Great Lakes Forecast
Issued by NWS
Issued by NWS
733 FZUS63 KMQT 240801 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 401 AM EDT Mon Jun 24 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 29.8 inch ridge over the Upper Great Lakes today will shift southeast, reaching the Appalachians on Tuesday while building to 30.0 inches. Tonight, a 29.3 inch low will track east through Manitoba, spinning across northern Ontario into James Bay Tuesday at 29.2 inches. This low will support a 29.5 inch trough crossing Lake Superior tonight and Tuesday. Behind the trough, 29.9 inch high pressure from the High Plains will extend into the Upper Great Lakes Wednesday. This high anchors and builds to 30.0 inches Thursday morning over the Upper Great Lakes. A 29.3 inch low tracks across northern Minnesota on Friday pushing a 29.4 inch trough over western Lake Superior Friday afternoon. LSZ162-241615- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 401 AM EDT Mon Jun 24 2024 /301 AM CDT Mon Jun 24 2024/ .EARLY THIS MORNING...Southwest winds 5 to 15 knots. Waves calm to 2 feet. .TODAY...South winds 5 to 15 knots backing east in the afternoon, then increasing to 10 to 20 knots late. Waves calm to 2 feet. .TONIGHT...East winds 10 to 20 knots veering south after midnight, then veering southwest late. A chance of showers and thunderstorms. Waves calm to 2 feet. .TUESDAY...Southwest winds 10 to 20 knots increasing to 15 to 25 knots in the afternoon, then veering west late. Waves building to 2 to 4 feet. .TUESDAY NIGHT...Northwest winds 10 to 20 knots veering north after midnight. Waves subsiding to calm to 2 feet. .WEDNESDAY...North winds 5 to 15 knots becoming south 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .WEDNESDAY NIGHT...Southwest winds 5 to 15 knots veering north after midnight. Waves calm to 2 feet. .THURSDAY...East winds 5 to 15 knots increasing to 10 to 20 knots. A chance of showers. Waves calm to 2 feet. .FRIDAY...Southeast winds 10 to 20 knots veering west. Showers likely. A chance of showers. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. $$ LSZ263-241615- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 401 AM EDT Mon Jun 24 2024 .EARLY THIS MORNING...Southwest winds 5 to 15 knots. Waves calm to 2 feet. .TODAY...South winds 5 to 15 knots backing southeast late. Waves calm to 2 feet. .TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots after midnight, then veering southwest late. A chance of showers and thunderstorms. Waves building to 1 to 3 feet. .TUESDAY...West winds 10 to 20 knots becoming southwest 15 to 25 knots in the afternoon, then veering west late. Waves building to 3 to 5 feet occasionally to 7 feet. .TUESDAY NIGHT...Northwest winds 10 to 20 knots veering north after midnight. Waves subsiding to 1 to 3 feet. .WEDNESDAY...North winds 5 to 15 knots backing southwest by mid afternoon. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...Southwest winds 5 to 15 knots becoming south less than 10 knots after midnight. Waves calm to 2 feet. .THURSDAY...South winds 5 to 15 knots becoming southeast 10 to 20 knots. A chance of showers. Waves building to 1 to 3 feet. .FRIDAY...South winds 10 to 20 knots veering west. Showers likely. A chance of thunderstorms. A chance of showers. Waves 1 to 3 feet. $$ LSZ264-241615- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 401 AM EDT Mon Jun 24 2024 .EARLY THIS MORNING...Southwest winds 5 to 15 knots. Waves calm to 2 feet. .TODAY...Southwest winds 5 to 15 knots backing southeast late. Waves calm to 2 feet. .TONIGHT...South winds 10 to 20 knots veering southwest late. A chance of showers and thunderstorms. Patchy fog after midnight. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .TUESDAY...West winds 10 to 20 knots increasing to 15 to 25 knots in the afternoon. Waves subsiding to 1 to 3 feet, then building to 3 to 5 feet occasionally to 7 feet. .TUESDAY NIGHT...North winds 10 to 20 knots. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. .WEDNESDAY...North winds 5 to 15 knots backing west by mid afternoon. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet. .THURSDAY...South winds 5 to 15 knots. A chance of showers. Waves building to 1 to 3 feet. .FRIDAY...Southeast winds 10 to 20 knots veering south. Showers likely. A chance of thunderstorms. A chance of showers. Waves building to 2 to 4 feet. $$ LSZ265-241615- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 401 AM EDT Mon Jun 24 2024 .EARLY THIS MORNING...West winds 5 to 15 knots. Waves calm to 2 feet. .TODAY...Southwest winds 5 to 15 knots becoming southeast 10 to 20 knots in the afternoon. Waves calm to 2 feet. .TONIGHT...South winds 10 to 20 knots increasing to 15 to 25 knots after midnight, then diminishing to 10 to 20 knots late. A chance of showers and thunderstorms after midnight. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .TUESDAY...West winds 10 to 20 knots increasing to 15 to 25 knots late. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .TUESDAY NIGHT...Northwest winds 15 to 25 knots becoming north 10 to 20 knots after midnight. Waves 1 to 3 feet. .WEDNESDAY...North winds 10 to 20 knots backing northwest by mid afternoon. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet. .THURSDAY...Southeast winds 5 to 15 knots becoming south 10 to 20 knots. A chance of showers. Waves calm to 2 feet. .FRIDAY...Southeast winds 15 to 25 knots veering south. A chance of showers. A chance of thunderstorms. Showers likely. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. $$ LSZ266-241615- 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- 401 AM EDT Mon Jun 24 2024 .EARLY THIS MORNING...West winds 5 to 15 knots. Waves calm to 2 feet. .TODAY...West winds 5 to 15 knots backing south in the afternoon, then becoming southeast 10 to 20 knots late. Waves calm to 2 feet. .TONIGHT...South winds 15 to 25 knots. A chance of showers and thunderstorms after midnight. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. .TUESDAY...Southwest winds 10 to 20 knots becoming west 15 to 25 knots in the afternoon. A slight chance of showers and thunderstorms through early afternoon. Waves building to 3 to 5 feet occasionally to 7 feet. .TUESDAY NIGHT...Northwest winds 15 to 25 knots veering north after midnight. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. .WEDNESDAY...North winds 10 to 20 knots backing northwest by mid afternoon. Waves subsiding to 1 to 3 feet. .WEDNESDAY NIGHT...Northwest winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .THURSDAY...Southeast winds 5 to 15 knots becoming south 10 to 20 knots. A chance of showers. Waves building to 1 to 3 feet. .FRIDAY...South winds 15 to 25 knots. A chance of showers. A chance of thunderstorms. Showers likely. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. $$ LSZ267-241615- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 401 AM EDT Mon Jun 24 2024 .EARLY THIS MORNING...West winds 5 to 15 knots. Waves 1 to 3 feet subsiding to calm to 2 feet. .TODAY...West winds 5 to 15 knots backing southwest in the afternoon, then backing southeast late. Waves calm to 2 feet. .TONIGHT...South winds 10 to 20 knots increasing to 15 to 25 knots after midnight. A chance of showers and thunderstorms after midnight. Waves building to 2 to 4 feet. .TUESDAY...South winds 15 to 25 knots becoming west 10 to 20 knots in the afternoon, then increasing to 15 to 25 knots late. A chance of showers and thunderstorms through early afternoon. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. .TUESDAY NIGHT...West winds 10 to 20 knots veering northwest after midnight. Waves 2 to 4 feet. .WEDNESDAY...North winds 10 to 20 knots backing northwest by mid afternoon. Waves subsiding to 1 to 3 feet. .WEDNESDAY NIGHT...Northwest winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet. .THURSDAY...West winds 5 to 15 knots becoming south 10 to 20 knots. Waves calm to 2 feet. .FRIDAY...Southeast winds 15 to 25 knots veering south. A chance of showers, then showers likely. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. $$ LSZ261-241615- MAFOR 2409/ Superior West 11500 11400 11300 11200 12310 11410 11510. A chance of showers and thunderstorms tonight. Waves 2 feet or less. Superior North Central 11600 12500 12310 12420 11426. A chance of thunderstorms overnight. Waves 2 feet or less today. Waves 1 to 3 feet building to 2 to 4 feet tonight. Superior South Central 11600 11500 12310 11320 13420. A chance of showers and thunderstorms overnight. Waves 2 feet or less today. Waves 1 to 3 feet building to 2 to 4 feet tonight. Superior East 12600 12400 11310 11320 11420 11430. A chance of showers overnight. Waves 1 to 2 feet today. Waves 1 to 3 feet building to 3 to 5 feet tonight. $$ Voss Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes