FZUS63 KMQT 060815
GLFLS
Experimental Tabular Open Lake Forecast for Lake Superior
National Weather Service Negaunee MI
415 AM EDT Wed Aug 6 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...Expansive high pressure averaging 30.3 inches will encompass much of
eastern Canada and the Great Lakes through today. This high will
shift to New England on Thursday and Friday while low pressure
averaging 29.6 inches emerges off the Rockies into the northern
Plains. The low strengthens to 29.5 inches as it enters the Canadian
Prairies over the weekend, while high pressure at 30.2 inches
remains over much of the Eastern Seaboard.
LSZ162-062000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 AM EDT Wed Aug 6 2025 /301 AM CDT Wed Aug 6 2025/
.EARLY THIS MORNING, Southeast winds 10 to 20 knots. Haze. A
slight chance of showers. Waves calm to 2 feet.
.TODAY, Southeast winds 10 to 20 knots backing east in the
afternoon. Haze. A chance of showers. A slight chance of
thunderstorms by mid afternoon. Waves calm to 2 feet.
.TONIGHT, East winds 10 to 20 knots becoming south 5 to 15 knots
after midnight. Haze. A chance of showers and thunderstorms.
Waves calm to 2 feet.
.THURSDAY, Southwest winds 10 to 20 knots backing south in the
afternoon, then diminishing to 5 to 15 knots late. A slight
chance of showers and thunderstorms through early afternoon.
Waves calm to 2 feet.
.THURSDAY NIGHT, South winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY, Southeast winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT, East winds 10 to 20 knots veering south after
midnight. A chance of showers and thunderstorms. Waves calm to
2 feet.
.SATURDAY, Southwest winds 10 to 20 knots. A chance of
thunderstorms. A chance of showers. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.SUNDAY, Southwest winds 10 to 20 knots veering west. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
LSZ162-061400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
416 AM EDT Wed Aug 6 2025 /316 AM CDT Wed Aug 6 2025/
.Today...
Weather.............Cloudy with haze with a chance of showers, then
mostly cloudy with haze and slight chance of
showers 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 with haze with possible showers
and thunderstorms, then mostly cloudy with
haze, chance of showers and thunderstorms after
midnight.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.THURSDAY...
Weather.............Partly sunny with haze, then mostly sunny in
the afternoon.
Sfc winds...........East 5 to 10 knots becoming south in the
afternoon.
100-ft winds........East 10 to 15 knots becoming south in the
afternoon.
Sig waves...........2 to 4 feet.
.THURSDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Southeast 5 to 10 knots in the evening becoming
light and variable.
100-ft winds........Southeast 10 to 15 knots in the evening
becoming light and variable.
Sig waves...........1 to 3 feet.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...Chance of thunderstorms after midnight. Southeast winds
10 to 15 knots. Waves 3 to 5 feet.
.SATURDAY...Chance of showers. chance of thunderstorms in the
afternoon and evening. Southeast winds 10 to 15 knots. Waves 4 to
6 feet.
.SUNDAY...Chance of showers. South winds 10 to 15 knots. Waves
3 to 5 feet.
$$
LSZ263-061400-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
416 AM EDT Wed Aug 6 2025
.Today...
Weather.............Mostly cloudy with haze and slight chance of
showers, then mostly cloudy with haze in the
afternoon.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........2 to 4 feet.
.TONIGHT...
Weather.............Mostly cloudy with haze and slight chance of
showers, then mostly cloudy with haze, chance
of showers and thunderstorms after midnight.
Sfc winds...........East 10 to 15 knots becoming southeast after
midnight.
100-ft winds........East 15 to 20 knots becoming southeast after
midnight.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet.
.THURSDAY...
Weather.............Mostly sunny.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.
.THURSDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........South 5 to 10 knots.
100-ft winds........South 10 to 15 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...Chance of thunderstorms after midnight. Southeast winds
10 to 15 knots. Waves 3 to 5 feet.
.SATURDAY...Chance of showers. chance of thunderstorms in the
afternoon and evening. Southeast winds 10 to 15 knots. Waves 4 to
6 feet.
.SUNDAY...Chance of showers. South winds 10 to 15 knots. Waves
3 to 5 feet.
$$
LSZ264-061400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
416 AM EDT Wed Aug 6 2025
.Today...
Weather.............Mostly cloudy with haze.
Sfc winds...........Southeast 10 to 15 knots.
100-ft winds........Southeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.TONIGHT...
Weather.............Mostly cloudy with haze, then mostly cloudy
with haze with possible showers and
thunderstorms after midnight.
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.
.THURSDAY...
Weather.............Partly sunny with haze with a chance of
showers, then mostly sunny in the afternoon.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.
.THURSDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........South 5 to 10 knots.
100-ft winds........South 10 to 15 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...Chance of thunderstorms after midnight. Southeast winds
10 to 15 knots. Waves 3 to 5 feet.
.SATURDAY...Chance of showers. chance of thunderstorms in the
afternoon and evening. Southeast winds 10 to 15 knots. Waves 4 to
6 feet.
.SUNDAY...Chance of showers. South winds 10 to 15 knots. Waves
3 to 5 feet.
$$
LSZ265-061400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
416 AM EDT Wed Aug 6 2025
.Today...
Weather.............Mostly cloudy with haze.
Sfc winds...........Southeast 10 to 15 knots.
100-ft winds........Southeast 15 to 20 knots.
Sig waves...........1 to 3 feet.
.TONIGHT...
Weather.............Mostly cloudy with haze, then mostly cloudy
with haze, slight chance of showers and
thunderstorms after midnight.
Sfc winds...........Southeast 5 to 10 knots.
100-ft winds........Southeast 10 to 15 knots.
Sig waves...........1 to 3 feet.
.THURSDAY...
Weather.............Partly sunny with haze, then mostly sunny in
the afternoon.
Sfc winds...........South 5 to 10 knots.
100-ft winds........South 10 to 15 knots.
Sig waves...........1 to 3 feet.
.THURSDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........East 5 to 10 knots in the evening becoming
light and variable.
100-ft winds........East 10 to 15 knots in the evening becoming
light and variable.
Sig waves...........2 feet or less.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...Chance of thunderstorms after midnight. Southeast winds
10 to 15 knots. Waves 3 to 5 feet.
.SATURDAY...Chance of showers. chance of thunderstorms in the
afternoon and evening. Southeast winds 10 to 15 knots. Waves 4 to
6 feet.
.SUNDAY...Chance of showers. South winds 10 to 15 knots. Waves
3 to 5 feet.
$$
LSZ266-061400-
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-
416 AM EDT Wed Aug 6 2025
.Today...
Weather.............Partly sunny with haze.
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 with haze, then mostly cloudy
with haze, slight chance of showers and
thunderstorms after midnight.
Sfc winds...........Southeast 10 to 15 knots.
100-ft winds........Southeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.THURSDAY...
Weather.............Partly sunny with haze, then mostly sunny in
the afternoon.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.
.THURSDAY NIGHT...
Weather.............Partly 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...
.FRIDAY...Chance of thunderstorms after midnight. Southeast winds
10 to 15 knots. Waves 3 to 5 feet.
.SATURDAY...Chance of showers. chance of thunderstorms in the
afternoon and evening. Southeast winds 10 to 15 knots. Waves 4 to
6 feet.
.SUNDAY...Chance of showers. South winds 10 to 15 knots. Waves
3 to 5 feet.
$$
LSZ267-061400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
416 AM EDT Wed Aug 6 2025
.Today...
Weather.............Mostly sunny with haze.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........1 to 3 feet.
.TONIGHT...
Weather.............Mostly cloudy with haze.
Sfc winds...........Southeast 10 to 15 knots.
100-ft winds........Southeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.THURSDAY...
Weather.............Partly sunny with haze, then partly sunny in
the afternoon.
Sfc winds...........Southeast 10 to 15 knots.
100-ft winds........Southeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.THURSDAY NIGHT...
Weather.............Mostly cloudy, then chance of showers after
midnight.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...Chance of thunderstorms after midnight. Southeast winds
10 to 15 knots. Waves 3 to 5 feet.
.SATURDAY...Chance of showers. chance of thunderstorms in the
afternoon and evening. Southeast winds 10 to 15 knots. Waves 4 to
6 feet.
.SUNDAY...Chance of showers. South winds 10 to 15 knots. Waves
3 to 5 feet.
$$
LSZ261-061400-
MAFOR 0609/
Superior West 11320 12310 12210 12310 11410. A chance of showers
this evening, then a chance of showers and thunderstorms
overnight. Waves 1 to 2 feet.
Superior North Central 13310 14320 11420. A chance of showers
overnight. Waves 1 to 3 feet.
Superior South Central 11300 11310 14320 12410. Waves around 1
foot.
Superior East 13300 11200 11210 13310. Waves 2 feet or less.
$$
Occasional waves will only be displayed when values meet or exceed 5 feet.
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