####018010688#### FZUS63 KMQT 030750 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 350 AM EDT Fri May 3 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 29.7 inch low pressure strengthens to 29.6 inches and moves into Ontario today while dragging a 29.8 inch trough with it across Lake Superior. A weak 30.0 inch trough pivots across the lake on Saturday ahead of ridging that builds to 30.1 inches by Saturday evening; this ridging persists through Sunday. Ridging shifts east early next week as a broad 29.2 inch low pressure develops on the Northern Plains on Monday. A strong pressure gradient over western Lake Superior begins to setup Tuesday morning as the 29.2 inch low center pushes eastward against 30.0 inch ridging over far northern Ontario. LSZ162-031600- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 350 AM EDT Fri May 3 2024 /250 AM CDT Fri May 3 2024/ .EARLY THIS MORNING...Southwest winds 5 to 15 knots. Patchy fog. Waves 1 to 3 feet subsiding to calm to 2 feet. .TODAY...Southwest winds 10 to 20 knots increasing to 15 to 25 knots in the afternoon. Patchy dense fog through early afternoon. Waves building to 3 to 5 feet occasionally to 7 feet. .TONIGHT...Southwest winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. A slight chance of rain showers after midnight. Waves subsiding to calm to 2 feet. .SATURDAY...West winds 5 to 15 knots veering northwest in the afternoon, then backing southwest late. A chance of rain showers. Waves calm to 2 feet. .SATURDAY NIGHT...West winds 5 to 15 knots increasing to 10 to 20 knots after midnight. Waves calm to 2 feet. .SUNDAY...West winds 10 to 20 knots backing southwest by mid afternoon. Waves building to 1 to 3 feet. .SUNDAY NIGHT...South winds 5 to 15 knots backing northeast after midnight. Waves subsiding to calm to 2 feet. .MONDAY...East winds 10 to 20 knots increasing to 20 to 30 knots. A chance of rain showers. Waves building to 3 to 5 feet occasionally to 7 feet. .TUESDAY...East winds 20 to 30 knots becoming northeast 15 to 25 knots. Rain showers. A chance of rain showers. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. $$ LSZ263-031600- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 350 AM EDT Fri May 3 2024 .EARLY THIS MORNING...Southwest winds 5 to 15 knots. Patchy fog. A slight chance of rain showers. Waves 1 to 3 feet. .TODAY...Southwest winds 10 to 20 knots increasing to 15 to 25 knots in the afternoon. Patchy fog through early afternoon. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .TONIGHT...Southwest winds 10 to 20 knots diminishing to 5 to 15 knots late. A slight chance of rain showers after midnight. Waves subsiding to calm to 2 feet. .SATURDAY...West winds less than 10 knots becoming north 5 to 15 knots in the afternoon, then backing northwest late. A chance of rain showers. Waves calm to 2 feet. .SATURDAY NIGHT...West winds 5 to 15 knots. Waves building to 1 to 3 feet. .SUNDAY...West winds 5 to 15 knots backing southwest by mid afternoon. Waves subsiding to calm to 2 feet, then building to 2 to 4 feet. .SUNDAY NIGHT...Southwest winds 5 to 15 knots backing south after midnight. Waves subsiding to calm to 2 feet. .MONDAY...East winds 10 to 20 knots. A chance of rain showers. Waves building to 2 to 4 feet. .TUESDAY...East winds 20 to 30 knots diminishing to 15 to 25 knots. Rain showers likely. A chance of rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. $$ LSZ264-031600- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 350 AM EDT Fri May 3 2024 .EARLY THIS MORNING...South winds 5 to 15 knots. Patchy fog. A slight chance of rain showers. Waves 2 to 4 feet. .TODAY...Southwest winds 10 to 20 knots increasing to 15 to 25 knots late. Patchy fog through early afternoon. Waves 2 to 4 feet. .TONIGHT...Southwest winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet. .SATURDAY...Southwest winds less than 10 knots becoming southeast 5 to 15 knots in the afternoon, then backing north late. A chance of rain showers. Waves subsiding to calm to 2 feet. .SATURDAY NIGHT...West winds 5 to 15 knots veering northwest after midnight. A slight chance of rain showers through midnight. Waves building to 1 to 3 feet. .SUNDAY...West winds 5 to 15 knots backing southwest by mid afternoon. Waves 1 to 3 feet. .SUNDAY NIGHT...Southwest winds 5 to 15 knots backing south after midnight. Waves subsiding to calm to 2 feet. .MONDAY...East winds 5 to 15 knots increasing to 10 to 20 knots. Waves building to 2 to 4 feet. .TUESDAY...East winds 20 to 30 knots diminishing to 15 to 25 knots. Rain showers likely. A chance of rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. $$ LSZ265-031600- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 350 AM EDT Fri May 3 2024 .EARLY THIS MORNING...South winds 5 to 15 knots. Patchy fog. Waves 1 to 3 feet. .TODAY...West winds 5 to 15 knots backing southwest in the afternoon, then becoming south 10 to 20 knots late. Patchy fog through early afternoon. Waves subsiding to calm to 2 feet. .TONIGHT...South winds 5 to 15 knots veering southwest after midnight, then backing south late. Waves calm to 2 feet. .SATURDAY...South winds 5 to 15 knots becoming east 10 to 20 knots in the afternoon. A chance of showers. Waves calm to 2 feet. .SATURDAY NIGHT...Northwest winds 10 to 20 knots backing west after midnight. A slight chance of rain showers through midnight. Waves building to 1 to 3 feet. .SUNDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots by mid afternoon. Waves subsiding to calm to 2 feet. .SUNDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet. .MONDAY...East winds 5 to 15 knots becoming southeast 15 to 25 knots. Waves building to 1 to 3 feet. .TUESDAY...East winds 20 to 30 knots diminishing to 15 to 25 knots. Rain showers likely. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. $$ LSZ266-031600- 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- 350 AM EDT Fri May 3 2024 .EARLY THIS MORNING...South winds 5 to 15 knots. Patchy fog. A slight chance of rain showers. Waves 2 to 4 feet. .TODAY...Southwest winds 5 to 15 knots backing southeast late. Patchy fog through early afternoon. Waves subsiding to 1 to 3 feet. .TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots after midnight, then diminishing to 5 to 15 knots late. Waves 1 to 3 feet. .SATURDAY...South winds 5 to 15 knots becoming southeast 10 to 20 knots in the afternoon, then backing east late. A chance of rain showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .SATURDAY NIGHT...Northwest winds 10 to 20 knots increasing to 15 to 25 knots after midnight. A chance of rain showers. Waves subsiding to calm to 2 feet, then building to 2 to 4 feet. .SUNDAY...Northwest winds 10 to 20 knots becoming west 5 to 15 knots by mid afternoon. Waves subsiding to 1 to 3 feet. .SUNDAY NIGHT...Southwest winds 5 to 15 knots backing south after midnight. Waves subsiding to calm to 2 feet. .MONDAY...East winds 5 to 15 knots becoming southeast 10 to 20 knots. Waves building to 2 to 4 feet. .TUESDAY...East winds 20 to 30 knots diminishing to 15 to 25 knots. Rain showers likely. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. $$ LSZ267-031600- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 350 AM EDT Fri May 3 2024 .EARLY THIS MORNING...Southeast winds 15 to 25 knots. Patchy fog. A chance of rain showers and a slight chance of thunderstorms. Waves 3 to 5 feet occasionally to 7 feet subsiding to 2 to 4 feet. .TODAY...Southwest winds 10 to 20 knots becoming west 5 to 15 knots in the afternoon, then backing southeast late. Patchy fog through early afternoon. A chance of rain showers and a slight chance of thunderstorms through early afternoon. Waves subsiding to calm to 2 feet. .TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots after midnight. Waves calm to 2 feet. .SATURDAY...Southeast winds 10 to 20 knots. A chance of rain showers by mid afternoon. Waves building to 1 to 3 feet. .SATURDAY NIGHT...South winds 10 to 20 knots becoming west 15 to 25 knots after midnight. Rain showers likely through midnight, then a slight chance of rain showers after midnight. Waves subsiding to calm to 2 feet, then building to 2 to 4 feet. .SUNDAY...West winds 10 to 20 knots. Waves 2 to 4 feet. .SUNDAY NIGHT...West winds 10 to 20 knots backing south after midnight. Waves subsiding to calm to 2 feet. .MONDAY...East winds 10 to 20 knots veering southeast. Waves building to 1 to 3 feet. .TUESDAY...Southeast winds 15 to 25 knots. A chance of showers, then showers likely. Waves building to 2 to 4 feet. $$ LSZ261-031600- MAFOR 0309/ Superior West 12510 13530 12520 11510. Waves 2 to 4 feet building to 3 to 5 feet today then subsiding to 2 to 4 feet again tonight. Superior North Central 11410 12520 12530 12520 11510. Waves 2 to 4 feet building to 3 to 5 feet, then subsiding to 2 to 4 feet again today through tonight. Superior South Central 11400 11610 11510 11410 11300 12400 11500. Waves 1 to 3 feet today. Waves 1 foot or less tonight. Superior East 11330 12510 11400 12300 12410. A chance of rain showers this morning. Waves 3 to 5 feet subsiding to 1 to 3 feet today through tonight. $$ 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