024
FZUS63 KMQT 010739
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
339 AM EDT Sat Jun 1 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 pressure ridge extending from the Lower
Great Lakes to the Carolinas will drift east today. Meanwhile, a
29.9 inch low pressure trough over Manitoba and the eastern Dakotas
will shift east, dissipating while moving over Lake Superior
tonight. On Sunday, weak 30.0 inch high pressure ridging will
develop across the western Great Lakes. As the ridge shifts to
Quebec and the Lower Great Lakes during Sunday night, a 29.6 inch
trough will sweep across the Northern Plains to Minnesota. On
Monday, this trough will dissipate before reaching Lake Superior,
leaving Lake Superior between 30.0 inch ridging over Quebec into
New England and a new trough of 29.4 inches emerging over the
western Dakotas. On Tuesday, 29.2 inch low pressure tracking
across the Canadian Prairies will power the trough eastward to the
Upper Mississippi Valley. The trough will then sail across Lake
Superior Tuesday night and Wednesday morning while the parent low
pressure tracks from the Canadian Prairies to northern Ontario.

LSZ162-011545-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
339 AM EDT Sat Jun 1 2024 /239 AM CDT Sat Jun 1 2024/

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

$$

LSZ263-011545-
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-
339 AM EDT Sat Jun 1 2024

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. Showers
likely. Waves calm to 2 feet.
.TODAY...South winds 5 to 15 knots veering southwest late. A
chance of showers. Waves calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots becoming west less than
10 knots late. Waves calm to 2 feet.
.SUNDAY...Southwest winds less than 10 knots becoming east 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots becoming southeast 10 to
20 knots after midnight. A chance of rain showers. A slight
chance of thunderstorms after midnight. Waves building to 1 to
3 feet.
.MONDAY...Southeast winds 10 to 20 knots. Showers through early
afternoon, then a chance of showers. Waves building to 2 to 4
feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots veering south. A chance of
thunderstorms. Showers likely. Waves building to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots veering west. A
chance of showers. Waves building to 2 to 4 feet, then subsiding
to 1 to 3 feet.

$$

LSZ264-011545-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
339 AM EDT Sat Jun 1 2024

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. Showers
likely. Waves calm to 2 feet.
.TODAY...South winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots becoming west less than
10 knots late. Waves calm to 2 feet.
.SUNDAY...Southwest winds less than 10 knots becoming southeast
5 to 15 knots in the afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A slight chance of rain showers after
midnight. Waves building to 1 to 3 feet.
.MONDAY...Southeast winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots. Showers likely. Waves
building to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots. A chance of showers. Waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet.

$$

LSZ265-011545-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
339 AM EDT Sat Jun 1 2024

.EARLY THIS MORNING...South winds 5 to 15 knots. A slight chance
of showers. Waves calm to 2 feet.
.TODAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then veering south late. A chance of
showers. A slight chance of thunderstorms by mid afternoon. Waves
calm to 2 feet.
.TONIGHT...South winds 10 to 20 knots becoming southwest 5 to
15 knots after midnight, then veering west late. Waves calm to
2 feet.
.SUNDAY...Southwest winds 5 to 15 knots backing east in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast 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.
.MONDAY...Southeast winds 15 to 25 knots. Showers. Waves building
to 1 to 3 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. A chance of showers through
midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.

$$

LSZ266-011545-
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-
339 AM EDT Sat Jun 1 2024

.EARLY THIS MORNING...South winds 5 to 15 knots. A chance of
showers. Waves calm to 2 feet.
.TODAY...South winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. A chance of showers. A slight chance of
thunderstorms by mid afternoon. Waves calm to 2 feet.
.TONIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then veering southwest late. A chance of
rain showers and a slight chance of thunderstorms through
midnight. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots backing east in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves building to 1 to 3 feet.
.MONDAY...Southeast winds 15 to 25 knots. A chance of showers
through early afternoon, then showers likely by mid afternoon.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. A chance of showers. Waves
subsiding to calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots veering west. A
chance of showers. Waves 1 to 3 feet.

$$

LSZ267-011545-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
339 AM EDT Sat Jun 1 2024

.EARLY THIS MORNING...South winds 10 to 20 knots. Waves calm to
2 feet.
.TODAY...South winds 10 to 20 knots. A slight chance of showers
by mid afternoon. Waves calm to 2 feet.
.TONIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots late. A chance of showers through midnight. Waves calm
to 2 feet.
.SUNDAY...South winds 5 to 15 knots backing north in the
afternoon, then veering northeast late. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.MONDAY...Southeast winds 10 to 20 knots. A chance of showers.
Waves building to 1 to 3 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots. Showers likely
through midnight, then a chance of showers after midnight. Waves
subsiding to calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.
.WEDNESDAY...South winds 10 to 20 knots. Showers likely. A chance
of thunderstorms. A chance of showers. Waves calm to 2 feet.

$$

LSZ261-011545-
MAFOR 0109/
Superior West 11506 12400 11510 11410 11400 11500 11600. Waves 1
foot or less.

Superior North Central 11506 11406 11300 12410 11510 12500. Waves
2 feet or less.

Superior South Central 12400 11300 11410 11406 12400 11500. Waves
2 feet or less.

Superior East 14410 11410 13510. A chance of showers this
evening. Waves 1 to 2 feet.

$$

Rolfson

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

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