FZUS63 KMQT 110215
GLFLS
Experimental Tabular Open Lake Forecast for Lake Superior
National Weather Service Negaunee MI
1015 PM EDT Thu Sep 10 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...30.0 inch ridging remains over the lake through tonight. A trough
averaging 29.5 inches tracks from the Great Plains north toward
Hudson Bay by tomorrow afternoon, bringing 29.8 inch troughing to
the lake. A cold front and 29.7 inch trough passes through on
Saturday with ridging in its wake reaching 30.0 inches by Sunday.
This strengthens further to 30.2 inches Monday.
LSZ162-110800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 PM EDT Thu Sep 10 2026 /900 PM CDT Thu Sep 10 2026/
.REST OF TONIGHT, South winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then becoming southwest 15 to 25 knots
late. Waves calm to 2 feet building to 1 to 3 feet.
.FRIDAY, Southwest winds 20 to 30 knots backing south late.
Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.FRIDAY NIGHT, South winds 20 to 30 knots veering southwest
after midnight, then becoming west 15 to 25 knots late. A chance
of showers and thunderstorms. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.SATURDAY, West winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.SATURDAY NIGHT, West winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY, Northwest winds 10 to 20 knots backing west by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT, North winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.MONDAY, Southeast gales to 35 knots veering west. A chance of
showers. Showers. Waves building to 4 to 7 feet occasionally to
9 feet.
.TUESDAY, West gales to 35 knots becoming northwest 10 to
20 knots. Waves subsiding to calm to 2 feet.
LSZ162-110800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1015 PM EDT Thu Sep 10 2026 /915 PM CDT Thu Sep 10 2026/
.Overnight...
Weather.............Partly cloudy.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.
.FRIDAY...
Weather.............Partly sunny.
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.
.FRIDAY NIGHT...
Weather.............Mostly cloudy, then showers likely with a
chance of thunderstorms after midnight.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
.SATURDAY...
Weather.............Mostly sunny.
Sfc winds...........West 15 to 20 knots.
100-ft winds........West 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
.SATURDAY NIGHT...
Weather.............Mostly 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...
.SUNDAY...West winds 10 to 15 knots. Waves 5 to 7 feet.
.MONDAY...Chance of showers in the afternoon. Showers. Northeast
winds 15 to 20 knots. Waves 8 to 12 feet.
.TUESDAY...South winds 15 to 20 knots. Waves 10 to 14 feet.
$$
LSZ263-110800-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
1015 PM EDT Thu Sep 10 2026
.Overnight...
Weather.............Partly cloudy.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet after midnight.
.FRIDAY...
Weather.............Mostly sunny.
Sfc winds...........South 15 to 20 knots.
100-ft winds........South 20 to 25 knots.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 8 feet.
.FRIDAY NIGHT...
Weather.............Mostly cloudy, then showers with a chance of
thunderstorms after midnight.
Sfc winds...........South 15 to 20 knots.
100-ft winds........South 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 7 feet.
.SATURDAY...
Weather.............Mostly sunny with chance of showers, then sunny
in the afternoon.
Sfc winds...........Southwest 15 to 20 knots becoming west 20 to 25
knots in the afternoon.
100-ft winds........Southwest 20 to 25 knots becoming west to 30
knots in the afternoon.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 8 feet.
.SATURDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........West 15 to 20 knots.
100-ft winds........West 20 to 25 knots.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 8 feet.
.FORECAST DAYS 3 THROUGH 5...
.SUNDAY...West winds 10 to 15 knots. Waves 5 to 7 feet.
.MONDAY...Chance of showers in the afternoon. Showers. Northeast
winds 15 to 20 knots. Waves 8 to 12 feet.
.TUESDAY...South winds 15 to 20 knots. Waves 10 to 14 feet.
$$
LSZ264-110800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1015 PM EDT Thu Sep 10 2026
.Overnight...
Weather.............Mostly clear.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.
.FRIDAY...
Weather.............Mostly sunny.
Sfc winds...........South 15 to 20 knots.
100-ft winds........South 20 to 25 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 8 feet.
.FRIDAY NIGHT...
Weather.............Mostly cloudy, then chance of showers after
midnight.
Sfc winds...........South 15 to 20 knots.
100-ft winds........South 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
.SATURDAY...
Weather.............Partly sunny with chance of showers, then
mostly sunny in the afternoon.
Sfc winds...........South 15 to 20 knots becoming west in the
afternoon.
100-ft winds........South 20 to 25 knots becoming west in the
afternoon.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 8 feet.
.SATURDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........West 15 to 20 knots.
100-ft winds........West 20 to 25 knots.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 9 feet.
.FORECAST DAYS 3 THROUGH 5...
.SUNDAY...West winds 10 to 15 knots. Waves 5 to 7 feet.
.MONDAY...Chance of showers in the afternoon. Showers. Northeast
winds 15 to 20 knots. Waves 8 to 12 feet.
.TUESDAY...South winds 15 to 20 knots. Waves 10 to 14 feet.
$$
LSZ265-110800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1015 PM EDT Thu Sep 10 2026
.Overnight...
Weather.............Mostly clear.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.
.FRIDAY...
Weather.............Mostly sunny.
Sfc winds...........South 15 to 20 knots.
100-ft winds........South 20 to 25 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet.
.FRIDAY NIGHT...
Weather.............Mostly cloudy, then chance of showers after
midnight.
Sfc winds...........South 15 to 20 knots.
100-ft winds........South 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 7 feet.
.SATURDAY...
Weather.............Partly sunny with chance of showers, then
mostly sunny in the afternoon.
Sfc winds...........South 15 to 20 knots becoming west 20 to 25
knots in the afternoon.
100-ft winds........South 20 to 25 knots becoming west to 30 knots
in the afternoon.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 8 feet.
.SATURDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........West 20 to 25 knots.
100-ft winds........West to 30 knots.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 9 feet.
.FORECAST DAYS 3 THROUGH 5...
.SUNDAY...West winds 10 to 15 knots. Waves 5 to 7 feet.
.MONDAY...Chance of showers in the afternoon. Showers. Northeast
winds 15 to 20 knots. Waves 8 to 12 feet.
.TUESDAY...South winds 15 to 20 knots. Waves 10 to 14 feet.
$$
LSZ266-110800-
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-
1015 PM EDT Thu Sep 10 2026
.Overnight...
Weather.............Mostly clear.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet after midnight.
.FRIDAY...
Weather.............Mostly sunny.
Sfc winds...........South 15 to 20 knots.
100-ft winds........South 20 to 25 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.
.FRIDAY NIGHT...
Weather.............Mostly cloudy, then chance of showers after
midnight.
Sfc winds...........South 20 to 25 knots.
100-ft winds........South to 30 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 10 feet.
.SATURDAY...
Weather.............Partly sunny with chance of showers, then
mostly sunny with chance of showers in the
afternoon.
Sfc winds...........South 20 to 25 knots becoming southwest in the
afternoon.
100-ft winds........South to 30 knots becoming southwest in the
afternoon.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 9 feet.
.SATURDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........West 20 to 25 knots.
100-ft winds........West to 30 knots.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 9 feet.
.FORECAST DAYS 3 THROUGH 5...
.SUNDAY...West winds 10 to 15 knots. Waves 5 to 7 feet.
.MONDAY...Chance of showers in the afternoon. Showers. Northeast
winds 15 to 20 knots. Waves 8 to 12 feet.
.TUESDAY...South winds 15 to 20 knots. Waves 10 to 14 feet.
$$
LSZ267-110800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1015 PM EDT Thu Sep 10 2026
.Overnight...
Weather.............Mostly clear.
Sfc winds...........Light and variable winds becoming south 10 to
15 knots after midnight.
100-ft winds........Light and variable winds becoming south 15 to
20 knots after midnight.
Sig waves...........2 to 4 feet.
.FRIDAY...
Weather.............Mostly sunny.
Sfc winds...........South 15 to 20 knots.
100-ft winds........South 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
.FRIDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........South 20 to 25 knots.
100-ft winds........South to 30 knots.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 9 feet.
.SATURDAY...
Weather.............Partly sunny with chance of showers, then
mostly sunny with chance of showers in the
afternoon.
Sfc winds...........South 20 to 25 knots becoming southwest in the
afternoon.
100-ft winds........South to 30 knots becoming southwest in the
afternoon.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 9 feet.
.SATURDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........West 20 to 25 knots.
100-ft winds........West to 30 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 10 feet.
.FORECAST DAYS 3 THROUGH 5...
.SUNDAY...West winds 10 to 15 knots. Waves 5 to 7 feet.
.MONDAY...Chance of showers in the afternoon. Showers. Northeast
winds 15 to 20 knots. Waves 8 to 12 feet.
.TUESDAY...South winds 15 to 20 knots. Waves 10 to 14 feet.
$$
LSZ261-110800-
MAFOR 1103/
Superior West 11420 14530 11530 11420 11430. Waves 1 to 3 feet.
Superior North Central 12420 11530 12540 11530 12420. Waves 1 to
3 feet overnight. Waves 2 to 4 feet building to 3 to 5 feet
Friday. Waves 2 to 4 feet Friday evening.
Superior South Central 11420 12430 11530 12430 12440. Waves 1 to
3 feet overnight. Waves 1 to 3 feet building to 2 to 4 feet
Friday. Waves 2 to 4 feet building to 3 to 5 feet Friday evening.
Superior East 11410 11420 14430 12440. Waves 1 to 3 feet
overnight. Waves 2 to 4 feet Friday. Waves 3 to 6 feet Friday
evening.
$$
Occasional waves will only be displayed when values meet or exceed 5 feet.
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