915
FZUS63 KMQT 282002
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM EDT Tue Apr 28 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 far northeastern Ontario this afternoon reaches
James Bay by this evening, then continues into northern Quebec on
Wednesday. Weak ridging of 30.1 inches builds over the lake on
Wednesday between 30.3 inch high pressure over the Canadian Prairie
and 29.7 inch troughing over the Eastern Seaboard. High pressure
gradually strengthens to 30.2 inches over the lake through Friday as
the Canadian high shifts east to northern Ontario and Hudson Bay.
Weak troughing of 29.9 inches moves over the lake late on Saturday
and strengthens to 29.7 inches through Sunday as low pressure
deepens to 29.6 inches over James Bay.


LSZ162-290800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Tue Apr 28 2026 /301 PM CDT Tue Apr 28 2026/

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TONIGHT...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 southwest in
the afternoon, then veering west late. A slight chance of rain
showers. A slight chance of snow showers by mid afternoon. Waves
calm to 2 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots increasing to 10 to
20 knots late. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots backing southwest 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 veering south by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots veering northwest.
Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots veering northwest. Waves calm
to 2 feet.

$$

LSZ263-290800-
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 Tue Apr 28 2026

.LATE THIS AFTERNOON...West winds 15 to 25 knots. Waves 4 to
7 feet occasionally to 9 feet subsiding to 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...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 in the
afternoon. A slight chance of snow showers by mid afternoon.
Waves calm to 2 feet.
.WEDNESDAY NIGHT...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 west 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 west by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots veering north after
midnight. 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.

$$

LSZ264-290800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Tue Apr 28 2026

...GALE WARNING IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON...

.LATE THIS AFTERNOON...Northwest winds 20 to 30 knots. Waves 4 to
8 feet occasionally to 10 feet.
.TONIGHT...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...North winds 5 to 15 knots backing west late. Waves
calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. A slight chance of snow showers through 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 by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ265-290800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Tue Apr 28 2026

...GALE WARNING IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON...

.LATE THIS AFTERNOON...West winds to 30 knots with a few gale
force gusts to 35 knots possible. Waves 4 to 7 feet occasionally
to 9 feet subsiding to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots veering north in the
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots backing northwest
after midnight, then increasing to 10 to 20 knots late. Waves
calm to 2 feet.
.THURSDAY...North 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 10 to 20 knots veering north
after midnight. Waves subsiding to calm to 2 feet, then building
to 1 to 3 feet.
.FRIDAY...North winds 15 to 25 knots backing northwest by mid
afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. Waves subsiding to calm to 2 feet,
then building to 1 to 3 feet.
.SATURDAY...Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.SUNDAY...Northwest winds 15 to 25 knots becoming west 10 to
20 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.

$$

LSZ266-290800-
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 Tue Apr 28 2026

...GALE WARNING IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.LATE THIS AFTERNOON...West gales to 35 knots. Waves 10 to
14 feet occasionally to 18 feet subsiding to 8 to 11 feet
occasionally to 14 feet.
.TONIGHT...Northwest winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 10 to 20 knots veering north
late. Waves calm to 2 feet.
.THURSDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Waves building to 2 to 4 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots veering north
after midnight. Waves 2 to 4 feet.
.FRIDAY...North winds 15 to 25 knots backing northwest by mid
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots veering north
after midnight. Waves subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to 1 to 3 feet.
.SUNDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.

$$

LSZ267-290800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Tue Apr 28 2026

...GALE WARNING IN EFFECT UNTIL 6 PM EDT THIS EVENING...

.LATE THIS AFTERNOON...West gales to 40 knots. Waves 10 to
14 feet occasionally to 18 feet subsiding to 9 to 12 feet
occasionally to 15 feet.
.TONIGHT...Northwest gales to 35 knots diminishing to 10 to
20 knots. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 10 to 20 knots veering north
late. Waves calm to 2 feet.
.THURSDAY...North winds 10 to 20 knots becoming northwest 15 to
25 knots by mid afternoon. Waves building to 2 to 4 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Waves 2 to 4 feet.
.FRIDAY...North winds 15 to 25 knots becoming northwest 20 to
30 knots by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to 1 to 3 feet.
.SUNDAY...Northwest winds 10 to 20 knots. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.

$$

LSZ261-290200-
MAFOR 2821/
Superior West 11630 11710 14700 11600 11500. Waves 3 to 5 feet
subsiding to 1 foot or less tonight. Waves 1 foot or less
Wednesday.

Superior North Central 11740 12720 12710 11810 11710 11700. Waves
5 to 8 feet subsiding to 1 to 3 feet tonight. Waves 2 feet or
less Wednesday.

Superior South Central...GALE WARNING IN EFFECT...11640 11730
12720 13710 11810. Waves 5 to 9 feet subsiding to 2 to 4 feet
tonight. Waves 1 to 3 feet Wednesday.

Superior East...GALE WARNING IN EFFECT...11650 11740 11730 11720
14710. Waves 10 to 14 feet subsiding to 4 to 6 feet tonight.
Waves 3 to 5 feet subsiding to 2 to 3 feet Wednesday.

$$

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