681
FZUS63 KMQT 280135
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
935 PM 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 before moving
into the Lower Great Lakes Monday. Expect pressure falls Tuesday
before a surface low moving through Ontario drags a 29.7 inch
trough across the lake Tuesday afternoon and evening.

LSZ162-280945-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
935 PM EDT Thu Jun 27 2024 /835 PM CDT Thu Jun 27 2024/

.REST OF TONIGHT...East winds 5 to 15 knots increasing to 10 to
20 knots late. A slight chance of showers and thunderstorms after
midnight. Waves calm to 2 feet.
.FRIDAY...South winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon, then becoming southwest 10 to 20 knots late.
Showers through early afternoon. A chance of thunderstorms. A
chance of showers by mid afternoon. 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...Northwest winds 15 to 25 knots veering north by mid
afternoon. A chance of showers. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots. 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.
.TUESDAY...Southwest winds 15 to 25 knots becoming west 10 to
20 knots. A chance of showers. Waves subsiding to calm to 2 feet.

$$

LSZ263-280945-
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-
935 PM EDT Thu Jun 27 2024

.REST OF TONIGHT...Southeast winds 5 to 15 knots veering south
late. A chance of showers after midnight. Waves calm to 2 feet
building to 1 to 3 feet.
.FRIDAY...South winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon, then diminishing to 10 to 20 knots late.
Showers through early afternoon. A slight chance of
thunderstorms. A chance of showers by mid afternoon. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight, then veering west late. Showers
likely through midnight. A chance of thunderstorms. A slight
chance of showers after midnight. Waves subsiding to calm to
2 feet.
.SATURDAY...Northwest winds 10 to 20 knots veering north by mid
afternoon. A slight chance of showers and thunderstorms. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots becoming west
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots backing south after
midnight. Waves calm to 2 feet.
.MONDAY...South winds 10 to 20 knots. Showers. Waves building to
2 to 4 feet.
.TUESDAY...South winds 15 to 25 knots becoming southwest 5 to
15 knots. A chance of showers. Waves subsiding to 1 to 3 feet.

$$

LSZ264-280945-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
935 PM EDT Thu Jun 27 2024

.REST OF TONIGHT...South winds 5 to 15 knots. A chance of showers
after midnight. Waves calm to 2 feet building to 2 to 4 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 10 to 20 knots diminishing to 5 to
15 knots after midnight, then backing north late. Showers through
midnight. A chance of thunderstorms. A slight chance of showers
after midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...Northwest winds 10 to 20 knots veering north by mid
afternoon. A slight chance of showers. Waves building to 2 to
4 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots backing southwest after
midnight. Waves calm to 2 feet.
.MONDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. Showers likely. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...South winds 15 to 25 knots becoming southwest 10 to
20 knots. A chance of showers. Waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 1 to 3 feet.

$$

LSZ265-280945-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
935 PM EDT Thu Jun 27 2024

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

$$

LSZ266-280945-
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-
935 PM EDT Thu Jun 27 2024

.REST OF TONIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A slight chance of showers after
midnight. Waves calm to 2 feet building to 2 to 4 feet.
.FRIDAY...South winds 15 to 25 knots increasing to 20 to 30 knots
late. A chance of showers through early afternoon, then showers
likely and a slight chance of thunderstorms by mid afternoon.
Waves building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then veering southwest late. Showers
through midnight. A chance of thunderstorms. A chance of showers
after midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A slight chance of thunderstorms
through early afternoon. A slight chance of showers. Waves
building to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots. Waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.SUNDAY...Northwest winds 10 to 20 knots backing west by mid
afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. Waves building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...South winds 20 to 30 knots diminishing to 10 to
20 knots. Showers likely. A chance of showers. Waves building to
3 to 6 feet occasionally to 8 feet, then subsiding to 1 to
3 feet.

$$

LSZ267-280945-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
935 PM EDT Thu Jun 27 2024

.REST OF TONIGHT...Southeast winds 5 to 15 knots veering south
after midnight, then 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 late. 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 slight chance of thunderstorms
through early afternoon. A chance of showers. Waves building to
2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots. Waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.SUNDAY...Northwest winds 10 to 20 knots backing west by mid
afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots backing west after
midnight. Waves calm to 2 feet.
.MONDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots. A chance of showers. Waves building to 2 to 4 feet.
.TUESDAY...South winds 20 to 30 knots diminishing to 10 to
20 knots. Showers likely, then a chance of showers. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
calm to 2 feet.

$$
LSZ261-280945-
MAFOR 2803/
Superior West 13310 12426 11420 11520 11426. A chance of
thunderstorms Friday afternoon and Friday evening. Waves 1 feet
or less overnight building to 2 to 4 feet Friday.

Superior North Central 12410 12420 12336 11436 11426. A chance of
thunderstorms Friday evening. Waves 1 to 3 feet overnight
building to 3 to 5 feet Friday.

Superior South Central 11310 13420 11436 11336 12436. A chance of
thunderstorms Friday evening. Waves 1 to 3 feet overnight. Waves
2 to 4 feet Friday and Friday evening.

Superior East 11310 11410 13420 11336 12436. Waves 1 to 3 feet
building to 3 to 5 feet Friday.

$$

BW

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

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weather.gov/greatlakes