235
FZUS63 KMQT 272001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM EDT Mon Apr 27 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 29.5 inch low over southeast Minnesota continues northeast this
afternoon, reaching the Upper Peninsula late this evening and
crosses the lake at 29.4 inches by early Tuesday morning. The low
reaches James Bay Tuesday afternoon while 30.1 inch high pressure
builds over the Canadian Prairie. As the low departs northeast, the
high builds to 30.2 inches while a 29.8 inch low passes south of the
Lower Great Lakes Wednesday. By Thursday night, the 30.2 inch high
will span from Hudson Bay to the Central Plains while low pressure
of 29.5 inches will be off Cape Cod. The high then shifts directly
over Lake Superior by Saturday ahead of the arrival of a weak trough
Saturday night into Sunday.


LSZ162-280800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Mon Apr 27 2026 /301 PM CDT Mon Apr 27 2026/

.LATE THIS AFTERNOON...Northeast winds 10 to 20 knots. Rain
showers. Waves 3 to 5 feet occasionally to 7 feet.
.TONIGHT...East winds 10 to 20 knots becoming west 15 to 25 knots
after midnight, then increasing to 20 to 30 knots late. Rain
showers through midnight, then a chance of rain showers after
midnight. Waves building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...West winds 20 to 30 knots diminishing to 10 to
20 knots late. A slight chance of rain showers through early
afternoon. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 1 to 3 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding
to calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...North winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...North winds 5 to 15 knots backing northwest. Waves calm
to 2 feet.
.SATURDAY...South winds 5 to 15 knots veering west. Waves calm to
2 feet.

$$

LSZ263-280800-
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-
401 PM EDT Mon Apr 27 2026

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY
AFTERNOON...

.LATE THIS AFTERNOON...East winds 15 to 25 knots. Rain showers
and a slight chance of thunderstorms. Waves 3 to 6 feet
occasionally to 8 feet building to 4 to 7 feet occasionally to
9 feet.
.TONIGHT...East winds 15 to 25 knots veering west after midnight,
then increasing to 20 to 30 knots late. Rain showers likely
through midnight, then a chance of rain showers after midnight.
Waves building to 6 to 9 feet occasionally to 11 feet, then
subsiding to 4 to 7 feet occasionally to 9 feet.
.TUESDAY...West gales to 35 knots diminishing to 15 to 25 knots
late. A chance of rain showers through early afternoon. Waves
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots. Waves subsiding
to calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds less than 10 knots increasing to
5 to 15 knots after midnight. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds less than 10 knots becoming
north 5 to 15 knots after midnight. Waves calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots backing northwest. Waves calm
to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ264-280800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Mon Apr 27 2026

...GALE WARNING IN EFFECT THROUGH TUESDAY AFTERNOON...

.LATE THIS AFTERNOON...East winds 20 to 30 knots. Rain showers
and a slight chance of thunderstorms. Waves 4 to 8 feet
occasionally to 10 feet.
.TONIGHT...Southeast gales to 35 knots diminishing to 20 to
30 knots after midnight, then veering west late. Rain showers and
a slight chance of thunderstorms through midnight, then a chance
of rain showers after midnight. Waves building to 8 to 11 feet
occasionally to 14 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.
.TUESDAY...West gales to 40 knots diminishing to 20 to 30 knots
late. A chance of rain showers through early afternoon. Waves
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to 4 to 7 feet occasionally to 9 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots backing northwest by mid
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 northwest. Waves calm
to 2 feet.
.SATURDAY...West winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ265-280800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Mon Apr 27 2026

...GALE WARNING IN EFFECT THROUGH TUESDAY AFTERNOON...

.LATE THIS AFTERNOON...Southeast gales to 35 knots. A chance of
showers and a slight chance of thunderstorms. Waves 3 to 6 feet
occasionally to 8 feet building to 4 to 7 feet occasionally to
9 feet.
.TONIGHT...Southeast gales to 35 knots diminishing to 20 to
30 knots after midnight, then becoming west gales to 35 knots
late. A chance of rain showers. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY...West gales to 40 knots. A slight chance of rain
showers through early afternoon. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots veering north by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...North winds 10 to 20 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots. Waves building
to 1 to 3 feet.
.FRIDAY...North winds 10 to 20 knots backing northwest. Waves
building to 2 to 4 feet, then subsiding to calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots backing west. Waves
subsiding to calm to 2 feet.

$$

LSZ266-280800-
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-
401 PM EDT Mon Apr 27 2026

...GALE WARNING IN EFFECT THROUGH TUESDAY AFTERNOON...

.LATE THIS AFTERNOON...Southeast gales to 40 knots. A chance of
rain showers and a slight chance of thunderstorms. Waves 5 to
8 feet occasionally to 10 feet building to 7 to 10 feet
occasionally to 13 feet.
.TONIGHT...Southeast gales to 40 knots becoming southwest gales
to 35 knots late. Rain showers and a slight chance of
thunderstorms through midnight, then a chance of rain showers
after midnight. Waves building to 9 to 12 feet occasionally to
15 feet, then subsiding to 6 to 9 feet occasionally to 11 feet.
.TUESDAY...West gales to 40 knots. A slight chance of rain
showers through early afternoon. Waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 8 to 11 feet
occasionally to 14 feet.
.TUESDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
10 to 20 knots. Waves subsiding to 3 to 5 feet occasionally to
7 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. Waves calm to 2 feet.
.THURSDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Waves building to 1 to 3 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Waves building to 2 to 4 feet.
.FRIDAY...North winds 10 to 20 knots backing northwest. Waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.SATURDAY...Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.

$$

LSZ267-280800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Mon Apr 27 2026

...GALE WARNING IN EFFECT THROUGH TUESDAY AFTERNOON...

.LATE THIS AFTERNOON...Southeast gales to 40 knots. A chance of
showers. Waves 5 to 8 feet occasionally to 10 feet building to
7 to 10 feet occasionally to 13 feet.
.TONIGHT...Southeast gales to 45 knots becoming south gales to
35 knots late. Rain showers and a slight chance of thunderstorms
through midnight, then a chance of rain showers after midnight.
Waves building to 8 to 11 feet occasionally to 14 feet, then
subsiding to 4 to 7 feet occasionally to 9 feet.
.TUESDAY...West gales to 40 knots. A chance of rain showers
through early afternoon. Waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 9 to 12 feet
occasionally to 15 feet.
.TUESDAY NIGHT...West winds 20 to 30 knots becoming northwest
15 to 25 knots after midnight, then diminishing to 10 to 20 knots
late. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 10 to 20 knots. Waves calm to
2 feet.
.THURSDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves building to 1 to 3 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet.
.FRIDAY...Northwest winds 10 to 20 knots veering north. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.SATURDAY...Northwest winds 10 to 20 knots. Waves building to
2 to 4 feet, then subsiding to calm to 2 feet.

$$

LSZ261-280200-
MAFOR 2721/
Superior West...GALE WARNING IN EFFECT...11236 11226 11626 11636
14640. Waves 3 to 5 feet tonight. Waves 5 to 9 feet subsiding to
4 to 7 feet Tuesday.

Superior North Central...GALE WARNING IN EFFECT...11346 11356
11340 11430 11640 13650. Waves 5 to 8 feet building to 7 to 11
feet tonight. Waves 6 to 9 feet building to 7 to 11 feet Tuesday.

Superior South Central...GALE WARNING IN EFFECT...11340 11356
11350 11440 14650. Waves 5 to 8 feet building to 5 to 9 feet
tonight. Waves 5 to 8 feet building to 7 to 11 feet Tuesday.

Superior East...GALE WARNING IN EFFECT...11360 11366 12356 11440
13650. Waves 6 to 9 feet building to 8 to 12 feet tonight. Waves
6 to 10 feet building to 10 to 14 feet Tuesday.

$$

WFO MQT

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weather.gov/mqt/glftable

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weather.gov/greatlakes