####018013562#### FZUS63 KMQT 251951 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 351 PM EDT Thu Apr 25 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... Broad high pressure of 30.3 inches is centered northeast of the Great Lakes region this afternoon. By evening, the 30.4 ridging extends across central and southern Quebec back into the Great Lakes region. During tonight and Friday, the ridge, at 30.5 inches, shifts to New England and the Maritime Provinces while low pressure of 29.2 inches lifts from eastern Colorado into Nebraska. This low continues to track northeast, weakening to 29.6 inches by the time it reaches northeast Lake Superior on Saturday evening. On Sunday, 30.4 inch high pressure builds over far northern Ontario as a 29.6 inch low pressure lifts northeast across the Central Plains. This low continues to track northeast, crossing Lake Superior Monday. In its wake, a 30.0 inch ridge shifts east across the Mississippi Valley Monday night into the Lower Great Lakes Tuesday. LSZ162-260400- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 351 PM EDT Thu Apr 25 2024 /251 PM CDT Thu Apr 25 2024/ .LATE THIS AFTERNOON...East winds 10 to 20 knots. Waves 2 to 4 feet building to 3 to 5 feet occasionally to 7 feet. .TONIGHT...East winds 10 to 20 knots becoming southeast 5 to 15 knots after midnight, then increasing to 10 to 20 knots late. Waves subsiding to 1 to 3 feet. .FRIDAY...East winds 10 to 20 knots increasing to 15 to 25 knots late. A chance of rain showers by mid afternoon. Waves building to 2 to 4 feet. .FRIDAY NIGHT...East winds 15 to 25 knots increasing to 20 to 30 knots after midnight, then backing northeast late. Rain showers and a slight chance of thunderstorms. Waves building to 3 to 6 feet occasionally to 8 feet. .SATURDAY...Northeast winds 15 to 25 knots becoming north 10 to 20 knots by mid afternoon. Rain showers and a slight chance of thunderstorms. Waves subsiding to 2 to 4 feet. .SATURDAY NIGHT...North winds 10 to 20 knots becoming northeast 15 to 25 knots after midnight. A chance of rain showers. Waves subsiding to 1 to 3 feet, then building to 3 to 5 feet occasionally to 7 feet. .SUNDAY...Northeast gales to 40 knots. A chance of rain showers through early afternoon, then rain showers by mid afternoon. Waves building to 10 to 14 feet occasionally to 18 feet. .SUNDAY NIGHT...Northeast gales to 40 knots diminishing to 20 to 30 knots after midnight. Rain showers. Waves subsiding to 4 to 7 feet occasionally to 9 feet. .MONDAY...Northeast winds 15 to 25 knots becoming west 10 to 20 knots. Rain showers likely. Waves subsiding to 1 to 3 feet. .TUESDAY...Southwest winds 10 to 20 knots becoming west 15 to 25 knots. A chance of rain showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. $$ LSZ263-260400- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 351 PM EDT Thu Apr 25 2024 .LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to 2 feet. .TONIGHT...Southeast winds 5 to 15 knots becoming south 10 to 20 knots after midnight. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .FRIDAY...Southeast winds 10 to 20 knots increasing to 20 to 30 knots. A slight chance of rain showers by mid afternoon. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY NIGHT...Southeast winds 15 to 25 knots backing east after midnight. A chance of rain showers through midnight, then rain showers likely and a slight chance of thunderstorms after midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet, then building to 4 to 7 feet occasionally to 9 feet. .SATURDAY...East winds 10 to 20 knots backing north by mid afternoon. Rain showers and a slight chance of thunderstorms. Waves subsiding to 2 to 4 feet. .SATURDAY NIGHT...North winds 20 to 30 knots. A chance of rain showers. Waves building to 4 to 7 feet occasionally to 9 feet. .SUNDAY...Northeast gales to 35 knots. A chance of rain showers through early afternoon, then rain showers likely by mid afternoon. Waves building to 7 to 10 feet occasionally to 13 feet. .SUNDAY NIGHT...East gales to 35 knots diminishing to 20 to 30 knots after midnight. Rain showers. Waves subsiding to 5 to 8 feet occasionally to 10 feet. .MONDAY...West winds 20 to 30 knots diminishing to 15 to 25 knots. Rain showers likely. Waves subsiding to 2 to 4 feet. .TUESDAY...Southwest winds 5 to 15 knots becoming west 10 to 20 knots. A chance of rain showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. $$ LSZ264-260400- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 351 PM EDT Thu Apr 25 2024 .LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Waves calm to 2 feet building to 1 to 3 feet. .TONIGHT...Southeast winds 10 to 20 knots veering south after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .FRIDAY...Southeast winds 15 to 25 knots increasing to 20 to 30 knots in the afternoon. Waves subsiding to 2 to 4 feet, then building to 4 to 7 feet occasionally to 9 feet. .FRIDAY NIGHT...Southeast winds 15 to 25 knots increasing to 20 to 30 knots after midnight. A chance of rain showers through midnight, then rain showers after midnight. Waves subsiding to 3 to 6 feet occasionally to 8 feet, then building to 5 to 8 feet occasionally to 10 feet. .SATURDAY...Southeast winds 15 to 25 knots becoming north 10 to 20 knots by mid afternoon. Rain showers and a slight chance of thunderstorms. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .SATURDAY NIGHT...North winds 20 to 30 knots. A chance of rain showers through midnight. Waves building to 4 to 7 feet occasionally to 9 feet. .SUNDAY...Northeast winds 20 to 30 knots. Rain showers likely by mid afternoon. Waves 4 to 7 feet occasionally to 9 feet. .SUNDAY NIGHT...East winds 20 to 30 knots. Rain showers. Waves building to 5 to 8 feet occasionally to 10 feet. .MONDAY...Southwest winds 20 to 30 knots becoming west 15 to 25 knots. Rain showers likely. Waves subsiding to 2 to 4 feet. .TUESDAY...West winds 10 to 20 knots backing southwest. A chance of rain showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. $$ LSZ265-260400- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 351 PM EDT Thu Apr 25 2024 .LATE THIS AFTERNOON...East winds 10 to 20 knots. Waves calm to 2 feet building to 1 to 3 feet. .TONIGHT...Southeast winds 10 to 20 knots veering south after midnight. Waves building to 2 to 4 feet. .FRIDAY...Southeast winds 10 to 20 knots increasing to 20 to 30 knots. Waves subsiding to 1 to 3 feet, then building to 3 to 6 feet occasionally to 8 feet. .FRIDAY NIGHT...Southeast winds 20 to 30 knots. Rain showers likely. A slight chance of thunderstorms after midnight. Waves subsiding to 2 to 4 feet, then building to 3 to 6 feet occasionally to 8 feet. .SATURDAY...Southeast winds 10 to 20 knots veering south by mid afternoon. Rain showers and a slight chance of thunderstorms. Waves subsiding to 1 to 3 feet. .SATURDAY NIGHT...Northwest winds 10 to 20 knots becoming north 15 to 25 knots after midnight. A chance of rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. .SUNDAY...Northeast winds 15 to 25 knots. A chance of rain showers through early afternoon, then rain showers likely by mid afternoon. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .SUNDAY NIGHT...East winds 20 to 30 knots. Rain showers. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .MONDAY...Southeast winds 15 to 25 knots veering west. Rain showers likely. Waves subsiding to calm to 2 feet. .TUESDAY...West winds 10 to 20 knots becoming southwest 15 to 25 knots. A chance of rain showers. Waves calm to 2 feet. $$ LSZ266-260400- 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- 351 PM EDT Thu Apr 25 2024 .LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves calm to 2 feet building to 1 to 3 feet. .TONIGHT...Southeast winds 10 to 20 knots veering south after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .FRIDAY...South winds 15 to 25 knots backing southeast in the afternoon, then increasing to 20 to 30 knots late. Waves subsiding to 2 to 4 feet, then building to 4 to 7 feet occasionally to 9 feet. .FRIDAY NIGHT...Southeast winds to 30 knots with a few gale force gusts to 35 knots possible diminishing to 20 to 30 knots after midnight. A chance of rain showers through midnight, then rain showers likely after midnight. Waves building to 4 to 8 feet occasionally to 10 feet. .SATURDAY...Southeast winds 20 to 30 knots becoming south 10 to 20 knots by mid afternoon. Rain showers and a slight chance of thunderstorms. Waves building to 5 to 8 feet occasionally to 10 feet, then subsiding to 2 to 4 feet. .SATURDAY NIGHT...West winds 15 to 25 knots veering north after midnight. A chance of showers and thunderstorms. Waves building to 3 to 6 feet occasionally to 8 feet. .SUNDAY...Northeast winds 20 to 30 knots diminishing to 15 to 25 knots by mid afternoon. A chance of rain showers through early afternoon, then rain showers likely by mid afternoon. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet occasionally to 7 feet. .SUNDAY NIGHT...East winds 20 to 30 knots. Rain showers. Waves building to 4 to 7 feet occasionally to 9 feet. .MONDAY...South winds 20 to 30 knots becoming west 15 to 25 knots. Rain showers likely. A chance of rain showers. Waves subsiding to 2 to 4 feet. .TUESDAY...West winds 10 to 20 knots becoming southwest 15 to 25 knots. A chance of rain showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. $$ LSZ267-260400- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 351 PM EDT Thu Apr 25 2024 .LATE THIS AFTERNOON...East winds 10 to 20 knots. Waves calm to 2 feet. .TONIGHT...South winds 10 to 20 knots increasing to 15 to 25 knots after midnight. Waves building to 2 to 4 feet. .FRIDAY...Southeast winds 15 to 25 knots increasing to 30 knots with a few gale force gusts to 35 knots possible late. Waves building to 4 to 7 feet occasionally to 9 feet. .FRIDAY NIGHT...Southeast winds to 30 knots with a few gale force gusts to 35 knots possible diminishing to 20 to 30 knots after midnight, then increasing to 30 knots with a few gale force gusts to 35 knots possible late. A chance of rain showers through midnight, then rain showers after midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet, then building to 4 to 7 feet occasionally to 9 feet. .SATURDAY...Southeast winds to 30 knots with a few gale force gusts to 35 knots possible decreasing to south winds 15 to 25 knots by mid afternoon. Rain showers and a chance of thunderstorms. Waves building to 5 to 8 feet occasionally to 10 feet, then subsiding to 3 to 5 feet occasionally to 7 feet. .SATURDAY NIGHT...Southwest winds 15 to 25 knots becoming west 10 to 20 knots after midnight. Rain showers likely through midnight. A chance of thunderstorms. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. .SUNDAY...Northeast winds 10 to 20 knots increasing to 15 to 25 knots by mid afternoon. A chance of rain showers through early afternoon, then rain showers likely by mid afternoon. Waves building to 3 to 5 feet occasionally to 7 feet. .SUNDAY NIGHT...East winds 15 to 25 knots becoming southeast gales to 35 knots after midnight. Rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. .MONDAY...South winds 20 to 30 knots becoming west 15 to 25 knots. Rain showers, then a chance of rain showers. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. .TUESDAY...West winds 10 to 20 knots backing south. A chance of rain showers. Waves subsiding to calm to 2 feet. $$ LSZ261-260400- MAFOR 2521/ Superior West 12210 11320 11420 12320 11210 11220. Waves 1 to 3 feet. Superior North Central 13320 12420 11330 12340. Waves 1 to 3 feet building to 2 to 4 feet tonight then building to 3 to 6 feet Friday. Superior South Central 12320 13420 12330 11340. Waves 2 to 4 feet tonight building to 3 to 5 feet Friday. Superior East 11210 11310 12420 11320 12330 11340. Waves 1 to 3 feet tonight. Waves 2 to 4 feet building to 3 to 5 feet Friday. $$ BW Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes