Great Lakes Forecast
Issued by NWS
Issued by NWS
965 FZUS63 KMQT 091944 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 344 PM EDT Thu May 9 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 30.0 inch ridge will remain over Lake Superior today, while a weak 29.7 inch clipper approaches from the northwest on Friday. A 29.8 inch ridge will build in briefly on Saturday, while another clipper at 29.6 inches approaches from the northwest on Sunday. A high pressure ridge of 29.8 inches follows for early next week. LSZ162-100345- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 344 PM EDT Thu May 9 2024 /244 PM CDT Thu May 9 2024/ .LATE THIS AFTERNOON...Northeast winds 10 to 20 knots. Waves 2 to 4 feet. .TONIGHT...North winds 5 to 15 knots backing west after midnight, then backing southwest late. Waves subsiding to calm to 2 feet. .FRIDAY...Southwest winds 5 to 15 knots increasing to 10 to 20 knots in the afternoon. A chance of rain showers and a slight chance of thunderstorms by mid afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...West winds 10 to 20 knots veering northwest after midnight. A chance of rain showers and a slight chance of thunderstorms through midnight. Waves calm to 2 feet. .SATURDAY...West winds 10 to 20 knots backing south by mid afternoon. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .SATURDAY NIGHT...South winds 10 to 20 knots veering southwest after midnight. A chance of rain showers. Waves calm to 2 feet. .SUNDAY...Southwest winds 15 to 25 knots veering west by mid afternoon. A chance of showers. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .SUNDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .MONDAY...South winds 10 to 20 knots backing northeast. Waves calm to 2 feet. .TUESDAY...East winds 10 to 20 knots backing northeast. A chance of rain showers. Waves building to 1 to 3 feet. $$ LSZ263-100345- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 344 PM EDT Thu May 9 2024 .LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. .TONIGHT...North winds 5 to 15 knots backing west after midnight. Waves subsiding to calm to 2 feet. .FRIDAY...Southwest winds 5 to 15 knots increasing to 10 to 20 knots in the afternoon, then diminishing to 5 to 15 knots late. A slight chance of rain showers by mid afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...West winds 5 to 15 knots veering northwest after midnight. A slight chance of rain showers through midnight. Waves calm to 2 feet. .SATURDAY...Northwest winds 5 to 15 knots becoming southwest 10 to 20 knots by mid afternoon. Waves building to 1 to 3 feet. .SATURDAY NIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots after midnight. A chance of rain showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .SUNDAY...Southwest winds 10 to 20 knots veering west by mid afternoon. A chance of showers. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .SUNDAY NIGHT...West winds 5 to 15 knots veering north after midnight. Waves subsiding to calm to 2 feet. .MONDAY...North winds 5 to 15 knots veering northeast. Waves calm to 2 feet. .TUESDAY...Northeast winds 5 to 15 knots veering east. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. $$ LSZ264-100345- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 344 PM EDT Thu May 9 2024 .LATE THIS AFTERNOON...Northwest winds 5 to 15 knots. Waves calm to 2 feet. .TONIGHT...Northwest winds 5 to 15 knots backing west late. Waves calm to 2 feet. .FRIDAY...Southwest winds 5 to 15 knots. A slight chance of rain showers by mid afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...South winds 5 to 15 knots veering west after midnight, then veering northwest late. A slight chance of rain showers through midnight. Waves calm to 2 feet. .SATURDAY...Northwest winds 5 to 15 knots backing west by mid afternoon. Waves building to 1 to 3 feet. .SATURDAY NIGHT...Southwest winds 5 to 15 knots becoming south 10 to 20 knots after midnight. A chance of rain showers. Waves 1 to 3 feet. .SUNDAY...Southwest winds 15 to 25 knots diminishing to 10 to 20 knots by mid afternoon. A chance of showers. Waves 1 to 3 feet. .SUNDAY NIGHT...Southwest winds 5 to 15 knots veering north after midnight. Waves 1 to 3 feet. .MONDAY...Northwest winds 5 to 15 knots veering north. Waves subsiding to calm to 2 feet. .TUESDAY...North winds 5 to 15 knots veering east. Waves calm to 2 feet. $$ LSZ265-100345- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 344 PM EDT Thu May 9 2024 .LATE THIS AFTERNOON...North winds 10 to 20 knots. Waves calm to 2 feet. .TONIGHT...Northwest winds 5 to 15 knots backing west after midnight. Waves calm to 2 feet. .FRIDAY...West winds 10 to 20 knots becoming south 5 to 15 knots in the afternoon, then backing southeast late. Waves calm to 2 feet. .FRIDAY NIGHT...Southeast winds 5 to 15 knots veering northwest after midnight. A slight chance of rain showers through midnight. Waves calm to 2 feet. .SATURDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet. .SATURDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet. .SUNDAY...South winds 10 to 20 knots. A chance of showers. Waves calm to 2 feet. .SUNDAY NIGHT...Southwest winds 10 to 20 knots veering northwest after midnight. Waves calm to 2 feet. .MONDAY...North winds 10 to 20 knots. Waves calm to 2 feet. .TUESDAY...North winds 10 to 20 knots veering east. Waves calm to 2 feet. $$ LSZ266-100345- 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- 344 PM EDT Thu May 9 2024 .LATE THIS AFTERNOON...North winds 10 to 20 knots. Waves 1 to 3 feet subsiding to calm to 2 feet. .TONIGHT...Northwest winds 5 to 15 knots. Waves calm to 2 feet. .FRIDAY...Northwest winds 5 to 15 knots veering east late. Waves calm to 2 feet. .FRIDAY NIGHT...Southeast winds 5 to 15 knots backing east after midnight, then backing northwest late. A slight chance of rain showers. Waves calm to 2 feet. .SATURDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet. .SATURDAY NIGHT...West winds 5 to 15 knots becoming south 10 to 20 knots after midnight. Waves calm to 2 feet. .SUNDAY...South winds 15 to 25 knots diminishing to 10 to 20 knots by mid afternoon. A chance of rain showers. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .SUNDAY NIGHT...Southwest winds 10 to 20 knots veering northwest after midnight. Waves building to 1 to 3 feet. .MONDAY...Northwest winds 10 to 20 knots veering north. Waves subsiding to calm to 2 feet. .TUESDAY...North winds 10 to 20 knots. Waves calm to 2 feet. $$ LSZ267-100345- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 344 PM EDT Thu May 9 2024 .LATE THIS AFTERNOON...North winds 10 to 20 knots. Waves calm to 2 feet. .TONIGHT...North winds 10 to 20 knots diminishing to 5 to 15 knots late. Waves calm to 2 feet. .FRIDAY...West winds 5 to 15 knots increasing to 10 to 20 knots in the afternoon, then becoming northwest 5 to 15 knots late. Waves calm to 2 feet. .FRIDAY NIGHT...Southeast winds 5 to 15 knots veering south after midnight, then veering west late. Waves calm to 2 feet. .SATURDAY...Northwest winds 10 to 20 knots backing west by mid afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...West winds 10 to 20 knots backing south after midnight. Waves calm to 2 feet. .SUNDAY...South winds 15 to 25 knots. A chance of rain showers through early afternoon, then rain showers likely by mid afternoon. Waves building to 1 to 3 feet. .SUNDAY NIGHT...South winds 10 to 20 knots veering west after midnight. A chance of rain showers through midnight. Waves subsiding to calm to 2 feet. .MONDAY...Northwest winds 10 to 20 knots. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .TUESDAY...Northwest winds 10 to 20 knots veering northeast. Waves calm to 2 feet. $$ LSZ261-100345- MAFOR 0921/ Superior West 11120 11800 11700 11600 11500 13510. Waves 1 to 3 feet. Superior North Central 11700 13710 12610 12510. Waves 1 to 2 feet. Superior South Central 11800 13700 11600 11610 11700 11200. Waves 1 to 3 feet subsiding to 1 foot or less tonight and Friday. Superior East 11710 12810 12800 11700 11600 11700. Waves 1 to 2 feet. $$ BW Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes