Expires:202101172300;;058994 FZUS63 KMQT 171456 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 956 AM EST Sun Jan 17 2021 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 29.9 inch surface trough will linger over Lake Superior through Monday. On Monday night, a weak 29.8 inch low will develop over eastern Lake Superior. A 30.2 inch low over North Dakota Tuesday morning will drop southeast into the upper Mississippi River Valley on Tuesday evening. A broad 29.2 inch low over northern Saskatchewan Wednesday morning will move southeast into Ontario by Thursday while weakening to 29.4 inches. LSZ266-172300- 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- 956 AM EST Sun Jan 17 2021 .REST OF TODAY...Northeast winds 15 to 25 knots diminishing to 10 to 20 knots by late morning, then backing north by mid afternoon. Scattered snow showers. Waves 2 to 4 feet subsiding to 1 to 3 feet. .TONIGHT...Northeast winds 10 to 20 knots diminishing to 5 to 15 knots by midnight, then veering east late. Scattered snow showers. Waves subsiding to calm to 2 feet. .MONDAY...East winds 5 to 15 knots veering south by mid afternoon. A chance of snow showers. Waves building to 1 to 3 feet. .MONDAY NIGHT...North winds 10 to 20 knots becoming northwest 20 to 30 knots after midnight. Snow showers likely. Freezing spray after midnight. Waves building to 3 to 6 feet occasionally to 8 feet. .TUESDAY...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots in the afternoon. Freezing spray. Snow showers likely. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .TUESDAY NIGHT...Northwest winds 15 to 25 knots becoming west 10 to 20 knots after midnight. Freezing spray. A chance of snow showers. Waves subsiding to 2 to 4 feet. .WEDNESDAY...South winds 20 to 30 knots veering southwest. A chance of snow showers. Waves building to 5 to 9 feet occasionally to 11 feet. .THURSDAY...West winds 20 to 30 knots veering northwest. A chance of snow showers, then snow showers likely. Freezing spray. Waves building to 6 to 10 feet occasionally to 13 feet. $$