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FZUS63 KMQT 291417
GLFLS
Experimental Tabular Open Lake Forecast for Lake Superior
National Weather Service Negaunee MI
1017 AM EDT Wed Apr 29 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...Weak ridging of 30.0 inches over Lake Superior this morning persists
between 30.0 and 30.1 inches through early Saturday as a 30.3 inch
high slowly shifts east from the Canadian Prairies to northwest
Ontario and Hudson Bay. Weak troughing of 29.8 inches moves over the
lake Saturday night and strengthens to 29.5 inches through Monday as
the parent low pressure deepens to 29.4 inches over northern Ontario
and James Bay.
LSZ162-292000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 AM EDT Wed Apr 29 2026 /901 AM CDT Wed Apr 29 2026/
.REST OF TODAY, West winds 5 to 15 knots backing southwest in
the afternoon, then veering west late. A slight chance of rain
showers. A chance of snow showers by mid afternoon. Waves calm to
2 feet.
.TONIGHT, Northwest winds 5 to 15 knots veering north after
midnight. A slight chance of rain and snow showers through
midnight. Waves calm to 2 feet.
.THURSDAY, North winds 5 to 15 knots backing southwest in the
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT, Northwest winds 5 to 15 knots veering north
after midnight. Waves calm to 2 feet.
.FRIDAY, North winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT, Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY, Southwest winds 5 to 15 knots veering west. Waves
calm to 2 feet.
.SUNDAY, West winds 5 to 15 knots veering northwest. Waves calm
to 2 feet.
LSZ162-292000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1017 AM EDT Wed Apr 29 2026 /917 AM CDT Wed Apr 29 2026/
.This Afternoon...
Weather.............Mostly sunny, then chance of snow showers and
slight chance of showers in the afternoon.
Sfc winds...........Light and variable winds becoming south 5 to 10
knots in the afternoon.
100-ft winds........Light and variable winds becoming south 10 to
15 knots in the afternoon.
Sig waves...........2 feet or less.
.TONIGHT...
Weather.............Mostly cloudy with a slight chance of rain and
snow showers, then mostly cloudy 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 feet or less.
.THURSDAY...
Weather.............Partly 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.............Mostly cloudy.
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 feet or less.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...North winds 10 to 15 knots. Waves 4 to 6 feet.
.SATURDAY...West winds 10 to 15 knots. Waves 3 to 5 feet.
.SUNDAY...West winds 10 to 15 knots. Waves 2 to 4 feet.
$$
LSZ263-292000-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
1017 AM EDT Wed Apr 29 2026
.This Afternoon...
Weather.............Mostly sunny.
Sfc winds...........North 5 to 10 knots.
100-ft winds........North 10 to 15 knots.
Sig waves...........1 to 3 feet.
.TONIGHT...
Weather.............Mostly cloudy with a slight chance of rain and
snow showers, then mostly cloudy after
midnight.
Sfc winds...........Southwest 5 to 10 knots.
100-ft winds........Southwest 10 to 15 knots.
Sig waves...........1 to 3 feet.
.THURSDAY...
Weather.............Partly sunny.
Sfc winds...........North 10 to 15 knots.
100-ft winds........North 15 to 20 knots.
Sig waves...........2 to 4 feet.
.THURSDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Southwest 5 to 10 knots becoming northwest
after midnight.
100-ft winds........Southwest 10 to 15 knots becoming northwest
after midnight.
Sig waves...........1 to 3 feet.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...North winds 10 to 15 knots. Waves 4 to 6 feet.
.SATURDAY...West winds 10 to 15 knots. Waves 3 to 5 feet.
.SUNDAY...West winds 10 to 15 knots. Waves 2 to 4 feet.
$$
LSZ264-292000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1017 AM EDT Wed Apr 29 2026
.This Afternoon...
Weather.............Mostly sunny.
Sfc winds...........North 5 to 10 knots.
100-ft winds........North 10 to 15 knots.
Sig waves...........2 to 4 feet.
.TONIGHT...
Weather.............Mostly cloudy.
Sfc winds...........West 5 to 10 knots becoming northwest 10 to 15
knots after midnight.
100-ft winds........West 10 to 15 knots becoming northwest 15 to 20
knots after midnight.
Sig waves...........1 to 3 feet.
.THURSDAY...
Weather.............Partly sunny.
Sfc winds...........North 10 to 15 knots.
100-ft winds........North 15 to 20 knots.
Sig waves...........2 to 4 feet.
.THURSDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northwest 10 to 15 knots.
100-ft winds........Northwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...North winds 10 to 15 knots. Waves 4 to 6 feet.
.SATURDAY...West winds 10 to 15 knots. Waves 3 to 5 feet.
.SUNDAY...West winds 10 to 15 knots. Waves 2 to 4 feet.
$$
LSZ265-292000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1017 AM EDT Wed Apr 29 2026
.This Afternoon...
Weather.............Partly sunny.
Sfc winds...........Northwest 5 to 10 knots.
100-ft winds........Northwest 10 to 15 knots.
Sig waves...........2 to 4 feet.
.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........North 5 to 10 knots becoming northwest after
midnight.
100-ft winds........North 10 to 15 knots becoming northwest after
midnight.
Sig waves...........1 to 3 feet.
.THURSDAY...
Weather.............Mostly sunny.
Sfc winds...........Northwest 10 to 15 knots.
100-ft winds........Northwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet in the afternoon.
.THURSDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northwest 10 to 15 knots.
100-ft winds........Northwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet in the evening.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...North winds 10 to 15 knots. Waves 4 to 6 feet.
.SATURDAY...West winds 10 to 15 knots. Waves 3 to 5 feet.
.SUNDAY...West winds 10 to 15 knots. Waves 2 to 4 feet.
$$
LSZ266-292000-
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-
1017 AM EDT Wed Apr 29 2026
.This Afternoon...
Weather.............Mostly sunny.
Sfc winds...........Northwest 10 to 15 knots.
100-ft winds........Northwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet late in the morning.
.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northwest 10 to 15 knots.
100-ft winds........Northwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
.THURSDAY...
Weather.............Mostly sunny.
Sfc winds...........North 10 to 15 knots.
100-ft winds........North 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.
.THURSDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Northwest 15 to 20 knots.
100-ft winds........Northwest 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...North winds 10 to 15 knots. Waves 4 to 6 feet.
.SATURDAY...West winds 10 to 15 knots. Waves 3 to 5 feet.
.SUNDAY...West winds 10 to 15 knots. Waves 2 to 4 feet.
$$
LSZ267-292000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1017 AM EDT Wed Apr 29 2026
.This Afternoon...
Weather.............Partly sunny.
Sfc winds...........Northwest 10 to 15 knots.
100-ft winds........Northwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet late in the morning.
.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northwest 10 to 15 knots.
100-ft winds........Northwest 15 to 20 knots.
Sig waves...........2 to 4 feet.
.THURSDAY...
Weather.............Partly sunny.
Sfc winds...........North 15 to 20 knots.
100-ft winds........North 20 to 25 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet in the afternoon.
.THURSDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Northwest 15 to 20 knots.
100-ft winds........Northwest 20 to 25 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...North winds 10 to 15 knots. Waves 4 to 6 feet.
.SATURDAY...West winds 10 to 15 knots. Waves 3 to 5 feet.
.SUNDAY...West winds 10 to 15 knots. Waves 2 to 4 feet.
$$
LSZ261-292000-
MAFOR 2915/
Superior West 11600 11500 11600 11700 14800. Waves 1 foot or
less.
Superior North Central 14700 11710 13810. Waves 2 feet or less.
Superior South Central 11700 12800 11810 12710 11810 11820. Waves
2 feet or less.
Superior East 11700 14710 11710 12810. Waves 1 to 3 feet.
$$
Occasional waves will only be displayed when values meet or exceed 5 feet.
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