Great Lakes Forecast
Issued by NWS
Issued by NWS
977 FZUS63 KMQT 031343 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 943 AM EDT Wed Jul 3 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 29.3 inch low continues its east-northeast advancement toward Hudson Bay this morning as it drags a 29.7 inch trough across Lake Superior. In its wake, a weak 29.9 inch high pressure ridge will shift east, reaching the western Great Lakes on Thursday. A 29.7 inch low pressure organizing over the Plains on Thursday will then track to the Great Lakes region on Friday. The low continues northeast over the Great Lakes, reaching Quebec by Saturday afternoon. Then a 29.8 inch trough approaches the western Great Lakes on Sunday. LSZ162-032145- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 943 AM EDT Wed Jul 3 2024 /843 AM CDT Wed Jul 3 2024/ .REST OF TODAY...Southwest winds 15 to 25 knots veering west late. A slight chance of showers by mid afternoon. Waves 1 to 3 feet building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .TONIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. A slight chance of showers through midnight. Waves subsiding to calm to 2 feet. .THURSDAY...West winds 5 to 15 knots backing south in the afternoon, then backing east late. Waves calm to 2 feet. .THURSDAY NIGHT...Northeast winds 5 to 15 knots increasing to 10 to 20 knots after midnight. A slight chance of showers and thunderstorms. Waves calm to 2 feet. .FRIDAY...Northeast winds 10 to 20 knots. A chance of showers. Waves calm to 2 feet. .FRIDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet. .SATURDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet. .SUNDAY...Southwest winds 10 to 20 knots veering west. A chance of showers. Waves calm to 2 feet. $$ LSZ263-032145- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 943 AM EDT Wed Jul 3 2024 .REST OF TODAY...Southwest winds 10 to 20 knots veering west late. Patchy dense fog by late morning. A slight chance of showers by mid afternoon. Waves 1 to 3 feet building to 3 to 5 feet occasionally to 7 feet. .TONIGHT...West winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .THURSDAY...West winds less than 10 knots becoming southwest 5 to 15 knots in the afternoon, then backing east late. Waves calm to 2 feet. .THURSDAY NIGHT...East winds 5 to 15 knots backing northeast after midnight. A slight chance of showers. A slight chance of thunderstorms after midnight. Waves calm to 2 feet. .FRIDAY...Northeast winds 5 to 15 knots. A chance of showers. Waves calm to 2 feet. .FRIDAY NIGHT...North winds 5 to 15 knots backing west after midnight. Waves calm to 2 feet. .SATURDAY...West winds 5 to 15 knots backing southwest. Waves calm to 2 feet. .SUNDAY...Southwest winds 5 to 15 knots. A chance of showers. Waves calm to 2 feet. $$ LSZ264-032145- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 943 AM EDT Wed Jul 3 2024 .REST OF TODAY...Southwest winds 10 to 20 knots. Patchy fog by late morning. A slight chance of showers by mid afternoon. Waves 1 to 3 feet building to 3 to 5 feet occasionally to 7 feet. .TONIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet. .THURSDAY...West winds less than 10 knots increasing to 5 to 15 knots in the afternoon, then becoming southwest less than 10 knots late. Waves calm to 2 feet. .THURSDAY NIGHT...East winds less than 10 knots increasing to 5 to 15 knots after midnight. Waves calm to 2 feet. .FRIDAY...Northeast winds 5 to 15 knots. A chance of showers. Waves calm to 2 feet. .FRIDAY NIGHT...North winds 5 to 15 knots backing northwest after midnight. A chance of showers. Waves calm to 2 feet. .SATURDAY...West winds 5 to 15 knots backing southwest. Waves calm to 2 feet. .SUNDAY...South winds 5 to 15 knots veering southwest. Waves calm to 2 feet. $$ LSZ265-032145- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 943 AM EDT Wed Jul 3 2024 .REST OF TODAY...West winds 10 to 20 knots. A slight chance of showers by mid afternoon. Waves calm to 2 feet. .TONIGHT...West winds 5 to 15 knots. Waves calm to 2 feet. .THURSDAY...West winds 5 to 15 knots veering northeast in the afternoon, then veering east late. Waves calm to 2 feet. .THURSDAY NIGHT...East winds 5 to 15 knots. A slight chance of showers after midnight. Waves calm to 2 feet. .FRIDAY...Northeast winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. A chance of showers through early afternoon, then showers likely by mid afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...North winds 10 to 20 knots backing northwest after midnight. A chance of showers. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .SATURDAY...Northwest winds 10 to 20 knots becoming south 5 to 15 knots. Waves calm to 2 feet. .SUNDAY...South winds 5 to 15 knots becoming southwest 10 to 20 knots. A chance of showers and thunderstorms. Waves calm to 2 feet. $$ LSZ266-032145- 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- 943 AM EDT Wed Jul 3 2024 .REST OF TODAY...Southwest winds 10 to 20 knots veering west in the afternoon. A slight chance of showers by mid afternoon. Waves 1 to 3 feet building to 3 to 5 feet occasionally to 7 feet. .TONIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots late. Waves subsiding to calm to 2 feet. .THURSDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet. .THURSDAY NIGHT...East winds 5 to 15 knots backing northeast after midnight. A slight chance of showers after midnight. Waves calm to 2 feet. .FRIDAY...Northeast winds 5 to 15 knots becoming north 10 to 20 knots by mid afternoon. A chance of showers through early afternoon, then showers likely by mid afternoon. Waves building to 1 to 3 feet. .FRIDAY NIGHT...North winds 10 to 20 knots. Showers likely through midnight. A chance of showers after midnight. Waves building to 2 to 4 feet. .SATURDAY...Northwest winds 10 to 20 knots becoming south 5 to 15 knots. Waves subsiding to calm to 2 feet. .SUNDAY...South winds 5 to 15 knots increasing to 10 to 20 knots. A chance of showers. Waves calm to 2 feet. $$ LSZ267-032145- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 943 AM EDT Wed Jul 3 2024 .REST OF TODAY...Southwest winds 10 to 20 knots veering west in the afternoon. Waves calm to 2 feet. .TONIGHT...Southwest winds 10 to 20 knots veering west after midnight, then diminishing to 5 to 15 knots late. A slight chance of showers through midnight. Waves calm to 2 feet. .THURSDAY...Northwest winds 5 to 15 knots backing west in the afternoon, then veering northwest late. Waves calm to 2 feet. .THURSDAY NIGHT...North winds 5 to 15 knots veering northeast after midnight. Waves calm to 2 feet. .FRIDAY...East winds 5 to 15 knots becoming north 10 to 20 knots by mid afternoon. A chance of showers through early afternoon, then showers by mid afternoon. Waves building to 1 to 3 feet. .FRIDAY NIGHT...North winds 10 to 20 knots. Showers likely through midnight. A chance of showers after midnight. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .SATURDAY...Northwest winds 10 to 20 knots becoming west 5 to 15 knots. A chance of showers. Waves subsiding to calm to 2 feet. .SUNDAY...South winds 10 to 20 knots. A chance of showers and thunderstorms. Waves calm to 2 feet. $$ LSZ261-032145- MAFOR 0315/ Superior West 12520 11620 11610 14600. Waves 3 to 5 feet this afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet tonight. Waves 1 foot or less Thursday morning. Superior North Central 11520 12530 11620 11610 12600 11700. Waves 2 to 4 feet building to 3 to 5 feet this afternoon. Waves 3 to 5 feet subsiding to 2 to 3 feet tonight. Waves 1 to 3 feet Thursday morning. Superior South Central 15610 11600 11700. Waves 2 feet or less. Superior East 14510 11510 11610 12700. Waves 1 to 2 feet. $$ LC Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes