935
FZUS63 KMQT 280204 CCA
GLFLS

Open Lake Forecast for Lake Superior...CORRECTED
National Weather Service Marquette MI
1004 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 29.4 inch low over the U.P. lifts into Lake Superior tonight as it
deepens to 29.3 inches. The low exits the lake and reaches James Bay
Tuesday afternoon while 30.1 inch high pressure continues over the
Canadian Prairie. As the low continues departing to the northeast,
the high builds to 30.2 inches while a 29.8 inch low expands over
the Eastern Seaboard on Wednesday. By Thursday night, the 30.2 inch
high spans from Hudson Bay to the Central Plains while the low
pressure of now 29.6 inches is just off Cape Cod. High pressure
ridging over Lake Superior reaches its zenith of 30.2 inches by
Saturday, before a weak trough of around 29.8 inches passes through
the lake Saturday night into Sunday.


LSZ162-280800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1004 PM EDT Mon Apr 27 2026 /904 PM CDT Mon Apr 27 2026/

.REST OF TONIGHT...Northwest winds 15 to 25 knots backing west
after midnight, then increasing to 20 to 30 knots late. Rain
showers likely. Waves 3 to 6 feet occasionally to 8 feet.
.TUESDAY...West winds 20 to 30 knots diminishing to 10 to
20 knots late. 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-
1004 PM EDT Mon Apr 27 2026

...GALE WARNING IN EFFECT FROM 5 AM EDT TUESDAY THROUGH TUESDAY
AFTERNOON...

.REST OF TONIGHT...Southeast winds 15 to 25 knots veering west
after midnight, then increasing to 20 to 30 knots late. A chance
of rain showers. Waves 5 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 slight 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-
1004 PM EDT Mon Apr 27 2026

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

.REST OF TONIGHT...Southeast gales to 35 knots diminishing to
20 to 30 knots after midnight, then veering west late. Patchy fog
by midnight. Areas of dense fog after midnight. A chance of rain
showers. Waves 8 to 11 feet occasionally to 14 feet subsiding to
5 to 8 feet occasionally to 10 feet.
.TUESDAY...West gales to 40 knots diminishing to 20 to 30 knots
late. Patchy fog through early afternoon. A slight 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-
1004 PM EDT Mon Apr 27 2026

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

.REST OF TONIGHT...Southeast winds 20 to 30 knots becoming west
gales to 35 knots late. Areas of fog. A chance of rain showers.
Waves 6 to 9 feet occasionally to 11 feet subsiding to 4 to
7 feet occasionally to 9 feet.
.TUESDAY...West gales to 40 knots. Patchy fog through early
afternoon. 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-
1004 PM EDT Mon Apr 27 2026

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

.REST OF TONIGHT...Southeast gales to 40 knots becoming southwest
gales to 35 knots late. Patchy dense fog. A chance of rain
showers. Waves 9 to 12 feet occasionally to 15 feet subsiding to
6 to 9 feet occasionally to 11 feet.
.TUESDAY...West gales to 40 knots. Patchy fog through early
afternoon. 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-
1004 PM EDT Mon Apr 27 2026

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

.REST OF TONIGHT...Southeast gales to 45 knots becoming south
gales to 35 knots late. A chance of rain showers and a slight
chance of thunderstorms. Waves 8 to 11 feet occasionally to
14 feet subsiding to 4 to 7 feet occasionally to 9 feet.
.TUESDAY...West gales to 40 knots. Patchy fog through early
afternoon. 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.

$$

LSZ261-280800-
MAFOR 2803/
Superior West...GALE WARNING IN EFFECT...11620 11636 11646 19656
13640 19650 11630 11710. Waves 3 to 5 feet overnight. Waves 5 to 9
feet subsiding to 4 to 7 feet Tuesday. Waves 3 to 5 feet subsiding to
1 to 3 feet Tuesday evening.

Superior North Central...GALE WARNING IN EFFECT...11340 11434
11644 13650 11740 11720. A chance of rain showers overnight and
Tuesday morning. Waves 7 to 11 feet overnight. Waves 6 to 9 feet
building to 7 to 11 feet Tuesday. Waves 5 to 8 feet subsiding to
3 to 6 feet Tuesday evening.

Superior South Central...GALE WARNING IN EFFECT...11350 11444
14650 11640 11630. A chance of rain showers Tuesday morning.
Waves 5 to 9 feet overnight. Waves 5 to 8 feet building to 7 to
11 feet Tuesday. Waves 5 to 8 feet subsiding to 3 to 5 feet
Tuesday evening.

Superior East...GALE WARNING IN EFFECT...12350 11440 14650 11640.
A chance of showers overnight. A chance of rain showers Tuesday
morning. Waves 8 to 12 feet overnight. Waves 6 to 10 feet
building to 10 to 14 feet Tuesday. Waves 10 to 13 feet subsiding
to 7 to 10 feet Tuesday evening.

$$

WFO MQT

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes