Great Lakes Forecast
Issued by NWS
Issued by NWS
052 FZUS63 KMQT 260141 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 941 PM EDT Sat May 25 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 weak high pressure at 29.9 inches over the western Great Lakes continues to build into the rest of the Great Lakes region tonight before shifting east on Sunday as the next low pressure at 29.5 inches lifts northeast into southern Wisconsin. This low deepens to 29.4 inches as it tracks northeast across northern Lower Michigan Monday morning and then into northern Quebec by Tuesday morning. In its wake, a 30.2 inch high pressure builds over the Northern Plains on Tuesday. This high pressure parks over the Upper Great Lakes and builds to 30.3 inches by Wednesday, with the high staying put through Thursday. LSZ162-260945- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 941 PM EDT Sat May 25 2024 /841 PM CDT Sat May 25 2024/ .REST OF TONIGHT...Southwest winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Scattered rain showers and isolated thunderstorms. Waves 1 to 3 feet subsiding to calm to 2 feet. .SUNDAY...Northeast winds 5 to 15 knots increasing to 10 to 20 knots in the afternoon. A slight chance of rain showers. Waves calm to 2 feet. .SUNDAY NIGHT...Northeast winds 10 to 20 knots backing north after midnight. A slight chance of rain showers. Waves subsiding to calm to 2 feet. .MONDAY...West winds 10 to 20 knots. A slight chance of rain showers. A slight chance of thunderstorms by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...Northwest winds 10 to 20 knots increasing to 15 to 25 knots after midnight. Waves building to 1 to 3 feet. .TUESDAY...Northwest winds 15 to 25 knots. A chance of showers. Waves subsiding to calm to 2 feet. .TUESDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves calm to 2 feet. .WEDNESDAY...South winds 5 to 15 knots backing east. Waves calm to 2 feet. .THURSDAY...East winds 5 to 15 knots increasing to 10 to 20 knots. A chance of showers. Waves calm to 2 feet. $$ LSZ263-260945- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 941 PM EDT Sat May 25 2024 .REST OF TONIGHT...South winds 5 to 15 knots veering southwest after midnight. Scattered rain showers and isolated thunderstorms. Waves 1 to 3 feet subsiding to calm to 2 feet. .SUNDAY...Northeast winds 5 to 15 knots veering east late. A slight chance of rain showers. Waves calm to 2 feet. .SUNDAY NIGHT...Northeast winds 5 to 15 knots backing north late. A chance of rain showers. Waves 1 to 3 feet. .MONDAY...North winds 10 to 20 knots backing west by mid afternoon. A slight chance of rain showers. Waves 1 to 3 feet. .MONDAY NIGHT...Northwest winds 10 to 20 knots. Waves 1 to 3 feet. .TUESDAY...Northwest winds 10 to 20 knots. A chance of showers. Waves 1 to 3 feet. .TUESDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet. .WEDNESDAY...North winds 5 to 15 knots backing west. Waves calm to 2 feet. .THURSDAY...Southeast winds 5 to 15 knots veering south. Waves calm to 2 feet. $$ LSZ264-260945- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 941 PM EDT Sat May 25 2024 .REST OF TONIGHT...South winds 10 to 20 knots diminishing to 5 to 15 knots after midnight, then veering southwest late. Scattered rain showers. Isolated thunderstorms after midnight. Waves 2 to 4 feet subsiding to calm to 2 feet. .SUNDAY...Southwest winds less than 10 knots becoming east 5 to 15 knots in the afternoon. A slight chance of rain showers. Waves calm to 2 feet. .SUNDAY NIGHT...East winds 5 to 15 knots backing north late. A chance of rain showers. Waves building to 1 to 3 feet. .MONDAY...North winds 10 to 20 knots backing northwest by mid afternoon. A chance of showers. Waves building to 2 to 4 feet. .MONDAY NIGHT...Northwest winds 10 to 20 knots. Waves 2 to 4 feet. .TUESDAY...Northwest winds 10 to 20 knots. A chance of showers. Waves 2 to 4 feet. .TUESDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet. .WEDNESDAY...North winds 5 to 15 knots backing west. Waves subsiding to calm to 2 feet. .THURSDAY...Southeast winds 5 to 15 knots veering south. Waves calm to 2 feet. $$ LSZ265-260945- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 941 PM EDT Sat May 25 2024 .REST OF TONIGHT...Southeast winds 10 to 20 knots veering south after midnight, then diminishing to 5 to 15 knots late. Scattered showers by late evening. Waves calm to 2 feet. .SUNDAY...South winds 5 to 15 knots becoming east 10 to 20 knots in the afternoon. A slight chance of showers by mid afternoon. Waves calm to 2 feet. .SUNDAY NIGHT...Northeast winds 10 to 20 knots backing north late. Showers likely. Waves building to 1 to 3 feet. .MONDAY...North winds 15 to 25 knots backing northwest by mid afternoon. A chance of showers. Waves building to 2 to 4 feet. .MONDAY NIGHT...Northwest winds 15 to 25 knots. A chance of showers. Waves subsiding to 1 to 3 feet. .TUESDAY...Northwest winds 15 to 25 knots. A chance of showers. Waves 1 to 3 feet. .TUESDAY NIGHT...Northwest winds 10 to 20 knots veering north after midnight. Waves subsiding to calm to 2 feet. .WEDNESDAY...North winds 10 to 20 knots becoming west 5 to 15 knots. Waves calm to 2 feet. .THURSDAY...Southeast winds 5 to 15 knots becoming south 10 to 20 knots. Waves calm to 2 feet. $$ LSZ266-260945- 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- 941 PM EDT Sat May 25 2024 .REST OF TONIGHT...Southeast winds 10 to 20 knots veering south after midnight. Scattered showers. Isolated thunderstorms after midnight. Waves 2 to 4 feet subsiding to calm to 2 feet. .SUNDAY...South winds 5 to 15 knots becoming southeast 10 to 20 knots in the afternoon, then backing east late. A slight chance of rain showers by mid afternoon. Waves calm to 2 feet. .SUNDAY NIGHT...East winds 10 to 20 knots becoming northeast 15 to 25 knots after midnight. Showers likely. Waves building to 2 to 4 feet. .MONDAY...North winds 15 to 25 knots becoming northwest 20 to 30 knots by mid afternoon. A chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet. .MONDAY NIGHT...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. A chance of showers. Waves building to 3 to 6 feet occasionally to 8 feet. .TUESDAY...Northwest winds 15 to 25 knots. A chance of showers. Waves 3 to 5 feet occasionally to 7 feet. .TUESDAY NIGHT...Northwest winds 15 to 25 knots becoming north 10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet. .WEDNESDAY...Northwest winds 10 to 20 knots diminishing to 5 to 15 knots. Waves subsiding to calm to 2 feet. .THURSDAY...Southeast winds 5 to 15 knots becoming south 10 to 20 knots. Waves calm to 2 feet. $$ LSZ267-260945- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 941 PM EDT Sat May 25 2024 .REST OF TONIGHT...Southeast winds 10 to 20 knots veering south after midnight. Isolated showers by late evening. Waves calm to 2 feet. .SUNDAY...South winds 10 to 20 knots backing east late. Waves building to 1 to 3 feet. .SUNDAY NIGHT...East winds 10 to 20 knots backing northeast after midnight, then increasing to 15 to 25 knots late. Showers likely. A slight chance of thunderstorms after midnight. Waves building to 2 to 4 feet. .MONDAY...Northeast winds 15 to 25 knots backing north by mid afternoon. Showers likely and a slight chance of thunderstorms. Waves building to 3 to 5 feet occasionally to 7 feet. .MONDAY NIGHT...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. A chance of showers. Waves building to 3 to 6 feet occasionally to 8 feet. .TUESDAY...Northwest winds 15 to 25 knots. A chance of showers. Waves 3 to 5 feet occasionally to 7 feet. .TUESDAY NIGHT...Northwest winds 15 to 25 knots becoming north 10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet. .WEDNESDAY...Northwest winds 10 to 20 knots diminishing to 5 to 15 knots. Waves subsiding to calm to 2 feet. .THURSDAY...West winds 5 to 15 knots becoming south 10 to 20 knots. Waves calm to 2 feet. $$ LSZ261-260945- MAFOR 2603/ Superior West 12510 19516 11600 19606 11100 14110. Waves 1 to 3 feet. Superior North Central 11420 19426 11410 11500 11400 11300 13210. Waves 2 to 4 feet subsiding to 1 to 3 feet overnight. Waves 1 to 3 feet Sunday and Sunday evening. Superior South Central 11310 19316 13410 11310 12210 11116. Waves 1 to 2 feet. Superior East 11310 13410 11300 12210 11226. Waves 1 to 3 feet. $$ TAP Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes