Great Lakes Forecast
Issued by NWS
Issued by NWS
595 FZUS63 KMQT 242043 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 343 PM EST Sun Nov 24 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 30.0 inch high pressure ridge extending from northern Manitoba across Lake Superior to the Ohio River Valley will shift east, reaching the Lower Great Lakes this evening. Meanwhile, a 29.7 inch low pressure developing over the Southern Plains today will lift northeast, crossing the Great Lakes region during Monday and Monday night. As the low deepens to 29.5 inches while tracking to southern Quebec on Tuesday, a 30.3 inch ridge will build southeast to the Middle Mississippi River Valley. The low will drift north over Quebec during Tuesday night and Wednesday as the ridge weakens to 30.1 inches while drifting east and approaching the Upper Great Lakes. On Thursday, the low, at a pressure of 29.7 inches, will spin near James Bay while a ridge of 30.5 inches builds southeast into the Plains. 30.2 inch high pressure nudges into far western Lake Superior Friday. LSZ162-250445- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 343 PM EST Sun Nov 24 2024 /243 PM CST Sun Nov 24 2024/ .LATE THIS AFTERNOON...East winds 15 to 25 knots. Waves 2 to 4 feet. .TONIGHT...East winds 15 to 25 knots diminishing to 10 to 20 knots late. A slight chance of snow in the evening. A slight chance of rain. Snow after midnight. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .MONDAY...East winds 10 to 20 knots backing north by mid afternoon. Snow, possibly mixed with rain. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. .MONDAY NIGHT...North winds 15 to 25 knots backing northwest by midnight, then increasing to 20 to 30 knots late. A slight chance of rain showers in the evening. A chance of snow showers. Waves building to 3 to 6 feet occasionally to 8 feet. .TUESDAY...Northwest winds 15 to 25 knots. A slight chance of snow showers. Waves subsiding to 1 to 3 feet. .TUESDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .WEDNESDAY...Northwest winds 10 to 20 knots. Waves calm to 2 feet. .WEDNESDAY NIGHT...Northwest winds 10 to 20 knots. Waves calm to 2 feet. .THURSDAY...Northwest winds 10 to 20 knots increasing to 15 to 25 knots. A chance of snow showers. Waves building to 1 to 3 feet. .FRIDAY...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots. A chance of snow showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. $$ LSZ263-250445- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 343 PM EST Sun Nov 24 2024 .LATE THIS AFTERNOON...East winds 10 to 20 knots. Waves 1 to 3 feet. .TONIGHT...East winds 10 to 20 knots diminishing to 5 to 15 knots late. A chance of snow, possibly mixed with rain after midnight. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .MONDAY...East winds 10 to 20 knots becoming northeast 5 to 15 knots by mid afternoon. Snow, possibly mixed with rain. Waves building to 2 to 4 feet. .MONDAY NIGHT...North winds 15 to 25 knots becoming northwest 20 to 30 knots late. Snow showers likely, possibly mixed with rain showers in the evening, then a chance of snow showers after midnight. Waves subsiding to 1 to 3 feet, then building to 5 to 8 feet occasionally to 10 feet. .TUESDAY...Northwest winds 15 to 25 knots. A chance of snow showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .TUESDAY NIGHT...Northwest winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. A chance of snow showers. Waves subsiding to calm to 2 feet. .WEDNESDAY...Northwest winds 5 to 15 knots increasing to 10 to 20 knots in the afternoon. Waves calm to 2 feet. .WEDNESDAY NIGHT...Northwest winds 10 to 20 knots diminishing to 5 to 15 knots after midnight. Waves calm to 2 feet. .THURSDAY...Northwest winds 10 to 20 knots. A chance of snow showers. Waves building to 2 to 4 feet. .FRIDAY...Northwest winds 15 to 25 knots. A chance of snow showers. Waves building to 3 to 6 feet occasionally to 8 feet. $$ LSZ264-250445- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 343 PM EST Sun Nov 24 2024 .LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Waves calm to 2 feet. .TONIGHT...East winds 5 to 15 knots. A chance of snow after midnight. Waves building to 1 to 3 feet. .MONDAY...East winds 10 to 20 knots diminishing to 5 to 15 knots by mid afternoon. Snow, possibly mixed with rain. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .MONDAY NIGHT...Northeast winds 5 to 15 knots becoming north 10 to 20 knots by midnight, then increasing to 15 to 25 knots late. Snow showers likely. Waves building to 3 to 6 feet occasionally to 8 feet. .TUESDAY...Northwest winds 15 to 25 knots. Snow showers likely in the morning, then a chance of snow showers in the afternoon. Waves 3 to 6 feet occasionally to 8 feet. .TUESDAY NIGHT...Northwest winds 10 to 20 knots. A chance of snow showers. Waves subsiding to 2 to 4 feet. .WEDNESDAY...Northwest winds 10 to 20 knots. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...Northwest winds 10 to 20 knots. A chance of snow showers. Waves calm to 2 feet. .THURSDAY...Northwest winds 10 to 20 knots. A chance of snow showers. Waves building to 1 to 3 feet. .FRIDAY...Northwest winds 15 to 25 knots. A chance of snow showers. Waves building to 3 to 6 feet occasionally to 8 feet. $$ LSZ265-250445- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 343 PM EST Sun Nov 24 2024 .LATE THIS AFTERNOON...Northeast winds 10 to 20 knots. Waves calm to 2 feet. .TONIGHT...East winds 10 to 20 knots. A chance of rain and snow after midnight. Waves calm to 2 feet. .MONDAY...East winds 10 to 20 knots. A slight chance of rain in the morning. Snow. Rain in the afternoon. Waves building to 2 to 4 feet. .MONDAY NIGHT...Northeast winds 10 to 20 knots backing northwest by midnight, then increasing to 20 to 30 knots late. Snow showers likely, possibly mixed with rain showers. Waves subsiding to 1 to 3 feet, then building to 3 to 6 feet occasionally to 8 feet. .TUESDAY...Northwest winds 20 to 30 knots. A slight chance of rain showers in the morning. Snow showers. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .TUESDAY NIGHT...Northwest winds 15 to 25 knots. Snow showers. Waves subsiding to 1 to 3 feet. .WEDNESDAY...Northwest winds 10 to 20 knots. A chance of snow showers. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...Northwest winds 10 to 20 knots. Snow showers likely. Waves calm to 2 feet. .THURSDAY...Northwest winds 15 to 25 knots. Snow showers. Waves calm to 2 feet. .FRIDAY...Northwest winds 20 to 30 knots. Snow showers likely. Waves building to 2 to 4 feet. $$ LSZ266-250445- 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- 343 PM EST Sun Nov 24 2024 .LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Waves calm to 2 feet. .TONIGHT...Northeast winds 5 to 15 knots becoming east 10 to 20 knots by midnight. A chance of snow, possibly mixed with rain after midnight. Waves calm to 2 feet. .MONDAY...East winds 10 to 20 knots increasing to 15 to 25 knots. Snow, possibly mixed with rain. Waves building to 2 to 4 feet. .MONDAY NIGHT...Northeast winds 10 to 20 knots backing north by midnight, then becoming northwest 15 to 25 knots late. Rain showers in the evening. Snow showers. A slight chance of rain showers after midnight. Waves subsiding to 1 to 3 feet, then building to 3 to 6 feet occasionally to 8 feet. .TUESDAY...Northwest winds 20 to 30 knots. Snow showers, possibly mixed with rain. Waves building to 6 to 10 feet occasionally to 13 feet. .TUESDAY NIGHT...Northwest winds 15 to 25 knots. Snow showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY...Northwest winds 15 to 25 knots. Snow showers likely. Waves subsiding to 1 to 3 feet. .WEDNESDAY NIGHT...Northwest winds 15 to 25 knots. Snow showers. Waves subsiding to calm to 2 feet. .THURSDAY...Northwest winds 15 to 25 knots. Snow showers. Waves building to 1 to 3 feet. .FRIDAY...Northwest winds 20 to 30 knots. Snow showers. Waves building to 4 to 7 feet occasionally to 9 feet. $$ LSZ267-250445- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 343 PM EST Sun Nov 24 2024 .LATE THIS AFTERNOON...North winds 5 to 15 knots. Waves calm to 2 feet. .TONIGHT...Northeast winds 10 to 20 knots veering east by midnight. A slight chance of rain and snow after midnight. Waves calm to 2 feet. .MONDAY...East winds 10 to 20 knots increasing to 15 to 25 knots. Snow. A slight chance of rain in the afternoon. Waves building to 1 to 3 feet. .MONDAY NIGHT...East winds 10 to 20 knots backing north by midnight, then backing northwest late. Snow showers, possibly mixed with rain. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .TUESDAY...Northwest winds 15 to 25 knots increasing to 20 to 30 knots in the afternoon. Snow showers, possibly mixed with rain. Waves building to 6 to 9 feet occasionally to 11 feet. .TUESDAY NIGHT...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. Snow showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY...Northwest winds 15 to 25 knots. Snow showers likely. Waves subsiding to 1 to 3 feet. .WEDNESDAY NIGHT...Northwest winds 15 to 25 knots. Snow showers. Waves subsiding to calm to 2 feet. .THURSDAY...Northwest winds 15 to 25 knots. Snow showers. Waves building to 1 to 3 feet. .FRIDAY...Northwest winds 15 to 25 knots. Snow showers. Waves building to 4 to 7 feet occasionally to 9 feet. $$ LSZ261-250445- MAFOR 2422/ Superior West 12230 12220 12227 11117 11127. A chance of rain overnight. Waves 2 to 4 feet. Superior North Central 11110 13210 12220 12227. Waves 1 to 3 feet tonight building to 2 to 4 feet Monday. Superior South Central 11110 14210 13227. Waves 1 to 2 feet tonight building to 2 to 4 feet Monday. Superior East 11100 11110 13210 11220 12227. Waves 1 to 3 feet. $$ BW Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes