330
FZUS63 KMQT 090800
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 AM EDT Mon Mar 9 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 29.0 inch low moves into northwest Quebec tonight into Monday as a
secondary 29.2 inch low trails behind near the northern shores of
Lake Superior. The low exits the area Monday afternoon before being
replaced by a 30.4 inch high over northern Ontario Tuesday. The high
slowly moves into Quebec Tuesday night as 29.6 low pressure moves
into the lower Midwest. This low moves through the Lower Great Lakes
Wednesday at 29.5 inches. Thursday, Lake Superior will be situated
between a 29.3 inch low over southern Quebec, a 29.4 inch low over
North Dakota, a 30.3 inch high over the Lower Mississippi River
Valley, and a 30.1 inch ridge over Hudson Bay. The Dakotas low
arrives near the lake Friday morning, then moves near the Lower
Great Lakes Friday night. A 30.2 inch ridge will then follow across
the Upper Great Lakes Saturday.


LSZ162-092000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 AM EDT Mon Mar 9 2026 /300 AM CDT Mon Mar 9 2026/

.EARLY THIS MORNING...West winds 20 to 30 knots. Waves 3 to
6 feet occasionally to 8 feet.
.TODAY...West winds 15 to 25 knots diminishing to 5 to 15 knots.
Waves subsiding to calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots becoming northeast 10 to
20 knots after midnight. A chance of snow showers. Waves calm to
2 feet.
.TUESDAY...Northeast winds 15 to 25 knots veering east late. A
slight chance of snow showers. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots becoming northeast
10 to 20 knots after midnight. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots becoming northwest
5 to 15 knots by mid afternoon. Waves subsiding to calm to
2 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...Southeast winds 10 to 20 knots increasing to gales to
35 knots. A chance of snow showers, then snow showers, possibly
mixed with rain. Waves building to 5 to 8 feet occasionally to
10 feet.
.FRIDAY...Northwest gales to 35 knots diminishing to 10 to
20 knots. Waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to calm to 2 feet.

$$

LSZ263-092000-
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 AM EDT Mon Mar 9 2026

.EARLY THIS MORNING...West winds 20 to 30 knots. Waves 3 to
6 feet occasionally to 8 feet building to 4 to 7 feet
occasionally to 9 feet.
.TODAY...West winds 20 to 30 knots diminishing to 5 to 15 knots.
Waves subsiding to 1 to 3 feet.
.TONIGHT...North winds 10 to 20 knots becoming northeast 15 to
25 knots after midnight. A chance of snow showers. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.TUESDAY...Northeast winds 15 to 25 knots veering east late. A
slight chance of snow showers. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...East gales to 35 knots backing northeast after
midnight. A chance of snow showers. Waves subsiding to 1 to
3 feet.
.WEDNESDAY...Northeast gales to 35 knots becoming north 15 to
25 knots by mid afternoon. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...Southeast winds 15 to 25 knots increasing to gales to
35 knots. A chance of rain showers, then snow showers, possibly
mixed with rain. Waves building to 12 to 17 feet occasionally to
21 feet.
.FRIDAY...Northwest gales to 35 knots diminishing to 15 to
25 knots. A chance of snow showers. Waves subsiding to 2 to
4 feet.

$$

LSZ264-092000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 AM EDT Mon Mar 9 2026

...GALE WARNING IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...

.EARLY THIS MORNING...Southwest winds 20 to 30 knots. Isolated
rain showers. Waves 3 to 6 feet occasionally to 8 feet building
to 4 to 7 feet occasionally to 9 feet.
.TODAY...West winds 20 to 30 knots becoming northwest 10 to
20 knots late. Waves building to 5 to 8 feet occasionally to
10 feet, then subsiding to 2 to 4 feet.
.TONIGHT...North winds 5 to 15 knots veering northeast after
midnight. A chance of snow showers. Waves subsiding to 1 to
3 feet.
.TUESDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. A slight chance of snow showers through early afternoon.
Waves 1 to 3 feet.
.TUESDAY NIGHT...East winds 10 to 20 knots. A chance of snow
showers. Waves building to 2 to 4 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots becoming north 15 to
25 knots by mid afternoon. Freezing spray by mid afternoon. Waves
2 to 4 feet.
.WEDNESDAY NIGHT...North winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Freezing spray through midnight.
Waves subsiding to 1 to 3 feet.
.THURSDAY...Southeast winds 15 to 25 knots increasing to gales to
40 knots. A chance of snow showers. Waves subsiding to calm to
2 feet, then building to 12 to 17 feet occasionally to 21 feet.
.FRIDAY...North gales to 45 knots becoming northwest gales to
35 knots. A chance of snow showers. Waves subsiding to 5 to
8 feet occasionally to 10 feet.

$$

LSZ265-092000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 AM EDT Mon Mar 9 2026

...GALE WARNING IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...

.EARLY THIS MORNING...Southwest gales to 35 knots. Isolated rain
showers. Waves 3 to 6 feet occasionally to 8 feet.
.TODAY...West gales to 35 knots diminishing to 20 to 30 knots in
the afternoon, then becoming northwest 15 to 25 knots late. Waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
1 to 3 feet.
.TONIGHT...Northwest winds 10 to 20 knots veering northeast late.
A chance of snow showers. Waves subsiding to calm to 2 feet, then
building to 1 to 3 feet.
.TUESDAY...Northeast winds 15 to 25 knots. A slight chance of
snow showers. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots. A chance of snow
showers. Waves building to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...Northeast winds 20 to 30 knots backing north by mid
afternoon. Freezing spray. A chance of snow showers. Waves
building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY NIGHT...North winds 20 to 30 knots becoming northwest
10 to 20 knots after midnight. Freezing spray. Waves subsiding to
2 to 4 feet.
.THURSDAY...Southeast winds 15 to 25 knots increasing to gales to
40 knots. Snow showers likely. Waves subsiding to calm to 2 feet,
then building to 11 to 15 feet occasionally to 19 feet.
.FRIDAY...North gales to 45 knots becoming northwest gales to
35 knots. A chance of snow showers. Waves building to 15 to
20 feet occasionally to 25 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.

$$

LSZ266-092000-
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 AM EDT Mon Mar 9 2026

...GALE WARNING IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...

.EARLY THIS MORNING...Southwest gales to 35 knots. Scattered rain
showers. Waves 4 to 8 feet occasionally to 10 feet.
.TODAY...West gales to 35 knots becoming northwest 20 to 30 knots
in the afternoon, then diminishing to 15 to 25 knots late. Waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...North winds 10 to 20 knots veering northeast late. A
chance of snow showers. Waves subsiding to 1 to 3 feet.
.TUESDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. A slight chance of snow showers. Waves
building to 2 to 4 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots. A chance of snow
showers. Freezing spray after midnight. Waves building to 3 to
5 feet occasionally to 7 feet.
.WEDNESDAY...Northeast winds 20 to 30 knots backing north by mid
afternoon. Freezing spray. A chance of snow showers. Waves
building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY NIGHT...North winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Freezing spray. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.THURSDAY...North winds 15 to 25 knots becoming southeast gales
to 45 knots. A chance of snow showers. Waves subsiding to 1 to
3 feet, then building to 12 to 17 feet occasionally to 21 feet.
.FRIDAY...North gales to 45 knots becoming northwest gales to
40 knots. A chance of snow showers. Waves building to 15 to
20 feet occasionally to 25 feet, then subsiding to 9 to 12 feet
occasionally to 15 feet.

$$

LSZ267-092000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 AM EDT Mon Mar 9 2026

.EARLY THIS MORNING...Southwest winds to 30 knots with a few gale
force gusts to 35 knots possible. Scattered rain showers. Waves
3 to 6 feet occasionally to 8 feet building to 5 to 8 feet
occasionally to 10 feet.
.TODAY...Southwest winds 20 to 30 knots veering west in the
afternoon, then becoming northwest 15 to 25 knots late. Waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...Northwest winds 10 to 20 knots becoming north 5 to
15 knots after midnight, then becoming northeast 10 to 20 knots
late. A chance of snow showers. Waves subsiding to 1 to 3 feet.
.TUESDAY...Northeast winds 10 to 20 knots. A slight chance of
snow showers. Waves 1 to 3 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots backing northeast
after midnight. A chance of snow showers. Waves building to 2 to
4 feet.
.WEDNESDAY...Northeast winds 15 to 25 knots becoming north 20 to
30 knots by mid afternoon. Freezing spray. A chance of snow
showers. Waves building to 4 to 7 feet occasionally to 9 feet.
.WEDNESDAY NIGHT...North winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Freezing spray. Waves subsiding to
2 to 4 feet.
.THURSDAY...North winds 10 to 20 knots becoming southeast gales
to 40 knots. A chance of snow showers. Waves subsiding to calm to
2 feet, then building to 9 to 12 feet occasionally to 15 feet.
.FRIDAY...North gales to 40 knots. A chance of snow showers.
Waves building to 10 to 14 feet occasionally to 18 feet, then
subsiding to 9 to 12 feet occasionally to 15 feet.

$$

LSZ261-091400-
MAFOR 0909/
Superior West 11640 12630 11620 11710 11800 11810 11110. A chance
of snow showers tonight. Waves 3 to 6 feet subsiding to 2 to 4
feet today. Waves 1 to 3 feet tonight.

Superior North Central...GALE WARNING IN EFFECT...11540 12640
11730 11720 11810 12110. A chance of snow showers overnight.
Waves 5 to 8 feet today. Waves 3 to 5 feet subsiding to 2 to 4
feet tonight.

Superior South Central...GALE WARNING IN EFFECT...11540 19546
11650 11640 11740 11720 11710 11810 11110. A chance of snow
showers overnight. Waves 3 to 6 feet building to 5 to 8 feet
today. Waves 3 to 5 feet subsiding to 1 to 3 feet tonight.

Superior East...GALE WARNING IN EFFECT...11540 19546 11550 11640
11740 11720 12810 11110. A chance of snow showers overnight.
Waves 5 to 9 feet building to 7 to 10 feet today. Waves 5 to 8
feet subsiding to 2 to 4 feet tonight.

$$

WFO MQT

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weather.gov/mqt/glftable

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weather.gov/greatlakes