FZUS63 KMQT 010215
GLFLS
Experimental Tabular Open Lake Forecast for Lake Superior
National Weather Service Negaunee MI
1015 PM EDT Tue Jun 30 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 29.3 inch low will remain stalled near Lake Winnipeg tonight and
gradually weaken to 29.5 inches by Wednesday morning. It will then
weaken further with a broad 29.6 inch low over Ontario and Quebec by
late Wednesday afternoon. The low will push toward the Hudson Bay
and Quebec Wednesday night into Thursday dragging a 29.7 inch trough
over Lake Superior. Thereafter a 30.0 inch high will build over
Ontario, extending south into the Upper Great Lakes through the
weekend and into next week.
LSZ162-010800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 PM EDT Tue Jun 30 2026 /901 PM CDT Tue Jun 30 2026/
, DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT /10 AM CDT/
WEDNESDAY,
.REST OF TONIGHT, Southwest winds 10 to 20 knots diminishing to
5 to 15 knots late. Waves calm to 2 feet.
.WEDNESDAY, Southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. A slight chance of showers and
thunderstorms by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT, Southwest winds 5 to 15 knots. A chance of
showers and a slight chance of thunderstorms through midnight.
Waves calm to 2 feet.
.THURSDAY, Southwest winds 10 to 20 knots. Waves building to
1 to 3 feet.
.THURSDAY NIGHT, West winds 5 to 15 knots veering northeast
after midnight. A slight chance of showers and thunderstorms
after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY, Northeast winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.FRIDAY NIGHT, Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY, Northeast winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.SUNDAY, Northeast winds 5 to 15 knots becoming north less than
10 knots. Waves calm to 2 feet.
LSZ162-010800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1015 PM EDT Tue Jun 30 2026 /915 PM CDT Tue Jun 30 2026/
...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT /10 AM CDT/
WEDNESDAY...
.Overnight...
Weather.............Mostly clear.
Sfc winds...........Southwest 10 to 15 knots.
100-ft winds........Southwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
.WEDNESDAY...
Weather.............Mostly sunny, then slight chance of showers in
the afternoon.
Sfc winds...........Southwest 10 to 15 knots.
100-ft winds........Southwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
.WEDNESDAY NIGHT...
Weather.............Partly cloudy with chance of showers, 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.
.THURSDAY...
Weather.............Mostly sunny.
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 5 feet in the afternoon.
.THURSDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Southwest 5 to 10 knots in the evening becoming
light and variable.
100-ft winds........Southwest 10 to 15 knots in the evening
becoming light and variable.
Sig waves...........2 to 4 feet subsiding to 1 to 3 feet after
midnight.
Ocnl waves..........Around 5 feet in the evening.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...Slight chance of showers in the morning. chance of
showers in the afternoon and evening. North winds 5 to 10 knots.
Waves 2 to 4 feet.
.SATURDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
.SUNDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
$$
LSZ263-010800-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
1015 PM EDT Tue Jun 30 2026
...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT WEDNESDAY...
.Overnight...
Weather.............Partly cloudy.
Sfc winds...........Southwest 10 to 15 knots.
100-ft winds........Southwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet.
.WEDNESDAY...
Weather.............Mostly sunny.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
.WEDNESDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Southwest 10 to 15 knots.
100-ft winds........Southwest 15 to 20 knots.
Sig waves...........3 to 5 feet subsiding to 2 to 4 feet after
midnight.
Ocnl waves..........Around 6 feet subsiding to around 5 feet after
midnight.
.THURSDAY...
Weather.............Mostly sunny.
Sfc winds...........Southwest 15 to 20 knots.
100-ft winds........Southwest 20 to 25 knots.
Sig waves...........2 to 4 feet building to 3 to 5 feet in the
afternoon.
Ocnl waves..........Around 7 feet in the afternoon.
.THURSDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Southwest 10 to 15 knots.
100-ft winds........Southwest 15 to 20 knots.
Sig waves...........3 to 5 feet subsiding to 2 to 4 feet after
midnight.
Ocnl waves..........Around 7 feet in the evening.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...Slight chance of showers in the morning. chance of
showers in the afternoon and evening. North winds 5 to 10 knots.
Waves 2 to 4 feet.
.SATURDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
.SUNDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
$$
LSZ264-010800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1015 PM EDT Tue Jun 30 2026
...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT WEDNESDAY...
.Overnight...
Weather.............Partly cloudy with patchy fog.
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.
.WEDNESDAY...
Weather.............Sunny with patchy fog, then mostly sunny 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 5 feet building to around 6 feet in the
afternoon.
.WEDNESDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 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.
.THURSDAY...
Weather.............Partly sunny.
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.
.THURSDAY NIGHT...
Weather.............Partly cloudy.
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 6 feet in the evening.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...Slight chance of showers in the morning. chance of
showers in the afternoon and evening. North winds 5 to 10 knots.
Waves 2 to 4 feet.
.SATURDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
.SUNDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
$$
LSZ265-010800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1015 PM EDT Tue Jun 30 2026
...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT WEDNESDAY...
.Overnight...
Weather.............Mostly cloudy with a slight chance of
thunderstorms and patchy fog, then partly
cloudy with patchy fog after midnight.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.
.WEDNESDAY...
Weather.............Sunny with patchy fog, then partly sunny with a
slight chance of showers and thunderstorms in
the afternoon.
Sfc winds...........Southwest 10 to 15 knots becoming south 5 to 10
knots in the afternoon.
100-ft winds........Southwest 15 to 20 knots becoming south 10 to
15 knots in the afternoon.
Sig waves...........1 to 3 feet.
.WEDNESDAY NIGHT...
Weather.............Mostly cloudy with chance of showers and
thunderstorms, then mostly cloudy after
midnight.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.
.THURSDAY...
Weather.............Mostly sunny with chance of showers, then sunny
in the afternoon.
Sfc winds...........Southwest 10 to 15 knots.
100-ft winds........Southwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
.THURSDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Southwest 5 to 10 knots.
100-ft winds........Southwest 10 to 15 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...Slight chance of showers in the morning. chance of
showers in the afternoon and evening. North winds 5 to 10 knots.
Waves 2 to 4 feet.
.SATURDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
.SUNDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
$$
LSZ266-010800-
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 Tue Jun 30 2026
...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT WEDNESDAY...
.Overnight...
Weather.............Mostly cloudy with a slight chance of showers,
thunderstorms and patchy fog, then partly
cloudy with patchy fog after midnight.
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.
.WEDNESDAY...
Weather.............Sunny with patchy dense fog, then partly sunny
with a slight chance of showers in the
afternoon.
Sfc winds...........Southwest 10 to 15 knots.
100-ft winds........Southwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
.WEDNESDAY NIGHT...
Weather.............Mostly cloudy with chance of showers.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.
.THURSDAY...
Weather.............Partly sunny with chance of showers, then
mostly sunny 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.
.THURSDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........North 5 to 10 knots becoming south after
midnight.
100-ft winds........North 10 to 15 knots becoming south after
midnight.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet in the evening.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...Slight chance of showers in the morning. chance of
showers in the afternoon and evening. North winds 5 to 10 knots.
Waves 2 to 4 feet.
.SATURDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
.SUNDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
$$
LSZ267-010800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1015 PM EDT Tue Jun 30 2026
...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT WEDNESDAY...
.Overnight...
Weather.............Mostly cloudy with chance of showers with
possible thunderstorms and fog, then mostly
cloudy with a slight chance of showers,
thunderstorms and patchy fog after midnight.
Sfc winds...........South 15 to 20 knots.
100-ft winds........South 20 to 25 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet after midnight.
.WEDNESDAY...
Weather.............Mostly sunny with areas of dense fog, then
partly sunny with patchy dense fog in the
afternoon.
Sfc winds...........South 5 to 10 knots.
100-ft winds........South 10 to 15 knots.
Sig waves...........2 to 4 feet.
.WEDNESDAY NIGHT...
Weather.............Mostly cloudy with chance of showers and
thunderstorms, then mostly cloudy with showers
likely with a chance of thunderstorms after
midnight.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.
.THURSDAY...
Weather.............Partly sunny with chance of showers and
thunderstorms, then partly sunny in the
afternoon.
Sfc winds...........South 10 to 15 knots becoming west 5 to 10
knots in the afternoon.
100-ft winds........South 15 to 20 knots becoming west 10 to 15
knots in the afternoon.
Sig waves...........2 to 4 feet.
.THURSDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Light and variable winds.
100-ft winds........Light and variable winds.
Sig waves...........1 to 3 feet.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...Slight chance of showers in the morning. chance of
showers in the afternoon and evening. North winds 5 to 10 knots.
Waves 2 to 4 feet.
.SATURDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
.SUNDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
$$
LSZ261-010800-
MAFOR 0103/
Superior West 16510. A chance of showers Wednesday evening. Waves
2 feet or less.
Superior North Central 15510 11510 11420. Waves 1 to 3 feet.
Superior South Central 13510 11500 13410 11420. A chance of
showers Wednesday afternoon. A chance of showers and
thunderstorms Wednesday evening. Waves 1 to 3 feet overnight.
Waves 2 feet or less Wednesday and Wednesday evening.
Superior East 12510 11514 11504 11400 11300 12410. A chance of
showers and thunderstorms Wednesday evening. Waves 1 to 3 feet.
$$
Occasional waves will only be displayed when values meet or exceed 5 feet.
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