Great Lakes Forecast
Issued by NWS
Issued by NWS
383 FZUS63 KMQT 230232 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 932 PM EST Fri Nov 22 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...Tonight and Saturday, a 29.6 inch trough will develop and stretch from the Mid-Atlantic States to James Bay while a 30.1 inch ridge over the Plains States drifts to the Mississippi Valley. The ridge will weaken further to 30.0 inches as it shifts across the Upper Great Lakes Saturday night and early Sunday. A 29.7 inch low developing over Colorado and Kansas on Sunday will then lift northeast, reaching the Upper Great Lakes on Monday. As the low deepens to 29.5 inches while tracking to southern Quebec on Tuesday, 30.3 inch high pressure will build southeast into the Middle Mississippi River Valley. The low will continue to track to the north Tuesday night and Wednesday as the 30.2 inch high pushes into the Ohio River Valley. LSZ162-231045- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 932 PM EST Fri Nov 22 2024 /832 PM CST Fri Nov 22 2024/ .REST OF TONIGHT...Northwest winds 10 to 20 knots. Waves calm to 2 feet. .SATURDAY...Northwest winds 10 to 20 knots. Waves calm to 2 feet. .SATURDAY NIGHT...North winds 10 to 20 knots veering east late. Waves calm to 2 feet. .SUNDAY...East winds 10 to 20 knots increasing to 15 to 25 knots in the afternoon. A slight chance of rain and snow showers in the afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .SUNDAY NIGHT...East winds 10 to 20 knots backing northeast after midnight. A chance of rain showers, possibly mixed with snow in the evening, then rain and snow showers likely after midnight. Waves 1 to 3 feet. .MONDAY...Northeast winds 15 to 25 knots backing north in the afternoon. Snow showers. Waves building to 2 to 4 feet. .MONDAY NIGHT...Northwest winds 15 to 25 knots. Snow showers likely in the evening, then a chance of snow showers after midnight. Waves 2 to 4 feet. .TUESDAY...Northwest winds 10 to 20 knots diminishing to 5 to 15 knots. A chance of snow showers. Waves subsiding to calm to 2 feet. .WEDNESDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet. $$ LSZ263-231045- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 932 PM EST Fri Nov 22 2024 .REST OF TONIGHT...Northwest winds 5 to 15 knots increasing to 10 to 20 knots late. Waves 1 to 3 feet building to 2 to 4 feet. .SATURDAY...Northwest winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .SATURDAY NIGHT...North winds 5 to 15 knots veering northeast late. Waves calm to 2 feet. .SUNDAY...East winds 5 to 15 knots increasing to 10 to 20 knots in the afternoon. Waves building to 1 to 3 feet. .SUNDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. A chance of rain and snow showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .MONDAY...Northeast winds 10 to 20 knots backing north in the afternoon. Rain showers likely in the morning. Snow showers. Waves building to 2 to 4 feet. .MONDAY NIGHT...North winds 10 to 20 knots becoming northwest 15 to 25 knots after midnight. Snow showers likely in the evening. A chance of snow showers after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .TUESDAY...Northwest winds 15 to 25 knots diminishing to 5 to 15 knots. A chance of snow showers. Waves subsiding to calm to 2 feet. .WEDNESDAY...Northwest winds 5 to 15 knots veering north. Waves calm to 2 feet. $$ LSZ264-231045- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 932 PM EST Fri Nov 22 2024 .REST OF TONIGHT...Northwest winds 10 to 20 knots. Waves 2 to 4 feet building to 3 to 5 feet occasionally to 7 feet. .SATURDAY...Northwest winds 10 to 20 knots. Waves subsiding to 1 to 3 feet. .SATURDAY NIGHT...Northwest winds 10 to 20 knots becoming north 5 to 15 knots by midnight. Waves subsiding to calm to 2 feet. .SUNDAY...Northeast winds 5 to 15 knots veering east in the afternoon. Waves calm to 2 feet. .SUNDAY NIGHT...East winds 5 to 15 knots. A chance of rain showers. A chance of snow showers after midnight. Waves building to 1 to 3 feet. .MONDAY...Northeast winds 10 to 20 knots backing north in the afternoon. Rain showers likely in the morning. Snow showers likely. Waves building to 2 to 4 feet. .MONDAY NIGHT...North winds 10 to 20 knots increasing to 15 to 25 knots after midnight. Snow showers in the evening. A chance of snow showers after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .TUESDAY...Northwest winds 15 to 25 knots diminishing to 10 to 20 knots. A chance of snow showers. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 1 to 3 feet. .WEDNESDAY...Northwest winds 5 to 15 knots veering north. Waves subsiding to calm to 2 feet. $$ LSZ265-231045- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 932 PM EST Fri Nov 22 2024 .REST OF TONIGHT...Northwest winds 15 to 25 knots. A slight chance of rain showers late in the evening. Waves 3 to 5 feet occasionally to 7 feet. .SATURDAY...Northwest winds 15 to 25 knots. A slight chance of rain showers. A slight chance of snow showers in the afternoon. Waves subsiding to 2 to 4 feet. .SATURDAY NIGHT...Northwest winds 15 to 25 knots becoming north 10 to 20 knots by midnight. A slight chance of rain and snow showers in the evening. Waves subsiding to calm to 2 feet. .SUNDAY...Northeast winds 5 to 15 knots becoming east 10 to 20 knots in the afternoon. Waves calm to 2 feet. .SUNDAY NIGHT...East winds 10 to 20 knots. A chance of rain showers. Waves calm to 2 feet. .MONDAY...Northeast winds 10 to 20 knots becoming north 15 to 25 knots in the afternoon. Rain and snow showers. Waves building to 1 to 3 feet. .MONDAY NIGHT...North winds 15 to 25 knots. Rain showers in the evening. Snow showers. Waves building to 2 to 4 feet. .TUESDAY...Northwest winds 15 to 25 knots diminishing to 10 to 20 knots. Snow showers likely. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to calm to 2 feet. .WEDNESDAY...Northwest winds 10 to 20 knots. A chance of snow showers. Waves calm to 2 feet. $$ LSZ266-231045- 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- 932 PM EST Fri Nov 22 2024 .REST OF TONIGHT...Northwest winds 15 to 25 knots. A slight chance of rain showers. Waves 4 to 7 feet occasionally to 9 feet subsiding to 3 to 6 feet occasionally to 8 feet. .SATURDAY...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots. A slight chance of rain showers. A slight chance of snow showers in the afternoon. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .SATURDAY NIGHT...Northwest winds 15 to 25 knots veering north by midnight, then diminishing to 10 to 20 knots late. A slight chance of rain showers in the evening. A slight chance of snow showers. Waves subsiding to 2 to 4 feet. .SUNDAY...North winds 5 to 15 knots becoming northeast 10 to 20 knots in the afternoon. Waves subsiding to calm to 2 feet. .SUNDAY NIGHT...East winds 10 to 20 knots. A chance of rain showers. Waves calm to 2 feet. .MONDAY...Northeast winds 10 to 20 knots backing north in the afternoon. Rain showers. Snow showers in the afternoon. Waves building to 1 to 3 feet. .MONDAY NIGHT...North winds 15 to 25 knots. Rain showers in the evening. Snow showers. Waves building to 3 to 5 feet occasionally to 7 feet. .TUESDAY...Northwest winds 15 to 25 knots diminishing to 10 to 20 knots. Snow showers. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. .WEDNESDAY...Northwest winds 10 to 20 knots veering north. Snow showers likely, then a chance of snow showers. Waves subsiding to calm to 2 feet. $$ LSZ267-231045- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 932 PM EST Fri Nov 22 2024 .REST OF TONIGHT...Northwest winds 15 to 25 knots. A slight chance of rain showers. Waves 3 to 6 feet occasionally to 8 feet. .SATURDAY...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots by mid afternoon. A chance of rain showers. A slight chance of snow showers in the afternoon. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet occasionally to 7 feet. .SATURDAY NIGHT...Northwest winds 15 to 25 knots becoming north 10 to 20 knots late. A slight chance of rain showers in the evening. A slight chance of snow showers. Waves subsiding to 2 to 4 feet. .SUNDAY...North winds 5 to 15 knots increasing to 10 to 20 knots in the afternoon. Waves subsiding to calm to 2 feet. .SUNDAY NIGHT...East winds 10 to 20 knots. A chance of rain showers. Waves calm to 2 feet. .MONDAY...East winds 10 to 20 knots backing northeast in the afternoon. Rain showers. Snow showers in the afternoon. Waves building to 1 to 3 feet. .MONDAY NIGHT...Northeast winds 10 to 20 knots becoming north 15 to 25 knots after midnight. Rain showers in the evening. Snow showers. Waves building to 2 to 4 feet. .TUESDAY...Northwest winds 15 to 25 knots. Snow showers. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. .WEDNESDAY...Northwest winds 10 to 20 knots veering north. Snow showers likely, then a chance of snow showers. Waves subsiding to calm to 2 feet. $$ LSZ261-231045- MAFOR 2304/ Superior West 11710 13720 13710 11810. Waves 1 to 3 feet. Superior North Central 12720 11730 14720 11720. Waves 2 to 4 feet building to 3 to 5 feet overnight. Waves 3 to 5 feet subsiding to 2 to 4 feet Saturday. Waves 2 to 3 feet Saturday evening. Superior South Central 12720 12730 14720. Waves 3 to 5 feet overnight. Waves 3 to 6 feet subsiding to 2 to 4 feet Saturday. Waves 2 to 4 feet Saturday evening. Superior East 11720 15730 11730. A chance of rain showers Saturday afternoon. Waves 3 to 6 feet. $$ RM Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes