Great Lakes Forecast
Issued by NWS
Issued by NWS
393 FZUS63 KMQT 150154 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 954 PM EDT Fri Jun 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 30.1 high pressure centered over Lake Superior tonight will build to 30.2 inches as it shifts over the central Great Lakes Saturday, continuing on toward New England Sunday. Deepening low pressure near 29.4 inches tracks out of the High Plains Saturday night, spinning northeast towards Hudson Bay 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 29.5 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 by Tuesday night and continue northeast across northern Ontario into Wednesday morning. This low will support a 29.9 inch trough over Lake Superior through Wednesday morning. LSZ162-151000- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 954 PM EDT Fri Jun 14 2024 /854 PM CDT Fri Jun 14 2024/ .LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Waves calm to 2 feet. .TONIGHT...East winds 5 to 15 knots backing northeast after midnight, then veering east late. Waves calm to 2 feet. .SATURDAY...Northeast winds 5 to 15 knots becoming east 10 to 20 knots in the afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...South winds 10 to 20 knots becoming east 15 to 25 knots after midnight. A chance of showers through midnight. A slight chance of thunderstorms. Showers after midnight. Waves building to 1 to 3 feet. .SUNDAY...East winds 15 to 25 knots diminishing to 10 to 20 knots by mid afternoon. A chance of showers and a slight chance of thunderstorms. Waves subsiding to calm to 2 feet. .SUNDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. A chance of showers. 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...East winds 10 to 20 knots backing northeast after midnight. Showers likely and a chance of thunderstorms. Waves calm to 2 feet. .TUESDAY...East winds 10 to 20 knots veering southwest. A chance of showers and thunderstorms. Waves building to 1 to 3 feet. .WEDNESDAY...West winds 10 to 20 knots becoming north 5 to 15 knots. A chance of showers. Waves subsiding to calm to 2 feet. $$ LSZ263-151000- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 954 PM EDT Fri Jun 14 2024 .LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to 2 feet. .TONIGHT...East winds less than 10 knots becoming southeast 5 to 15 knots after midnight, then veering south late. Waves calm to 2 feet. .SATURDAY...South winds 5 to 15 knots backing east late. Waves calm to 2 feet. .SATURDAY NIGHT...South winds 10 to 20 knots backing southeast after midnight, then increasing to 15 to 25 knots late. A chance of showers through midnight, then showers and a slight chance of thunderstorms after midnight. Waves building to 2 to 4 feet. .SUNDAY...Southeast winds 15 to 25 knots diminishing to 10 to 20 knots by mid afternoon. Showers likely through early afternoon. A slight chance of thunderstorms. A slight chance of showers by mid afternoon. Waves subsiding to 1 to 3 feet. .SUNDAY NIGHT...Southwest winds 5 to 15 knots veering west after midnight. Waves subsiding to calm to 2 feet. .MONDAY...West winds 5 to 15 knots veering northeast by mid afternoon. A chance of showers through early afternoon. Showers likely by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...East winds 5 to 15 knots. Showers likely through midnight. A chance of thunderstorms. A chance of showers after midnight. Waves calm to 2 feet. .TUESDAY...South winds 10 to 20 knots becoming southwest 5 to 15 knots. A chance of showers. Waves building to 1 to 3 feet. .WEDNESDAY...Southwest winds 5 to 15 knots. A chance of showers. Waves subsiding to calm to 2 feet. $$ LSZ264-151000- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 954 PM EDT Fri Jun 14 2024 .LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Waves calm to 2 feet. .TONIGHT...South winds 5 to 15 knots. Waves calm to 2 feet. .SATURDAY...South winds 5 to 15 knots becoming southeast 10 to 20 knots late. Waves building to 1 to 3 feet. .SATURDAY NIGHT...South winds 10 to 20 knots becoming southeast 20 to 30 knots late. A slight chance of showers through midnight, then showers likely after midnight. Waves building to 2 to 4 feet. .SUNDAY...Southeast winds 20 to 30 knots diminishing to 15 to 25 knots by mid afternoon. Showers likely through early afternoon. A slight chance of thunderstorms. A chance of showers by mid afternoon. Waves building to 3 to 5 feet occasionally to 7 feet. .SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet. .MONDAY...West winds 5 to 15 knots backing south by mid afternoon. A chance of showers. Waves calm to 2 feet. .MONDAY NIGHT...Southeast winds 5 to 15 knots. A chance of showers. Waves calm to 2 feet. .TUESDAY...Southeast winds 5 to 15 knots veering south. A chance of showers. Waves building to 1 to 3 feet. .WEDNESDAY...Southwest winds 5 to 15 knots veering west. A chance of showers. Waves subsiding to calm to 2 feet. $$ LSZ265-151000- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 954 PM EDT Fri Jun 14 2024 .LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Waves calm to 2 feet. .TONIGHT...Southeast winds 5 to 15 knots veering south after midnight. Waves calm to 2 feet. .SATURDAY...Southeast winds 10 to 20 knots increasing to 15 to 25 knots in the afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...South winds 15 to 25 knots becoming southeast 20 to 30 knots late. A slight chance of showers through midnight, then showers likely after midnight. Waves calm to 2 feet. .SUNDAY...Southeast winds 20 to 30 knots diminishing to 15 to 25 knots by mid afternoon. Showers likely through early afternoon. A chance of thunderstorms. A chance of showers by mid afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet. .MONDAY...West winds 5 to 15 knots becoming east 10 to 20 knots by mid afternoon. A chance of showers. Waves calm to 2 feet. .MONDAY NIGHT...Southeast winds 10 to 20 knots. A chance of showers. Waves calm to 2 feet. .TUESDAY...South winds 15 to 25 knots diminishing to 10 to 20 knots. A chance of showers. Waves calm to 2 feet. .WEDNESDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots. A chance of showers. Waves calm to 2 feet. $$ LSZ266-151000- 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- 954 PM EDT Fri Jun 14 2024 .LATE THIS AFTERNOON...West winds 5 to 15 knots. Waves calm to 2 feet. .TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots late. Waves calm to 2 feet. .SATURDAY...South winds 10 to 20 knots increasing to 15 to 25 knots late. Waves building to 1 to 3 feet. .SATURDAY NIGHT...South winds 15 to 25 knots backing southeast late. A chance of showers after midnight. Waves building to 2 to 4 feet. .SUNDAY...Southeast winds 20 to 30 knots veering south by mid afternoon. Showers through early afternoon. A slight 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 becoming southwest 5 to 15 knots after midnight. A chance of showers. Waves subsiding to calm to 2 feet. .MONDAY...West winds 5 to 15 knots becoming southeast 10 to 20 knots by mid afternoon. A chance of showers. Waves calm to 2 feet. .MONDAY NIGHT...Southeast winds 10 to 20 knots veering south after midnight. A chance of showers. Waves calm to 2 feet. .TUESDAY...South winds 15 to 25 knots diminishing to 10 to 20 knots. A chance of showers. Waves building to 2 to 4 feet. .WEDNESDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots. A chance of showers. Waves subsiding to calm to 2 feet. $$ LSZ267-151000- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 954 PM EDT Fri Jun 14 2024 .LATE THIS AFTERNOON...West winds 5 to 15 knots. Waves calm to 2 feet. .TONIGHT...Northwest winds 5 to 15 knots backing southeast after midnight, then veering south late. Waves calm to 2 feet. .SATURDAY...South winds 10 to 20 knots backing southeast in the afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...South winds 10 to 20 knots increasing to 15 to 25 knots after midnight, then backing southeast late. A chance of showers after midnight. Waves building to 1 to 3 feet. .SUNDAY...Southeast winds 20 to 30 knots. Showers. A slight chance of thunderstorms by mid afternoon. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .SUNDAY NIGHT...South winds 15 to 25 knots becoming southwest 10 to 20 knots after midnight. A chance of showers and thunderstorms. Waves subsiding to calm to 2 feet. .MONDAY...Southwest winds 10 to 20 knots backing southeast by mid afternoon. A chance of showers by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...South winds 10 to 20 knots. A chance of showers. Waves calm to 2 feet. .TUESDAY...South winds 15 to 25 knots. A chance of showers. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .WEDNESDAY...Southwest winds 10 to 20 knots veering west. A chance of showers. Waves subsiding to calm to 2 feet. $$ LSZ261-151000- MAFOR 1421/ Superior West 11200 13100 11200 11400 11300 11210. Waves 1 foot or less. Superior North Central 11310 11400 13410 12420 11320. Waves 1 to 3 feet. Superior South Central 12300 12400 11410 13320. Waves 1 to 3 feet. Superior East 12600 11700 12400 11410 12310. Waves 2 feet or less. $$ JSS Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes