FZUS63 KMQT 020815
GLFLS
Experimental Tabular Open Lake Forecast for Lake Superior
National Weather Service Negaunee MI
415 AM EDT Sat Aug 2 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...30.3 inc high pressure remains centered over the western Great
Lakes today. Sunday, it weakens to 30.2 inches as it shifts to the
Lower Great Lakes and east. This high continues to slide eastward
Monday while another 30.2 inch high slides across the shores of the
Hudson Bay. This high will build to 30.3 inches over Quebec into the
middle of next week, extending surface ridging over Lake Superior.
LSZ162-022000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
402 AM EDT Sat Aug 2 2025 /302 AM CDT Sat Aug 2 2025/
.EARLY THIS MORNING, West winds 5 to 15 knots. Haze and areas of
smoke. Waves calm to 2 feet.
.TODAY, Southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Areas of smoke through early
afternoon. Haze. Waves building to 1 to 3 feet.
.TONIGHT, Southwest winds 10 to 20 knots diminishing to 5 to
15 knots late. Haze. Waves subsiding to calm to 2 feet.
.SUNDAY, Southwest winds 5 to 15 knots. Haze. Waves calm to
2 feet.
.SUNDAY NIGHT, South winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY, East winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY NIGHT, East winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY, East winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY, Southeast winds 10 to 20 knots becoming south 5 to
15 knots. A chance of showers and thunderstorms. Waves calm to
2 feet.
LSZ162-021400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
415 AM EDT Sat Aug 2 2025 /315 AM CDT Sat Aug 2 2025/
.Today...
Weather.............Mostly sunny with haze with areas of smoke,
then mostly sunny with haze in the afternoon.
Sfc winds...........Southwest 10 to 15 knots.
100-ft winds........Southwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet in the afternoon.
.TONIGHT...
Weather.............Partly cloudy with haze.
Sfc winds...........Southwest 10 to 15 knots.
100-ft winds........Southwest 15 to 20 knots.
Sig waves...........3 to 5 feet subsiding to 2 to 4 feet after
midnight.
Ocnl waves..........Around 5 feet in the evening.
.SUNDAY...
Weather.............Mostly sunny with haze.
Sfc winds...........Southwest 5 to 10 knots.
100-ft winds........Southwest 10 to 15 knots.
Sig waves...........2 to 4 feet.
.SUNDAY NIGHT...
Weather.............Mostly cloudy with haze, then mostly cloudy
after midnight.
Sfc winds...........Light and variable winds.
100-ft winds........Light and variable winds.
Sig waves...........1 to 3 feet.
.FORECAST DAYS 3 THROUGH 5...
.MONDAY...North winds 5 to 10 knots. Waves 1 to 3 feet.
.TUESDAY...Northeast winds 5 to 10 knots. Waves 2 to 4 feet.
.WEDNESDAY...East winds 10 to 15 knots. Waves 2 to 4 feet.
$$
LSZ263-021400-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
415 AM EDT Sat Aug 2 2025
.Today...
Weather.............Mostly sunny with haze with areas of smoke,
then mostly sunny with haze in the afternoon.
Sfc winds...........Southwest 10 to 15 knots.
100-ft winds........Southwest 15 to 20 knots.
Sig waves...........2 to 4 feet building to 3 to 5 feet in the
afternoon.
Ocnl waves..........Around 6 feet in the afternoon.
.TONIGHT...
Weather.............Partly cloudy with haze.
Sfc winds...........Southwest 10 to 15 knots.
100-ft winds........Southwest 15 to 20 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
.SUNDAY...
Weather.............Mostly sunny with haze.
Sfc winds...........Southwest 10 to 15 knots.
100-ft winds........Southwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
.SUNDAY NIGHT...
Weather.............Partly cloudy with haze, then mostly cloudy
after midnight.
Sfc winds...........Southwest 5 to 10 knots becoming south after
midnight.
100-ft winds........Southwest 10 to 15 knots becoming south after
midnight.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.MONDAY...North winds 5 to 10 knots. Waves 1 to 3 feet.
.TUESDAY...Northeast winds 5 to 10 knots. Waves 2 to 4 feet.
.WEDNESDAY...East winds 10 to 15 knots. Waves 2 to 4 feet.
$$
LSZ264-021400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
415 AM EDT Sat Aug 2 2025
.Today...
Weather.............Mostly sunny with areas of smoke, then mostly
sunny with haze with areas of smoke in the
afternoon.
Sfc winds...........Southwest 15 to 20 knots.
100-ft winds........Southwest 20 to 25 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.............Partly cloudy with haze.
Sfc winds...........Southwest 15 to 20 knots.
100-ft winds........Southwest 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
.SUNDAY...
Weather.............Mostly sunny with haze.
Sfc winds...........Southwest 10 to 15 knots.
100-ft winds........Southwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet in the morning.
.SUNDAY NIGHT...
Weather.............Partly cloudy with haze, then mostly cloudy
after midnight.
Sfc winds...........Southwest 5 to 10 knots.
100-ft winds........Southwest 10 to 15 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.MONDAY...North winds 5 to 10 knots. Waves 1 to 3 feet.
.TUESDAY...Northeast winds 5 to 10 knots. Waves 2 to 4 feet.
.WEDNESDAY...East winds 10 to 15 knots. Waves 2 to 4 feet.
$$
LSZ265-021400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
415 AM EDT Sat Aug 2 2025
.Today...
Weather.............Mostly sunny with areas of smoke, then mostly
sunny with areas of smoke and haze in the
afternoon.
Sfc winds...........West 10 to 15 knots.
100-ft winds........West 15 to 20 knots.
Sig waves...........2 to 4 feet.
.TONIGHT...
Weather.............Partly cloudy with haze.
Sfc winds...........Northwest 5 to 10 knots becoming southwest 10
to 15 knots after midnight.
100-ft winds........Northwest 10 to 15 knots becoming southwest 15
to 20 knots after midnight.
Sig waves...........2 to 4 feet.
.SUNDAY...
Weather.............Mostly sunny with haze.
Sfc winds...........West 5 to 10 knots.
100-ft winds........West 10 to 15 knots.
Sig waves...........1 to 3 feet.
.SUNDAY NIGHT...
Weather.............Partly cloudy with haze, then mostly cloudy
after midnight.
Sfc winds...........Light and variable winds.
100-ft winds........Light and variable winds.
Sig waves...........2 feet or less.
.FORECAST DAYS 3 THROUGH 5...
.MONDAY...North winds 5 to 10 knots. Waves 1 to 3 feet.
.TUESDAY...Northeast winds 5 to 10 knots. Waves 2 to 4 feet.
.WEDNESDAY...East winds 10 to 15 knots. Waves 2 to 4 feet.
$$
LSZ266-021400-
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 Sat Aug 2 2025
.Today...
Weather.............Mostly sunny with areas of smoke.
Sfc winds...........West 10 to 15 knots.
100-ft winds........West 15 to 20 knots.
Sig waves...........2 to 4 feet building to 3 to 5 feet in the
afternoon.
Ocnl waves..........Around 5 feet building to around 6 feet in the
afternoon.
.TONIGHT...
Weather.............Partly cloudy with haze with areas of smoke,
then partly cloudy with haze after midnight.
Sfc winds...........Southwest 10 to 15 knots.
100-ft winds........Southwest 15 to 20 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
.SUNDAY...
Weather.............Mostly sunny with haze.
Sfc winds...........Southwest 10 to 15 knots.
100-ft winds........Southwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet in the morning.
.SUNDAY NIGHT...
Weather.............Partly cloudy with haze, then mostly cloudy
after midnight.
Sfc winds...........Light and variable winds.
100-ft winds........Light and variable winds.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.MONDAY...North winds 5 to 10 knots. Waves 1 to 3 feet.
.TUESDAY...Northeast winds 5 to 10 knots. Waves 2 to 4 feet.
.WEDNESDAY...East winds 10 to 15 knots. Waves 2 to 4 feet.
$$
LSZ267-021400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
415 AM EDT Sat Aug 2 2025
.Today...
Weather.............Mostly sunny with haze with areas of smoke,
then mostly sunny with areas of smoke in the
afternoon.
Sfc winds...........West 10 to 15 knots.
100-ft winds........West 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet.
.TONIGHT...
Weather.............Partly cloudy with areas of smoke, then partly
cloudy with haze after midnight.
Sfc winds...........Southwest 10 to 15 knots.
100-ft winds........Southwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
.SUNDAY...
Weather.............Mostly sunny with haze.
Sfc winds...........West 10 to 15 knots.
100-ft winds........West 15 to 20 knots.
Sig waves...........2 to 4 feet.
.SUNDAY NIGHT...
Weather.............Partly cloudy with haze, then partly cloudy
after midnight.
Sfc winds...........Light and variable winds.
100-ft winds........Light and variable winds.
Sig waves...........1 to 3 feet.
.FORECAST DAYS 3 THROUGH 5...
.MONDAY...North winds 5 to 10 knots. Waves 1 to 3 feet.
.TUESDAY...Northeast winds 5 to 10 knots. Waves 2 to 4 feet.
.WEDNESDAY...East winds 10 to 15 knots. Waves 2 to 4 feet.
$$
LSZ261-021400-
MAFOR 0209/
Superior West 12610 14520 12510. Waves 1 to 2 feet.
Superior North Central 12610 11620 13530 12620. Waves 2 to 4
feet.
Superior South Central 12610 11620 13610 12510. Waves 1 to 3
feet.
Superior East 14610 11610 13510. Waves 1 to 3 feet.
$$
Occasional waves will only be displayed when values meet or exceed 5 feet.
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