921
FZUS63 KMQT 270157
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
957 PM EDT Fri Jul 26 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 30.2 inch high centered over southern Lake Huron
tonight gradually weakens and shifts eastward overnight. Expect
29.5 inch troughing to develop over the northern Plains Saturday.
This trough will gradually fill to 29.7 inches as it sweeps
eastward over Lake Superior Monday into early Tuesday. Weak high
pressure follows Wednesday at 29.8 inches.

LSZ162-271000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
957 PM EDT Fri Jul 26 2024 /857 PM CDT Fri Jul 26 2024/

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

$$

LSZ263-271000-
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-
957 PM EDT Fri Jul 26 2024

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

$$

LSZ264-271000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
957 PM EDT Fri Jul 26 2024

.REST OF TONIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves 2 to 4 feet building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.
.SATURDAY...South winds 10 to 20 knots diminishing to 5 to
15 knots late. Waves subsiding to 1 to 3 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then veering southwest late. Waves
building to 2 to 4 feet.
.SUNDAY...Southwest winds 10 to 20 knots backing south by mid
afternoon. Waves subsiding to 1 to 3 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.MONDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. A chance of showers. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots veering west after
midnight. A chance of showers and thunderstorms. Waves calm to
2 feet.
.TUESDAY...West winds 5 to 15 knots backing southwest. Waves calm
to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ265-271000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
957 PM EDT Fri Jul 26 2024

.REST OF TONIGHT...South winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves 2 to 4 feet subsiding to
calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots. Waves building to 1 to
3 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots. Waves building to
2 to 4 feet, then subsiding to calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots. Waves calm to 2 feet.
.MONDAY...South winds 10 to 20 knots backing southeast by mid
afternoon. A chance of showers and thunderstorms. Waves calm to
2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots becoming west 5 to
15 knots after midnight. A chance of showers and thunderstorms.
Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots backing southwest. Waves calm
to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing south. Waves
calm to 2 feet.

$$

LSZ266-271000-
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-
957 PM EDT Fri Jul 26 2024

.REST OF TONIGHT...South winds 15 to 25 knots diminishing to
10 to 20 knots late. Waves 3 to 6 feet occasionally to 8 feet,
then subsiding to 2 to 4 feet.
.SATURDAY...South winds 10 to 20 knots increasing to 15 to
25 knots late. Waves subsiding to 1 to 3 feet, then building to
2 to 4 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots. Waves building to
3 to 6 feet occasionally to 8 feet, then subsiding to 2 to
4 feet.
.SUNDAY...South winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. Waves subsiding to 1 to 3 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots. Waves building to
2 to 4 feet, then subsiding to 1 to 3 feet.
.MONDAY...South winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots becoming west 5 to
15 knots after midnight. A chance of showers and thunderstorms.
Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots backing southwest. Waves calm
to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ267-271000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
957 PM EDT Fri Jul 26 2024

.REST OF TONIGHT...South winds 10 to 20 knots. Waves calm to
2 feet building to 1 to 3 feet.
.SATURDAY...South winds 10 to 20 knots. Waves subsiding to calm
to 2 feet, then building to 1 to 3 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots. Waves building to
2 to 4 feet.
.SUNDAY...South winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.
.MONDAY...South winds 10 to 20 knots. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. A chance of showers
and thunderstorms. Waves calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of showers. Waves calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots. Waves calm to 2 feet.

$$
LSZ261-271000-
MAFOR 2703/
Superior West 12420 11520 12420 11410 12420. Waves 1 to 4 feet.

Superior North Central 15420 11410 11420. Waves 1 to 4 feet.

Superior South Central 11420 14410 13420. Waves 1 to 4 feet
building to 3 to 5 feet Saturday evening.

Superior East 14420 11420 11410 11420 11430. Waves 2 to 5 feet.

$$

JSS

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

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