAY...Northwest gales to 40 knots. Snow showers likely. Freezing spray in the afternoon. Waves building to 5 to 9 feet occasionally to 11 feet. .WEDNESDAY NIGHT...Northwest gales to 45 knots. Freezing spray. Snow showers in the evening. A chance of snow showers after midnight. Waves building to 8 to 11 feet occasionally to 14 feet, then subsiding to 6 to 9 feet occasionally to 11 feet. .THURSDAY...Northwest winds 20 to 30 knots backing southwest in the afternoon. Freezing spray in the morning. A chance of snow showers. Waves subsiding to 2 to 4 feet. .THURSDAY NIGHT...Southwest gales to 40 knots becoming west gales to 35 knots after midnight. Snow showers. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...West winds 20 to 30 knots diminishing to 15 to 25 knots in the afternoon. A chance of snow showers. Waves subsiding to 1 to 3 feet. .FRIDAY NIGHT...West winds 15 to 25 knots increasing to 20 to 30 knots after midnight. Snow showers likely. Waves building to 3 to 5 feet occasionally to 7 feet. .SATURDAY...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots. A chance of snow showers. Waves subsiding to 1 to 3 feet. .SUNDAY...Northwest winds 15 to 25 knots. A chance of snow showers. Waves subsiding to calm to 2 feet. Note, wave height forecasts are for ice free areas. $$ LSZ266-030900- 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 Tue Dec 2 2025 ...GALE WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY MORNING... .LATE THIS AFTERNOON...Southwest winds 20 to 30 knots. Waves 3 to 6 feet occasionally to 8 feet. .TONIGHT...Southwest winds 20 to 30 knots veering west late. A chance of snow showers in the evening, then snow showers likely after midnight. Waves building to 4 to 8 feet occasionally to 10 feet. .WEDNESDAY...Northwest gales to 40 knots. Freezing spray. Snow showers likely. Waves building to 9 to 12 feet occasionally to 15 feet. .WEDNESDAY NIGHT...Northwest gales to 40 knots. Freezing spray. Snow showers. Waves building to 10 to 14 feet occasionally to 18 feet. .THURSDAY...Northwest winds 20 to 30 knots backing southwest in the afternoon. Freezing spray in the morning. A chance of snow showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .THURSDAY NIGHT...Southwest gales to 35 knots. Freezing spray. Snow showers. Waves building to 5 to 9 feet occasionally to 11 feet. .FRIDAY...West winds 20 to 30 knots diminishing to 15 to 25 knots in the afternoon. Snow showers in the morning, then a chance of snow showers in the afternoon. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .FRIDAY NIGHT...West winds 15 to 25 knots. Snow showers. Waves building to 3 to 6 feet occasionally to 8 feet. .SATURDAY...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots. Freezing spray. Snow showers. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 2 to 4 feet. .SUNDAY...Northwest winds 15 to 25 knots. A chance of snow showers. Waves 2 to 4 feet. Note, wave height forecasts are for ice free areas. $$ LSZ267-030900- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 400 PM EST Tue Dec 2 2025 ...GALE WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY MORNING... .LATE THIS AFTERNOON...Southwest winds 20 to 30 knots. Waves 3 to 6 feet occasionally to 8 feet. .TONIGHT...Southwest gales to 35 knots diminishing to 20 to 30 knots late. A slight chance of snow showers in the evening, then snow showers after midnight. Waves building to 4 to 7 feet occasionally to 9 feet. .WEDNESDAY...Northwest gales to 40 knots. Snow showers. Freezing spray in the afternoon. Waves building to 8 to 12 feet occasionally to 15 feet. .WEDNESDAY NIGHT...Northwest gales to 40 knots. Freezing spray. Snow showers. Waves building to 10 to 14 feet occasionally to 18 feet. .THURSDAY...Northwest winds 20 to 30 knots becoming west 15 to 25 knots in the afternoon. Freezing spray in the morning. Snow showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .THURSDAY NIGHT...Southwest gales to 35 knots. Freezing spray. Snow showers. Waves building to 5 to 9 feet occasionally to 11 feet. .FRIDAY...West winds 20 to 30 knots diminishing to 15 to 25 knots in the afternoon. Snow showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .FRIDAY NIGHT...West winds 15 to 25 knots increasing to 20 to 30 knots after midnight. Snow showers. Waves building to 3 to 6 feet occasionally to 8 feet. .SATURDAY...Northwest winds 20 to 30 knots becoming north 15 to 25 knots. Snow showers. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 2 to 4 feet. .SUNDAY...Northwest winds 15 to 25 knots. A chance of snow showers. Waves 2 to 4 feet. Note, wave height forecasts are for ice free areas. $$ LSZ261-030300- MAFOR 0222/ Superior West 11540 11530 11637 11730 14740. Waves 3 to 6 feet tonight. Waves 3 to 6 feet building to 4 to 7 feet Wednesday. Superior North Central 12540 11647 11737 14750. Waves 5 to 8 feet tonight. Waves 6 to 10 feet subsiding to 5 to 8 feet Wednesday. Superior South Central 13530 11637 11747 11757 12750. Waves 2 to 4 feet building to 3 to 6 feet tonight. Waves 4 to 7 feet building to 8 to 11 feet Wednesday. Superior East 13540 11547 11647 13757. Waves 3 to 6 feet building to 5 to 7 feet tonight. Waves 6 to 10 feet building to 8 to 11 feet Wednesday. $$ 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