FZUS63 KMQT 140815
GLFLS
Experimental Tabular Open Lake Forecast for Lake Superior
National Weather Service Negaunee MI
415 AM EDT Sun Sep 14 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...30.1 inch ridging remains in place through today as a 30.2 inch high
over northern Ontario moves southeastward early this weekend. The
ridging over Lake Superior strengthens to 30.2 inches early Monday
morning as the high builds to 30.3 inches over Quebec. The 30.2 inch
ridging over the lake remains until a 29.8 inch low moving through
far northern Ontario into Hudson Bay Tuesday night brings troughing
of 30.0 inches back to Lake Superior; troughing continues to deepen
to 29.9 inches Wednesday and remains until a 30.4 inch high moving
into Hudson Bay brings 30.1 inch ridging back over Lake Superior
Thursday, deepening to 30.3 inches by Friday.
LSZ162-142000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 AM EDT Sun Sep 14 2025 /301 AM CDT Sun Sep 14 2025/
.EARLY THIS MORNING, Northeast winds 5 to 15 knots. Patchy fog.
Waves 1 to 3 feet.
.TODAY, East winds 10 to 20 knots becoming northeast 15 to
25 knots in the afternoon. Patchy fog through early afternoon.
Waves building to 3 to 5 feet occasionally to 7 feet.
.TONIGHT, Northeast winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then becoming east 5 to 15 knots late.
Patchy fog. Waves subsiding to 1 to 3 feet.
.MONDAY, East winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon, then backing northeast late. A slight chance of
showers and thunderstorms by mid afternoon. Waves subsiding to
calm to 2 feet.
.MONDAY NIGHT, Northeast winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.TUESDAY, East winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT, Northeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.WEDNESDAY, South winds 5 to 15 knots backing northeast. A
chance of showers and thunderstorms. Waves calm to 2 feet.
.THURSDAY, Northeast winds 10 to 20 knots increasing to 15 to
25 knots. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
LSZ162-141400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
415 AM EDT Sun Sep 14 2025 /315 AM CDT Sun Sep 14 2025/
.Today...
Weather.............Partly sunny with patchy fog, then partly sunny
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 7 feet.
.TONIGHT...
Weather.............Mostly cloudy, then patchy fog after midnight.
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.
.MONDAY...
Weather.............Mostly sunny with patchy fog, then mostly sunny
in the afternoon.
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 morning.
.MONDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...East winds 5 to 10 knots. Waves 2 to 4 feet.
.WEDNESDAY...Chance of showers. Southeast winds 5 to 10 knots.
Waves 2 to 4 feet.
.THURSDAY...Chance of showers. North winds 10 to 15 knots. Waves
3 to 5 feet.
$$
LSZ263-141400-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
415 AM EDT Sun Sep 14 2025
.Today...
Weather.............Partly sunny with patchy fog, then mostly sunny
in the afternoon.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet in the afternoon.
.TONIGHT...
Weather.............Partly cloudy, then mostly cloudy with patchy
fog after midnight.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
.MONDAY...
Weather.............Mostly sunny with patchy fog, then mostly sunny
in the afternoon.
Sfc winds...........East 5 to 10 knots.
100-ft winds........East 10 to 15 knots.
Sig waves...........2 to 4 feet.
.MONDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...East winds 5 to 10 knots. Waves 2 to 4 feet.
.WEDNESDAY...Chance of showers. Southeast winds 5 to 10 knots.
Waves 2 to 4 feet.
.THURSDAY...Chance of showers. North winds 10 to 15 knots. Waves
3 to 5 feet.
$$
LSZ264-141400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
415 AM EDT Sun Sep 14 2025
.Today...
Weather.............Mostly cloudy with patchy fog, then mostly
sunny in the afternoon.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........2 to 4 feet.
.TONIGHT...
Weather.............Partly cloudy, then mostly cloudy with patchy
fog after midnight.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........2 to 4 feet.
.MONDAY...
Weather.............Mostly sunny with patchy fog, then mostly sunny
in the afternoon.
Sfc winds...........Southeast 10 to 15 knots.
100-ft winds........Southeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.MONDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Southeast 10 to 15 knots.
100-ft winds........Southeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...East winds 5 to 10 knots. Waves 2 to 4 feet.
.WEDNESDAY...Chance of showers. Southeast winds 5 to 10 knots.
Waves 2 to 4 feet.
.THURSDAY...Chance of showers. North winds 10 to 15 knots. Waves
3 to 5 feet.
$$
LSZ265-141400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
415 AM EDT Sun Sep 14 2025
.Today...
Weather.............Mostly cloudy with patchy fog, then partly
sunny in the afternoon.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........2 to 4 feet.
.TONIGHT...
Weather.............Mostly cloudy, then patchy fog after midnight.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........2 to 4 feet.
.MONDAY...
Weather.............Mostly sunny with patchy fog, then sunny in the
afternoon.
Sfc winds...........Southeast 10 to 15 knots.
100-ft winds........Southeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.MONDAY NIGHT...
Weather.............Mostly clear.
Sfc winds...........Southeast 10 to 15 knots.
100-ft winds........Southeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...East winds 5 to 10 knots. Waves 2 to 4 feet.
.WEDNESDAY...Chance of showers. Southeast winds 5 to 10 knots.
Waves 2 to 4 feet.
.THURSDAY...Chance of showers. North winds 10 to 15 knots. Waves
3 to 5 feet.
$$
LSZ266-141400-
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 Sun Sep 14 2025
.Today...
Weather.............Mostly cloudy with patchy fog, then partly
sunny in the afternoon.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........2 to 4 feet.
.TONIGHT...
Weather.............Mostly cloudy, then patchy fog after midnight.
Sfc winds...........Northeast 10 to 15 knots becoming east after
midnight.
100-ft winds........Northeast 15 to 20 knots becoming east after
midnight.
Sig waves...........2 to 4 feet.
.MONDAY...
Weather.............Mostly sunny with patchy fog, then mostly sunny
in the afternoon.
Sfc winds...........Southeast 10 to 15 knots.
100-ft winds........Southeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.MONDAY NIGHT...
Weather.............Mostly clear.
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.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...East winds 5 to 10 knots. Waves 2 to 4 feet.
.WEDNESDAY...Chance of showers. Southeast winds 5 to 10 knots.
Waves 2 to 4 feet.
.THURSDAY...Chance of showers. North winds 10 to 15 knots. Waves
3 to 5 feet.
$$
LSZ267-141400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
415 AM EDT Sun Sep 14 2025
.Today...
Weather.............Partly sunny with patchy fog, then mostly sunny
in the afternoon.
Sfc winds...........Northeast 5 to 10 knots.
100-ft winds........Northeast 10 to 15 knots.
Sig waves...........1 to 3 feet.
.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northeast 5 to 10 knots becoming east 10 to 15
knots after midnight.
100-ft winds........Northeast 10 to 15 knots becoming east 15 to 20
knots after midnight.
Sig waves...........1 to 3 feet.
.MONDAY...
Weather.............Mostly sunny with patchy fog, then sunny in the
afternoon.
Sfc winds...........Southeast 10 to 15 knots.
100-ft winds........Southeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.MONDAY NIGHT...
Weather.............Mostly clear.
Sfc winds...........Southeast 10 to 15 knots.
100-ft winds........Southeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...East winds 5 to 10 knots. Waves 2 to 4 feet.
.WEDNESDAY...Chance of showers. Southeast winds 5 to 10 knots.
Waves 2 to 4 feet.
.THURSDAY...Chance of showers. North winds 10 to 15 knots. Waves
3 to 5 feet.
$$
LSZ261-141400-
MAFOR 1409/
Superior West 13220 11120 11130 11230 11220 11210. Waves 1 to 3
feet building to 2 to 4 feet today. Waves 3 to 5 feet subsiding
to 2 to 4 feet tonight.
Superior North Central 11200 14210 13310. Waves 2 feet or less.
Superior South Central 12200 13210 13310. Waves 2 feet or less.
Superior East 11100 13210 12200 11300 11310. Waves 2 feet or
less.
$$
Occasional waves will only be displayed when values meet or exceed 5 feet.
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