Great Lakes Forecast
Issued by NWS
Issued by NWS
691 FZUS63 KMQT 282101 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 400 PM EST Sun Dec 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... Deepening low near Chicago is set to continue its northward track tonight through Monday. This low deepens to 28.9 inches as it lifts to Lake Huron. Meanwhile, a strong high pressure of at least 30.6 inches will spread across the Great Plains as the low lifts into Quebec on Monday. A 29.7 inch trough dives southeast into the Upper Great Lakes late Tuesday. Weak ridging of around 30.0 inches on Wednesday will be followed up by additional 29.6-29.7inch shortwaves skirting the region the rest of the work week. LSZ162-290900- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 400 PM EST Sun Dec 28 2025 /300 PM CST Sun Dec 28 2025/ ...GALE WARNING IN EFFECT THROUGH MONDAY EVENING... ...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 10 PM EST /9 PM CST/ THIS EVENING THROUGH MONDAY EVENING... .LATE THIS AFTERNOON...North gales to 35 knots. Areas of dense fog and dense freezing fog. Snow. Waves 4 to 8 feet occasionally to 10 feet. .TONIGHT...North gales to 45 knots. Heavy freezing spray. Snow likely in the evening. A slight chance of snow after midnight. Waves building to 10 to 14 feet occasionally to 18 feet. .MONDAY...North gales to 40 knots becoming northwest gales to 35 knots. Heavy freezing spray. Waves subsiding to 4 to 7 feet occasionally to 9 feet. .MONDAY NIGHT...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots by midnight, then becoming west 10 to 20 knots late. Waves subsiding to calm to 2 feet. .TUESDAY...West winds 10 to 20 knots increasing to 15 to 25 knots in the afternoon. Snow showers in the morning, then a chance of snow showers in the afternoon. Waves building to 2 to 4 feet. .TUESDAY NIGHT...Northwest winds 20 to 30 knots. Waves 2 to 4 feet. .WEDNESDAY...Northwest winds 20 to 30 knots. Waves 2 to 4 feet. .WEDNESDAY NIGHT...Northwest winds 20 to 30 knots. Waves 2 to 4 feet. .THURSDAY...West gales to 35 knots. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. .FRIDAY...West winds 15 to 25 knots becoming northwest 10 to 20 knots. Waves subsiding to calm to 2 feet. Note, wave height forecasts are for ice free areas. $$ 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 Sun Dec 28 2025 ...STORM WARNING IN EFFECT THROUGH MONDAY EVENING... ...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 1 AM EST MONDAY THROUGH MONDAY EVENING... .LATE THIS AFTERNOON...North gales to 35 knots. Areas of dense freezing fog and patchy fog. Snow, possibly mixed with rain. Waves 6 to 9 feet occasionally to 11 feet building to 7 to 10 feet occasionally to 13 feet. .TONIGHT...North gales to 40 knots increasing to storm force winds to 55 knots by midnight. Heavy freezing spray. Snow in the evening. A chance of snow after midnight. Waves building to 17 to 22 feet occasionally to 28 feet. .MONDAY...North storm force winds to 55 knots diminishing to gales to 45 knots by late morning, then becoming northwest gales to 40 knots by mid afternoon. A slight chance of snow in the morning. Heavy freezing spray. Waves subsiding to 8 to 11 feet occasionally to 14 feet. .MONDAY NIGHT...Northwest gales to 35 knots diminishing to 15 to 25 knots. Freezing spray. Waves subsiding to 2 to 4 feet. .TUESDAY...West winds 15 to 25 knots. Snow showers. Waves building to 4 to 7 feet occasionally to 9 feet. .TUESDAY NIGHT...Northwest winds 20 to 30 knots increasing to gales to 35 knots after midnight. Heavy freezing spray. Waves subsiding to 3 to 6 feet occasionally to 8 feet, then building to 5 to 8 feet occasionally to 10 feet. .WEDNESDAY...Northwest gales to 35 knots diminishing to 20 to 30 knots in the afternoon. Heavy freezing spray. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY NIGHT...Northwest gales to 35 knots diminishing to 20 to 30 knots after midnight. Heavy freezing spray. Waves building to 4 to 7 feet occasionally to 9 feet. .THURSDAY...West gales to 40 knots. Heavy freezing spray. Waves building to 5 to 9 feet occasionally to 11 feet. .FRIDAY...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots. Heavy freezing spray. Waves subsiding to 1 to 3 feet. Note, wave height forecasts are for ice free areas. $$ 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 Sun Dec 28 2025 ...STORM WARNING IN EFFECT THROUGH MONDAY EVENING... ...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 1 AM EST MONDAY THROUGH MONDAY EVENING... .LATE THIS AFTERNOON...Northeast gales to 35 knots. Areas of dense fog. Snow, possibly mixed with rain. Waves 5 to 8 feet occasionally to 10 feet building to 7 to 10 feet occasionally to 13 feet. .TONIGHT...North gales to 40 knots increasing to storm force winds to 60 knots by midnight. Heavy freezing spray. Snow in the evening. A chance of snow after midnight. Waves building to 17 to 22 feet occasionally to 28 feet. .MONDAY...North storm force winds to 55 knots diminishing to gales to 45 knots by mid afternoon. Heavy freezing spray. A slight chance of snow. Waves subsiding to 12 to 17 feet occasionally to 21 feet. .MONDAY NIGHT...Northwest gales to 40 knots diminishing to 20 to 30 knots late. Heavy freezing spray. Waves subsiding to 5 to 8 feet occasionally to 10 feet. .TUESDAY...Northwest winds 15 to 25 knots. Freezing spray in the morning. A chance of snow showers in the morning, then snow showers likely in the afternoon. Waves subsiding to 2 to 4 feet, then building to 3 to 6 feet occasionally to 8 feet. .TUESDAY NIGHT...Northwest gales to 40 knots. Heavy freezing spray. A chance of snow showers. Waves building to 9 to 12 feet occasionally to 15 feet. .WEDNESDAY...Northwest gales to 40 knots. Heavy freezing spray. Waves subsiding to 6 to 9 feet occasionally to 11 feet. .WEDNESDAY NIGHT...Northwest gales to 35 knots. Heavy freezing spray. Waves 6 to 9 feet occasionally to 11 feet. .THURSDAY...Northwest gales to 45 knots. Heavy freezing spray. Waves building to 6 to 10 feet occasionally to 13 feet. .FRIDAY...Northwest gales to 35 knots diminishing to 15 to 25 knots. Heavy freezing spray. Waves subsiding to 2 to 4 feet. Note, wave height forecasts are for ice free areas. $$ LSZ265-290900- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 400 PM EST Sun Dec 28 2025 ...STORM WARNING IN EFFECT FROM 10 PM EST THIS EVENING THROUGH MONDAY EVENING... ...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 3 AM EST MONDAY THROUGH MONDAY EVENING... .LATE THIS AFTERNOON...Northeast winds 20 to 30 knots. Patchy fog. Rain and snow. Waves 2 to 4 feet building to 3 to 5 feet occasionally to 7 feet. .TONIGHT...Northeast gales to 40 knots becoming north storm force winds to 60 knots by midnight. A slight chance of rain in the evening. Snow. Freezing spray after midnight. Waves building to 22 to 27 feet occasionally to 34 feet. .MONDAY...North storm force winds to 55 knots becoming northwest storm force winds to 50 knots by mid afternoon. Heavy freezing spray. Snow likely, possibly mixed with freezing rain in the morning. A chance of snow in the afternoon. Waves subsiding to 15 to 20 feet occasionally to 25 feet. .MONDAY NIGHT...Northwest gales to 45 knots. Heavy freezing spray. Waves subsiding to 6 to 9 feet occasionally to 11 feet. .TUESDAY...Northwest winds 20 to 30 knots backing west in the afternoon. Freezing spray in the morning. A chance of snow showers in the morning, then snow showers in the afternoon. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .TUESDAY NIGHT...Northwest gales to 45 knots. Heavy freezing spray. Snow showers likely in the evening. A chance of snow showers after midnight. Waves building to 10 to 14 feet occasionally to 18 feet. .WEDNESDAY...Northwest gales to 45 knots. Heavy freezing spray. A chance of snow showers. Waves subsiding to 7 to 10 feet occasionally to 13 feet. .WEDNESDAY NIGHT...Northwest gales to 40 knots. Heavy freezing spray. A chance of snow showers. Waves subsiding to 6 to 9 feet occasionally to 11 feet. .THURSDAY...West gales to 45 knots. Heavy freezing spray. A chance of snow showers. Waves building to 6 to 10 feet occasionally to 13 feet. .FRIDAY...Northwest gales to 40 knots diminishing to 20 to 30 knots. Heavy freezing spray. A chance of snow showers. Waves subsiding to 1 to 3 feet. Note, wave height forecasts are for ice free areas. $$ 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 Sun Dec 28 2025 ...STORM WARNING IN EFFECT FROM 10 PM EST THIS EVENING THROUGH MONDAY EVENING... ...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 3 AM EST MONDAY THROUGH MONDAY EVENING... .LATE THIS AFTERNOON...Northeast winds 20 to 30 knots. Patchy fog. Rain and snow, possibly mixed with sleet. Waves 2 to 4 feet building to 3 to 6 feet occasionally to 8 feet. .TONIGHT...Northeast gales to 40 knots becoming north storm force winds to 60 knots by midnight. A slight chance of rain in the evening. Snow. Freezing spray after midnight. Waves building to 22 to 27 feet occasionally to 34 feet. .MONDAY...North storm force winds to 60 knots. Heavy freezing spray. A chance of snow. Waves building to 25 to 30 feet occasionally to 38 feet, then subsiding to 20 to 25 feet occasionally to 31 feet. .MONDAY NIGHT...North storm force winds to 50 knots becoming northwest gales to 40 knots by midnight. Heavy freezing spray. A slight chance of freezing rain in the evening. A slight chance of snow showers. Waves subsiding to 10 to 14 feet occasionally to 18 feet. .TUESDAY...Northwest winds 20 to 30 knots backing west in the afternoon. Freezing spray. A chance of snow showers in the morning. Snow showers in the afternoon. Waves subsiding to 4 to 7 feet occasionally to 9 feet. .TUESDAY NIGHT...Northwest gales to 45 knots. Heavy freezing spray. Snow showers. Waves building to 11 to 15 feet occasionally to 19 feet. .WEDNESDAY...Northwest gales to 40 knots. Heavy freezing spray. Snow showers in the morning. A chance of snow showers in the afternoon. Waves building to 12 to 17 feet occasionally to 21 feet, then subsiding to 10 to 14 feet occasionally to 18 feet. .WEDNESDAY NIGHT...Northwest gales to 40 knots. Heavy freezing spray. Snow showers. Waves subsiding to 9 to 12 feet occasionally to 15 feet. .THURSDAY...Northwest gales to 45 knots backing west. Heavy freezing spray. Snow showers likely. Waves building to 10 to 14 feet occasionally to 18 feet, then subsiding to 9 to 12 feet occasionally to 15 feet. .FRIDAY...Northwest gales to 35 knots diminishing to 20 to 30 knots. Freezing spray. A chance of snow showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet. Note, wave height forecasts are for ice free areas. $$ LSZ267-290900- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 400 PM EST Sun Dec 28 2025 ...STORM WARNING IN EFFECT FROM 10 PM EST THIS EVENING THROUGH MONDAY EVENING... ...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 3 AM EST MONDAY THROUGH MONDAY EVENING... .LATE THIS AFTERNOON...East winds 15 to 25 knots. Patchy fog. Rain likely, possibly mixed with snow and sleet. Waves 2 to 4 feet. .TONIGHT...Northeast gales to 35 knots increasing to storm force winds to 55 knots by midnight, then backing north late. A slight chance of rain and sleet in the evening. Snow. Freezing spray after midnight. Waves building to 17 to 22 feet occasionally to 28 feet. .MONDAY...North storm force winds to 60 knots. Heavy freezing spray. Snow in the morning. A chance of snow in the afternoon. Waves building to 20 to 25 feet occasionally to 31 feet, then subsiding to 17 to 22 feet occasionally to 28 feet. .MONDAY NIGHT...North storm force winds to 50 knots diminishing to gales to 45 knots by midnight, then becoming northwest gales to 40 knots late. Heavy freezing spray. A slight chance of snow showers. Waves subsiding to 10 to 14 feet occasionally to 18 feet. .TUESDAY...Northwest gales to 35 knots diminishing to 20 to 30 knots in the afternoon. Freezing spray. A slight chance of snow showers in the morning. Snow showers in the afternoon. Waves subsiding to 4 to 7 feet occasionally to 9 feet. .TUESDAY NIGHT...Northwest winds 20 to 30 knots becoming north gales to 35 knots after midnight. Freezing spray. Snow showers. Waves building to 10 to 14 feet occasionally to 18 feet. .WEDNESDAY...North gales to 35 knots backing northwest in the afternoon. Heavy freezing spray. Snow showers likely. Waves 10 to 14 feet occasionally to 18 feet. .WEDNESDAY NIGHT...Northwest gales to 35 knots. Heavy freezing spray. Snow showers. Waves subsiding to 9 to 12 feet occasionally to 15 feet. .THURSDAY...Northwest gales to 40 knots backing west. Heavy freezing spray. Snow showers likely. Waves building to 10 to 14 feet occasionally to 18 feet, then subsiding to 9 to 12 feet occasionally to 15 feet. .FRIDAY...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots. Freezing spray. Snow showers likely. A chance of snow showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet. Note, wave height forecasts are for ice free areas. $$ LSZ261-290300- MAFOR 2822/ Superior West...STORM WARNING IN EFFECT...HEAVY FREEZING SPRAY WARNING IN EFFECT...11857 19854 11867 11860 11870 12862 11752 11750. Waves 5 to 8 feet building to 12 to 16 feet tonight. Waves 10 to 15 feet subsiding to 6 to 9 feet Monday. Superior North Central...STORM WARNING IN EFFECT...HEAVY FREEZING SPRAY WARNING IN EFFECT...11157 19154 11167 11877 11870 13872 11862. Waves 4 to 7 feet building to 17 to 22 feet tonight. Waves 17 to 22 feet subsiding to 13 to 17 feet Monday. Superior South Central...STORM WARNING IN EFFECT...HEAVY FREEZING SPRAY WARNING IN EFFECT...11147 11167 14877 11877 11772. Waves 2 to 4 feet building to 20 to 25 feet tonight. Waves 21 to 26 feet subsiding to 18 to 23 feet Monday. Superior East...STORM WARNING IN EFFECT...HEAVY FREEZING SPRAY WARNING IN EFFECT...11147 11157 11177 13877 12872. Waves 3 to 6 feet building to 15 to 19 feet tonight. Waves 16 to 21 feet Monday. $$ 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