943
FZUS63 KMQT 281951
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
351 PM EDT Fri Jun 28 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 29.5 inch low pressure over northern Minnesota
will weaken to 29.6 inches as it tracks across northern Lake
Superior tonight and early 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. As the high weakens to 30.2 inches while moving to the
Lower Great Lakes by Monday evening, a 29.6 inch low pressure
trough will move out over the Northern Plains. A 29.5 inch low
will then develop along this trough and move to far northern
Ontario by Tuesday evening. The trough will sweep across Lake
Superior late Tuesday afternoon and night. 29.9 inch high pressure
begins to build in the MS River Valley Wednesday.

LSZ162-290400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
351 PM EDT Fri Jun 28 2024 /251 PM CDT Fri Jun 28 2024/

.LATE THIS AFTERNOON...South winds 10 to 20 knots. Patchy fog.
Isolated showers. Waves 1 to 3 feet.
.TONIGHT...Northeast winds 5 to 15 knots becoming west 10 to
20 knots after midnight. Patchy fog. A slight chance of
thunderstorms and isolated showers. Waves subsiding to calm to
2 feet.
.SATURDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then veering north late. Patchy fog
through early afternoon. A slight chance of showers and
thunderstorms. Waves building to 1 to 3 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots. 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...Southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. A chance of showers by mid afternoon.
Waves calm to 2 feet.
.MONDAY NIGHT...South winds 15 to 25 knots. Showers and a chance
of thunderstorms. 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.
.WEDNESDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.

$$

LSZ263-290400-
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-
351 PM EDT Fri Jun 28 2024

.LATE THIS AFTERNOON...South winds 10 to 20 knots. Patchy fog.
Scattered showers. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.TONIGHT...Southwest winds 5 to 15 knots veering west after
midnight. Patchy fog. Scattered showers and a slight chance of
thunderstorms. Waves subsiding to calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then becoming north 10 to 20 knots
late. Patchy fog through early afternoon. A chance of showers and
a slight chance of thunderstorms. Waves building to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. A slight chance of rain showers
through 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 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. Showers and a chance
of thunderstorms. Waves building to 2 to 4 feet.
.TUESDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of showers. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots. Waves building to 2 to 4 feet, then subsiding to calm
to 2 feet.

$$

LSZ264-290400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
351 PM EDT Fri Jun 28 2024

.LATE THIS AFTERNOON...South winds 15 to 25 knots. Patchy fog.
Numerous showers. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...South winds 10 to 20 knots becoming west 5 to 15 knots
after midnight, then veering northwest late. Patchy fog through
midnight. Areas of dense fog after midnight. Scattered showers
and a slight chance of thunderstorms. Waves subsiding to 1 to
3 feet.
.SATURDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then veering north late. Patchy fog
through early afternoon. A slight chance of thunderstorms through
early afternoon. A slight chance of showers. Waves subsiding to
calm to 2 feet, then building to 3 to 6 feet occasionally to
8 feet.
.SATURDAY NIGHT...North winds 15 to 25 knots becoming northwest
5 to 15 knots after midnight. A slight chance of showers through
midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots backing southwest after
midnight. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. Waves building to 1 to 3 feet.
.MONDAY NIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of showers through midnight,
then showers likely after midnight. 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.
.WEDNESDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ265-290400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
351 PM EDT Fri Jun 28 2024

.LATE THIS AFTERNOON...South winds 15 to 25 knots. Patchy fog.
Numerous showers and a slight chance of thunderstorms. Waves 3 to
5 feet occasionally to 7 feet.
.TONIGHT...South winds 10 to 20 knots veering west late. Patchy
fog. Scattered showers and a slight chance of thunderstorms.
Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots becoming northwest 15 to
25 knots in the afternoon, then increasing to 20 to 30 knots
late. A slight chance of showers and thunderstorms through early
afternoon. Waves building to 3 to 6 feet occasionally to 8 feet.
.SATURDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
10 to 20 knots. A slight chance of showers through midnight.
Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 2 to 4 feet.
.SUNDAY...Northwest winds 10 to 20 knots. Waves subsiding to calm
to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots backing southwest after
midnight. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots becoming southeast 15 to
25 knots by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 15 to 25 knots. A chance of showers
through midnight, then showers after midnight. 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.
.WEDNESDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ266-290400-
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-
351 PM EDT Fri Jun 28 2024

.LATE THIS AFTERNOON...South winds 20 to 30 knots. Patchy fog.
Showers and a slight chance of thunderstorms. Waves 3 to 6 feet
occasionally to 8 feet building to 4 to 7 feet occasionally to
9 feet.
.TONIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then veering west late. Patchy fog.
Scattered showers and a slight chance of thunderstorms. Waves
subsiding to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots becoming northwest 15 to
25 knots in the afternoon, then increasing to 20 to 30 knots
late. Patchy dense fog through early afternoon. A slight chance
of showers and thunderstorms through early afternoon. Waves
subsiding to calm to 2 feet, then building to 4 to 7 feet
occasionally to 9 feet.
.SATURDAY NIGHT...North winds 20 to 30 knots diminishing to 15 to
25 knots after midnight, then backing northwest late. A slight
chance of showers through midnight. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 5 feet
occasionally to 7 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 backing southwest after
midnight. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. Waves building to 1 to 3 feet.
.MONDAY NIGHT...South winds 15 to 25 knots. Showers likely after
midnight. Waves building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...South winds 15 to 25 knots diminishing to 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.
.WEDNESDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ267-290400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
351 PM EDT Fri Jun 28 2024

.LATE THIS AFTERNOON...Southeast winds 20 to 30 knots. Patchy
fog. Showers. Waves 2 to 4 feet building to 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...South winds 20 to 30 knots diminishing to 15 to
25 knots after midnight, then becoming southwest 10 to 20 knots
late. Patchy fog. Showers through midnight. A chance of
thunderstorms. Scattered showers after midnight. Waves subsiding
to calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then becoming northwest 20 to 30 knots
late. Patchy fog through early afternoon. A chance of showers and
thunderstorms through early afternoon. Waves building to 4 to
7 feet occasionally to 9 feet.
.SATURDAY NIGHT...Northwest winds 20 to 30 knots veering north
after midnight, then diminishing to 15 to 25 knots late. A slight
chance of showers through midnight. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY...Northwest winds 10 to 20 knots backing west by mid
afternoon. Waves subsiding to 1 to 3 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots. Waves subsiding to calm
to 2 feet.
.MONDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of showers after midnight.
Waves building to 2 to 4 feet.
.TUESDAY...South winds 20 to 30 knots diminishing to 10 to
20 knots. Showers, then a chance of showers. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to calm to
2 feet.
.WEDNESDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ261-290400-
MAFOR 2821/
Superior West 12410 13610 12710 11720. A chance of showers
Saturday morning. Waves 1 to 3 feet.

Superior North Central 11336 11420 19426 11510 19516 11604 11714
12720 11730. Waves 3 to 6 feet subsiding to 1 to 4 feet tonight,
then building to 3 to 5 feet Saturday.

Superior South Central 11446 11430 19436 11420 11510 19516 11610
19616 11610 11720 11730. Waves 3 to 5 feet subsiding to 1 to 3
feet tonight, then building to 3 to 5 feet Saturday.

Superior East 11346 11436 11420 19426 11520 19526 11510 19516
11610 19614 11620 11720. Waves 3 to 6 feet subsiding to 1 to 4
feet tonight, then building to 3 to 5 feet Saturday.

$$

BW

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

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