Great Lakes Forecast
Issued by NWS
Issued by NWS
662 FZUS63 KMQT 052005 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 405 PM EDT Wed Jun 5 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...The cold front associated with a 29.2 inch low approaching Lake Winnipeg will support troughing of 29.4 inches across Lake Superior into early this evening before the parent low pressure spins into northern Ontario Thursday morning. The troughing over Lake Superior weakens to 29.6 inches Friday as the low fills to 29.4 inches over southern James Bay. Weak troughing at 29.7 inches remains in place over Lake Superior Saturday before weak ridging near 29.8 inches develops over Lake Superior on Sunday as a high pressure shifts into the Canadian Prairies. The ridge builds to 30.0 inches over Lake Superior Monday. LSZ162-060415- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 405 PM EDT Wed Jun 5 2024 /305 PM CDT Wed Jun 5 2024/ .LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. A chance of showers and a slight chance of thunderstorms. Waves 1 to 3 feet. .TONIGHT...Southwest winds 10 to 20 knots veering west late. A chance of rain showers and a slight chance of thunderstorms. Waves building to 2 to 4 feet. .THURSDAY...West winds 20 to 30 knots. A chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .THURSDAY NIGHT...West winds 15 to 25 knots. A slight chance of showers after midnight. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. .FRIDAY...West winds 15 to 25 knots. A slight chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .FRIDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet. .SATURDAY...West winds 15 to 25 knots. A chance of showers. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .SATURDAY NIGHT...West winds 15 to 25 knots veering northwest after midnight. A chance of showers. Waves subsiding to calm to 2 feet. .SUNDAY...Northwest winds 10 to 20 knots becoming north 5 to 15 knots. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .MONDAY...South winds 5 to 15 knots veering west. Waves calm to 2 feet. $$ LSZ263-060415- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 405 PM EDT Wed Jun 5 2024 .LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. A chance of showers and a slight chance of thunderstorms. Waves calm to 2 feet building to 1 to 3 feet. .TONIGHT...Southwest winds 5 to 15 knots increasing to 10 to 20 knots after midnight, then veering west late. A slight chance of showers and thunderstorms. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .THURSDAY...West winds 15 to 25 knots. A chance of showers. Waves building to 3 to 6 feet occasionally to 8 feet. .THURSDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to 20 knots after midnight, then increasing to 15 to 25 knots late. A slight chance of showers. Waves subsiding to 2 to 4 feet. .FRIDAY...West winds 15 to 25 knots. A slight chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet. .FRIDAY NIGHT...West winds 5 to 15 knots increasing to 10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet. .SATURDAY...West winds 10 to 20 knots. A chance of showers. Waves building to 2 to 4 feet. .SATURDAY NIGHT...West winds 10 to 20 knots veering northwest after midnight. A chance of showers. Waves subsiding to 1 to 3 feet. .SUNDAY...Northwest winds 10 to 20 knots becoming north 5 to 15 knots. Waves subsiding to calm to 2 feet. .MONDAY...North winds 5 to 15 knots backing southwest. Waves calm to 2 feet. $$ LSZ264-060415- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 405 PM EDT Wed Jun 5 2024 .LATE THIS AFTERNOON...South winds 5 to 15 knots. A slight chance of showers and thunderstorms. Waves 2 to 4 feet subsiding to 1 to 3 feet. .TONIGHT...South winds 5 to 15 knots veering west late. A slight chance of rain showers. Patchy fog after midnight. Waves building to 2 to 4 feet. .THURSDAY...West winds 15 to 25 knots. A chance of rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. .THURSDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to 20 knots after midnight, then increasing to 15 to 25 knots late. A chance of showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .FRIDAY...West winds 15 to 25 knots. A chance of showers. Waves 3 to 5 feet occasionally to 7 feet. .FRIDAY NIGHT...West winds 5 to 15 knots increasing to 10 to 20 knots after midnight. A chance of showers. Waves subsiding to 1 to 3 feet. .SATURDAY...West winds 10 to 20 knots. A chance of showers. Waves building to 2 to 4 feet. .SATURDAY NIGHT...Northwest winds 5 to 15 knots. A chance of showers. Waves subsiding to 1 to 3 feet. .SUNDAY...Northwest winds 10 to 20 knots becoming north 5 to 15 knots. Waves 1 to 3 feet. .MONDAY...North winds 5 to 15 knots backing southwest. Waves subsiding to calm to 2 feet. $$ LSZ265-060415- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 405 PM EDT Wed Jun 5 2024 .LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. A chance of showers and thunderstorms. Waves calm to 2 feet. .TONIGHT...South winds 10 to 20 knots veering west late. A chance of showers and a slight chance of thunderstorms. Waves building to 1 to 3 feet. .THURSDAY...West winds 10 to 20 knots increasing to 20 to 30 knots. A chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet. .THURSDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to 25 knots after midnight, then increasing to 20 to 30 knots late. A chance of showers. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet. .FRIDAY...West winds 20 to 30 knots. A chance of showers. Waves subsiding to 1 to 3 feet. .FRIDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. A chance of showers. Waves subsiding to calm to 2 feet. .SATURDAY...West winds 15 to 25 knots. A chance of showers. Waves calm to 2 feet. .SATURDAY NIGHT...Northwest winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. A chance of showers. Waves calm to 2 feet. .SUNDAY...Northwest winds 10 to 20 knots. Waves building to 1 to 3 feet. .MONDAY...North winds 10 to 20 knots becoming southwest 5 to 15 knots. Waves subsiding to calm to 2 feet. $$ LSZ266-060415- 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- 405 PM EDT Wed Jun 5 2024 .LATE THIS AFTERNOON...South winds 5 to 15 knots. Patchy fog. A slight chance of showers and thunderstorms. Waves 2 to 4 feet subsiding to 1 to 3 feet. .TONIGHT...South winds 10 to 20 knots veering southwest late. Patchy fog. A chance of rain showers and a slight chance of thunderstorms. Waves subsiding to calm to 2 feet, then building to 2 to 4 feet. .THURSDAY...West winds 10 to 20 knots increasing to 15 to 25 knots late. A chance of rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. .THURSDAY NIGHT...West winds 15 to 25 knots increasing to 20 to 30 knots late. A chance of showers. Waves building to 4 to 7 feet occasionally to 9 feet. .FRIDAY...West winds 20 to 30 knots diminishing to 15 to 25 knots by mid afternoon. A chance of showers. Waves 4 to 7 feet occasionally to 9 feet. .FRIDAY NIGHT...Northwest winds 15 to 25 knots backing west after midnight. A chance of showers. Waves subsiding to 2 to 4 feet. .SATURDAY...West winds 15 to 25 knots. A chance of showers. Waves 2 to 4 feet. .SATURDAY NIGHT...Northwest winds 10 to 20 knots. A chance of showers. Waves subsiding to 1 to 3 feet. .SUNDAY...Northwest winds 15 to 25 knots becoming north 10 to 20 knots. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .MONDAY...Northwest winds 10 to 20 knots becoming west 5 to 15 knots. Waves subsiding to calm to 2 feet. $$ LSZ267-060415- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 405 PM EDT Wed Jun 5 2024 .LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Patchy fog. A chance of showers. Waves 1 to 3 feet subsiding to calm to 2 feet. .TONIGHT...Southeast winds 5 to 15 knots becoming south 10 to 20 knots after midnight, then becoming southwest 5 to 15 knots late. Patchy fog. A chance of showers and thunderstorms. Waves calm to 2 feet. .THURSDAY...West winds 5 to 15 knots increasing to 10 to 20 knots in the afternoon. A chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet. .THURSDAY NIGHT...West winds 15 to 25 knots. A chance of showers. Waves building to 4 to 7 feet occasionally to 9 feet. .FRIDAY...West winds 20 to 30 knots diminishing to 15 to 25 knots by mid afternoon. A chance of showers. Waves building to 5 to 8 feet occasionally to 10 feet. .FRIDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. A chance of showers. Waves subsiding to 2 to 4 feet. .SATURDAY...West winds 10 to 20 knots increasing to 15 to 25 knots by mid afternoon. A chance of showers. Waves 2 to 4 feet. .SATURDAY NIGHT...West winds 10 to 20 knots veering northwest after midnight. A chance of showers. Waves subsiding to 1 to 3 feet. .SUNDAY...Northwest winds 10 to 20 knots veering north. Waves 1 to 3 feet. .MONDAY...Northwest winds 10 to 20 knots becoming southwest 5 to 15 knots. Waves subsiding to calm to 2 feet. $$ LSZ261-060415- MAFOR 0521/ Superior West 11520 11510 11520 12620 13630. A chance of showers early this evening and Thursday morning. Waves 2 to 5 feet. Superior North Central 12410 12510 12620 12630. A chance of showers Thursday afternoon. Waves 2 to 5 feet. Superior South Central 11310 11410 11400 11510 11610 12620 11630. A chance of showers this evening and Thursday afternoon. Waves 1 to 2 feet tonight building to 2 to 4 feet Thursday. Superior East 11500 11310 11410 11400 11500 13610. A chance of showers tonight. Waves 1 to 4 feet. $$ JSS Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes