Great Lakes Forecast
Issued by NWS
Issued by NWS
400 FZUS63 KMQT 151336 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 936 AM EDT Sat Jun 15 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...High pressure will build to 30.2 inches as it shifts over the central Great Lakes today, continuing on toward New England Sunday. Deepening low pressure near 29.4 inches tracks out of the High Plains Saturday night, spinning northeast towards northern Manitoba Sunday into Monday as it deepens to 29.0 inches. This low extends a 29.6 inch trough over Lake Superior Sunday night before weak ridging of 29.9 inches moves over Lake Superior from the Northern Plains Monday. A low pressure around 29.3 inches looks to move off the Colorado Rockies into the Northern Plains early next week. The low will track across northern Minnesota at 29.5 inches Tuesday, reaching James Bay Wednesday morning. This low will pull a 29.8 inch trough through Lake Superior Wednesday morning. LSZ162-152145- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 936 AM EDT Sat Jun 15 2024 /836 AM CDT Sat Jun 15 2024/ .REST OF TODAY...East winds 5 to 15 knots increasing to 10 to 20 knots late. A slight chance of showers by late morning. Waves calm to 2 feet. .TONIGHT...East winds 10 to 20 knots increasing to 15 to 25 knots late. A chance of showers through midnight. A chance of thunderstorms. Showers likely after midnight. Waves building to 1 to 3 feet. .SUNDAY...East winds 10 to 20 knots. A chance of showers and thunderstorms. Waves building to 2 to 4 feet, then subsiding to calm to 2 feet. .SUNDAY NIGHT...Northeast winds 10 to 20 knots becoming west 5 to 15 knots after midnight. A chance of showers and thunderstorms. Waves calm to 2 feet. .MONDAY...West winds 5 to 15 knots becoming northeast 10 to 20 knots by mid afternoon. A chance of showers through early afternoon. A chance of thunderstorms. Showers likely by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...Northeast winds 10 to 20 knots veering east after midnight. Thunderstorms likely through midnight. Showers likely. A chance of thunderstorms after midnight. Waves calm to 2 feet. .TUESDAY...South winds 10 to 20 knots veering west. Showers likely and a chance of thunderstorms. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .WEDNESDAY...West winds 10 to 20 knots becoming north 5 to 15 knots. A chance of showers. Waves calm to 2 feet. $$ LSZ263-152145- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 936 AM EDT Sat Jun 15 2024 .REST OF TODAY...South winds 5 to 15 knots backing east late. A slight chance of showers by late morning. Waves calm to 2 feet. .TONIGHT...South winds 5 to 15 knots becoming southeast 10 to 20 knots after midnight, then increasing to 15 to 25 knots late. A chance of showers through midnight, then showers and a slight chance of thunderstorms after midnight. Waves building to 2 to 4 feet. .SUNDAY...Southeast winds 15 to 25 knots becoming south 10 to 20 knots in the afternoon, then becoming southeast 5 to 15 knots late. A chance of showers and a slight chance of thunderstorms. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet. .SUNDAY NIGHT...Southeast winds 5 to 15 knots veering west after midnight. A chance of showers and thunderstorms. Waves subsiding to calm to 2 feet. .MONDAY...West winds 5 to 15 knots backing east by mid afternoon. A chance of showers through early afternoon. A chance of thunderstorms. Showers likely by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...East winds 5 to 15 knots. Showers likely through midnight. A chance of thunderstorms. A chance of showers after midnight. Waves calm to 2 feet. .TUESDAY...South winds 10 to 20 knots diminishing to 5 to 15 knots. A chance of showers and thunderstorms. Waves building to 1 to 3 feet. .WEDNESDAY...West winds 5 to 15 knots veering north. A chance of showers. Waves subsiding to calm to 2 feet. $$ LSZ264-152145- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 936 AM EDT Sat Jun 15 2024 .REST OF TODAY...South winds 10 to 20 knots becoming southeast 5 to 15 knots in the afternoon, then increasing to 10 to 20 knots late. Waves 1 to 3 feet building to 2 to 4 feet. .TONIGHT...South winds 10 to 20 knots becoming southeast 15 to 25 knots late. A chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .SUNDAY...Southeast winds 15 to 25 knots diminishing to 10 to 20 knots late. A chance of showers and a slight chance of thunderstorms. Waves building to 3 to 6 feet occasionally to 8 feet. .SUNDAY NIGHT...South winds 5 to 15 knots veering southwest after midnight. A slight chance of showers and thunderstorms. Waves subsiding to calm to 2 feet. .MONDAY...Southwest winds 5 to 15 knots backing southeast by mid afternoon. A chance of showers. Waves calm to 2 feet. .MONDAY NIGHT...East winds 5 to 15 knots veering southeast after midnight. A chance of showers and thunderstorms. Waves calm to 2 feet. .TUESDAY...South winds 10 to 20 knots diminishing to 5 to 15 knots. A chance of showers and thunderstorms. Waves building to 1 to 3 feet. .WEDNESDAY...West winds 5 to 15 knots veering north. A chance of showers. Waves subsiding to calm to 2 feet. $$ LSZ265-152145- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 936 AM EDT Sat Jun 15 2024 .REST OF TODAY...Southeast winds 10 to 20 knots increasing to 15 to 25 knots in the afternoon. A slight chance of showers by late morning. Waves calm to 2 feet building to 1 to 3 feet. .TONIGHT...South winds 15 to 25 knots becoming southeast 20 to 30 knots late. A slight chance of showers through midnight, then showers after midnight. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .SUNDAY...Southeast winds 20 to 30 knots diminishing to 15 to 25 knots late. Showers through early afternoon. A slight chance of thunderstorms. A chance of showers by mid afternoon. Waves subsiding to 1 to 3 feet. .SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest 5 to 15 knots after midnight. A chance of showers and thunderstorms. Waves subsiding to calm to 2 feet. .MONDAY...West winds 5 to 15 knots becoming east 10 to 20 knots by mid afternoon. A chance of showers and thunderstorms. Waves calm to 2 feet. .MONDAY NIGHT...Southeast winds 10 to 20 knots veering south after midnight. A chance of showers and thunderstorms. Waves calm to 2 feet. .TUESDAY...South winds 15 to 25 knots diminishing to 10 to 20 knots. A chance of showers and thunderstorms. Waves calm to 2 feet. .WEDNESDAY...West winds 10 to 20 knots becoming northwest 5 to 15 knots. A chance of showers. Waves calm to 2 feet. $$ LSZ266-152145- 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- 936 AM EDT Sat Jun 15 2024 .REST OF TODAY...South winds 10 to 20 knots backing southeast in the afternoon, then increasing to 15 to 25 knots late. A slight chance of showers by late morning. Waves 1 to 3 feet building to 2 to 4 feet. .TONIGHT...South winds 15 to 25 knots backing southeast late. Showers after midnight. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .SUNDAY...Southeast winds 20 to 30 knots veering south in the afternoon, then diminishing to 15 to 25 knots late. Showers through early afternoon. A chance of thunderstorms. A chance of showers by mid afternoon. Waves building to 3 to 6 feet occasionally to 8 feet. .SUNDAY NIGHT...South winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. A chance of showers and thunderstorms. Waves subsiding to calm to 2 feet. .MONDAY...West winds 5 to 15 knots becoming east 10 to 20 knots by mid afternoon. A chance of showers and thunderstorms. Waves calm to 2 feet. .MONDAY NIGHT...Southeast winds 10 to 20 knots veering south after midnight. A chance of showers and thunderstorms. Waves building to 1 to 3 feet. .TUESDAY...South winds 15 to 25 knots diminishing to 10 to 20 knots. A chance of showers. A chance of thunderstorms. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .WEDNESDAY...West winds 10 to 20 knots becoming northwest 5 to 15 knots. A chance of showers. Waves subsiding to calm to 2 feet. $$ LSZ267-152145- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 936 AM EDT Sat Jun 15 2024 .REST OF TODAY...Southeast winds 10 to 20 knots. Waves calm to 2 feet. .TONIGHT...South winds 10 to 20 knots becoming southeast 15 to 25 knots late. A chance of showers after midnight. Waves building to 2 to 4 feet. .SUNDAY...Southeast winds 20 to 30 knots becoming south 15 to 25 knots late. Showers and a slight chance of thunderstorms. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .SUNDAY NIGHT...South winds 10 to 20 knots. A chance of showers and thunderstorms. Waves subsiding to calm to 2 feet. .MONDAY...Southwest winds 10 to 20 knots backing south by mid afternoon. A chance of showers and thunderstorms. Waves calm to 2 feet. .MONDAY NIGHT...Southeast winds 10 to 20 knots veering south after midnight. A chance of showers and thunderstorms. Waves calm to 2 feet. .TUESDAY...South winds 15 to 25 knots. A chance of showers and thunderstorms. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .WEDNESDAY...West winds 10 to 20 knots becoming northwest 5 to 15 knots. A chance of showers and thunderstorms. Waves subsiding to calm to 2 feet. $$ LSZ261-152145- MAFOR 1515/ Superior West 11200 12210 11310 11320 12326 11320. A chance of thunderstorms overnight and Sunday morning. Waves 1 to 3 feet. Superior North Central 11420 12320 11330 12430 12346. Waves 1 to 3 feet this afternoon. Waves 2 to 4 feet tonight. Waves 3 to 6 feet Sunday morning. Superior South Central 13320 12420 11326 12336. Waves 1 to 3 feet this afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet tonight. Waves 2 to 4 feet Sunday morning. Superior East 13310 12420 11320 11330 11336. Waves 1 to 3 feet this afternoon and tonight. Waves 3 to 5 feet Sunday morning. $$ WFO MQT Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes