Great Lakes Forecast
Issued by NWS
Issued by NWS
353 FZUS63 KMQT 080808 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 408 AM EDT Wed May 8 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 29.5 inch low over eastern Upper Michigan moves east toward New England today. Meanwhile, a 29.4 inch low over the Northern Plains weakens as it settles southeast and phases with another low pressure system moving northeast out of the Southern Plains. The new low at 29.6 inches over the Mid Mississippi Valley this evening moves east tonight over the Ohio River Valley while weak ridging builds in over Lake Superior from the northeast. Weak 30.0 inch ridging holds over Lake Superior through Friday morning, then a 29.7 inch low pressure trough drops southeast across the Upper Great Lakes Friday and Friday night. This will be followed by weak ridging at 29.8 inches Saturday and Saturday night before an additional trough at 29.7 inches swings southeast over the Upper Great Lakes Sunday into Monday. LSZ162-081615- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 408 AM EDT Wed May 8 2024 /308 AM CDT Wed May 8 2024/ .EARLY THIS MORNING...Northeast winds 5 to 15 knots. Isolated rain showers. Waves 1 to 3 feet. .TODAY...Northeast winds 10 to 20 knots becoming east 15 to 25 knots in the afternoon. A slight chance of rain showers through early afternoon. Waves building to 3 to 6 feet occasionally to 8 feet. .TONIGHT...Northeast winds 10 to 20 knots increasing to 15 to 25 knots late. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet. .THURSDAY...Northeast winds 15 to 25 knots diminishing to 10 to 20 knots late. Waves subsiding to 1 to 3 feet. .THURSDAY NIGHT...West winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .FRIDAY...Southwest winds 10 to 20 knots. Rain showers likely by mid afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .FRIDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .SATURDAY...Northwest winds 10 to 20 knots backing southwest. Waves calm to 2 feet. .SUNDAY...Southwest winds 10 to 20 knots veering northwest. A chance of rain showers. Waves calm to 2 feet. $$ LSZ263-081615- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 408 AM EDT Wed May 8 2024 .EARLY THIS MORNING...Northeast winds 10 to 20 knots. Isolated rain showers. Waves 1 to 3 feet building to 2 to 4 feet. .TODAY...Northeast winds 15 to 25 knots diminishing to 10 to 20 knots late. A slight chance of rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. .TONIGHT...Northeast winds 15 to 25 knots. Waves subsiding to 2 to 4 feet, then building to 3 to 6 feet occasionally to 8 feet. .THURSDAY...Northeast winds 15 to 25 knots diminishing to 10 to 20 knots in the afternoon, then backing north late. Waves subsiding to 1 to 3 feet. .THURSDAY NIGHT...West winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .FRIDAY...Southwest winds 10 to 20 knots. A chance of rain showers. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .FRIDAY NIGHT...West winds 5 to 15 knots veering northwest after midnight. Waves subsiding to calm to 2 feet. .SATURDAY...West winds 5 to 15 knots backing southwest. Waves calm to 2 feet. .SUNDAY...Southwest winds 5 to 15 knots veering west. Waves calm to 2 feet. $$ LSZ264-081615- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 408 AM EDT Wed May 8 2024 .EARLY THIS MORNING...Northeast winds 15 to 25 knots. Isolated rain showers. Waves 2 to 4 feet building to 3 to 5 feet occasionally to 7 feet. .TODAY...Northeast winds 15 to 25 knots diminishing to 10 to 20 knots in the afternoon. A slight chance of rain showers through early afternoon. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 1 to 3 feet. .TONIGHT...Northeast winds 20 to 30 knots diminishing to 15 to 25 knots late. Waves building to 3 to 6 feet occasionally to 8 feet. .THURSDAY...Northeast winds 10 to 20 knots backing northwest late. Waves subsiding to calm to 2 feet. .THURSDAY NIGHT...Northwest winds 5 to 15 knots backing west after midnight. Waves calm to 2 feet. .FRIDAY...Southwest winds 5 to 15 knots. Waves building to 1 to 3 feet. .FRIDAY NIGHT...Southwest winds 5 to 15 knots veering north after midnight. Waves subsiding to calm to 2 feet. .SATURDAY...West winds 5 to 15 knots backing southwest. Waves calm to 2 feet. .SUNDAY...Southwest winds 5 to 15 knots. Waves building to 1 to 3 feet. $$ LSZ265-081615- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 408 AM EDT Wed May 8 2024 .EARLY THIS MORNING...North winds 5 to 15 knots. Scattered rain showers. Waves calm to 2 feet. .TODAY...North winds 5 to 15 knots increasing to 10 to 20 knots in the afternoon. A slight chance of rain showers through early afternoon. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .TONIGHT...North winds 5 to 15 knots veering northeast after midnight, then increasing to 10 to 20 knots late. Waves subsiding to 1 to 3 feet, then building to 3 to 5 feet occasionally to 7 feet. .THURSDAY...Northeast winds 10 to 20 knots backing north in the afternoon. Waves subsiding to calm to 2 feet. .THURSDAY NIGHT...Northwest winds 5 to 15 knots backing west after midnight. Waves calm to 2 feet. .FRIDAY...West winds 5 to 15 knots becoming southeast 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...Southeast winds 5 to 15 knots veering northwest after midnight. Waves calm to 2 feet. .SATURDAY...Northwest winds 10 to 20 knots backing west. Waves calm to 2 feet. .SUNDAY...Southwest winds 10 to 20 knots. A chance of rain showers. Waves calm to 2 feet. $$ LSZ266-081615- 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- 408 AM EDT Wed May 8 2024 .EARLY THIS MORNING...Northeast winds 10 to 20 knots. Scattered rain showers. Waves 1 to 3 feet building to 3 to 5 feet occasionally to 7 feet. .TODAY...Northeast winds 15 to 25 knots becoming north 10 to 20 knots in the afternoon. A slight chance of rain showers through early afternoon. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. .TONIGHT...North winds 15 to 25 knots veering northeast after midnight, then diminishing to 10 to 20 knots late. Waves building to 3 to 5 feet occasionally to 7 feet. .THURSDAY...Northeast winds 10 to 20 knots backing north in the afternoon. Waves subsiding to 1 to 3 feet. .THURSDAY NIGHT...Northwest winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .FRIDAY...West winds 5 to 15 knots backing south by mid afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...Southeast winds 5 to 15 knots becoming north 10 to 20 knots after midnight. Waves calm to 2 feet. .SATURDAY...Northwest winds 10 to 20 knots backing west. Waves calm to 2 feet. .SUNDAY...Southwest winds 10 to 20 knots. Waves building to 1 to 3 feet. $$ LSZ267-081615- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 408 AM EDT Wed May 8 2024 .EARLY THIS MORNING...Northeast winds 10 to 20 knots. Numerous rain showers. Waves calm to 2 feet building to 1 to 3 feet. .TODAY...North winds 15 to 25 knots diminishing to 10 to 20 knots in the afternoon. A chance of rain showers through early afternoon. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet. .TONIGHT...North winds 10 to 20 knots veering northeast after midnight. Waves building to 2 to 4 feet. .THURSDAY...Northeast winds 10 to 20 knots backing north in the afternoon. Waves subsiding to 1 to 3 feet. .THURSDAY NIGHT...North winds 10 to 20 knots. Waves building to 2 to 4 feet, then subsiding to calm to 2 feet. .FRIDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots by mid afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...Southeast winds 10 to 20 knots veering south after midnight. Waves calm to 2 feet. .SATURDAY...Northwest winds 10 to 20 knots. Waves calm to 2 feet. .SUNDAY...Southwest winds 10 to 20 knots. A chance of rain showers. Waves calm to 2 feet. $$ LSZ261-081615- MAFOR 0809/ Superior West 11110 11120 11130 12230 12120 11130. Waves 2 to 4 feet building to 3 to 6 feet today and tonight. Superior North Central 11130 11140 11130 11120 11110 11130 11140 11130. Waves 2 to 4 feet building to 3 to 6 feet. Superior South Central 11810 19816 14810 11800 11110 11120. Waves 2 to 5 feet today and tonight. Superior East 11126 11130 11120 11820 12810 12120. Waves 1 to 2 feet building to 2 to 5 feet today and tonight. $$ Jablonski Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes