248
FZUS63 KMQT 052001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM EDT Fri Jun 5 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...

29.7 inch low over northern Ontario is extending 29.8 inch troughing
over the lake this afternoon. The low moves slowly east along the
northern shores of the lake the rest of the afternoon and evening
while deepening to 29.6 inches. By early Saturday morning, it tracks
into Quebec and then southeastwards towards the St. Lawrence Seaway.
Meanwhile, weak 29.9 inch ridging moves over Lake Superior Saturday
afternoon as a 29.3 inch low pressure forms over the Rockies.
Ridging over Lake Superior builds to 30.1 inches by Sunday as the
Colorado low weakens to 29.4 inches and moves into the western
Dakotas. By Monday afternoon, expect Lake Superior to be between a
29.8 inch trough over Minnesota and 30.2 inch high pressure over New
England. The troughing weakens to 29.9 inches before moving over
Lake Superior on Tuesday. Pressure continues to fall over Lake
Superior through Wednesday as a second Colorado low moves in,
reaching 29.6 inches by late Wednesday.



LSZ162-060800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Fri Jun 5 2026 /301 PM CDT Fri Jun 5 2026/

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Areas of
dense fog. A slight chance of showers and thunderstorms. Waves
calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots veering west after
midnight. A slight chance of showers and thunderstorms through
midnight. Patchy fog. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots backing southwest in the
afternoon, then backing east late. Patchy fog through early
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.SUNDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves building to 2 to 4 feet.
.SUNDAY NIGHT...Northeast winds 10 to 20 knots. Waves subsiding
to 1 to 3 feet.
.MONDAY...Northeast winds 10 to 20 knots. A chance of showers
through early afternoon. A chance of thunderstorms. Showers by
mid afternoon. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots. Showers likely
through midnight. A chance of thunderstorms. A chance of showers
after midnight. Waves calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots veering east. Waves calm
to 2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots. A chance of showers.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ263-060800-
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 Fri Jun 5 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT SATURDAY...

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Areas of
dense fog. A slight chance of showers and thunderstorms. Waves
calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots veering west after
midnight. A slight chance of rain showers through midnight.
Patchy dense fog. Waves calm to 2 feet.
.SATURDAY...West winds less than 10 knots backing southwest in
the afternoon, then increasing to 5 to 15 knots late. Patchy fog.
Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. Waves building to 2 to 4 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots becoming southeast 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A chance of showers. Waves building to 2 to
4 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots. Showers likely and
a chance of thunderstorms. Waves subsiding to 1 to 3 feet.
.TUESDAY...Northeast winds 5 to 15 knots veering east. Waves
subsiding to calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots veering southeast. A chance
of showers. Waves building to 1 to 3 feet.

$$

LSZ264-060800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Fri Jun 5 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT SATURDAY...

.LATE THIS AFTERNOON...South winds less than 10 knots. Areas of
dense fog. Waves calm to 2 feet.
.TONIGHT...Southwest winds less than 10 knots becoming west 5 to
15 knots after midnight, then becoming northwest less than
10 knots late. A slight chance of showers and thunderstorms
through midnight. Areas of dense fog. Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Areas of dense fog through early afternoon, then
patchy fog by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds less than 10 knots backing east
after midnight. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves calm to 2 feet.
.MONDAY...Southeast winds 10 to 20 knots. Waves building to 2 to
4 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. A chance of showers through
midnight. Showers likely after midnight. Waves 2 to 4 feet.
.TUESDAY...Southeast winds 5 to 15 knots diminishing to less than
10 knots. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots. A chance of showers.
Waves building to 2 to 4 feet.

$$

LSZ265-060800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Fri Jun 5 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT SATURDAY...

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Areas of dense
fog. A slight chance of showers and thunderstorms. Waves calm to
2 feet.
.TONIGHT...South winds 5 to 15 knots veering west after midnight.
Areas of dense fog. A slight chance of thunderstorms through
midnight. A slight chance of showers. Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots veering north late.
Patchy fog through early afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Northwest winds less than 10 knots veering east
after midnight, then increasing to 5 to 15 knots late. Waves calm
to 2 feet.
.SUNDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots. Waves subsiding
to calm to 2 feet, then building to 1 to 3 feet.
.MONDAY...Southeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY NIGHT...Southeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. A chance of showers through
midnight. Showers likely after midnight. Waves subsiding to 1 to
3 feet.
.TUESDAY...Southeast winds 5 to 15 knots. A chance of showers.
Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.

$$

LSZ266-060800-
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 Fri Jun 5 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT SATURDAY...

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Areas of dense
fog. A chance of showers and a slight chance of thunderstorms.
Waves calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots veering west after midnight,
then veering northwest late. Areas of dense fog. A slight chance
of thunderstorms through midnight. A slight chance of rain
showers. Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. Patchy fog. Waves calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight, then veering east late. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots. Waves building to
1 to 3 feet.
.MONDAY...Southeast winds 15 to 25 knots. Waves building to 2 to
4 feet.
.MONDAY NIGHT...Southeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. A chance of showers. Waves 2 to
4 feet.
.TUESDAY...Southeast winds 5 to 15 knots. A chance of showers.
Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. Waves building to 2 to 4 feet.

$$

LSZ267-060800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Fri Jun 5 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT SATURDAY...

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. A chance of
showers and a slight chance of thunderstorms. Waves calm to
2 feet.
.TONIGHT...South winds 5 to 15 knots veering northwest after
midnight, then backing west late. Areas of dense fog. A slight
chance of thunderstorms through midnight. A chance of rain
showers. Waves calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots. Patchy fog. Waves calm to
2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight, then veering east late. Waves calm
to 2 feet.
.SUNDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.MONDAY...Southeast winds 15 to 25 knots. Waves building to 2 to
4 feet.
.MONDAY NIGHT...Southeast winds 15 to 25 knots. A chance of
showers after midnight. Waves 2 to 4 feet.
.TUESDAY...Southeast winds 5 to 15 knots. A chance of showers.
Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ261-060200-
MAFOR 0521/
Superior West 11504 11500 12600 11700 11600 11500 11400. Waves 1
foot or less.

Superior North Central 12404 11504 11604 12704 11700 11600. Waves
1 foot or less.

Superior South Central 11204 11304 11504 11604 11704 13710. A
chance of showers this evening. Waves 1 foot or less.

Superior East 11304 11404 11604 11704 11604 11704 11710 11710
19714. A chance of showers this evening. Waves 2 feet or less.

$$

WFO MQT

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weather.gov/mqt/glftable

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weather.gov/greatlakes