####018010724#### FZUS63 KMQT 200741 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 341 AM EDT Sat Apr 20 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 30.6 inch high pressure over the Northern Plains will weaken to 30.5 inches by this evening as 29.3 inch low pressure remains over northern Quebec. This high moves to the central plains by Sunday morning and weakens to 30.3 inches over the southern plains by Sunday evening. A brief period of 30.1 inch high pressure meanders south out of the Canadian Prairies Sunday night into Monday before broad 29.5 inch low pressure begins moving eastward into the Great Lakes on Tuesday. This low moves near northern Lake Superior Tuesday morning at 29.5 inches and progressively weakens to 29.6 inches while heading towards southern Ontario by Wednesday evening. A 30.3 inch high pressure over northern Ontario then moves over Lake Superior in its wake Wednesday. LSZ162-201545- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 341 AM EDT Sat Apr 20 2024 /241 AM CDT Sat Apr 20 2024/ .EARLY THIS MORNING...Northwest winds 15 to 25 knots. Waves 3 to 6 feet occasionally to 8 feet. .TODAY...Northwest winds 15 to 25 knots backing west in the afternoon. Waves subsiding to 2 to 4 feet. .TONIGHT...West winds 10 to 20 knots increasing to 15 to 25 knots late. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. .SUNDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots in the afternoon. Waves subsiding to 1 to 3 feet. .SUNDAY NIGHT...East winds 5 to 15 knots increasing to 10 to 20 knots after midnight. Waves subsiding to calm to 2 feet. .MONDAY...South winds 10 to 20 knots becoming east 15 to 25 knots by mid afternoon. A chance of rain showers by mid afternoon. Waves building to 3 to 5 feet occasionally to 7 feet. .MONDAY NIGHT...East winds 15 to 25 knots backing north after midnight. Rain showers. Snow showers after midnight. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet. .TUESDAY...Northeast winds 20 to 30 knots diminishing to 10 to 20 knots. A chance of rain and snow showers. Waves subsiding to 2 to 4 feet. .WEDNESDAY...East winds 10 to 20 knots. Waves subsiding to calm to 2 feet. $$ LSZ263-201545- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 341 AM EDT Sat Apr 20 2024 .EARLY THIS MORNING...Northwest winds 15 to 25 knots. Waves 4 to 7 feet occasionally to 9 feet. .TODAY...Northwest winds 15 to 25 knots backing west in the afternoon, then increasing to 20 to 30 knots late. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .TONIGHT...West winds 15 to 25 knots diminishing to 10 to 20 knots after midnight, then increasing to 15 to 25 knots late. Waves 3 to 6 feet occasionally to 8 feet. .SUNDAY...West winds 15 to 25 knots diminishing to 5 to 15 knots. Waves subsiding to 1 to 3 feet. .SUNDAY NIGHT...East winds 5 to 15 knots veering south after midnight. Waves subsiding to calm to 2 feet. .MONDAY...South winds 5 to 15 knots becoming southeast 10 to 20 knots by mid afternoon. Waves building to 1 to 3 feet. .MONDAY NIGHT...South winds 15 to 25 knots becoming north 20 to 30 knots after midnight. Rain showers. Snow showers after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .TUESDAY...North winds to 30 knots diminishing to 15 to 25 knots. A chance of rain and snow showers. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet. .WEDNESDAY...Northeast winds 10 to 20 knots becoming south 5 to 15 knots. Waves subsiding to calm to 2 feet. $$ LSZ264-201545- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 341 AM EDT Sat Apr 20 2024 .EARLY THIS MORNING...Northwest winds 15 to 25 knots. Waves 4 to 7 feet occasionally to 9 feet. .TODAY...Northwest winds 15 to 25 knots backing west in the afternoon, then increasing to 20 to 30 knots late. Waves subsiding to 3 to 6 feet occasionally to 8 feet, then building to 4 to 7 feet occasionally to 9 feet. .TONIGHT...West winds 15 to 25 knots diminishing to 10 to 20 knots after midnight, then increasing to 15 to 25 knots late. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .SUNDAY...Northwest winds 15 to 25 knots becoming north 10 to 20 knots in the afternoon, then veering northeast late. Waves subsiding to 1 to 3 feet. .SUNDAY NIGHT...East winds 5 to 15 knots veering south after midnight. Waves subsiding to calm to 2 feet. .MONDAY...South winds 5 to 15 knots backing southeast by mid afternoon. Waves building to 1 to 3 feet. .MONDAY NIGHT...Southeast winds 15 to 25 knots becoming northeast gales to 35 knots after midnight. Rain showers likely. Snow showers likely after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .TUESDAY...North gales to 35 knots diminishing to 15 to 25 knots. A chance of rain and snow showers. Waves 3 to 5 feet occasionally to 7 feet. .WEDNESDAY...North winds 10 to 20 knots becoming southwest 5 to 15 knots. Waves subsiding to calm to 2 feet. $$ LSZ265-201545- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 341 AM EDT Sat Apr 20 2024 .EARLY THIS MORNING...West winds 20 to 30 knots. Isolated snow showers. Waves 3 to 6 feet occasionally to 8 feet. .TODAY...Northwest winds 20 to 30 knots backing west in the afternoon, then diminishing to 15 to 25 knots late. Waves subsiding to 2 to 4 feet. .TONIGHT...West winds 15 to 25 knots increasing to 20 to 30 knots late. Waves 2 to 4 feet. .SUNDAY...West winds 20 to 30 knots becoming northwest 15 to 25 knots in the afternoon, then becoming north 10 to 20 knots late. Waves subsiding to 1 to 3 feet. .SUNDAY NIGHT...East winds 5 to 15 knots veering south after midnight. Waves subsiding to calm to 2 feet. .MONDAY...South winds 10 to 20 knots backing southeast by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...South winds 10 to 20 knots increasing to 20 to 30 knots after midnight. Rain showers. Waves building to 2 to 4 feet. .TUESDAY...North gales to 35 knots diminishing to 20 to 30 knots. A chance of rain and snow showers. Waves building to 3 to 5 feet occasionally to 7 feet. .WEDNESDAY...North winds 15 to 25 knots becoming southwest 10 to 20 knots. Waves subsiding to calm to 2 feet. $$ LSZ266-201545- 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- 341 AM EDT Sat Apr 20 2024 .EARLY THIS MORNING...Northwest winds 20 to 30 knots. Isolated snow showers. Waves 5 to 9 feet occasionally to 11 feet. .TODAY...Northwest winds 20 to 30 knots becoming west 15 to 25 knots late. Isolated snow showers through early afternoon. Waves subsiding to 4 to 7 feet occasionally to 9 feet. .TONIGHT...West winds 15 to 25 knots. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .SUNDAY...West winds 20 to 30 knots veering northwest in the afternoon, then becoming north 15 to 25 knots late. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet occasionally to 7 feet. .SUNDAY NIGHT...North winds 5 to 15 knots veering south after midnight. Waves subsiding to calm to 2 feet. .MONDAY...South winds 10 to 20 knots backing southeast by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...South winds 15 to 25 knots increasing to gales to 35 knots after midnight. A chance of rain showers through midnight, then rain showers after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .TUESDAY...North gales to 35 knots diminishing to 20 to 30 knots. A chance of rain and snow showers. Waves building to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY...North winds 15 to 25 knots becoming northwest 10 to 20 knots. Waves subsiding to calm to 2 feet. $$ LSZ267-201545- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 341 AM EDT Sat Apr 20 2024 .EARLY THIS MORNING...West winds 20 to 30 knots. Isolated snow showers. Waves 6 to 10 feet occasionally to 13 feet. .TODAY...Northwest winds 20 to 30 knots backing west late. Isolated snow showers. Waves subsiding to 5 to 8 feet occasionally to 10 feet, then building to 6 to 9 feet occasionally to 11 feet. .TONIGHT...West winds 20 to 30 knots. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .SUNDAY...West winds 20 to 30 knots becoming northwest to 30 knots with a few gale force gusts to 35 knots possible in the afternoon, then diminishing to 20 to 30 knots late. Waves building to 4 to 7 feet occasionally to 9 feet. .SUNDAY NIGHT...North winds 10 to 20 knots veering south after midnight. Waves subsiding to calm to 2 feet. .MONDAY...South winds 10 to 20 knots. Waves calm to 2 feet. .MONDAY NIGHT...South winds 15 to 25 knots increasing to 20 to 30 knots after midnight. A chance of rain showers through midnight, then rain showers likely after midnight. Waves building to 2 to 4 feet. .TUESDAY...North winds 20 to 30 knots. A chance of rain and snow showers. Waves building to 3 to 5 feet occasionally to 7 feet. .WEDNESDAY...North winds 20 to 30 knots diminishing to 15 to 25 knots. Waves subsiding to calm to 2 feet. $$ LSZ261-201545- MAFOR 2009/ Superior West 12730 12630 11530 13620. Waves 3 to 6 feet today. Waves 3 to 5 feet subsiding to 2 to 4 feet tonight. Superior North Central 13730 13640 12630. Waves 4 to 7 feet subsiding to 3 to 6 feet today. Waves 4 to 7 feet tonight. Superior South Central 11640 11740 11730 14630 11630. Waves 4 to 7 feet subsiding to 3 to 6 feet today. Waves 3 to 5 feet subsiding to 2 to 4 feet tonight. Superior East 14740 11640 13630. Waves 6 to 10 feet today. Waves 5 to 8 feet tonight. $$ 07 Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes