FZUS63 KMQT 212001 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 401 PM EDT Thu Oct 21 2021 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 over Georgian Bay this evening will track east, reaching southern Quebec tonight, while a 30.3 inch high pressure over northern Manitoba extends a 30.1 inch ridge south into the Northern Plains. This high will then extend the ridge southeast toward the Upper Great Lakes Friday and Saturday. Sunday and Monday, the high pressure will build to 30.4 inches as it shifts over northern Ontario. The ridge weakens to 29.8 inches Tuesday as a 29.3 inch low pressure organizes over the Central Plains. && LSZ162-220415- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 401 PM EDT Thu Oct 21 2021 /301 PM CDT Thu Oct 21 2021/ .LATE THIS AFTERNOON...North winds 10 to 20 knots. Waves 1 to 3 feet subsiding to calm to 2 feet. .TONIGHT...North winds 10 to 20 knots. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .FRIDAY...North winds 10 to 20 knots diminishing to 5 to 15 knots in the afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...North winds 10 to 20 knots. Waves calm to 2 feet. .SATURDAY...North winds 5 to 15 knots backing northwest by mid afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...North winds 5 to 15 knots veering northeast after midnight. Waves calm to 2 feet. .SUNDAY...East winds 10 to 20 knots increasing to 15 to 25 knots by mid afternoon. Waves building to 3 to 5 feet occasionally to 7 feet. .SUNDAY NIGHT...East winds 15 to 25 knots. Waves 3 to 5 feet occasionally to 7 feet. .MONDAY...East winds 10 to 20 knots veering southeast. Waves subsiding to 2 to 4 feet. .TUESDAY...Southeast winds 10 to 20 knots. A chance of showers. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. $$ LSZ263-220415- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 401 PM EDT Thu Oct 21 2021 .LATE THIS AFTERNOON...North winds 10 to 20 knots. Waves 1 to 3 feet. .TONIGHT...North winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Isolated rain showers after midnight. Waves subsiding to calm to 2 feet. .FRIDAY...North winds 10 to 20 knots backing northwest late. Isolated rain showers. Waves calm to 2 feet. .FRIDAY NIGHT...North winds 10 to 20 knots. A slight chance of rain showers. Waves building to 1 to 3 feet. .SATURDAY...North winds 10 to 20 knots becoming northwest 5 to 15 knots by mid afternoon. Waves subsiding to calm to 2 feet. .SATURDAY NIGHT...North winds 5 to 15 knots. Waves calm to 2 feet. .SUNDAY...Northeast winds 10 to 20 knots veering east by mid afternoon. Waves building to 2 to 4 feet. .SUNDAY NIGHT...East winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .MONDAY...East winds 10 to 20 knots veering southeast. Waves subsiding to 2 to 4 feet. .TUESDAY...Southeast winds 10 to 20 knots. A chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet. $$ LSZ264-220415- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 401 PM EDT Thu Oct 21 2021 .LATE THIS AFTERNOON...North winds 15 to 25 knots. Isolated rain showers. Waves 3 to 6 feet occasionally to 8 feet. .TONIGHT...North winds 15 to 25 knots diminishing to 5 to 15 knots. Isolated rain showers. Waves subsiding to 1 to 3 feet. .FRIDAY...North winds 5 to 15 knots. Isolated rain showers. Waves 1 to 3 feet. .FRIDAY NIGHT...North winds 5 to 15 knots. A slight chance of rain showers. Waves building to 2 to 4 feet. .SATURDAY...North winds 5 to 15 knots becoming northwest 10 to 20 knots by mid afternoon. A chance of rain showers. Waves 2 to 4 feet. .SATURDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet. .SUNDAY...Northeast winds 5 to 15 knots veering east by mid afternoon. Waves 1 to 3 feet. .SUNDAY NIGHT...East winds 5 to 15 knots. Waves building to 3 to 5 feet occasionally to 7 feet. .MONDAY...East winds 5 to 15 knots. Waves subsiding to 2 to 4 feet. .TUESDAY...Southeast winds 5 to 15 knots increasing to 10 to 20 knots. A chance of showers. Waves building to 3 to 6 feet occasionally to 8 feet. $$ LSZ265-220415- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 401 PM EDT Thu Oct 21 2021 .LATE THIS AFTERNOON...North winds 20 to 30 knots. Isolated showers. Waves 3 to 6 feet occasionally to 8 feet. .TONIGHT...North winds 15 to 25 knots becoming northwest 10 to 20 knots late. Scattered rain showers. Waves subsiding to 2 to 4 feet. .FRIDAY...Northwest winds 10 to 20 knots increasing to 15 to 25 knots in the afternoon. Scattered rain showers. Waves subsiding to 1 to 3 feet. .FRIDAY NIGHT...North winds 10 to 20 knots. A chance of rain showers. Waves 1 to 3 feet. .SATURDAY...Northwest winds 10 to 20 knots. A chance of rain showers. Waves building to 2 to 4 feet. .SATURDAY NIGHT...Northwest winds 10 to 20 knots veering north after midnight. A chance of rain showers. Waves subsiding to 1 to 3 feet. .SUNDAY...Northeast winds 10 to 20 knots veering east by mid afternoon. Waves 1 to 3 feet. .SUNDAY NIGHT...East winds 10 to 20 knots. Waves building to 3 to 5 feet occasionally to 7 feet. .MONDAY...East winds 10 to 20 knots. Waves subsiding to 2 to 4 feet. .TUESDAY...Southeast winds 10 to 20 knots increasing to 15 to 25 knots. A chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet. $$ LSZ266-220415- 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- 401 PM EDT Thu Oct 21 2021 .LATE THIS AFTERNOON...North winds 20 to 30 knots. Isolated showers. Waves 4 to 7 feet occasionally to 9 feet. .TONIGHT...North winds 20 to 30 knots diminishing to 10 to 20 knots. Scattered rain showers. Waves subsiding to 2 to 4 feet. .FRIDAY...North winds 10 to 20 knots. Scattered rain showers. Waves subsiding to 1 to 3 feet. .FRIDAY NIGHT...North winds 10 to 20 knots. A chance of rain showers. Waves building to 2 to 4 feet. .SATURDAY...Northwest winds 10 to 20 knots increasing to 15 to 25 knots by mid afternoon. Rain showers likely. Waves 2 to 4 feet. .SATURDAY NIGHT...Northwest winds 15 to 25 knots becoming north 10 to 20 knots after midnight. Rain showers likely through midnight, then a chance of rain showers after midnight. Waves 2 to 4 feet. .SUNDAY...Northeast winds 10 to 20 knots veering east by mid afternoon. Waves subsiding to 1 to 3 feet. .SUNDAY NIGHT...East winds 10 to 20 knots. Waves building to 3 to 5 feet occasionally to 7 feet. .MONDAY...East winds 15 to 25 knots diminishing to 10 to 20 knots. Waves subsiding to 2 to 4 feet. .TUESDAY...Southeast winds 10 to 20 knots increasing to 15 to 25 knots. Waves building to 3 to 6 feet occasionally to 8 feet. $$ LSZ267-220415- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 401 PM EDT Thu Oct 21 2021 .LATE THIS AFTERNOON...North winds 20 to 30 knots. Waves 3 to 6 feet occasionally to 8 feet. .TONIGHT...North winds 20 to 30 knots diminishing to 10 to 20 knots. Isolated rain showers. Waves subsiding to 1 to 3 feet. .FRIDAY...North winds 10 to 20 knots. Scattered rain showers. Waves subsiding to calm to 2 feet. .FRIDAY NIGHT...North winds 10 to 20 knots. A chance of rain showers. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .SATURDAY...Northwest winds 10 to 20 knots. A chance of rain showers through early afternoon, then rain showers likely by mid afternoon. Waves building to 2 to 4 feet. .SATURDAY NIGHT...Northwest winds 10 to 20 knots veering north after midnight. Rain showers likely through midnight, then a chance of rain showers after midnight. Waves subsiding to 1 to 3 feet. .SUNDAY...Northeast winds 10 to 20 knots. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .SUNDAY NIGHT...East winds 10 to 20 knots. Waves building to 2 to 4 feet. .MONDAY...East winds 15 to 25 knots diminishing to 10 to 20 knots. Waves subsiding to 1 to 3 feet. .TUESDAY...East winds 10 to 20 knots veering southeast. Waves building to 2 to 4 feet. $$ LSZ261-220415- MAFOR 2121/ Superior West 11810 11820 14810 11810 11700. Waves 1 to 3 feet tonight and Friday. Superior North Central 12830 13820 11720 19726 11820 19826 11820. Waves 3 to 6 feet subsiding to 2 to 4 feet tonight and Friday. Superior South Central 11830 12830 19836 11820 19826 12720 19726 11726 11720 19726. Waves 3 to 6 feet tonight subsiding to 2 to 4 feet Friday. Superior East 11840 11830 11820 14810 19816 11810 19816. Waves 3 to 6 feet subsiding to 1 to 4 feet tonight and Friday. $$ JSS Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes