Great Lakes Forecast
Issued by NWS
Issued by NWS
067 FZUS63 KMQT 060748 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 348 AM EDT Thu Jun 6 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 29.3 inches early this morning weakens as a secondary trough of 29.4 inches moves through Lake Superior today before leaving late this afternoon. The troughing over Lake Superior weakens to 29.6 inches by Friday as the parent low, currently 29.2 inches just southwest of Hudson Bay, fills to 29.4 inches over southern James Bay. Weak troughing at 29.7 inches remains in place over Lake Superior Saturday before ridging near 30.0 inches pushes into the lake late Sunday as a high pressure shifts into the Canadian Prairies. The ridge builds to 30.1 inches over Lake Superior Monday morning as the high moves overhead and deteriorates with time. LSZ162-061600- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 348 AM EDT Thu Jun 6 2024 /248 AM CDT Thu Jun 6 2024/ .EARLY THIS MORNING...West winds 15 to 25 knots. A slight chance of showers. Waves 2 to 4 feet. .TODAY...West winds 20 to 30 knots. A chance of showers. Waves 2 to 4 feet. .TONIGHT...West winds 15 to 25 knots. A slight chance of showers through midnight. Waves 2 to 4 feet. .FRIDAY...West winds 15 to 25 knots. Waves subsiding to 1 to 3 feet. .FRIDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .SATURDAY...West winds 15 to 25 knots. A chance of showers. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .SATURDAY NIGHT...West winds 10 to 20 knots veering northwest after midnight. A chance of showers. Waves subsiding to calm to 2 feet. .SUNDAY...Northwest winds 10 to 20 knots becoming north 5 to 15 knots. Waves calm to 2 feet. .MONDAY...East winds 5 to 15 knots veering south. Waves calm to 2 feet. $$ LSZ263-061600- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 348 AM EDT Thu Jun 6 2024 .EARLY THIS MORNING...West winds 15 to 25 knots. A slight chance of showers. Waves 2 to 4 feet building to 3 to 5 feet occasionally to 7 feet. .TODAY...West winds 15 to 25 knots increasing to 20 to 30 knots in the afternoon. A chance of showers. Waves building to 3 to 6 feet occasionally to 8 feet. .TONIGHT...West winds 15 to 25 knots diminishing to 10 to 20 knots after midnight, then increasing to 15 to 25 knots late. A slight chance of showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .FRIDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots late. A slight chance of showers through early afternoon. Waves subsiding to 2 to 4 feet. .FRIDAY NIGHT...West winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .SATURDAY...West winds 10 to 20 knots. A chance of showers. Waves building to 2 to 4 feet. .SATURDAY NIGHT...West winds 5 to 15 knots veering northwest after midnight. A chance of showers. Waves subsiding to 1 to 3 feet. .SUNDAY...Northwest winds 10 to 20 knots becoming north 5 to 15 knots. Waves subsiding to calm to 2 feet. .MONDAY...Northeast winds 5 to 15 knots veering southwest. Waves calm to 2 feet. $$ LSZ264-061600- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 348 AM EDT Thu Jun 6 2024 .EARLY THIS MORNING...West winds 10 to 20 knots. Waves 2 to 4 feet. .TODAY...West winds 15 to 25 knots increasing to 20 to 30 knots in the afternoon. A chance of rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. .TONIGHT...West winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. A slight chance of rain showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .FRIDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots late. A slight chance of showers. Waves subsiding to 2 to 4 feet. .FRIDAY NIGHT...West winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .SATURDAY...West winds 10 to 20 knots. Waves building to 2 to 4 feet. .SATURDAY NIGHT...West winds 5 to 15 knots veering northwest after midnight. A chance of showers. Waves subsiding to 1 to 3 feet. .SUNDAY...Northwest winds 10 to 20 knots veering north. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .MONDAY...North winds 5 to 15 knots backing southwest. Waves subsiding to calm to 2 feet. $$ LSZ265-061600- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 348 AM EDT Thu Jun 6 2024 .EARLY THIS MORNING...West winds 10 to 20 knots. Waves calm to 2 feet. .TODAY...West winds 15 to 25 knots increasing to 20 to 30 knots late. A chance of showers. Waves building to 2 to 4 feet. .TONIGHT...West winds 20 to 30 knots. A slight chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .FRIDAY...West winds 20 to 30 knots diminishing to 15 to 25 knots late. A slight chance of showers through early afternoon. Waves subsiding to 1 to 3 feet. .FRIDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .SATURDAY...West winds 10 to 20 knots increasing to 15 to 25 knots by mid afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...West winds 10 to 20 knots. A chance of showers. Waves calm to 2 feet. .SUNDAY...Northwest winds 15 to 25 knots becoming north 10 to 20 knots. Waves building to 1 to 3 feet. .MONDAY...North winds 10 to 20 knots becoming southwest 5 to 15 knots. Waves subsiding to calm to 2 feet. $$ LSZ266-061600- 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- 348 AM EDT Thu Jun 6 2024 .EARLY THIS MORNING...Southwest winds 10 to 20 knots. A slight chance of showers and thunderstorms. Waves 1 to 3 feet. .TODAY...Southwest winds 10 to 20 knots becoming west 15 to 25 knots in the afternoon. A chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet. .TONIGHT...West winds 15 to 25 knots increasing to 20 to 30 knots after midnight. A chance of 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 late. A slight chance of showers. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .FRIDAY NIGHT...West winds 10 to 20 knots. A slight chance of showers through midnight. Waves subsiding to 1 to 3 feet. .SATURDAY...West winds 10 to 20 knots. Waves 1 to 3 feet. .SATURDAY NIGHT...West winds 10 to 20 knots veering northwest after midnight. A chance of showers. Waves 1 to 3 feet. .SUNDAY...Northwest winds 15 to 25 knots becoming north 10 to 20 knots. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .MONDAY...North winds 10 to 20 knots becoming west 5 to 15 knots. Waves subsiding to calm to 2 feet. $$ LSZ267-061600- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 348 AM EDT Thu Jun 6 2024 .EARLY THIS MORNING...Southwest winds 10 to 20 knots. A slight chance of showers and thunderstorms. Waves calm to 2 feet. .TODAY...Southwest winds 10 to 20 knots veering west in the afternoon. A slight chance of thunderstorms through early afternoon. A chance of showers. Waves building to 1 to 3 feet. .TONIGHT...West winds 10 to 20 knots increasing to 15 to 25 knots after midnight. A chance of showers. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...West winds 20 to 30 knots. A chance of showers. Waves building to 4 to 8 feet occasionally to 10 feet. .FRIDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. A slight chance of showers through midnight. Waves subsiding to 1 to 3 feet. .SATURDAY...West winds 10 to 20 knots. Waves 1 to 3 feet. .SATURDAY NIGHT...West winds 10 to 20 knots veering northwest after midnight. A chance of showers. Waves 1 to 3 feet. .SUNDAY...Northwest winds 15 to 25 knots becoming north 10 to 20 knots. Waves building to 2 to 4 feet. .MONDAY...Northwest winds 10 to 20 knots diminishing to 5 to 15 knots. Waves subsiding to calm to 2 feet. $$ LSZ261-061600- MAFOR 0609/ Superior West 15630 12620. A chance of showers this afternoon. Waves 3 to 5 feet today. Waves 3 to 5 feet subsiding to 2 to 4 feet tonight. Superior North Central 11520 15630 11620. A chance of showers today. Waves 2 to 4 feet building to 3 to 6 feet today. Waves 3 to 6 feet tonight. Superior South Central 11520 11620 15630. A chance of showers today. Waves 1 to 3 feet building to 2 to 4 feet today. Waves 3 to 5 feet tonight. Superior East 13510 11610 12620 12630. A chance of showers early this morning. A chance of showers this afternoon. A chance of showers tonight. Waves 1 to 3 feet today. Waves 2 to 4 feet building to 3 to 6 feet tonight. $$ TAP Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes