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Great Lakes Forecast
Issued by NWS
Issued by NWS
389 FZUS63 KMQT 141359 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 959 AM EDT Sun Jul 14 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 weak 29.8 inch trough moves across Lake Superior today, while a stronger trough of 29.6 inches sweeps across the lake on Monday. This will be followed by a high averaging 30.1 inches that expands from the Canadian Prairies to the upper Great Lakes Tuesday through the end of the week. LSZ162-142200- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 959 AM EDT Sun Jul 14 2024 /859 AM CDT Sun Jul 14 2024/ .REST OF TODAY...West winds 10 to 20 knots backing southwest in the afternoon. Waves calm to 2 feet building to 1 to 3 feet. .TONIGHT...West winds 5 to 15 knots veering northwest after midnight, then backing southwest late. Waves subsiding to calm to 2 feet. .MONDAY...South winds 5 to 15 knots becoming east 10 to 20 knots in the afternoon, then veering west late. A chance of showers and a slight chance of thunderstorms. Waves calm to 2 feet. .MONDAY NIGHT...Northwest winds 10 to 20 knots. Waves calm to 2 feet. .TUESDAY...West winds 10 to 20 knots. A slight chance of showers by mid afternoon. Waves calm to 2 feet. .TUESDAY NIGHT...Northwest winds 10 to 20 knots veering north after midnight. Waves calm to 2 feet. .WEDNESDAY...North winds 5 to 15 knots backing northwest. Waves calm to 2 feet. .THURSDAY...Southwest winds 5 to 15 knots veering west. Waves calm to 2 feet. $$ LSZ263-142200- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 959 AM EDT Sun Jul 14 2024 .REST OF TODAY...West winds 10 to 20 knots. Waves calm to 2 feet building to 1 to 3 feet. .TONIGHT...West winds 5 to 15 knots veering northwest after midnight, then becoming southwest less than 10 knots late. Haze. Waves subsiding to calm to 2 feet. .MONDAY...South winds 5 to 15 knots backing southeast in the afternoon, then veering northwest late. Haze. A chance of showers. A slight chance of thunderstorms by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to 2 feet. .TUESDAY...West winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. A slight chance of showers by mid afternoon. Waves calm to 2 feet. .TUESDAY NIGHT...Northwest winds 5 to 15 knots veering north after midnight. Waves calm to 2 feet. .WEDNESDAY...North winds 5 to 15 knots backing west. Waves calm to 2 feet. .THURSDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet. $$ LSZ264-142200- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 959 AM EDT Sun Jul 14 2024 .REST OF TODAY...West winds 10 to 20 knots backing southwest late. A slight chance of showers and thunderstorms by late morning. Waves calm to 2 feet building to 1 to 3 feet. .TONIGHT...West winds 5 to 15 knots veering northwest after midnight, then becoming west less than 10 knots late. Haze. Waves subsiding to calm to 2 feet. .MONDAY...South winds 5 to 15 knots backing east late. Haze. A chance of showers. A slight chance of thunderstorms by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...Northwest winds 5 to 15 knots. A slight chance of showers and thunderstorms through midnight. Waves calm to 2 feet. .TUESDAY...West winds 5 to 15 knots. A slight chance of showers by mid afternoon. Waves calm to 2 feet. .TUESDAY NIGHT...Northwest winds 5 to 15 knots veering north after midnight. Waves calm to 2 feet. .WEDNESDAY...North winds 5 to 15 knots backing northwest. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .THURSDAY...West winds 5 to 15 knots backing southwest. Waves calm to 2 feet. $$ LSZ265-142200- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 959 AM EDT Sun Jul 14 2024 .REST OF TODAY...West winds 10 to 20 knots. A slight chance of showers and thunderstorms by late morning. Waves calm to 2 feet. .TONIGHT...West winds 5 to 15 knots. Haze after midnight. Waves calm to 2 feet. .MONDAY...Southwest winds 5 to 15 knots becoming southeast 10 to 20 knots in the afternoon, then backing east late. Haze. A chance of showers. A slight chance of thunderstorms by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...Northwest winds 10 to 20 knots. A slight chance of showers and thunderstorms through midnight. Waves calm to 2 feet. .TUESDAY...West winds 10 to 20 knots veering northwest by mid afternoon. Waves calm to 2 feet. .TUESDAY NIGHT...Northwest winds 10 to 20 knots. Waves calm to 2 feet. .WEDNESDAY...North winds 10 to 20 knots backing northwest. Waves calm to 2 feet. .THURSDAY...Northwest winds 5 to 15 knots backing west. Waves calm to 2 feet. $$ LSZ266-142200- 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- 959 AM EDT Sun Jul 14 2024 .REST OF TODAY...West winds 10 to 20 knots. A slight chance of thunderstorms by late morning. A slight chance of showers. Waves calm to 2 feet building to 1 to 3 feet. .TONIGHT...West winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .MONDAY...South winds 5 to 15 knots backing southeast in the afternoon, then becoming east 10 to 20 knots late. Haze by mid afternoon. A chance of showers and a slight chance of thunderstorms by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...Northwest winds 10 to 20 knots. A slight chance of showers and thunderstorms through midnight. Waves calm to 2 feet. .TUESDAY...Northwest winds 10 to 20 knots. Waves building to 1 to 3 feet. .TUESDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .WEDNESDAY...Northwest winds 10 to 20 knots. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .THURSDAY...Northwest winds 5 to 15 knots backing west. Waves calm to 2 feet. $$ LSZ267-142200- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 959 AM EDT Sun Jul 14 2024 .REST OF TODAY...Southwest winds 10 to 20 knots veering west in the afternoon. A slight chance of showers and thunderstorms. Waves calm to 2 feet. .TONIGHT...Southwest winds 5 to 15 knots veering west late. Waves calm to 2 feet. .MONDAY...South winds 5 to 15 knots backing southeast in the afternoon, then becoming east 10 to 20 knots late. Haze by mid afternoon. A chance of showers by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...West winds 10 to 20 knots veering northwest after midnight. Haze through midnight. A chance of showers and thunderstorms. Waves building to 1 to 3 feet. .TUESDAY...Northwest winds 10 to 20 knots backing west by mid afternoon. Waves 1 to 3 feet. .TUESDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .WEDNESDAY...Northwest winds 10 to 20 knots. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .THURSDAY...Northwest winds 10 to 20 knots becoming west 5 to 15 knots. Waves calm to 2 feet. $$ LSZ261-142200- MAFOR 1415/ Superior West 11610 11520 11620 11610 11700 11600 11500 11400. A chance of showers Monday morning. Waves 1 to 3 feet subsiding to 1 foot or less this afternoon and tonight. Waves 1 foot or less Monday morning. Superior North Central 11620 12520 12610 11700 11600 11400. Waves 1 to 3 feet. Superior South Central 15610 11600 11500. Waves 2 feet or less. Superior East 11600 11610 12600 11500 12600 11400. Waves 1 to 2 feet. $$ Thompson Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes