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Great Lakes Forecast
Issued by NWS
Issued by NWS
559 FZUS63 KMQT 131342 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 942 AM EDT Thu Jun 13 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...A 29.6 inch trough over Lake Superior this morning gives way to ridging the rest of today through Friday, with the ridging building to 30.1 inches over the lake by Friday afternoon. This high pressure continues building to 30.2 inches as it moves over the central Great Lakes Saturday, and continues shifting east toward New England on Sunday. Deepening low pressure near 29.4 inches emerges out of the High Plains Saturday night, moving northeast towards Hudson Bay Sunday into Monday as it deepens to 29.0 inches. This low extends a 29.6 inch trough over Lake Superior Sunday night before weak ridging of 29.9 inches moves over Lake Superior from the Northern Plains Monday. A low pressure of at least 29.5 inches looks to move off the Colorado Rockies into the Northern Plains early next week. LSZ162-132145- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 942 AM EDT Thu Jun 13 2024 /842 AM CDT Thu Jun 13 2024/ .REST OF TODAY...West winds 10 to 20 knots increasing to 15 to 25 knots in the afternoon. A slight chance of showers and thunderstorms. Waves 1 to 3 feet subsiding to calm to 2 feet. .TONIGHT...West winds 10 to 20 knots becoming northwest 5 to 15 knots after midnight, then veering north late. Waves calm to 2 feet. .FRIDAY...East winds 5 to 15 knots increasing to 10 to 20 knots in the afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to 2 feet. .SATURDAY...East winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...East winds 10 to 20 knots. A chance of showers through midnight, then showers likely after midnight. Waves building to 1 to 3 feet. .SUNDAY...East winds 10 to 20 knots veering west. A chance of showers. Waves subsiding to calm to 2 feet. .MONDAY...West winds 10 to 20 knots veering northeast. A chance of showers. Waves calm to 2 feet. $$ LSZ263-132145- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 942 AM EDT Thu Jun 13 2024 .REST OF TODAY...West winds 10 to 20 knots. Patchy fog by late morning. A chance of showers and a slight chance of thunderstorms. Waves 1 to 3 feet. .TONIGHT...West winds 5 to 15 knots veering north late. Waves subsiding to calm to 2 feet. .FRIDAY...Northeast winds 5 to 15 knots veering east in the afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...East winds 5 to 15 knots veering southeast after midnight. Waves calm to 2 feet. .SATURDAY...Southeast winds 5 to 15 knots backing east by mid afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...Southeast winds 5 to 15 knots increasing to 10 to 20 knots after midnight. A chance of showers through midnight, then showers likely after midnight. Waves building to 1 to 3 feet. .SUNDAY...Southeast winds 10 to 20 knots becoming southwest 5 to 15 knots. A chance of showers. Waves subsiding to calm to 2 feet. .MONDAY...Southwest winds 5 to 15 knots backing east. A chance of showers. Waves calm to 2 feet. $$ LSZ264-132145- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 942 AM EDT Thu Jun 13 2024 .REST OF TODAY...West winds 5 to 15 knots increasing to 10 to 20 knots in the afternoon, then diminishing to 5 to 15 knots late. Patchy fog. A slight chance of showers and thunderstorms. Waves calm to 2 feet building to 1 to 3 feet, then subsiding to calm to 2 feet. .TONIGHT...West winds 5 to 15 knots veering north late. Waves calm to 2 feet. .FRIDAY...North winds 5 to 15 knots veering south late. Waves calm to 2 feet. .FRIDAY NIGHT...South winds less than 10 knots increasing to 5 to 15 knots after midnight. Waves calm to 2 feet. .SATURDAY...South winds 5 to 15 knots backing southeast by mid afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...Southeast winds 10 to 20 knots. A chance of showers. Waves building to 2 to 4 feet. .SUNDAY...Southeast winds 10 to 20 knots becoming southwest 5 to 15 knots. A chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to calm to 2 feet. .MONDAY...Southwest winds 5 to 15 knots backing east. A chance of showers. Waves calm to 2 feet. $$ LSZ265-132145- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 942 AM EDT Thu Jun 13 2024 .REST OF TODAY...West winds 10 to 20 knots becoming northwest 15 to 25 knots in the afternoon. A slight chance of showers and thunderstorms. Waves calm to 2 feet building to 1 to 3 feet, then subsiding to calm to 2 feet. .TONIGHT...Northwest winds 10 to 20 knots becoming west 5 to 15 knots after midnight, then veering northwest late. Waves calm to 2 feet. .FRIDAY...North winds 5 to 15 knots increasing to 10 to 20 knots in the afternoon, then diminishing to 5 to 15 knots late. Waves calm to 2 feet. .FRIDAY NIGHT...South winds 5 to 15 knots backing southeast after midnight. Waves calm to 2 feet. .SATURDAY...Southeast winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...South winds 10 to 20 knots becoming southeast 15 to 25 knots after midnight. A chance of showers. Waves calm to 2 feet. .SUNDAY...Southeast winds 15 to 25 knots becoming south 10 to 20 knots. A chance of showers. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .MONDAY...Southwest winds 10 to 20 knots backing southeast. A chance of showers. Waves calm to 2 feet. $$ LSZ266-132145- 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- 942 AM EDT Thu Jun 13 2024 .REST OF TODAY...West winds 10 to 20 knots veering northwest in the afternoon. Patchy fog. A slight chance of showers and thunderstorms. Waves calm to 2 feet building to 1 to 3 feet. .TONIGHT...Northwest winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .FRIDAY...North winds 5 to 15 knots becoming northwest 10 to 20 knots in the afternoon, then diminishing to 5 to 15 knots late. Waves calm to 2 feet. .FRIDAY NIGHT...West winds 5 to 15 knots backing south after midnight. Waves calm to 2 feet. .SATURDAY...South winds 5 to 15 knots becoming southeast 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...South winds 15 to 25 knots backing southeast after midnight. A chance of showers. Waves building to 2 to 4 feet. .SUNDAY...Southeast winds 15 to 25 knots becoming south 10 to 20 knots. A chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to calm to 2 feet. .MONDAY...Southwest winds 10 to 20 knots backing south. A chance of showers. Waves calm to 2 feet. $$ LSZ267-132145- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 942 AM EDT Thu Jun 13 2024 .REST OF TODAY...Southwest winds 10 to 20 knots veering west in the afternoon. A slight chance of showers and thunderstorms. Patchy fog by mid afternoon. Waves calm to 2 feet building to 1 to 3 feet. .TONIGHT...West winds 10 to 20 knots veering northwest after midnight. Waves subsiding to calm to 2 feet. .FRIDAY...Northwest winds 5 to 15 knots increasing to 10 to 20 knots in the afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...Northwest winds 5 to 15 knots backing southeast after midnight. Waves calm to 2 feet. .SATURDAY...Southeast winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...Southeast winds 10 to 20 knots increasing to 15 to 25 knots after midnight. A chance of showers after midnight. Waves building to 1 to 3 feet. .SUNDAY...Southeast winds 15 to 25 knots becoming south 10 to 20 knots. Showers likely. A chance of showers. Waves building to 2 to 4 feet, then subsiding to calm to 2 feet. .MONDAY...South winds 10 to 20 knots. A chance of showers. Waves calm to 2 feet. $$ LSZ261-132145- MAFOR 1315/ Superior West 12620 12610 11600 11700 11800 11100. Waves 1 to 3 feet this afternoon and tonight. Waves 1 foot or less Friday morning. Superior North Central 11710 11620 13610 11710 12810. Waves 1 to 3 feet. Superior South Central 11620 12720 11710 11600 13700. Waves 1 to 3 feet this afternoon and tonight. Waves 1 foot or less Friday morning. Superior East 12610 14710 11710 11700. Waves 2 to 3 feet. $$ TAP Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes