880
FZUS63 KMQT 140734
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
334 AM EDT Tue May 14 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 over western Hudson Bay is
extending a 30.0 inch ridge over Lake Superior this morning, and
this remains in place until Wednesday night. Meanwhile, a 29.7
inch trough emerging over the Northern Plains on Tuesday weakens
to 29.8 inches as it shifts to the Upper Mississippi Valley during
Wednesday night and Thursday. The trough deepens to 29.7 inches
over Lake Superior Thursday night and remains through Friday. As
the trough arrives in James Bay midday Saturday, weak ridging of
29.8 inches will be over the lake as another low pressure transits
through the Northern Plains and into Ontario Saturday evening.



LSZ162-141545-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
334 AM EDT Tue May 14 2024 /234 AM CDT Tue May 14 2024/

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northeast winds 10 to 20 knots veering east in the
afternoon, then backing northeast late. Waves building to 1 to
3 feet.
.TONIGHT...Northeast winds 5 to 15 knots. Waves subsiding to calm
to 2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots increasing to 15 to
25 knots. Waves building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY NIGHT...Northeast winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. A chance of rain showers. Waves
subsiding to 1 to 3 feet.
.THURSDAY...East winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Rain showers likely through early
afternoon, then a chance of rain showers by mid afternoon. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots. A chance of rain
showers. Waves subsiding to calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots. A chance of rain showers. Waves calm to 2 feet.
.SATURDAY...Northeast winds 10 to 20 knots backing west. A chance
of showers. Waves calm to 2 feet.

$$

LSZ263-141545-
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-
334 AM EDT Tue May 14 2024

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots veering east after
midnight, then diminishing to less than 10 knots late. Waves calm
to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots in the afternoon. Waves building to 1 to 3 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A slight chance of rain showers after
midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots. A chance of rain showers.
Waves building to 1 to 3 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots veering south after
midnight. A chance of rain showers. Waves subsiding to calm to
2 feet.
.FRIDAY...East winds 5 to 15 knots. A chance of rain showers.
Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots becoming southwest
10 to 20 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ264-141545-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
334 AM EDT Tue May 14 2024

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...North winds 5 to 15 knots backing west late. Waves calm
to 2 feet.
.TONIGHT...Northwest winds less than 10 knots veering north after
midnight, then veering east late. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...East winds 5 to 15 knots. A chance of rain showers.
Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. A chance of rain showers. Waves calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots backing southeast. A chance
of rain showers. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ265-141545-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
334 AM EDT Tue May 14 2024

.EARLY THIS MORNING...North winds 10 to 20 knots. Waves calm to
2 feet.
.TODAY...North winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon. Waves calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots veering southeast
after midnight. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A chance of rain showers. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. A chance of showers. Waves calm to
2 feet.
.FRIDAY...East winds 5 to 15 knots becoming south 10 to 20 knots.
A chance of showers. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots veering southwest. A
chance of showers. Waves calm to 2 feet.

$$

LSZ266-141545-
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-
334 AM EDT Tue May 14 2024

.EARLY THIS MORNING...North winds 10 to 20 knots. Waves 1 to
3 feet.
.TODAY...North winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon, then backing northwest late. Waves subsiding to
calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots veering northeast late.
Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots backing north late. Waves
calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots veering east
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. A chance of rain showers. Waves
calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots. A chance of rain showers. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots veering south. A
chance of rain showers. Waves calm to 2 feet.

$$

LSZ267-141545-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
334 AM EDT Tue May 14 2024

.EARLY THIS MORNING...North winds 10 to 20 knots. Waves 1 to
3 feet.
.TODAY...North winds 10 to 20 knots backing northwest late. Waves
subsiding to calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots veering northeast after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots backing north in the
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots veering southeast
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots backing east by mid
afternoon. Waves building to 1 to 3 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots. A chance of
showers. Waves subsiding to calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots veering south. A chance
of showers. Waves calm to 2 feet.
.SATURDAY...East winds 10 to 20 knots veering south. A chance of
showers. Waves calm to 2 feet.

$$

LSZ261-141545-
MAFOR 1409/
Superior West 12100 12210 11110 13100. Waves 1 foot or less.

Superior North Central 11810 12800 11700 11600 12700 11100. Waves
2 feet or less.

Superior South Central 11800 11810 15800. Waves 1 to 3 feet
today. Waves 1 foot or less tonight.

Superior East 12810 11800 13710 11810 11110. Waves 1 to 3 feet.

$$

LC

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

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