####018011549#### FZUS63 KMQT 202014 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 414 PM 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 30.4 inch high pressure over the north-central Plains extends 30.1 inch ridging across Lake Superior on Sunday before shifting over the Lower Great Lakes on Monday. Meanwhile, 29.7 inch troughing over Alberta on Sunday tracks east-southeast across the Canadian Prairies on Monday. By Monday night, a 29.5 inch low pressure is expected to track near or across Lake Superior before shifting east of the Great Lakes on Tuesday. A 30.3 inch high pressure over northern Ontario quickly shifts south across Lake Superior Tuesday night and Wednesday. Ridging shifts east of the area Wednesday night and Thursday as a 29.4 inch low pressure develops on the north-central Plains. LSZ162-210415- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 414 PM EDT Sat Apr 20 2024 /314 PM CDT Sat Apr 20 2024/ .LATE THIS AFTERNOON...West winds 15 to 25 knots. Waves 2 to 4 feet. .TONIGHT...West winds 10 to 20 knots. Waves subsiding to calm to 2 feet, then building to 2 to 4 feet. .SUNDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots in the afternoon, then backing southwest late. Waves subsiding to calm to 2 feet. .SUNDAY NIGHT...Southwest winds 5 to 15 knots backing south after midnight, then veering southwest late. Waves calm to 2 feet. .MONDAY...Southwest winds 5 to 15 knots becoming south 10 to 20 knots by mid afternoon. A slight chance of rain showers by mid afternoon. Waves building to 1 to 3 feet. .MONDAY NIGHT...Southwest winds 10 to 20 knots veering west after midnight. Rain showers through midnight, then a chance of rain showers after midnight. Waves 1 to 3 feet. .TUESDAY...Northeast winds 20 to 30 knots. Rain showers, possibly mixed with snow through early afternoon, then a chance of rain and snow showers by mid afternoon. Waves building to 3 to 6 feet occasionally to 8 feet. .TUESDAY NIGHT...Northeast winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet. .WEDNESDAY...East winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .THURSDAY...East winds 10 to 20 knots increasing to 15 to 25 knots. A chance of rain showers. Waves building to 1 to 3 feet. $$ LSZ263-210415- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 414 PM EDT Sat Apr 20 2024 .LATE THIS AFTERNOON...West winds 20 to 30 knots. Waves 3 to 6 feet occasionally to 8 feet. .TONIGHT...West winds 15 to 25 knots diminishing to 10 to 20 knots after midnight, then increasing to 15 to 25 knots late. Waves subsiding to 2 to 4 feet. .SUNDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots in the afternoon, then backing southwest late. Waves subsiding to calm to 2 feet. .SUNDAY NIGHT...Southwest winds 5 to 15 knots backing south after midnight. Waves calm to 2 feet. .MONDAY...Southwest winds 5 to 15 knots backing south by mid afternoon. Waves building to 1 to 3 feet. .MONDAY NIGHT...Southwest winds 10 to 20 knots increasing to 20 to 30 knots after midnight. Rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. .TUESDAY...North gales to 35 knots veering northeast by mid afternoon. A chance of rain and snow showers. Waves building to 5 to 9 feet occasionally to 11 feet. .TUESDAY NIGHT...Northeast winds 20 to 30 knots with a few gale force gusts to 35 knots possible early then diminishing to 15 to 25 knots after midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .WEDNESDAY...Northeast winds 10 to 20 knots becoming south 5 to 15 knots. Waves subsiding to calm to 2 feet. .THURSDAY...South winds 5 to 15 knots becoming southeast 10 to 20 knots. Waves building to 1 to 3 feet. $$ LSZ264-210415- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 414 PM EDT Sat Apr 20 2024 .LATE THIS AFTERNOON...West winds 20 to 30 knots. Waves 3 to 6 feet occasionally to 8 feet 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. Waves subsiding to 2 to 4 feet. .SUNDAY...Northwest winds 10 to 20 knots veering north in the afternoon, then becoming southeast 5 to 15 knots late. Waves subsiding to 1 to 3 feet. .SUNDAY NIGHT...Southeast winds 5 to 15 knots veering south after midnight. Waves subsiding to calm to 2 feet. .MONDAY...Southwest winds 5 to 15 knots backing south by mid afternoon. Waves building to 1 to 3 feet. .MONDAY NIGHT...South winds 10 to 20 knots becoming north 20 to 30 knots after midnight. Rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. .TUESDAY...North gales to 35 knots. A chance of rain and snow showers. Waves building to 6 to 10 feet occasionally to 13 feet. .TUESDAY NIGHT...North winds 20 to 30 knots with a few gale force gusts to 35 knots possible early then becoming northeast 15 to 25 knots after midnight. Waves subsiding to 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. .THURSDAY...South winds 5 to 15 knots. Waves building to 2 to 4 feet. $$ LSZ265-210415- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 414 PM EDT Sat Apr 20 2024 .LATE THIS AFTERNOON...West winds 15 to 25 knots. Waves 3 to 5 feet occasionally to 7 feet subsiding to 2 to 4 feet. .TONIGHT...West winds 15 to 25 knots. Waves subsiding to 1 to 3 feet. .SUNDAY...Northwest winds 15 to 25 knots veering north in the afternoon, then diminishing to 10 to 20 knots late. Waves 1 to 3 feet. .SUNDAY NIGHT...Southeast winds 10 to 20 knots diminishing to 5 to 15 knots after midnight, then veering south late. Waves subsiding to calm to 2 feet. .MONDAY...South winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...South winds 10 to 20 knots veering southwest after midnight. Rain showers. Waves building to 1 to 3 feet. .TUESDAY...North winds 20 to 30 knots increasing to gales to 35 knots by mid afternoon. A chance of rain and snow showers. Waves building to 6 to 10 feet occasionally to 13 feet. .TUESDAY NIGHT...North winds 20 to 30 knots with a few gale force gusts to 35 knots possible early. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY...North winds 15 to 25 knots becoming south 10 to 20 knots. Waves subsiding to calm to 2 feet. .THURSDAY...Southeast winds 10 to 20 knots veering south. Waves building to 1 to 3 feet. $$ LSZ266-210415- 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- 414 PM EDT Sat Apr 20 2024 .LATE THIS AFTERNOON...West winds 15 to 25 knots. Waves 4 to 8 feet occasionally to 10 feet. .TONIGHT...West winds 15 to 25 knots increasing to 20 to 30 knots late. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .SUNDAY...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots in the afternoon, then becoming north 10 to 20 knots late. Waves building to 3 to 6 feet occasionally to 8 feet. .SUNDAY NIGHT...East winds 5 to 15 knots veering south after midnight, then increasing to 10 to 20 knots late. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .MONDAY...South winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .MONDAY NIGHT...South winds 10 to 20 knots increasing to 20 to 30 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. Rain showers likely through early afternoon. A chance of snow showers. A chance of rain showers by mid afternoon. Waves building to 7 to 10 feet occasionally to 13 feet. .TUESDAY NIGHT...Northeast winds 20 to 30 knots with a few gale force gusts to 35 knots possible early then diminishing to 20 to 30 knots after midnight. Waves subsiding 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. .THURSDAY...South winds 10 to 20 knots. Waves building to 2 to 4 feet. $$ LSZ267-210415- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 414 PM EDT Sat Apr 20 2024 .LATE THIS AFTERNOON...West winds 20 to 30 knots. Waves 5 to 8 feet occasionally to 10 feet. .TONIGHT...West winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .SUNDAY...West winds 20 to 30 knots veering northwest in the afternoon, then diminishing to 15 to 25 knots late. Waves building to 4 to 7 feet occasionally to 9 feet. .SUNDAY NIGHT...Northwest winds 10 to 20 knots diminishing to 5 to 15 knots after midnight, then becoming south 10 to 20 knots late. Waves subsiding to calm to 2 feet. .MONDAY...South winds 10 to 20 knots. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .MONDAY NIGHT...South winds 15 to 25 knots. A chance of rain showers through midnight, then rain showers after midnight. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .TUESDAY...West winds 20 to 30 knots becoming north gales to 35 knots by mid afternoon. Rain showers likely through early afternoon, then a chance of rain and snow showers by mid afternoon. Waves building to 5 to 8 feet occasionally to 10 feet. .TUESDAY NIGHT...North winds 20 to 30 knots with a few gale force gusts to 35 knots possible early then diminishing to 20 to 30 knots after midnight. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY...North winds 20 to 30 knots becoming northwest 10 to 20 knots. Waves subsiding to calm to 2 feet. .THURSDAY...South winds 10 to 20 knots. Waves building to 1 to 3 feet. $$ LSZ261-210415- MAFOR 2021/ Superior West 11530 11620 11610 11620 12630 11620 11610. Waves 3 to 5 feet subsiding to 2 to 4 feet tonight. Waves 2 to 4 feet subsiding to 1 to 3 feet Sunday. Superior North Central 11640 11630 11620 12630 11730 11830 11820. Waves 3 to 6 feet building to 4 to 7 feet, then subsiding to 3 to 6 feet tonight. Waves 2 to 4 feet Sunday. Superior South Central 15630 11720 11820. Waves 3 to 6 feet subsiding to 2 to 4 feet tonight. Waves 2 to 4 feet Sunday. Superior East 11640 14630 13730. Waves 5 to 8 feet tonight. Waves 3 to 6 feet Sunday. $$ EK Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes