FZUS63 KMQT 280803 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 403 AM EDT Mon Sep 28 2020 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 will swing through Lake Superior this morning. A weak ridge of 29.8 inches then briefly moves over western Lake Superior by Monday evening while a 29.5 inch low moves north through Lake Huron and the St. Marys River. This low will deepen to 29.1 inches south of James Bay by Tuesday morning. Tuesday evening, a 29.6 inch trough will drop south from Canada. A 29.4 inch low pressure system develops within this trough, north of Lake Superior on Wednesday before lifting away to the northeast. LSZ162-281615- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 403 AM EDT Mon Sep 28 2020 /303 AM CDT Mon Sep 28 2020/ .EARLY THIS MORNING...Northwest winds 10 to 20 knots. A slight chance of showers. Waves 1 to 3 feet. .TODAY...Northwest winds 10 to 20 knots. A slight chance of showers. Waves subsiding to calm to 2 feet. .TONIGHT...Northwest winds 10 to 20 knots backing west after midnight. A slight chance of showers. Waves building to 1 to 3 feet. .TUESDAY...West winds 10 to 20 knots increasing to 15 to 25 knots in the afternoon. A chance of showers. Waves building to 2 to 4 feet. .TUESDAY NIGHT...West winds 10 to 20 knots. A chance of showers. Waves subsiding to 1 to 3 feet. .WEDNESDAY...Northwest 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. .WEDNESDAY NIGHT...Northwest winds 15 to 25 knots veering north after midnight. A chance of showers. Waves subsiding to 1 to 3 feet. .THURSDAY...North winds 15 to 25 knots diminishing to 10 to 20 knots. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .FRIDAY...North winds 5 to 15 knots backing northwest. Waves subsiding to calm to 2 feet. $$ LSZ263-281615- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 403 AM EDT Mon Sep 28 2020 .EARLY THIS MORNING...Northwest winds 10 to 20 knots. A slight chance of showers. Waves 2 to 4 feet. .TODAY...Northwest winds 10 to 20 knots. A slight chance of showers. Waves subsiding to calm to 2 feet. .TONIGHT...Northwest winds 10 to 20 knots backing west after midnight. A chance of showers. Waves building to 2 to 4 feet. .TUESDAY...West winds 15 to 25 knots. Showers likely. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .TUESDAY NIGHT...West winds 10 to 20 knots veering northwest after midnight. Showers likely. Waves subsiding to 1 to 3 feet. .WEDNESDAY...Northwest winds 15 to 25 knots. Showers likely. Waves building to 2 to 4 feet. .WEDNESDAY NIGHT...Northwest winds 15 to 25 knots veering north after midnight. Showers likely through midnight, then a chance of showers after midnight. Waves 2 to 4 feet. .THURSDAY...North winds 15 to 25 knots diminishing to 10 to 20 knots. A chance of rain showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .FRIDAY...North winds 5 to 15 knots backing northwest. Waves subsiding to calm to 2 feet. $$ LSZ264-281615- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 403 AM EDT Mon Sep 28 2020 .EARLY THIS MORNING...Northwest winds 5 to 15 knots. A slight chance of showers. Waves 2 to 4 feet subsiding to 1 to 3 feet. .TODAY...Northwest winds 5 to 15 knots. A slight chance of showers. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .TONIGHT...Northwest winds 5 to 15 knots increasing to 10 to 20 knots after midnight. A chance of showers. Waves building to 2 to 4 feet. .TUESDAY...Northwest winds 10 to 20 knots backing west in the afternoon, then increasing to 15 to 25 knots late. Showers likely. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. .TUESDAY NIGHT...West winds 10 to 20 knots becoming northwest 5 to 15 knots after midnight. Showers likely. Waves subsiding to 1 to 3 feet. .WEDNESDAY...Northwest winds 10 to 20 knots. A chance of showers. Waves 1 to 3 feet. .WEDNESDAY NIGHT...North winds 10 to 20 knots increasing to 15 to 25 knots after midnight. A chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet. .THURSDAY...North winds 15 to 25 knots. A chance of rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...North winds 5 to 15 knots. Waves subsiding to calm to 2 feet. $$ LSZ265-281615- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 403 AM EDT Mon Sep 28 2020 .EARLY THIS MORNING...West winds 10 to 20 knots. A slight chance of showers. Waves calm to 2 feet building to 1 to 3 feet. .TODAY...Northwest winds 10 to 20 knots. A chance of showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .TONIGHT...Northwest winds 15 to 25 knots backing west after midnight. A chance of showers. Waves building to 2 to 4 feet. .TUESDAY...West winds 15 to 25 knots. A chance of showers through early afternoon, then showers by mid afternoon. Waves subsiding to 1 to 3 feet. .TUESDAY NIGHT...West winds 10 to 20 knots. Showers. Waves subsiding to calm to 2 feet. .WEDNESDAY...Northwest winds 15 to 25 knots. Showers likely through early afternoon, then a chance of showers by mid afternoon. Waves building to 1 to 3 feet. .WEDNESDAY NIGHT...Northwest winds 10 to 20 knots becoming north 15 to 25 knots after midnight. Showers likely. Waves building to 3 to 5 feet occasionally to 7 feet. .THURSDAY...North winds 20 to 30 knots diminishing to 10 to 20 knots. A chance of rain showers. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .FRIDAY...North winds 10 to 20 knots becoming northwest 5 to 15 knots. Waves subsiding to calm to 2 feet. $$ LSZ266-281615- 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- 403 AM EDT Mon Sep 28 2020 .EARLY THIS MORNING...West winds 10 to 20 knots. Waves 1 to 3 feet. .TODAY...Northwest winds 10 to 20 knots. A chance of showers. Waves 1 to 3 feet. .TONIGHT...Northwest winds 15 to 25 knots backing west late. A chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet. .TUESDAY...Northwest winds 15 to 25 knots backing west in the afternoon. A chance of showers through early afternoon, then showers by mid afternoon. Waves subsiding to 2 to 4 feet. .TUESDAY NIGHT...West winds 10 to 20 knots. Showers. Waves subsiding to 1 to 3 feet. .WEDNESDAY...Northwest winds 15 to 25 knots. Showers likely through early afternoon, then a chance of showers by mid afternoon. Waves building to 2 to 4 feet. .WEDNESDAY NIGHT...Northwest winds 15 to 25 knots veering north after midnight. Showers likely through midnight, then a chance of showers after midnight. Waves building to 3 to 6 feet occasionally to 8 feet. .THURSDAY...North winds 15 to 25 knots. A chance of rain showers. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .FRIDAY...North winds 10 to 20 knots diminishing to 5 to 15 knots. Waves subsiding to calm to 2 feet. $$ LSZ267-281615- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 403 AM EDT Mon Sep 28 2020 .EARLY THIS MORNING...Southwest winds 5 to 15 knots. Waves calm to 2 feet. .TODAY...Northwest winds 5 to 15 knots increasing to 10 to 20 knots late. A chance of showers. Waves calm to 2 feet. .TONIGHT...Northwest winds 15 to 25 knots becoming west 20 to 30 knots after midnight. A chance of showers through midnight, then showers likely after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .TUESDAY...West winds 20 to 30 knots diminishing to 10 to 20 knots. Showers. Waves subsiding to 2 to 4 feet. .TUESDAY NIGHT...West winds 10 to 20 knots. Showers. Waves subsiding to 1 to 3 feet. .WEDNESDAY...West winds 15 to 25 knots veering northwest by mid afternoon. Showers likely through early afternoon, then a chance of showers by mid afternoon. Waves building to 2 to 4 feet. .WEDNESDAY NIGHT...Northwest winds 15 to 25 knots veering north after midnight. Showers likely through midnight, then a chance of showers after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .THURSDAY...North winds 15 to 25 knots. A chance of rain showers. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet occasionally to 7 feet. .FRIDAY...North winds 10 to 20 knots. Waves subsiding to calm to 2 feet. $$ LSZ261-281615- MAFOR 2809/ Superior West 15720 12620. Waves 1 to 3 feet. Superior North Central 15710 12720. A chance of showers overnight. Waves 2 to 4 feet today. Waves 1 to 3 feet tonight. Superior South Central 13710 13720 12730. A chance of showers this afternoon and tonight. Waves 1 to 3 feet today. Waves 2 to 4 feet tonight. Superior East 11610 12700 12710 11720 11730 11736. Waves 1 to 3 feet today. Waves 1 to 3 feet building to 2 to 4 feet tonight. $$ Voss Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes