FZUS63 KMQT 142015
GLFLS
Experimental Tabular Open Lake Forecast for Lake Superior
National Weather Service Negaunee MI
415 PM EDT Fri Aug 14 2026
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...30.2 high pressure over Lake Superior this afternoon and early this
evening gives way to a 29.9 inch low Saturday night as the
aforementioned high moves east towards New England. This low deepens
to 29.8 inches as it reaches the Lower Great Lakes by Sunday
afternoon. Sunday night into Monday, a 30.1 inch high over the
Plains weakens to 30.0 inches as it slides generally south of Lake
Superior. By Tuesday, this high becomes centered south of the Great
Lakes as a 29.4 inch low over Hudson Bay extends a 29.8 inch trough
over Lake Superior. A second 29.7 inch low moves through the Great
Lakes region into southern Ontario on Wednesday.
LSZ162-150800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Fri Aug 14 2026 /301 PM CDT Fri Aug 14 2026/
.LATE THIS AFTERNOON, Northeast winds 15 to 25 knots. Waves 1 to
3 feet building to 2 to 4 feet.
.TONIGHT, Northeast winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then veering east late. Waves subsiding
to calm to 2 feet.
.SATURDAY, East winds 10 to 20 knots backing northeast late. A
chance of showers. Waves calm to 2 feet.
.SATURDAY NIGHT, Northeast winds 10 to 20 knots becoming north
5 to 15 knots after midnight, then backing west late. A slight
chance of showers through midnight. Waves calm to 2 feet.
.SUNDAY, West winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT, Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.MONDAY, West winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT, Southwest winds 5 to 15 knots veering west after
midnight. A chance of showers. Waves calm to 2 feet.
.TUESDAY, West winds 5 to 15 knots veering north. A chance of
showers. Waves calm to 2 feet.
.WEDNESDAY, North winds 5 to 15 knots backing northwest. Waves
calm to 2 feet.
LSZ162-150200-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
415 PM EDT Fri Aug 14 2026 /315 PM CDT Fri Aug 14 2026/
.Tonight...
Weather.............Mostly cloudy.
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 subsiding to around 5 feet after
midnight.
.SATURDAY...
Weather.............Mostly cloudy with a slight chance of showers,
then mostly cloudy with chance of showers in
the afternoon.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.SATURDAY NIGHT...
Weather.............Mostly cloudy with chance of showers, then
mostly cloudy after midnight.
Sfc winds...........Northeast 5 to 10 knots in the evening becoming
light and variable.
100-ft winds........Northeast 10 to 15 knots in the evening
becoming light and variable.
Sig waves...........2 to 4 feet.
.SUNDAY...
Weather.............Mostly sunny.
Sfc winds...........West 5 to 10 knots.
100-ft winds........West 10 to 15 knots.
Sig waves...........2 to 4 feet.
.SUNDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........West 5 to 10 knots.
100-ft winds........West 10 to 15 knots.
Sig waves...........1 to 3 feet.
.FORECAST DAYS 3 THROUGH 5...
.MONDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
.TUESDAY...Chance of showers. South winds 5 to 10 knots. Waves
2 to 4 feet.
.WEDNESDAY...Chance of showers in the morning. North winds 10 to
15 knots. Waves 3 to 5 feet.
$$
LSZ263-150200-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
415 PM EDT Fri Aug 14 2026
.Tonight...
Weather.............Mostly cloudy.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.SATURDAY...
Weather.............Mostly cloudy, then chance of showers in the
afternoon.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........2 to 4 feet.
.SATURDAY NIGHT...
Weather.............Mostly cloudy with chance of showers.
Sfc winds...........East 10 to 15 knots becoming north 5 to 10
knots after midnight.
100-ft winds........East 15 to 20 knots becoming north 10 to 15
knots after midnight.
Sig waves...........2 to 4 feet.
.SUNDAY...
Weather.............Mostly sunny.
Sfc winds...........West 10 to 15 knots.
100-ft winds........West 15 to 20 knots.
Sig waves...........2 to 4 feet.
.SUNDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........West 10 to 15 knots.
100-ft winds........West 15 to 20 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.MONDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
.TUESDAY...Chance of showers. South winds 5 to 10 knots. Waves
2 to 4 feet.
.WEDNESDAY...Chance of showers in the morning. North winds 10 to
15 knots. Waves 3 to 5 feet.
$$
LSZ264-150200-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
415 PM EDT Fri Aug 14 2026
.Tonight...
Weather.............Mostly cloudy.
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.
.SATURDAY...
Weather.............Partly sunny, then slight chance of showers in
the afternoon.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........2 to 4 feet.
.SATURDAY NIGHT...
Weather.............Showers likely.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........2 to 4 feet.
.SUNDAY...
Weather.............Mostly sunny.
Sfc winds...........Northwest 10 to 15 knots.
100-ft winds........Northwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
.SUNDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........West 5 to 10 knots.
100-ft winds........West 10 to 15 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.MONDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
.TUESDAY...Chance of showers. South winds 5 to 10 knots. Waves
2 to 4 feet.
.WEDNESDAY...Chance of showers in the morning. North winds 10 to
15 knots. Waves 3 to 5 feet.
$$
LSZ265-150200-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
415 PM EDT Fri Aug 14 2026
.Tonight...
Weather.............Mostly cloudy.
Sfc winds...........Light and variable winds becoming east 5 to 10
knots after midnight.
100-ft winds........Light and variable winds becoming east 10 to 15
knots after midnight.
Sig waves...........1 to 3 feet.
.SATURDAY...
Weather.............Partly sunny, then slight chance of showers in
the afternoon.
Sfc winds...........East 5 to 10 knots increasing to 15 to 20 knots
in the afternoon.
100-ft winds........East 10 to 15 knots increasing to 20 to 25
knots in the afternoon.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet in the afternoon.
.SATURDAY NIGHT...
Weather.............Mostly cloudy with chance of showers.
Sfc winds...........Southeast 10 to 15 knots.
100-ft winds........Southeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet in the evening.
.SUNDAY...
Weather.............Mostly sunny.
Sfc winds...........West 15 to 20 knots.
100-ft winds........West 20 to 25 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.
.SUNDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........West 10 to 15 knots.
100-ft winds........West 15 to 20 knots.
Sig waves...........3 to 5 feet subsiding to 2 to 4 feet after
midnight.
Ocnl waves..........Around 6 feet in the evening.
.FORECAST DAYS 3 THROUGH 5...
.MONDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
.TUESDAY...Chance of showers. South winds 5 to 10 knots. Waves
2 to 4 feet.
.WEDNESDAY...Chance of showers in the morning. North winds 10 to
15 knots. Waves 3 to 5 feet.
$$
LSZ266-150200-
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 PM EDT Fri Aug 14 2026
.Tonight...
Weather.............Mostly cloudy.
Sfc winds...........Light and variable winds.
100-ft winds........Light and variable winds.
Sig waves...........2 feet or less.
.SATURDAY...
Weather.............Partly sunny.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........2 to 4 feet.
.SATURDAY NIGHT...
Weather.............Mostly cloudy with chance of showers, then
mostly cloudy with showers likely after
midnight.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........2 to 4 feet.
.SUNDAY...
Weather.............Partly sunny with chance of showers, then
mostly sunny in the afternoon.
Sfc winds...........Southwest 10 to 15 knots becoming northwest 15
to 20 knots in the afternoon.
100-ft winds........Southwest 15 to 20 knots becoming northwest 20
to 25 knots in the afternoon.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.
.SUNDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northwest 10 to 15 knots.
100-ft winds........Northwest 15 to 20 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 7 feet.
.FORECAST DAYS 3 THROUGH 5...
.MONDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
.TUESDAY...Chance of showers. South winds 5 to 10 knots. Waves
2 to 4 feet.
.WEDNESDAY...Chance of showers in the morning. North winds 10 to
15 knots. Waves 3 to 5 feet.
$$
LSZ267-150200-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
415 PM EDT Fri Aug 14 2026
.Tonight...
Weather.............Mostly cloudy.
Sfc winds...........Northwest 5 to 10 knots in the evening becoming
light and variable.
100-ft winds........Northwest 10 to 15 knots in the evening
becoming light and variable.
Sig waves...........1 to 3 feet.
.SATURDAY...
Weather.............Mostly sunny.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........1 to 3 feet.
.SATURDAY NIGHT...
Weather.............Mostly cloudy, then chance of showers after
midnight.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet.
.SUNDAY...
Weather.............Partly sunny.
Sfc winds...........Southeast 10 to 15 knots becoming west 15 to 20
knots in the afternoon.
100-ft winds........Southeast 15 to 20 knots becoming west 20 to 25
knots in the afternoon.
Sig waves...........2 to 4 feet building to 4 to 6 feet in the
afternoon.
Ocnl waves..........Around 8 feet in the afternoon.
.SUNDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northwest 15 to 20 knots.
100-ft winds........Northwest 20 to 25 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.
.FORECAST DAYS 3 THROUGH 5...
.MONDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
.TUESDAY...Chance of showers. South winds 5 to 10 knots. Waves
2 to 4 feet.
.WEDNESDAY...Chance of showers in the morning. North winds 10 to
15 knots. Waves 3 to 5 feet.
$$
LSZ261-150200-
MAFOR 1421/
Superior West 11120 12220 14210 11220. A chance of showers
Saturday afternoon. Waves 1 to 2 feet.
Superior North Central 11200 14300 12310 11220. Waves 1 foot or
less.
Superior South Central 11100 13200 12310 11320 11230. Waves 1
foot or less tonight. Waves 1 to 3 feet Saturday.
Superior East 11700 12800 11100 12200 11300 11210. Waves 2 feet
or less.
$$
Occasional waves will only be displayed when values meet or exceed 5 feet.
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