Great Lakes Forecast
Issued by NWS
Issued by NWS
545 FZUS63 KMQT 231343 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 943 AM EDT Mon Sep 23 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...30.0 inch high pressure centered over Ontario is extending into the Great Lakes today. On Tuesday, a 29.8 inch low pressure will track northeast to lower Michigan while a weakening 29.8 inch trough lifts from northern Minnesota into Ontario. 30.0 inch high pressure builds over the Lower MS Valley Wednesday, building to 30.1 inches Thursday. High pressure continues over the Great Lakes Friday. LSZ162-232145- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 943 AM EDT Mon Sep 23 2024 /843 AM CDT Mon Sep 23 2024/ .REST OF TODAY...South winds 5 to 15 knots becoming east 10 to 20 knots late. Waves calm to 2 feet. .TONIGHT...East winds 10 to 20 knots becoming south 5 to 15 knots after midnight. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .TUESDAY...South winds 5 to 15 knots backing east late. Waves subsiding to calm to 2 feet. .TUESDAY NIGHT...East winds 5 to 15 knots veering west after midnight. Waves calm to 2 feet. .WEDNESDAY...West winds 5 to 15 knots becoming southwest 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest after midnight. Waves calm to 2 feet. .THURSDAY...East winds 5 to 15 knots. Waves calm to 2 feet. .FRIDAY...South winds 5 to 15 knots backing east. Waves calm to 2 feet. $$ LSZ263-232145- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 943 AM EDT Mon Sep 23 2024 .REST OF TODAY...South winds 5 to 15 knots backing east late. Waves calm to 2 feet. .TONIGHT...Southeast winds 10 to 20 knots veering south late. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .TUESDAY...South winds 5 to 15 knots backing northeast late. Waves subsiding to calm to 2 feet. .TUESDAY NIGHT...East winds 5 to 15 knots veering west after midnight. Waves calm to 2 feet. .WEDNESDAY...West winds 10 to 20 knots. Waves calm to 2 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest after midnight. Waves calm to 2 feet. .THURSDAY...Southeast winds 5 to 15 knots veering south. Waves calm to 2 feet. .FRIDAY...Southwest winds 5 to 15 knots backing southeast. Waves calm to 2 feet. $$ LSZ264-232145- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 943 AM EDT Mon Sep 23 2024 .REST OF TODAY...Southeast winds less than 10 knots becoming south 5 to 15 knots in the afternoon, then backing southeast late. Waves calm to 2 feet. .TONIGHT...Southeast winds 5 to 15 knots veering south late. Waves building to 1 to 3 feet. .TUESDAY...South winds 5 to 15 knots backing southeast in the afternoon. Waves subsiding to calm to 2 feet. .TUESDAY NIGHT...Southeast winds 5 to 15 knots veering west after midnight. Waves calm to 2 feet. .WEDNESDAY...West winds 10 to 20 knots. Waves calm to 2 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots becoming northwest less than 10 knots after midnight. Waves calm to 2 feet. .THURSDAY...Southeast winds 5 to 15 knots veering south. Waves calm to 2 feet. .FRIDAY...South winds 5 to 15 knots backing southeast. Waves calm to 2 feet. $$ LSZ265-232145- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 943 AM EDT Mon Sep 23 2024 .REST OF TODAY...East winds 5 to 15 knots increasing to 10 to 20 knots late. Waves calm to 2 feet. .TONIGHT...Southeast winds 10 to 20 knots becoming south 5 to 15 knots late. Waves calm to 2 feet. .TUESDAY...Southeast winds 5 to 15 knots becoming east 10 to 20 knots late. Waves calm to 2 feet. .TUESDAY NIGHT...Southeast winds 5 to 15 knots veering west after midnight. Waves calm to 2 feet. .WEDNESDAY...West winds 10 to 20 knots. Waves calm to 2 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet. .THURSDAY...East winds 5 to 15 knots veering southeast. Waves calm to 2 feet. .FRIDAY...South winds 5 to 15 knots backing southeast. Waves calm to 2 feet. $$ LSZ266-232145- 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 Mon Sep 23 2024 .REST OF TODAY...Northeast winds 5 to 15 knots veering east in the afternoon. Waves 1 to 3 feet subsiding to calm to 2 feet. .TONIGHT...East winds 5 to 15 knots veering southeast after midnight. Waves calm to 2 feet. .TUESDAY...Southeast winds 5 to 15 knots becoming east 10 to 20 knots late. Waves calm to 2 feet. .TUESDAY NIGHT...East winds 5 to 15 knots veering west after midnight. A slight chance of showers through midnight. Waves calm to 2 feet. .WEDNESDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots by mid afternoon. Waves calm to 2 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest after midnight. Waves calm to 2 feet. .THURSDAY...North winds 5 to 15 knots veering southeast. Waves calm to 2 feet. .FRIDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet. $$ LSZ267-232145- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 943 AM EDT Mon Sep 23 2024 .REST OF TODAY...Northeast winds 10 to 20 knots diminishing to 5 to 15 knots in the afternoon, then backing north late. Waves 1 to 3 feet subsiding to calm to 2 feet. .TONIGHT...Northeast winds 5 to 15 knots becoming east 10 to 20 knots after midnight, then veering southeast late. Waves calm to 2 feet. .TUESDAY...Southeast winds 10 to 20 knots becoming east 5 to 15 knots in the afternoon. A slight chance of showers by mid afternoon. Waves calm to 2 feet. .TUESDAY NIGHT...East winds 10 to 20 knots becoming north 5 to 15 knots after midnight. A chance of showers. Waves calm to 2 feet. .WEDNESDAY...Northwest winds 10 to 20 knots backing west by mid afternoon. Waves calm to 2 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest after midnight. Waves calm to 2 feet. .THURSDAY...North winds 5 to 15 knots veering southeast. Waves calm to 2 feet. .FRIDAY...Southeast winds 5 to 15 knots increasing to 10 to 20 knots. Waves calm to 2 feet. $$ LSZ261-232145- MAFOR 2315/ Superior West 11400 11410 11210 11220 11320 11420 12410. Waves 1 foot or less this afternoon. Waves 1 to 3 feet tonight and Tuesday morning. Superior North Central 12300 11310 12320 11420 12410. Waves 1 foot or less this afternoon. Waves 1 to 3 feet tonight and Tuesday morning. Superior South Central 12200 11210 13310 11400 11300. Waves 1 to 2 feet. Superior East 11200 13100 11200 13310. Waves 2 feet or less. $$ LC Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes