FZUS63 KMQT 030215
GLFLS
Experimental Tabular Open Lake Forecast for Lake Superior
National Weather Service Negaunee MI
1015 PM EDT Wed Jul 2 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...A weak ridge of 30.0 inches builds in across the upper Great Lakes
tonight and remains across the area through Thursday evening. By
Friday morning, the ridging will build to 30.1 inches as it shifts
over southern Ontario and the Lower Great Lakes while a 29.3 inch
low over northern Saskatchewan drapes a trough of 29.6 inches over
the Northern Great Plains. By Saturday, the ridge will shift over
the East Coast and as the low moves over Hudson Bay, troughing of
29.8 inches approaches the western extent of Lake Superior. The
trough then proceeds over the lake through Sunday morning, with 30.1
inch high pressure building over the Plains. This high moves over
the Great Lakes basin for the early portions of next week.
LSZ162-030800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1002 PM EDT Wed Jul 2 2025 /902 PM CDT Wed Jul 2 2025/
.REST OF TONIGHT, North winds 5 to 15 knots veering northeast
after midnight. Haze. Waves calm to 2 feet.
.THURSDAY, Northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Haze through early afternoon. Waves
calm to 2 feet.
.THURSDAY NIGHT, Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY, East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A slight chance of showers and thunderstorms.
Waves calm to 2 feet.
.FRIDAY NIGHT, Southwest winds 10 to 20 knots. A chance of
showers through midnight. A chance of thunderstorms. Showers
likely after midnight. Waves calm to 2 feet.
.SATURDAY, Southwest winds 10 to 20 knots. Showers and a chance
of thunderstorms. Waves calm to 2 feet.
.SATURDAY NIGHT, North winds 10 to 20 knots. Showers likely
through midnight. A chance of thunderstorms. A chance of showers
after midnight. Waves calm to 2 feet.
.SUNDAY, East winds 10 to 20 knots becoming northeast 5 to
15 knots. Waves calm to 2 feet.
.MONDAY, East winds 5 to 15 knots backing northeast. Waves calm
to 2 feet.
LSZ162-030800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1015 PM EDT Wed Jul 2 2025 /915 PM CDT Wed Jul 2 2025/
.Overnight...
Weather.............Mostly clear with haze.
Sfc winds...........West 5 to 10 knots.
100-ft winds........West 10 to 15 knots.
Sig waves...........1 to 3 feet.
.THURSDAY...
Weather.............Sunny with haze, then mostly sunny in the
afternoon.
Sfc winds...........Northeast 5 to 10 knots.
100-ft winds........Northeast 10 to 15 knots.
Sig waves...........2 to 4 feet.
.THURSDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northeast 5 to 10 knots.
100-ft winds........Northeast 10 to 15 knots.
Sig waves...........2 to 4 feet.
.FRIDAY...
Weather.............Partly sunny.
Sfc winds...........Northeast 5 to 10 knots.
100-ft winds........Northeast 10 to 15 knots.
Sig waves...........2 to 4 feet.
.FRIDAY NIGHT...
Weather.............Mostly cloudy with chance of showers and
thunderstorms.
Sfc winds...........East 5 to 10 knots becoming south after
midnight.
100-ft winds........East 10 to 15 knots becoming south after
midnight.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...Chance of showers in the morning. chance of
thunderstorms. showers likely. Southeast winds 10 to 15 knots.
Waves 4 to 6 feet.
.SUNDAY...Chance of showers. North winds 10 to 15 knots. Waves
3 to 5 feet.
.MONDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
$$
LSZ263-030800-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
1015 PM EDT Wed Jul 2 2025
.Overnight...
Weather.............Mostly clear with haze, then mostly clear after
midnight.
Sfc winds...........North 5 to 10 knots.
100-ft winds........North 10 to 15 knots.
Sig waves...........2 to 4 feet.
.THURSDAY...
Weather.............Sunny with haze, then sunny in the afternoon.
Sfc winds...........Northeast 5 to 10 knots.
100-ft winds........Northeast 10 to 15 knots.
Sig waves...........1 to 3 feet.
.THURSDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.FRIDAY...
Weather.............Partly sunny.
Sfc winds...........East 5 to 10 knots.
100-ft winds........East 10 to 15 knots.
Sig waves...........2 to 4 feet.
.FRIDAY NIGHT...
Weather.............Mostly cloudy with chance of showers and
thunderstorms.
Sfc winds...........East 10 to 15 knots becoming south after
midnight.
100-ft winds........East 15 to 20 knots becoming south after
midnight.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...Chance of showers in the morning. chance of
thunderstorms. showers likely. Southeast winds 10 to 15 knots.
Waves 4 to 6 feet.
.SUNDAY...Chance of showers. North winds 10 to 15 knots. Waves
3 to 5 feet.
.MONDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
$$
LSZ264-030800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1015 PM EDT Wed Jul 2 2025
.Overnight...
Weather.............Mostly clear.
Sfc winds...........North 5 to 10 knots.
100-ft winds........North 10 to 15 knots.
Sig waves...........2 to 4 feet.
.THURSDAY...
Weather.............Sunny.
Sfc winds...........Light and variable winds becoming east 5 to 10
knots in the afternoon.
100-ft winds........Light and variable winds becoming east 10 to 15
knots in the afternoon.
Sig waves...........1 to 3 feet.
.THURSDAY NIGHT...
Weather.............Mostly clear.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........1 to 3 feet.
.FRIDAY...
Weather.............Partly sunny.
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 afternoon.
.FRIDAY NIGHT...
Weather.............Mostly cloudy with chance of showers.
Sfc winds...........Southeast 10 to 15 knots becoming south after
midnight.
100-ft winds........Southeast 15 to 20 knots becoming south after
midnight.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 5 feet.
.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...Chance of showers in the morning. chance of
thunderstorms. showers likely. Southeast winds 10 to 15 knots.
Waves 4 to 6 feet.
.SUNDAY...Chance of showers. North winds 10 to 15 knots. Waves
3 to 5 feet.
.MONDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
$$
LSZ265-030800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1015 PM EDT Wed Jul 2 2025
.Overnight...
Weather.............Partly cloudy.
Sfc winds...........Northeast 5 to 10 knots late in the evening
becoming light and variable.
100-ft winds........Northeast 10 to 15 knots late in the evening
becoming light and variable.
Sig waves...........2 feet or less.
.THURSDAY...
Weather.............Sunny.
Sfc winds...........Light and variable winds.
100-ft winds........Light and variable winds.
Sig waves...........2 feet or less.
.THURSDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........East 5 to 10 knots.
100-ft winds........East 10 to 15 knots.
Sig waves...........2 feet or less.
.FRIDAY...
Weather.............Mostly sunny.
Sfc winds...........Southeast 10 to 15 knots.
100-ft winds........Southeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.FRIDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...Chance of showers in the morning. chance of
thunderstorms. showers likely. Southeast winds 10 to 15 knots.
Waves 4 to 6 feet.
.SUNDAY...Chance of showers. North winds 10 to 15 knots. Waves
3 to 5 feet.
.MONDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
$$
LSZ266-030800-
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 Wed Jul 2 2025
.Overnight...
Weather.............Mostly clear, then haze and patchy dense fog
after midnight.
Sfc winds...........Light and variable winds becoming north 5 to 10
knots after midnight.
100-ft winds........Light and variable winds becoming north 10 to
15 knots after midnight.
Sig waves...........2 to 4 feet.
.THURSDAY...
Weather.............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.
.THURSDAY NIGHT...
Weather.............Partly 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.
.FRIDAY...
Weather.............Mostly sunny.
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 afternoon.
.FRIDAY NIGHT...
Weather.............Mostly cloudy.
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.
.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...Chance of showers in the morning. chance of
thunderstorms. showers likely. Southeast winds 10 to 15 knots.
Waves 4 to 6 feet.
.SUNDAY...Chance of showers. North winds 10 to 15 knots. Waves
3 to 5 feet.
.MONDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
$$
LSZ267-030800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1015 PM EDT Wed Jul 2 2025
.Overnight...
Weather.............Partly cloudy, then haze after midnight.
Sfc winds...........Light and variable winds becoming northwest 5
to 10 knots after midnight.
100-ft winds........Light and variable winds becoming northwest 10
to 15 knots after midnight.
Sig waves...........2 to 4 feet.
.THURSDAY...
Weather.............Sunny.
Sfc winds...........North 5 to 10 knots.
100-ft winds........North 10 to 15 knots.
Sig waves...........1 to 3 feet.
.THURSDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northwest 5 to 10 knots becoming southeast
after midnight.
100-ft winds........Northwest 10 to 15 knots becoming southeast
after midnight.
Sig waves...........2 feet or less.
.FRIDAY...
Weather.............Mostly sunny.
Sfc winds...........Southeast 10 to 15 knots.
100-ft winds........Southeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.FRIDAY NIGHT...
Weather.............Partly cloudy, then mostly cloudy with chance
of showers after midnight.
Sfc winds...........Southeast 15 to 20 knots.
100-ft winds........Southeast 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...Chance of showers in the morning. chance of
thunderstorms. showers likely. Southeast winds 10 to 15 knots.
Waves 4 to 6 feet.
.SUNDAY...Chance of showers. North winds 10 to 15 knots. Waves
3 to 5 feet.
.MONDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
$$
LSZ261-030800-
MAFOR 0303/
Superior West 11800 14100 11100 11110 11210. Waves 2 feet or
less.
Superior North Central 11800 11100 11600 11100 11200 12300 11310.
Waves 1 foot or less.
Superior South Central 11100 12800 12100 12210 11300. Waves 1
foot or less.
Superior East 12700 12800 13700 11600. Waves 1 foot or less.
$$
Occasional waves will only be displayed when values meet or exceed 5 feet.
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