FZUS63 KMQT 120815
GLFLS
Experimental Tabular Open Lake Forecast for Lake Superior
National Weather Service Negaunee MI
415 AM EDT Thu Jun 12 2025
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...Throughout this morning, a 30.3 inch high over northern Manitoba
shifts to northern Ontario, extending 30.2 inch ridging over Lake
Superior. The high reaches James Bay by Friday afternoon,
maintaining strength with 30.2 ridging remaining over the lake
through the weekend. Monday, high pressure shifts east of the Great
Lakes while a broad low pressure of 29.7 inches moves over the
Plains, with the low arriving over the Great Lakes late Monday into
early Tuesday morning.
LSZ162-122000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 AM EDT Thu Jun 12 2025 /301 AM CDT Thu Jun 12 2025/
.EARLY THIS MORNING, Northeast winds 10 to 20 knots. Waves calm
to 2 feet.
.TODAY, Northeast winds 10 to 20 knots. Waves building to 2 to
4 feet.
.TONIGHT, Northeast winds 10 to 20 knots veering east late. A
chance of showers. Waves 2 to 4 feet.
.FRIDAY, East winds 10 to 20 knots becoming northeast 15 to
25 knots in the afternoon. Showers likely through early
afternoon, then a chance of showers by mid afternoon. Waves
building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT, Northeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. A chance of showers. Waves
subsiding to 1 to 3 feet.
.SATURDAY, Northeast winds 10 to 20 knots. A chance of showers.
Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT, Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.SUNDAY, East winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.MONDAY, East winds 5 to 15 knots. A chance of showers and
thunderstorms. Waves calm to 2 feet.
LSZ162-121400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
415 AM EDT Thu Jun 12 2025 /315 AM CDT Thu Jun 12 2025/
.Today...
Weather.............Mostly sunny.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
.TONIGHT...
Weather.............Mostly cloudy with a slight chance of showers,
then mostly cloudy with chance of showers after
midnight.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
.FRIDAY...
Weather.............Showers likely, then mostly cloudy with chance
of showers in the afternoon.
Sfc winds...........Northeast 15 to 20 knots.
100-ft winds........Northeast 20 to 25 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 8 feet.
.FRIDAY NIGHT...
Weather.............Mostly cloudy with chance of showers.
Sfc winds...........Northeast 15 to 20 knots.
100-ft winds........Northeast 20 to 25 knots.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 8 feet.
.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...Chance of showers. slight chance of showers.
Northeast winds 5 to 10 knots. Waves 2 to 4 feet.
.SUNDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
.MONDAY...Chance of showers. North winds 5 to 10 knots. Waves
1 to 3 feet.
$$
LSZ263-121400-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
415 AM EDT Thu Jun 12 2025
.Today...
Weather.............Mostly sunny.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet building to 3 to 5 feet in the
afternoon.
Ocnl waves..........Around 6 feet in the afternoon.
.TONIGHT...
Weather.............Mostly cloudy, then chance of showers after
midnight.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........3 to 5 feet subsiding to 2 to 4 feet after
midnight.
Ocnl waves..........Around 6 feet in the evening.
.FRIDAY...
Weather.............Partly sunny with chance of showers.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet in the afternoon.
.FRIDAY NIGHT...
Weather.............Mostly cloudy with chance of showers.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........3 to 5 feet subsiding to 2 to 4 feet after
midnight.
Ocnl waves..........Around 5 feet.
.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...Chance of showers. slight chance of showers.
Northeast winds 5 to 10 knots. Waves 2 to 4 feet.
.SUNDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
.MONDAY...Chance of showers. North winds 5 to 10 knots. Waves
1 to 3 feet.
$$
LSZ264-121400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
415 AM EDT Thu Jun 12 2025
.Today...
Weather.............Sunny.
Sfc winds...........North 5 to 10 knots.
100-ft winds........North 10 to 15 knots.
Sig waves...........2 to 4 feet.
.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........East 5 to 10 knots.
100-ft winds........East 10 to 15 knots.
Sig waves...........1 to 3 feet.
.FRIDAY...
Weather.............Partly sunny with chance of showers.
Sfc winds...........East 5 to 10 knots.
100-ft winds........East 10 to 15 knots.
Sig waves...........1 to 3 feet.
.FRIDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........East 5 to 10 knots.
100-ft winds........East 10 to 15 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...Chance of showers. slight chance of showers.
Northeast winds 5 to 10 knots. Waves 2 to 4 feet.
.SUNDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
.MONDAY...Chance of showers. North winds 5 to 10 knots. Waves
1 to 3 feet.
$$
LSZ265-121400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
415 AM EDT Thu Jun 12 2025
.Today...
Weather.............Sunny.
Sfc winds...........North 5 to 10 knots.
100-ft winds........North 10 to 15 knots.
Sig waves...........1 to 3 feet.
.TONIGHT...
Weather.............Mostly cloudy, then slight chance of showers
after midnight.
Sfc winds...........Light and variable winds becoming east 5 to 10
knots after midnight.
100-ft winds........Light and variable winds becoming east 10 to 15
knots after midnight.
Sig waves...........1 to 3 feet.
.FRIDAY...
Weather.............Showers likely, then mostly cloudy with chance
of showers in the afternoon.
Sfc winds...........East 5 to 10 knots.
100-ft winds........East 10 to 15 knots.
Sig waves...........1 to 3 feet.
.FRIDAY NIGHT...
Weather.............Mostly cloudy with chance of showers.
Sfc winds...........East 5 to 10 knots.
100-ft winds........East 10 to 15 knots.
Sig waves...........1 to 3 feet.
.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...Chance of showers. slight chance of showers.
Northeast winds 5 to 10 knots. Waves 2 to 4 feet.
.SUNDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
.MONDAY...Chance of showers. North winds 5 to 10 knots. Waves
1 to 3 feet.
$$
LSZ266-121400-
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-
415 AM EDT Thu Jun 12 2025
.Today...
Weather.............Sunny.
Sfc winds...........North 5 to 10 knots.
100-ft winds........North 10 to 15 knots.
Sig waves...........2 to 4 feet.
.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........North 5 to 10 knots.
100-ft winds........North 10 to 15 knots.
Sig waves...........1 to 3 feet.
.FRIDAY...
Weather.............Partly sunny with chance of showers.
Sfc winds...........East 5 to 10 knots.
100-ft winds........East 10 to 15 knots.
Sig waves...........1 to 3 feet.
.FRIDAY NIGHT...
Weather.............Mostly cloudy with chance of showers.
Sfc winds...........East 5 to 10 knots.
100-ft winds........East 10 to 15 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...Chance of showers. slight chance of showers.
Northeast winds 5 to 10 knots. Waves 2 to 4 feet.
.SUNDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
.MONDAY...Chance of showers. North winds 5 to 10 knots. Waves
1 to 3 feet.
$$
LSZ267-121400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
415 AM EDT Thu Jun 12 2025
.Today...
Weather.............Sunny.
Sfc winds...........Northwest 5 to 10 knots.
100-ft winds........Northwest 10 to 15 knots.
Sig waves...........2 to 4 feet.
.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northwest 5 to 10 knots.
100-ft winds........Northwest 10 to 15 knots.
Sig waves...........2 to 4 feet.
.FRIDAY...
Weather.............Partly sunny with chance of showers.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........1 to 3 feet.
.FRIDAY NIGHT...
Weather.............Mostly cloudy with chance of showers.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........1 to 3 feet.
.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...Chance of showers. slight chance of showers.
Northeast winds 5 to 10 knots. Waves 2 to 4 feet.
.SUNDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
.MONDAY...Chance of showers. North winds 5 to 10 knots. Waves
1 to 3 feet.
$$
LSZ261-121400-
MAFOR 1209/
Superior West 11210 14110 11110 12210. A chance of showers
overnight. Waves 1 to 3 feet.
Superior North Central 12800 11100 11200 11300 11400 11300 11200.
Waves 2 feet or less.
Superior South Central 12800 12100 11200 11400 11300 11200. Waves
1 foot or less.
Superior East 13800 13700 11800 11100. Waves 1 to 2 feet.
$$
Occasional waves will only be displayed when values meet or exceed 5 feet.
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