441
FZUS63 KMQT 270741
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
341 AM EDT Thu Jun 27 2024

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 30.0 inch high pressure ridge over the Upper Great
Lakes today will shift into Lower Great Lakes tonight and into New
England on Friday in response to a 29.5 inch low pressure
approaching from the Northern Plains. This low will then weaken
29.6 inches as it tracks across Lake Superior Friday night and
Saturday morning. As the low heads toward southern Quebec on
Saturday, 30.2 inch high pressure will build over the Northern
Plains. The high will then build to 30.3 inches as it shifts east,
reaching the Western Great Lakes Sunday evening and the Central
Great Lakes on Monday.

LSZ162-271545-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
341 AM EDT Thu Jun 27 2024 /241 AM CDT Thu Jun 27 2024/

.EARLY THIS MORNING...West winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...Southwest winds 5 to 15 knots backing south late. Waves
calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots backing east after
midnight, then increasing to 10 to 20 knots late. A slight chance
of showers through midnight, then showers likely and a slight
chance of thunderstorms after midnight. Waves calm to 2 feet.
.FRIDAY...South winds 10 to 20 knots veering southwest late.
Showers and a chance of thunderstorms. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots veering west after
midnight. Showers likely through midnight. A chance of
thunderstorms. A slight chance of showers after midnight. Waves
subsiding to calm to 2 feet.
.SATURDAY...West winds 15 to 25 knots veering northwest by mid
afternoon. A chance of showers. Waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots backing south. Waves calm
to 2 feet.
.MONDAY...East winds 10 to 20 knots becoming southeast 15 to
25 knots. A chance of showers, then showers. Waves building to
2 to 4 feet.

$$

LSZ263-271545-
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-
341 AM EDT Thu Jun 27 2024

.EARLY THIS MORNING...West winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...Southwest winds 5 to 15 knots. Waves building to 1 to
3 feet.
.TONIGHT...South winds 5 to 15 knots backing southeast after
midnight, then veering south late. A chance of showers after
midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...South winds 10 to 20 knots diminishing to 5 to 15 knots
late. Showers and a slight chance of thunderstorms. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots veering west after
midnight. Showers through midnight. A chance of thunderstorms. A
chance of showers after midnight. Waves subsiding to calm to
2 feet.
.SATURDAY...West winds 15 to 25 knots veering northwest by mid
afternoon. A chance of showers. Waves building to 2 to 4 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots. Showers. Waves building to 2 to 4 feet.

$$

LSZ264-271545-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
341 AM EDT Thu Jun 27 2024

.EARLY THIS MORNING...West winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...West winds 5 to 15 knots backing southwest in the
afternoon. Waves calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots. A slight chance of showers
after midnight. Waves building to 1 to 3 feet.
.FRIDAY...South winds 10 to 20 knots becoming southeast 15 to
25 knots in the afternoon, then veering south late. Showers. A
slight chance of thunderstorms by mid afternoon. Waves building
to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots backing north after
midnight. Showers through midnight. A chance of thunderstorms. A
chance of showers after midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...Northwest winds 15 to 25 knots. A chance of showers.
Waves building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
.SUNDAY...West winds 5 to 15 knots backing southwest. Waves
subsiding to calm to 2 feet.
.MONDAY...Southeast winds 5 to 15 knots increasing to 15 to
25 knots. Showers likely. Waves building to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ265-271545-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
341 AM EDT Thu Jun 27 2024

.EARLY THIS MORNING...West winds 10 to 20 knots. Waves calm to
2 feet.
.TODAY...West winds 10 to 20 knots backing south late. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south after
midnight. Waves calm to 2 feet.
.FRIDAY...South winds 10 to 20 knots becoming southeast 15 to
25 knots in the afternoon, then becoming south 10 to 20 knots
late. Showers likely. A slight chance of thunderstorms by mid
afternoon. Waves building to 2 to 4 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Showers through midnight. A chance of
thunderstorms. A chance of showers after midnight. Waves
subsiding to calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots becoming northwest 20 to
30 knots by mid afternoon. A chance of showers. Waves building to
1 to 3 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots. Waves 1 to
3 feet.
.SUNDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves subsiding to calm to 2 feet.
.MONDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. Showers likely. Waves building to 1 to 3 feet.

$$

LSZ266-271545-
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-
341 AM EDT Thu Jun 27 2024

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves 1 to
3 feet.
.TODAY...West winds 5 to 15 knots backing southwest late. Waves
subsiding to calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots
after midnight. Waves building to 1 to 3 feet.
.FRIDAY...South winds 15 to 25 knots. A chance of showers through
early afternoon, then showers and a slight chance of
thunderstorms by mid afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots. Showers and a chance
of thunderstorms. Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots becoming northwest 15 to
25 knots by mid afternoon. A chance of showers. Waves building to
3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots. Waves building
to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves subsiding to calm to 2 feet.
.MONDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ267-271545-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
341 AM EDT Thu Jun 27 2024

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TODAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
late. Waves subsiding to calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots
late. Waves calm to 2 feet.
.FRIDAY...South winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. A slight chance of showers through early
afternoon, then showers likely by mid afternoon. Waves building
to 2 to 4 feet.
.FRIDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Showers and a chance of thunderstorms.
Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of showers and thunderstorms.
Waves building to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots. Waves building
to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.MONDAY...East winds 5 to 15 knots becoming southeast 10 to
20 knots. A chance of showers. Waves building to 2 to 4 feet.

$$

LSZ261-271545-
MAFOR 2709/
Superior West 12600 12510 11400 11300 12310. A chance of showers
overnight. Waves 2 feet or less.

Superior North Central 12610 13510 13410. Waves 1 to 2 feet.

Superior South Central 13610 11600 11300 12310 11410. Waves 2
feet or less.

Superior East 11710 14600 11500 11400 11410. Waves 1 to 3 feet.

$$

Voss

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes