Great Lakes Forecast
Issued by NWS
Issued by NWS
529 FZUS63 KMQT 260141 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 941 PM EDT Tue Jun 25 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... Troughing of 29.8 inches will sweep southeast across Lake Superior this evening. In its wake, 30.2 inch high pressure over the Canadian Prairies Wednesday morning will weaken to 30.0 inches as it moves southeast, reaching the Upper Mississippi Valley Wednesday night. This high will then shift east across the Great Lakes region on Thursday. As high builds to 30.1 inches while moving to New England by Friday morning, 29.4 inch low pressure will track east to the eastern Dakotas. This low will then weaken 29.6 inches as it tracks over or just north of Lake Superior during Friday night and Saturday morning. As the low heads toward southern Quebec on Saturday, 30.2 inch high pressure will build over the Northern Plains. LSZ162-260945- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 941 PM EDT Tue Jun 25 2024 /841 PM CDT Tue Jun 25 2024/ .REST OF TONIGHT...Northwest winds 10 to 20 knots veering east after midnight, then backing northeast late. A chance of showers after midnight. Waves 1 to 3 feet subsiding to calm to 2 feet, then building to 1 to 3 feet. .WEDNESDAY...Northeast winds 10 to 20 knots veering east in the afternoon, then becoming southwest 5 to 15 knots late. A slight chance of showers through early afternoon. Waves building to 2 to 4 feet, then subsiding to calm to 2 feet. .WEDNESDAY NIGHT...Southwest winds 5 to 15 knots veering northwest after midnight. Waves calm to 2 feet. .THURSDAY...Southwest winds 5 to 15 knots backing south by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...East winds 10 to 20 knots. A chance of showers. Waves calm to 2 feet. .FRIDAY...Southeast winds 15 to 25 knots backing east by mid afternoon. Showers. Waves building to 1 to 3 feet. .FRIDAY NIGHT...Northeast winds 10 to 20 knots becoming west 15 to 25 knots after midnight. A chance of showers and thunderstorms. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .SATURDAY...Northwest winds 15 to 25 knots diminishing to 10 to 20 knots. Waves building to 2 to 4 feet, then subsiding to calm to 2 feet. .SUNDAY...Southwest winds 10 to 20 knots becoming east 5 to 15 knots. Waves calm to 2 feet. $$ LSZ263-260945- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 941 PM EDT Tue Jun 25 2024 .REST OF TONIGHT...North winds 10 to 20 knots becoming northeast 5 to 15 knots after midnight, then increasing to 10 to 20 knots late. A chance of showers after midnight. Waves 2 to 4 feet subsiding to 1 to 3 feet. .WEDNESDAY...Northeast winds 10 to 20 knots diminishing to 5 to 15 knots in the afternoon, then veering southwest late. A slight chance of showers through early afternoon. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet. .THURSDAY...Southwest winds 5 to 15 knots becoming south 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...Southeast winds 5 to 15 knots. A chance of showers. Waves calm to 2 feet. .FRIDAY...Southeast winds 10 to 20 knots. Showers. Waves building to 1 to 3 feet. .FRIDAY NIGHT...Northeast winds 10 to 20 knots backing north after midnight. Showers likely through midnight. A chance of thunderstorms. A chance of showers after midnight. Waves building to 2 to 4 feet. .SATURDAY...North winds 15 to 25 knots becoming northwest 10 to 20 knots. Waves subsiding to calm to 2 feet. .SUNDAY...Southwest winds 5 to 15 knots backing south. Waves calm to 2 feet. $$ LSZ264-260945- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 941 PM EDT Tue Jun 25 2024 .REST OF TONIGHT...North winds 10 to 20 knots becoming northeast 5 to 15 knots late. A chance of showers after midnight. Waves 3 to 5 feet occasionally to 7 feet subsiding to 1 to 3 feet. .WEDNESDAY...North winds 5 to 15 knots backing west late. A chance of showers through early afternoon. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet. .THURSDAY...West winds 5 to 15 knots backing southwest by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...South winds 5 to 15 knots backing southeast after midnight. A chance of showers after midnight. Waves calm to 2 feet. .FRIDAY...Southeast winds 10 to 20 knots. Showers. Waves building to 2 to 4 feet. .FRIDAY NIGHT...Southeast winds 10 to 20 knots backing northeast after midnight. Showers likely through midnight. A chance of showers after midnight. Waves 2 to 4 feet. .SATURDAY...North winds 15 to 25 knots becoming northwest 10 to 20 knots. Waves subsiding to calm to 2 feet. .SUNDAY...West winds 5 to 15 knots backing southwest. Waves calm to 2 feet. $$ LSZ265-260945- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 941 PM EDT Tue Jun 25 2024 .REST OF TONIGHT...North winds 10 to 20 knots. A slight chance of showers after midnight. Waves 1 to 3 feet subsiding to calm to 2 feet, then building to 1 to 3 feet. .WEDNESDAY...North winds 10 to 20 knots backing northwest late. A chance of showers through early afternoon. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...Northwest winds 10 to 20 knots diminishing to 5 to 15 knots after midnight, then backing west late. Waves calm to 2 feet. .THURSDAY...West winds 5 to 15 knots becoming southeast 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...Southeast winds 10 to 20 knots veering south after midnight. Waves calm to 2 feet. .FRIDAY...Southeast winds 15 to 25 knots. A chance of showers through early afternoon, then showers likely by mid afternoon. Waves building to 1 to 3 feet. .FRIDAY NIGHT...South winds 10 to 20 knots becoming west 15 to 25 knots after midnight. Showers likely through midnight. A chance of showers after midnight. Waves subsiding to calm to 2 feet. .SATURDAY...Northwest winds 15 to 25 knots diminishing to 10 to 20 knots. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .SUNDAY...Northwest winds 10 to 20 knots becoming southwest 5 to 15 knots. Waves calm to 2 feet. $$ LSZ266-260945- 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- 941 PM EDT Tue Jun 25 2024 .REST OF TONIGHT...Northwest winds 15 to 25 knots becoming north 10 to 20 knots after midnight. A chance of showers after midnight. Waves 3 to 6 feet occasionally to 8 feet subsiding to 1 to 3 feet. .WEDNESDAY...North winds 10 to 20 knots backing northwest late. A slight chance of showers through early afternoon. Waves subsiding to 1 to 3 feet. .WEDNESDAY NIGHT...Northwest winds 10 to 20 knots. Waves 1 to 3 feet. .THURSDAY...West winds 5 to 15 knots backing southwest by mid afternoon. Waves subsiding to calm to 2 feet. .THURSDAY NIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots after midnight. Waves calm to 2 feet. .FRIDAY...Southeast winds 15 to 25 knots. A chance of showers through early afternoon, then showers likely by mid afternoon. Waves building to 2 to 4 feet. .FRIDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Showers likely through midnight. A chance of showers after midnight. 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 becoming west 5 to 15 knots. Waves subsiding to calm to 2 feet. $$ LSZ267-260945- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 941 PM EDT Tue Jun 25 2024 .REST OF TONIGHT...Northwest winds 15 to 25 knots diminishing to 10 to 20 knots after midnight, then veering north late. Waves 3 to 6 feet occasionally to 8 feet subsiding to 2 to 4 feet. .WEDNESDAY...North winds 10 to 20 knots backing northwest late. Waves subsiding to calm to 2 feet, then building to 2 to 4 feet. .WEDNESDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding to 1 to 3 feet. .THURSDAY...West winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .THURSDAY NIGHT...Southeast winds 5 to 15 knots becoming south 10 to 20 knots after midnight. Waves calm to 2 feet. .FRIDAY...Southeast winds 10 to 20 knots increasing to 15 to 25 knots by mid afternoon. A chance of showers through early afternoon, then showers likely by mid afternoon. Waves building to 1 to 3 feet. .FRIDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Showers. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .SATURDAY...West winds 15 to 25 knots veering northwest. A chance of showers. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .SUNDAY...Northwest winds 10 to 20 knots diminishing to 5 to 15 knots. Waves subsiding to calm to 2 feet. $$ LSZ261-260945- MAFOR 2603/ Superior West 11810 11220 12120 11110 11300 12500. A chance of showers Wednesday morning. Waves 1 to 3 feet. Superior North Central 11820 11810 12110 11810 11700 12610. A chance of showers Wednesday morning. Waves 3 to 5 feet subsiding to 2 to 4 feet overnight. Waves 1 to 3 feet Wednesday and Wednesday evening. Superior South Central 11820 14810 11810 12710. Waves 2 to 4 feet subsiding to 1 to 3 feet overnight. Waves 1 to 3 feet Wednesday and Wednesday evening. Superior East 11720 14810 11710 12720. Waves 3 to 6 feet overnight. Waves 2 to 4 feet Wednesday and Wednesday evening. $$ BW Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes