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Great Lakes Forecast
Issued by NWS
Issued by NWS
697 FZUS63 KMQT 021349 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 949 AM EDT Tue Jul 2 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 29.4 inch low will continue to deepen as it shifts into northern Ontario today while a 30.2 inch high pressure moves off the coast of the Northeast US. An associated 29.7 inch trough will sweep across Lake Superior tonight and Wednesday morning as the low continues northeast over Hudson Bay. In its wake, a 29.9 inch high pressure ridge will shift east, reaching the western Great Lakes on Thursday. A 29.7 inch low pressure organizing over the Plains on Thursday will then track to the western Great Lakes region on Friday. The low continues northeast, reaching Quebec by Saturday evening. LSZ162-022200- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 949 AM EDT Tue Jul 2 2024 /849 AM CDT Tue Jul 2 2024/ .REST OF TODAY...South winds 15 to 25 knots diminishing to 10 to 20 knots late. Patchy fog by late morning. Scattered showers by late morning. Waves 1 to 3 feet building to 2 to 4 feet, then subsiding to 1 to 3 feet. .TONIGHT...South winds 10 to 20 knots veering southwest after midnight. A slight chance of showers and thunderstorms. Patchy dense fog after midnight. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .WEDNESDAY...Southwest winds 15 to 25 knots. Waves building to 2 to 4 feet. .WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet. .THURSDAY...Southwest winds 5 to 15 knots becoming east 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...East winds 5 to 15 knots backing northeast after midnight. A chance of showers. Waves calm to 2 feet. .FRIDAY...Northeast winds 10 to 20 knots becoming north 5 to 15 knots. A chance of showers. Waves calm to 2 feet. .SATURDAY...Southwest winds 5 to 15 knots increasing to 10 to 20 knots. A chance of showers. Waves calm to 2 feet. $$ LSZ263-022200- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 949 AM EDT Tue Jul 2 2024 .REST OF TODAY...South winds 15 to 25 knots diminishing to 10 to 20 knots late. Scattered showers by late morning. Patchy fog. Waves 2 to 4 feet. .TONIGHT...South winds 5 to 15 knots veering southwest after midnight. A chance of showers and a slight chance of thunderstorms. Patchy dense fog after midnight. Waves subsiding to 1 to 3 feet. .WEDNESDAY...West winds 10 to 20 knots becoming southwest 15 to 25 knots in the afternoon. Waves building to 3 to 5 feet occasionally to 7 feet. .WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet. .THURSDAY...West winds 5 to 15 knots backing south by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...East winds 5 to 15 knots. A chance of showers. Waves calm to 2 feet. .FRIDAY...Northeast winds 5 to 15 knots backing north. A chance of showers. Waves calm to 2 feet. .SATURDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet. $$ LSZ264-022200- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 949 AM EDT Tue Jul 2 2024 .REST OF TODAY...Southeast winds 15 to 25 knots veering south in the afternoon. Patchy fog. Numerous showers by late morning. Isolated showers by mid afternoon. Waves 3 to 5 feet occasionally to 7 feet building to 4 to 7 feet occasionally to 9 feet. .TONIGHT...South winds 15 to 25 knots diminishing to 10 to 20 knots after midnight, then becoming southwest 5 to 15 knots late. A chance of showers and a slight chance of thunderstorms. Areas of dense fog after midnight. Waves subsiding to 2 to 4 feet. .WEDNESDAY...Southwest winds 10 to 20 knots increasing to 15 to 25 knots in the afternoon. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. .WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet. .THURSDAY...West winds 5 to 15 knots backing south by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...Southeast winds less than 10 knots becoming east 5 to 15 knots after midnight. Waves calm to 2 feet. .FRIDAY...East winds 5 to 15 knots backing north. A chance of showers. Waves calm to 2 feet. .SATURDAY...West winds 5 to 15 knots backing southwest. Waves calm to 2 feet. $$ LSZ265-022200- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 949 AM EDT Tue Jul 2 2024 .REST OF TODAY...South winds 15 to 25 knots. Patchy fog. Showers by late morning. Scattered showers by mid afternoon. Waves 2 to 4 feet building to 3 to 5 feet occasionally to 7 feet. .TONIGHT...South winds 10 to 20 knots veering southwest late. A chance of showers. A slight chance of thunderstorms after midnight. Waves subsiding to calm to 2 feet. .WEDNESDAY...West winds 10 to 20 knots. Waves calm to 2 feet. .WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves calm to 2 feet. .THURSDAY...West winds 5 to 15 knots backing east by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...East winds 5 to 15 knots. A chance of showers. Waves calm to 2 feet. .FRIDAY...East winds 5 to 15 knots becoming north 10 to 20 knots. A chance of showers. Waves calm to 2 feet. .SATURDAY...Northwest winds 10 to 20 knots becoming southwest 5 to 15 knots. Waves calm to 2 feet. $$ LSZ266-022200- 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- 949 AM EDT Tue Jul 2 2024 .REST OF TODAY...South winds 20 to 30 knots. Numerous showers by late morning, then scattered showers by mid afternoon. Patchy fog by mid afternoon. Waves 3 to 5 feet occasionally to 7 feet building to 4 to 7 feet occasionally to 9 feet. .TONIGHT...South winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. A chance of showers. A slight chance of thunderstorms after midnight. Patchy dense fog after midnight. Waves subsiding to 1 to 3 feet. .WEDNESDAY...Southwest winds 10 to 20 knots becoming west 15 to 25 knots in the afternoon. Waves building to 2 to 4 feet. .WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet. .THURSDAY...Northwest winds 5 to 15 knots veering northeast by mid afternoon. Waves subsiding to calm to 2 feet. .THURSDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2 feet. .FRIDAY...East winds 5 to 15 knots becoming northeast 10 to 20 knots. A chance of showers. Waves calm to 2 feet. .SATURDAY...Northwest winds 10 to 20 knots becoming southwest 5 to 15 knots. Waves calm to 2 feet. $$ LSZ267-022200- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 949 AM EDT Tue Jul 2 2024 .REST OF TODAY...South winds 15 to 25 knots. Scattered showers by late morning. Numerous showers by mid afternoon. Waves 1 to 3 feet building to 3 to 5 feet occasionally to 7 feet. .TONIGHT...South winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. A chance of showers through midnight, then showers after midnight. Patchy fog after midnight. Waves subsiding to 1 to 3 feet. .WEDNESDAY...Southwest winds 10 to 20 knots veering west in the afternoon. A slight chance of showers. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves calm to 2 feet. .THURSDAY...West winds 5 to 15 knots veering northwest by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...Northeast winds 5 to 15 knots veering east after midnight. Waves calm to 2 feet. .FRIDAY...East winds 5 to 15 knots becoming northeast 10 to 20 knots. A chance of showers and thunderstorms. Waves calm to 2 feet. .SATURDAY...Northwest winds 10 to 20 knots backing south. Waves calm to 2 feet. $$ LSZ261-022200- MAFOR 0215/ Superior West 11420 11430 12420 11520 11514 11524 11520. Waves 2 to 3 feet. Superior North Central 11336 11330 12430 11420 11424 11514 11520. Waves 3 to 6 feet building to 4 to 7 feet this afternoon. Waves 4 to 7 feet subsiding to 3 to 6 feet tonight. Waves 2 to 4 feet Wednesday morning. Superior South Central 11436 11430 19436 13430 11420 11500 11510. Waves 2 to 4 feet building to 3 to 5 feet this afternoon. Waves 3 to 5 feet subsiding to 1 to 3 feet tonight. Waves 1 to 2 feet Wednesday morning. Superior East 11426 11336 11330 19336 11430 11420 11426 11416 19414 11510. Waves 2 to 4 feet building to 3 to 5 feet this afternoon. Waves 3 to 6 feet subsiding to 2 to 4 feet tonight. Waves 1 to 3 feet Wednesday morning. $$ LC Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes