367
FZUS63 KMQT 091401
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 AM EDT Tue Jun 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...

Weak ridging gives way to pressure falls to around 29.9 inches over
the lake by this afternoon as 30.2 inch high pressure moves off the
Mid Atlantic coast and troughing over the Rockies deepens to 29.4
inches over the Northern Plains. Pressure over the lake continues to
deepen to around 29.5 inches by late Wednesday as the low tracks
northeast along the Manitoba/Ontario border at 29.3 inches on
Wednesday evening. Pressure holds around 29.6 inches over Lake
Superior until late Thursday when another Colorado low lifts into
the Upper Great Lakes at around 29.5 inches. Weak ridging begins to
move over the lake on Friday, reaching 29.8 inches by Saturday
morning, 30.0 inches by Sunday morning, and lingering through the
day.



LSZ162-092000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 AM EDT Tue Jun 9 2026 /900 AM CDT Tue Jun 9 2026/

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM EDT /7 PM CDT/ THIS
EVENING...

.REST OF TODAY...Southeast winds 5 to 15 knots backing northeast
late. Areas of dense fog. Waves calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots. Areas of dense fog. A
slight chance of showers and thunderstorms after midnight. Waves
calm to 2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then becoming east 10 to 20 knots
late. Patchy fog. A chance of showers and thunderstorms. Some
thunderstorms may be severe. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. Showers likely and a chance of
thunderstorms through midnight. Some thunderstorms may be severe.
Waves 1 to 3 feet.
.THURSDAY...Southwest winds 15 to 25 knots. A chance of showers
by mid afternoon. Waves building to 3 to 5 feet occasionally to
7 feet.
.THURSDAY NIGHT...Southwest winds 15 to 25 knots veering west
after midnight. Waves subsiding to 2 to 4 feet.
.FRIDAY...Southwest winds 20 to 30 knots becoming west 15 to
25 knots. Waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 1 to 3 feet.
.SATURDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves building to 2 to 4 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-
1000 AM EDT Tue Jun 9 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.REST OF TODAY...East winds less than 10 knots backing northeast
in the afternoon, then increasing to 5 to 15 knots late. Areas of
dense fog by late morning, then patchy fog by mid afternoon.
Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots. Areas of dense fog. Waves
calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Patchy fog. A chance of showers and
thunderstorms. Some thunderstorms may be severe. Waves building
to 2 to 4 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Showers and a chance of thunderstorms through
midnight, then a slight chance of showers after midnight. Some
thunderstorms may be severe. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.THURSDAY...Southwest winds 15 to 25 knots. A chance of showers
by mid afternoon. Waves building to 3 to 5 feet occasionally to
7 feet.
.THURSDAY NIGHT...Southwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...Southwest winds 20 to 30 knots becoming west 15 to
25 knots. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ264-092000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 AM EDT Tue Jun 9 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.REST OF TODAY...East winds less than 10 knots increasing to 5 to
15 knots late. Patchy dense fog. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots. Areas of dense fog through
midnight, then widespread dense fog after midnight. Waves calm to
2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Areas of dense fog. A slight chance of
showers and thunderstorms by mid afternoon. Waves building to
2 to 4 feet.
.WEDNESDAY NIGHT...Southeast winds 15 to 25 knots becoming
southwest 10 to 20 knots after midnight. Showers and a chance of
thunderstorms through midnight, then a slight chance of showers
after midnight. Some thunderstorms may be severe. Waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.THURSDAY...Southwest winds 10 to 20 knots. A chance of showers
by mid afternoon. Waves 2 to 4 feet.
.THURSDAY NIGHT...Southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. A chance of showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...Southwest winds 20 to 30 knots becoming west 15 to
25 knots. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ265-092000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 AM EDT Tue Jun 9 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.REST OF TODAY...East winds 5 to 15 knots. A chance of showers by
late morning. Areas of dense fog. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots. Areas of dense fog through
midnight, then widespread dense fog after midnight. Waves calm to
2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots increasing to 20 to
30 knots. Areas of dense fog through early afternoon, then patchy
fog by mid afternoon. A slight chance of showers and
thunderstorms by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY NIGHT...Southeast winds 15 to 25 knots becoming
southwest 10 to 20 knots after midnight. Showers likely and a
chance of thunderstorms through midnight. Waves subsiding to 1 to
3 feet.
.THURSDAY...West winds 10 to 20 knots backing south by mid
afternoon. A chance of showers by mid afternoon. Waves subsiding
to calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 15 to 25 knots veering west
after midnight. A chance of showers. Waves building to 2 to
4 feet.
.FRIDAY...West winds 20 to 30 knots diminishing to 15 to
25 knots. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.SATURDAY...West winds 15 to 25 knots. Waves subsiding to calm to
2 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-
1000 AM EDT Tue Jun 9 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.REST OF TODAY...East winds 5 to 15 knots backing northeast late.
Areas of dense fog. A chance of showers. Waves calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots backing north late.
Areas of dense fog through midnight, then widespread dense fog
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots increasing to 15 to
25 knots. Widespread dense fog through early afternoon. Areas of
dense fog by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY NIGHT...Southeast winds 15 to 25 knots becoming
southwest 10 to 20 knots after midnight. Showers likely through
midnight. A chance of thunderstorms. A chance of showers after
midnight. Waves subsiding to 2 to 4 feet.
.THURSDAY...West winds 10 to 20 knots becoming south 5 to
15 knots by mid afternoon. A chance of showers by mid afternoon.
Waves subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. A chance of showers. Waves
building to 2 to 4 feet.
.FRIDAY...West winds 15 to 25 knots. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...West winds 15 to 25 knots veering northwest. Waves
subsiding to 1 to 3 feet.

$$

LSZ267-092000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 AM EDT Tue Jun 9 2026

.REST OF TODAY...East winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing northeast late. Patchy
dense fog. Showers and a slight chance of thunderstorms by late
morning. A chance of showers by mid afternoon. Waves calm to
2 feet.
.TONIGHT...Northeast winds 5 to 15 knots backing north late.
Areas of dense fog through midnight. Patchy fog after midnight. A
chance of showers. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots backing east in the
afternoon, then becoming southeast 10 to 20 knots late. Areas of
dense fog through early afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 knots becoming south
15 to 25 knots after midnight. Showers likely and a slight chance
of thunderstorms. Waves building to 2 to 4 feet.
.THURSDAY...West winds 5 to 15 knots backing southeast by mid
afternoon. A slight chance of showers by mid afternoon. Waves
subsiding to calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots veering
southwest after midnight. Showers likely through midnight, then a
chance of showers after midnight. Waves building to 1 to 3 feet.
.FRIDAY...West winds 10 to 20 knots. Waves building to 3 to
5 feet occasionally to 7 feet.
.SATURDAY...West winds 10 to 20 knots. Waves subsiding to 1 to
3 feet.

$$

LSZ261-092000-
MAFOR 0915/
Superior West 11204 12104 11110 11214 11114 12210. A chance of
showers Wednesday morning. Waves 2 feet or less.

Superior North Central 11200 19204 11200 11300 11200 19204 11204
11304 11204 11314. Waves 2 feet or less.

Superior South Central 12204 11100 19104 13204 11304 11324. A
chance of showers this afternoon. Waves 1 foot or less.

Superior East 11206 11200 13104 11100 19104 11800 11704. Waves 2
feet or less.

$$

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