341
FZUS63 KMQT 090801
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 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 around 30.0 inches lingers over Lake Superior this
morning. Then, 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 29.5 inch 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 through Wednesday as the low tracks
northeast along the Manitoba/Ontario line at 29.3 inches by
Wednesday evening. Pressure holds to around 29.6 inches over Lake
Superior through the end of the week as another Colorado low lifts
into the Upper Great Lakes at around 29.5 inches late Thursday. Weak
ridging of 30.0 inches could return to Lake Superior by the end of
the day Saturday.



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

...DENSE FOG ADVISORY IN EFFECT UNTIL 2 PM EDT /1 PM CDT/ THIS
AFTERNOON...

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Widespread
dense fog. Waves calm to 2 feet.
.TODAY...Northeast winds 5 to 15 knots veering east in the
afternoon, then backing northeast late. Areas of dense fog. Waves
calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots. Patchy fog through
midnight, then areas of dense fog after midnight. 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 dense fog through early afternoon. 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-
400 AM EDT Tue Jun 9 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...

.EARLY THIS MORNING...East winds less than 10 knots. Areas of
dense fog. A chance of showers. Waves calm to 2 feet.
.TODAY...Northeast winds less than 10 knots increasing to 5 to
15 knots in the afternoon. A slight chance of showers through
early afternoon. Areas of dense fog through early afternoon, then
patchy fog by mid afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots. Patchy fog through midnight,
then areas of dense fog after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Areas of dense fog through early
afternoon. 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-
400 AM EDT Tue Jun 9 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...

.EARLY THIS MORNING...Southeast winds less than 10 knots. Areas
of dense fog. Showers likely and a slight chance of
thunderstorms. Waves calm to 2 feet.
.TODAY...East winds less than 10 knots increasing to 5 to
15 knots late. A chance of showers through early afternoon. Areas
of dense fog through early afternoon, then patchy fog by mid
afternoon. 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. Widespread dense fog through early
afternoon. 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-
400 AM EDT Tue Jun 9 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...

.EARLY THIS MORNING...East winds 5 to 15 knots. Patchy dense fog.
Showers likely and a slight chance of thunderstorms. Waves calm
to 2 feet.
.TODAY...East winds 5 to 15 knots. Showers likely through early
afternoon. 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. Widespread dense fog through early 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-
400 AM EDT Tue Jun 9 2026

.EARLY THIS MORNING...Southeast winds 5 to 15 knots. Patchy fog.
Showers likely and a slight chance of thunderstorms. Waves calm
to 2 feet.
.TODAY...East winds 5 to 15 knots backing northeast late. Patchy
fog through early afternoon, then areas of dense fog by mid
afternoon. Showers likely through early afternoon, then a slight
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, 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. 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-
400 AM EDT Tue Jun 9 2026

.EARLY THIS MORNING...Southeast winds 10 to 20 knots. Patchy fog.
A chance of showers and a slight chance of thunderstorms. Waves
calm to 2 feet.
.TODAY...Southeast winds 10 to 20 knots backing east in the
afternoon, then becoming northeast 5 to 15 knots late. Patchy fog
through early afternoon, then areas of dense fog by mid
afternoon. Showers and a slight chance of thunderstorms through
early afternoon, then 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. 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. 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.

$$

LSZ261-091400-
MAFOR 0909/
Superior West 12104 11204 11104 12110 11210 11114. Waves 2 feet
or less.

Superior North Central 11306 19304 11204 11200 19204 12200 12204
11304. Waves 1 to 2 feet.

Superior South Central 12206 19204 11200 19204 11204 11104 13204.
Waves 1 foot or less.

Superior East 11310 11306 11206 19204 11200 14104. Waves 1 to 3
feet today. Waves 1 foot or less tonight.

$$

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