492
FZUS63 KMQT 042001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EDT Sat Apr 4 2026

For waters beyond 5 nautical miles of shore on Lake Superior.

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 29.7 inch low over northern Lake Michigan tracks over the Straits
of Mackinac this evening before further deepening to 29.4 inches
over western Quebec by Sunday morning. A weak 30.1 inch trough
passes over the lake Sunday night into Monday. Monday afternoon,
30.6 inch high pressure resides over North Dakota before moving over
Wisconsin Tuesday morning. The high shifts to the Lower Great Lakes
Tuesday night as a 29.5 inch low organizes along the
Montana/Saskatchewan border. This low moves over the Northwest Angle
Wednesday night before moving north of the lake through Thursday
morning.


LSZ162-050800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EDT Sat Apr 4 2026 /300 PM CDT Sat Apr 4 2026/

.LATE THIS AFTERNOON...Northeast winds 20 to 30 knots. Snow
showers, possibly mixed with rain. Waves 7 to 10 feet
occasionally to 13 feet subsiding to 5 to 8 feet occasionally to
10 feet.
.TONIGHT...North winds 15 to 25 knots becoming northwest 20 to
30 knots after midnight. A chance of snow showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots
in the afternoon. A slight chance of rain and snow showers by mid
afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots veering northwest after
midnight, then increasing to 20 to 30 knots late. A chance of
snow showers, possibly mixed with rain. Waves building to 2 to
4 feet.
.MONDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots by mid afternoon. A slight chance of snow showers
through early afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 1 to 3 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 10 to 20 knots becoming south
15 to 25 knots after midnight. A chance of snow showers, possibly
mixed with rain after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY...South winds 15 to 25 knots becoming west 20 to
30 knots. Rain showers likely, possibly mixed with snow showers,
then a chance of rain showers. Waves building to 4 to 7 feet
occasionally to 9 feet.
.THURSDAY...West winds 20 to 30 knots becoming east 10 to
20 knots. Waves subsiding to calm to 2 feet, then building to
2 to 4 feet.

$$

LSZ263-050800-
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-
400 PM EDT Sat Apr 4 2026

.LATE THIS AFTERNOON...Northeast winds 15 to 25 knots. Snow
showers, possibly mixed with rain and sleet. Waves 5 to 9 feet
occasionally to 11 feet.
.TONIGHT...North winds 15 to 25 knots becoming northwest 20 to
30 knots after midnight. Snow showers likely through midnight,
then a chance of snow showers after midnight. Waves subsiding to
3 to 6 feet occasionally to 8 feet, then building to 4 to 7 feet
occasionally to 9 feet.
.SUNDAY...Northwest winds 15 to 25 knots becoming west 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. A slight chance of snow showers by mid afternoon. Waves
subsiding to 1 to 3 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots becoming north 10 to
20 knots after midnight, then increasing to 20 to 30 knots late.
A chance of snow showers, possibly mixed with rain. Waves
subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Freezing spray. A chance of snow
showers. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
.TUESDAY...West winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. Waves subsiding to calm to 2 feet,
then building to 1 to 3 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of snow showers after midnight.
Waves building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...South winds 20 to 30 knots becoming west gales to
35 knots. Rain showers likely, possibly mixed with snow showers,
then a chance of rain showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.THURSDAY...West winds 20 to 30 knots becoming east 5 to
15 knots. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.

$$

LSZ264-050800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EDT Sat Apr 4 2026

.LATE THIS AFTERNOON...Northeast winds 15 to 25 knots. Snow
showers, possibly mixed with sleet. Waves 5 to 8 feet
occasionally to 10 feet.
.TONIGHT...North winds 15 to 25 knots increasing to 20 to
30 knots after midnight, then becoming northwest to 30 knots with
a few gale force gusts to 35 knots possible late. A slight chance
of sleet through midnight. Snow showers. Waves subsiding to 3 to
6 feet occasionally to 8 feet, then building to 7 to 10 feet
occasionally to 13 feet.
.SUNDAY...Northwest winds to 30 knots with a few gale force gusts
to 35 knots possible diminishing to 15 to 25 knots in the
afternoon, then becoming west 10 to 20 knots late. Waves
subsiding to 2 to 4 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots veering north after
midnight, then increasing to 20 to 30 knots late. A chance of
snow showers. Waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet.
.MONDAY...North winds 20 to 30 knots. A chance of snow showers
through early afternoon. Freezing spray. Waves building to 4 to
8 feet occasionally to 10 feet.
.MONDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Freezing spray through midnight.
Waves subsiding to 1 to 3 feet.
.TUESDAY...West winds 10 to 20 knots backing southwest by mid
afternoon. Waves 1 to 3 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots increasing to 20 to
30 knots after midnight. Waves building to 4 to 7 feet
occasionally to 9 feet.
.WEDNESDAY...South gales to 35 knots veering west. Rain and snow
showers likely. Waves building to 7 to 11 feet occasionally to
14 feet.
.THURSDAY...Northwest gales to 35 knots becoming east 5 to
15 knots. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.

$$

LSZ265-050800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EDT Sat Apr 4 2026

...GALE WARNING IN EFFECT FROM 3 AM EDT SUNDAY THROUGH SUNDAY
MORNING...

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Snow showers,
possibly mixed with rain. Waves 4 to 7 feet occasionally to
9 feet subsiding to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 15 to 25 knots increasing to gales to
40 knots after midnight. A slight chance of rain showers through
midnight. A chance of snow showers. Waves subsiding to 2 to
4 feet, then building to 6 to 9 feet occasionally to 11 feet.
.SUNDAY...Northwest gales to 35 knots diminishing to 15 to
25 knots. A slight chance of snow showers by mid afternoon. Waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 2 to 4 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots veering northwest after
midnight, then becoming north 15 to 25 knots late. A chance of
snow showers. Waves subsiding to calm to 2 feet, then building to
2 to 4 feet.
.MONDAY...North gales to 35 knots. Freezing spray. Snow showers
likely through early afternoon. A slight chance of snow showers
by mid afternoon. Waves building to 7 to 11 feet occasionally to
14 feet.
.MONDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Freezing spray through midnight.
Waves subsiding to 2 to 4 feet.
.TUESDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots increasing to gales
to 35 knots after midnight. Waves building to 4 to 7 feet
occasionally to 9 feet.
.WEDNESDAY...South gales to 40 knots becoming west gales to
35 knots. A chance of snow showers. Rain showers likely. Waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 5 to 8 feet occasionally to 10 feet.
.THURSDAY...Northwest winds 20 to 30 knots becoming east 15 to
25 knots. Waves subsiding to 1 to 3 feet, then building to 3 to
5 feet occasionally to 7 feet.

$$

LSZ266-050800-
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-
400 PM EDT Sat Apr 4 2026

...GALE WARNING IN EFFECT FROM 3 AM EDT SUNDAY THROUGH SUNDAY
MORNING...

.LATE THIS AFTERNOON...East winds 15 to 25 knots. Snow showers
likely, possibly mixed with rain showers and sleet. Waves 4 to
8 feet occasionally to 10 feet.
.TONIGHT...West winds 15 to 25 knots becoming northwest gales to
40 knots after midnight. A chance of rain and snow showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
8 to 11 feet occasionally to 14 feet.
.SUNDAY...Northwest gales to 35 knots diminishing to 15 to
25 knots. Waves building to 10 to 14 feet occasionally to
18 feet, then subsiding to 4 to 7 feet occasionally to 9 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots becoming north
15 to 25 knots late. A chance of snow showers. Waves subsiding to
1 to 3 feet, then building to 2 to 4 feet.
.MONDAY...North gales to 35 knots. Freezing spray. A chance of
snow showers. Waves building to 9 to 12 feet occasionally to
15 feet.
.MONDAY NIGHT...North winds 20 to 30 knots becoming northwest
15 to 25 knots after midnight. Freezing spray. Waves subsiding to
3 to 6 feet occasionally to 8 feet.
.TUESDAY...West winds 10 to 20 knots. Waves subsiding to 1 to
3 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots increasing to gales
to 35 knots after midnight. Waves building to 6 to 9 feet
occasionally to 11 feet.
.WEDNESDAY...South gales to 45 knots becoming southwest gales to
40 knots. Rain and snow showers likely, then a chance of rain
showers. Waves building to 10 to 14 feet occasionally to 18 feet,
then subsiding to 8 to 11 feet occasionally to 14 feet.
.THURSDAY...Northwest gales to 35 knots becoming east 15 to
25 knots. Waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet.

$$

LSZ267-050800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EDT Sat Apr 4 2026

...GALE WARNING IN EFFECT FROM 3 AM EDT SUNDAY THROUGH SUNDAY
MORNING...

.LATE THIS AFTERNOON...East winds 15 to 25 knots. A chance of
rain showers. Waves 3 to 6 feet occasionally to 8 feet subsiding
to 2 to 4 feet.
.TONIGHT...Southwest winds 15 to 25 knots becoming west 20 to
30 knots after midnight, then becoming northwest gales to
40 knots late. A chance of snow showers, possibly mixed with
rain. Waves subsiding to 1 to 3 feet, then building to 7 to
10 feet occasionally to 13 feet.
.SUNDAY...Northwest gales to 40 knots diminishing to 20 to
30 knots late. A slight chance of snow showers through early
afternoon. Waves building to 9 to 12 feet occasionally to
15 feet, then subsiding to 4 to 7 feet occasionally to 9 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight, then veering north late. A slight
chance of snow showers after midnight. Waves subsiding to 1 to
3 feet.
.MONDAY...North winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. A chance of snow showers. Freezing
spray by mid afternoon. Waves building to 7 to 10 feet
occasionally to 13 feet.
.MONDAY NIGHT...North winds 20 to 30 knots diminishing to 10 to
20 knots after midnight. Freezing spray. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.TUESDAY...West winds 10 to 20 knots. Waves subsiding to 2 to
4 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots increasing to 20 to
30 knots after midnight. Waves subsiding to 1 to 3 feet, then
building to 4 to 7 feet occasionally to 9 feet.
.WEDNESDAY...South gales to 40 knots veering southwest. Snow
showers likely. Rain showers. Waves building to 7 to 11 feet
occasionally to 14 feet.
.THURSDAY...Northwest winds 20 to 30 knots becoming east 10 to
20 knots. A chance of rain showers. Waves subsiding to 2 to
4 feet.

$$

LSZ261-050200-
MAFOR 0421/
Superior West 11147 11837 14730 12620. Waves 6 to 10 feet
subsiding to 4 to 7 feet tonight. Waves 3 to 6 feet subsiding to
1 to 3 feet Sunday.

Superior North Central 12137 11847 11857 12750 12730. Waves 5 to
9 feet tonight. Waves 7 to 10 feet subsiding to 3 to 5 feet
Sunday.

Superior South Central...GALE WARNING IN EFFECT...11220 11420
11740 13750 12740. A chance of rain showers early this evening,
then a chance of snow showers, rain showers and light freezing
rain this evening. A chance of snow showers overnight. Waves 4 to
7 feet subsiding to 3 to 5 feet, then building to 6 to 9 feet
tonight. Waves 8 to 12 feet subsiding to 5 to 8 feet Sunday.

Superior East...GALE WARNING IN EFFECT...11230 11320 11640 13750
12740. A chance of rain showers, light freezing rain and snow
showers early this evening, then a chance of rain showers this
evening. A chance of snow showers overnight. A chance of snow
showers Sunday morning. Waves 3 to 6 feet subsiding to 2 to 4
feet, then building to 4 to 7 feet tonight. Waves 8 to 12 feet
subsiding to 6 to 9 feet Sunday.

$$

WFO MQT

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weather.gov/mqt/glftable

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weather.gov/greatlakes