FZUS63 KMQT 271416
GLFLS
Experimental Tabular Open Lake Forecast for Lake Superior
National Weather Service Negaunee MI
1016 AM EDT Sun Sep 27 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...A 30.3 inch high shifts from northern Quebec to the Canadian
Maritimes today while a 29.3 inch low spins over Nunavut and a 29.5
inch nor'easter weakens to 29.7 inches over New Jersey. Lake
Superior will remain under 30.1 inch ridging between these three
features through Monday. A 29.7 inch low develops in the lee of the
northern Rockies on Monday and ejects northeast to northern Ontario
at 29.6 inches by Tuesday. Tuesday night through Wednesday night, a
29.3 inch low moves across the far northern Canadian Prairie to
Hudson Bay, dragging a 29.7 inch trough across Lake Superior
Wednesday night. High pressure of 30.2 inches returns to the Upper
Great Lakes By Friday.
LSZ162-272000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 AM EDT Sun Sep 27 2026 /901 AM CDT Sun Sep 27 2026/
.REST OF TODAY, South winds 5 to 15 knots veering southwest in
the afternoon. Waves calm to 2 feet.
.TONIGHT, West winds 5 to 15 knots veering north late. Waves
calm to 2 feet.
.MONDAY, Northeast winds less than 10 knots becoming east 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.MONDAY NIGHT, East winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.TUESDAY, South winds 10 to 20 knots veering southwest by mid
afternoon. A chance of rain through early afternoon, then rain
likely by mid afternoon. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.TUESDAY NIGHT, South winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. A chance of rain. Waves calm to
2 feet.
.WEDNESDAY, Southwest winds 5 to 15 knots becoming west 10 to
20 knots. Waves calm to 2 feet.
.THURSDAY, West winds 10 to 20 knots veering northwest. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
LSZ162-272000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1016 AM EDT Sun Sep 27 2026 /916 AM CDT Sun Sep 27 2026/
.This Afternoon...
Weather.............Mostly cloudy with a slight chance of showers,
then partly sunny in the afternoon.
Sfc winds...........South 5 to 10 knots.
100-ft winds........South 10 to 15 knots.
Sig waves...........2 to 4 feet.
.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........Light and variable winds.
100-ft winds........Light and variable winds.
Sig waves...........1 to 3 feet.
.MONDAY...
Weather.............Mostly sunny.
Sfc winds...........Light and variable winds.
100-ft winds........Light and variable winds.
Sig waves...........1 to 3 feet.
.MONDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Northeast 5 to 10 knots.
100-ft winds........Northeast 10 to 15 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...Chance of rain in the afternoon. rain likely in the
evening, then chance of rain after midnight. Southeast winds
10 to 15 knots. Waves 3 to 5 feet.
.WEDNESDAY...Chance of rain. chance of showers. South winds 10 to
15 knots. Waves 4 to 6 feet.
.THURSDAY...Southwest winds 10 to 15 knots. Waves 4 to 6 feet.
$$
LSZ263-272000-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
1016 AM EDT Sun Sep 27 2026
.This Afternoon...
Weather.............Mostly cloudy.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.
.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........Southwest 5 to 10 knots.
100-ft winds........Southwest 10 to 15 knots.
Sig waves...........1 to 3 feet.
.MONDAY...
Weather.............Mostly sunny.
Sfc winds...........North 5 to 10 knots in the morning becoming
light and variable.
100-ft winds........North 10 to 15 knots in the morning becoming
light and variable.
Sig waves...........1 to 3 feet.
.MONDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Northeast 5 to 10 knots becoming southeast 10
to 15 knots after midnight.
100-ft winds........Northeast 10 to 15 knots becoming southeast 15
to 20 knots after midnight.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...Chance of rain in the afternoon. rain likely in the
evening, then chance of rain after midnight. Southeast winds
10 to 15 knots. Waves 3 to 5 feet.
.WEDNESDAY...Chance of rain. chance of showers. South winds 10 to
15 knots. Waves 4 to 6 feet.
.THURSDAY...Southwest winds 10 to 15 knots. Waves 4 to 6 feet.
$$
LSZ264-272000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1016 AM EDT Sun Sep 27 2026
.This Afternoon...
Weather.............Partly sunny.
Sfc winds...........South 5 to 10 knots.
100-ft winds........South 10 to 15 knots.
Sig waves...........2 to 4 feet.
.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........Southwest 5 to 10 knots.
100-ft winds........Southwest 10 to 15 knots.
Sig waves...........1 to 3 feet.
.MONDAY...
Weather.............Mostly sunny.
Sfc winds...........Northwest 5 to 10 knots in the morning becoming
light and variable.
100-ft winds........Northwest 10 to 15 knots in the morning
becoming light and variable.
Sig waves...........1 to 3 feet.
.MONDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Light and variable winds becoming southeast 10
to 15 knots after midnight.
100-ft winds........Light and variable winds becoming southeast 15
to 20 knots after midnight.
Sig waves...........1 to 3 feet.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...Chance of rain in the afternoon. rain likely in the
evening, then chance of rain after midnight. Southeast winds
10 to 15 knots. Waves 3 to 5 feet.
.WEDNESDAY...Chance of rain. chance of showers. South winds 10 to
15 knots. Waves 4 to 6 feet.
.THURSDAY...Southwest winds 10 to 15 knots. Waves 4 to 6 feet.
$$
LSZ265-272000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1016 AM EDT Sun Sep 27 2026
.This Afternoon...
Weather.............Mostly sunny.
Sfc winds...........South 5 to 10 knots late in the morning
becoming light and variable.
100-ft winds........South 10 to 15 knots late in the morning
becoming light and variable.
Sig waves...........2 feet or less.
.TONIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Light and variable winds.
100-ft winds........Light and variable winds.
Sig waves...........2 feet or less.
.MONDAY...
Weather.............Partly sunny.
Sfc winds...........Northwest 5 to 10 knots in the morning becoming
light and variable.
100-ft winds........Northwest 10 to 15 knots in the morning
becoming light and variable.
Sig waves...........2 feet or less.
.MONDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Light and variable winds becoming southeast 5
to 10 knots after midnight.
100-ft winds........Light and variable winds becoming southeast 10
to 15 knots after midnight.
Sig waves...........1 to 3 feet.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...Chance of rain in the afternoon. rain likely in the
evening, then chance of rain after midnight. Southeast winds
10 to 15 knots. Waves 3 to 5 feet.
.WEDNESDAY...Chance of rain. chance of showers. South winds 10 to
15 knots. Waves 4 to 6 feet.
.THURSDAY...Southwest winds 10 to 15 knots. Waves 4 to 6 feet.
$$
LSZ266-272000-
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-
1016 AM EDT Sun Sep 27 2026
.This Afternoon...
Weather.............Mostly sunny.
Sfc winds...........South 5 to 10 knots late in the morning
becoming light and variable.
100-ft winds........South 10 to 15 knots late in the morning
becoming light and variable.
Sig waves...........1 to 3 feet.
.TONIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Light and variable winds.
100-ft winds........Light and variable winds.
Sig waves...........2 feet or less.
.MONDAY...
Weather.............Partly sunny.
Sfc winds...........Northwest 5 to 10 knots in the morning becoming
light and variable.
100-ft winds........Northwest 10 to 15 knots in the morning
becoming light and variable.
Sig waves...........2 feet or less.
.MONDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Light and variable winds becoming southeast 5
to 10 knots after midnight.
100-ft winds........Light and variable winds becoming southeast 10
to 15 knots after midnight.
Sig waves...........1 to 3 feet.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...Chance of rain in the afternoon. rain likely in the
evening, then chance of rain after midnight. Southeast winds
10 to 15 knots. Waves 3 to 5 feet.
.WEDNESDAY...Chance of rain. chance of showers. South winds 10 to
15 knots. Waves 4 to 6 feet.
.THURSDAY...Southwest winds 10 to 15 knots. Waves 4 to 6 feet.
$$
LSZ267-272000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1016 AM EDT Sun Sep 27 2026
.This Afternoon...
Weather.............Sunny.
Sfc winds...........Southeast 5 to 10 knots late in the morning
becoming light and variable.
100-ft winds........Southeast 10 to 15 knots late in the morning
becoming light and variable.
Sig waves...........2 feet or less.
.TONIGHT...
Weather.............Mostly cloudy with patchy fog, then mostly
cloudy after midnight.
Sfc winds...........Light and variable winds.
100-ft winds........Light and variable winds.
Sig waves...........2 feet or less.
.MONDAY...
Weather.............Mostly sunny.
Sfc winds...........Northwest 5 to 10 knots.
100-ft winds........Northwest 10 to 15 knots.
Sig waves...........1 to 3 feet.
.MONDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Northwest 5 to 10 knots in the evening becoming
light and variable.
100-ft winds........Northwest 10 to 15 knots in the evening
becoming light and variable.
Sig waves...........1 to 3 feet.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...Chance of rain in the afternoon. rain likely in the
evening, then chance of rain after midnight. Southeast winds
10 to 15 knots. Waves 3 to 5 feet.
.WEDNESDAY...Chance of rain. chance of showers. South winds 10 to
15 knots. Waves 4 to 6 feet.
.THURSDAY...Southwest winds 10 to 15 knots. Waves 4 to 6 feet.
$$
LSZ261-272000-
MAFOR 2715/
Superior West 11400 13500 11600 11700 11800 11100. Waves 1 foot
or less.
Superior North Central 14500 11600 11700 12800. Waves 1 foot or
less.
Superior South Central 11400 11300 11200 11500 11600 12700 11800.
Waves 1 foot or less.
Superior East 11400 11500 11800 11100 11600 12700 11800. Waves 1
foot or less.
$$
Occasional waves will only be displayed when values meet or exceed 5 feet.
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