Great Lakes Forecast
Issued by NWS
Issued by NWS
957 FZUS63 KMQT 240135 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 935 PM 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 this evening. 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 into Saturday. LSZ162-240945- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 935 PM EDT Mon Sep 23 2024 /835 PM CDT Mon Sep 23 2024/ .REST OF TONIGHT...East winds 10 to 20 knots becoming south 5 to 15 knots after midnight. Waves calm to 2 feet 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 backing northwest after midnight, then backing west late. 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. Waves calm to 2 feet. .THURSDAY...Southwest winds 5 to 15 knots backing east by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...East winds 5 to 15 knots veering southwest after midnight. Waves calm to 2 feet. .FRIDAY...Southwest winds 5 to 15 knots backing northeast. Waves calm to 2 feet. .SATURDAY...East winds 5 to 15 knots becoming northeast 10 to 20 knots. Waves calm to 2 feet. $$ LSZ263-240945- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 935 PM EDT Mon Sep 23 2024 .REST OF TONIGHT...Southeast winds 10 to 20 knots veering south late. Waves 1 to 3 feet building to 2 to 4 feet, then subsiding to 1 to 3 feet. .TUESDAY...South winds 5 to 15 knots backing northeast late. Waves subsiding to calm to 2 feet. .TUESDAY NIGHT...Southeast winds 5 to 15 knots veering southwest after midnight, then veering west late. Waves calm to 2 feet. .WEDNESDAY...West winds 10 to 20 knots backing southwest by mid afternoon. Waves calm to 2 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet. .THURSDAY...Southwest winds 5 to 15 knots backing south by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...Southeast winds 5 to 15 knots veering south after midnight. Waves calm to 2 feet. .FRIDAY...Southwest winds 5 to 15 knots backing southeast. Waves calm to 2 feet. .SATURDAY...East winds 5 to 15 knots. Waves calm to 2 feet. $$ LSZ264-240945- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 935 PM EDT Mon Sep 23 2024 .REST OF TONIGHT...Southeast winds 5 to 15 knots veering south late. Waves calm to 2 feet 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 south after midnight, then veering west late. 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...South winds 5 to 15 knots. Waves calm to 2 feet. .THURSDAY NIGHT...Southeast winds 5 to 15 knots veering south after midnight. Waves calm to 2 feet. .FRIDAY...South winds 5 to 15 knots backing southeast. Waves calm to 2 feet. .SATURDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet. $$ LSZ265-240945- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 935 PM EDT Mon Sep 23 2024 .REST OF TONIGHT...Southeast winds 10 to 20 knots becoming south 5 to 15 knots late. Waves calm to 2 feet. .TUESDAY...Southeast winds 5 to 15 knots increasing to 10 to 20 knots in the afternoon, then backing east late. Waves calm to 2 feet. .TUESDAY NIGHT...Southeast winds 5 to 15 knots veering southwest after midnight, then veering west late. Waves calm to 2 feet. .WEDNESDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots by mid afternoon. Waves calm to 2 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet. .THURSDAY...West winds 5 to 15 knots backing southeast by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...Southeast winds 5 to 15 knots veering south after midnight. Waves calm to 2 feet. .FRIDAY...East winds 5 to 15 knots veering southeast. Waves calm to 2 feet. .SATURDAY...East winds 5 to 15 knots veering southeast. Waves calm to 2 feet. $$ LSZ266-240945- 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- 935 PM EDT Mon Sep 23 2024 .REST OF TONIGHT...East winds 10 to 20 knots becoming southeast 5 to 15 knots 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 backing north after midnight, then backing northwest late. Waves calm to 2 feet. .WEDNESDAY...Northwest winds 10 to 20 knots becoming west 5 to 15 knots by mid afternoon. Waves calm to 2 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet. .THURSDAY...Northwest winds 5 to 15 knots backing south by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...Southeast winds 5 to 15 knots veering south after midnight. Waves calm to 2 feet. .FRIDAY...South winds 5 to 15 knots backing southeast. Waves calm to 2 feet. .SATURDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet. $$ LSZ267-240945- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 935 PM EDT Mon Sep 23 2024 .REST OF TONIGHT...East winds 10 to 20 knots veering southeast late. Waves calm to 2 feet. .TUESDAY...Southeast winds 10 to 20 knots becoming east 5 to 15 knots in the afternoon. A slight chance of showers by mid afternoon. Waves calm to 2 feet. .TUESDAY NIGHT...East winds 10 to 20 knots becoming north 5 to 15 knots after midnight, then becoming northwest 10 to 20 knots late. A slight chance of showers. Waves calm to 2 feet. .WEDNESDAY...Northwest winds 10 to 20 knots backing west by mid afternoon. Waves calm to 2 feet. .WEDNESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet. .THURSDAY...Northwest winds 5 to 15 knots veering north by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...Southeast winds 5 to 15 knots. Waves calm to 2 feet. .FRIDAY...Southeast winds 5 to 15 knots increasing to 10 to 20 knots. Waves calm to 2 feet. .SATURDAY...Southeast winds 10 to 20 knots. Waves calm to 2 feet. $$ LSZ261-240945- MAFOR 2403/ Superior West 11320 11420 12410 11400 11300 12200. Waves 1 to 3 feet subsiding to 1 foot or less overnight and Tuesday. Waves 1 foot or less Tuesday evening. Superior North Central 11320 11420 12410 13310 11300. Waves 1 to 3 feet. Superior South Central 12310 11400 11300 12310 11210 11200. Waves 1 to 2 feet. Superior East 11200 14310 13200. Waves 2 feet or less. $$ BW Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes