577
FZUS63 KMQT 120143
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
943 PM EDT Tue Jun 11 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 29.4 inch low pressure system over northwest
Ontario this evening will move to near James Bay by Wednesday
evening, dragging a 29.7 inch trough over Lake Superior tonight
and another 29.5 inch trough Thursday morning. 30.1 inch ridging
moves into the High Plains late Thursday into Friday, becoming
centered over Lake Superior on Friday afternoon. High pressure
builds to 30.2 inches and moves over the central Great Lakes
Saturday. This high will continue shifting east toward New England
on Sunday as troughing sets up west of Lake Superior.

LSZ162-120945-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
943 PM EDT Tue Jun 11 2024 /843 PM CDT Tue Jun 11 2024/

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

$$

LSZ263-120945-
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-
943 PM EDT Tue Jun 11 2024

.REST OF TONIGHT...South winds 5 to 15 knots veering southwest
after midnight. A chance of rain showers and a slight chance of
thunderstorms by late evening. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing south late. A
slight chance of showers and thunderstorms by mid afternoon.
Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight, then increasing to 10 to 20 knots late. A chance
of showers and thunderstorms. Waves building to 2 to 4 feet.
.THURSDAY...West winds 10 to 20 knots. A slight chance of
thunderstorms through early afternoon. A slight chance of
showers. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots veering south by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots. Showers likely. Waves building to 1 to 3 feet.
.SUNDAY...South winds 10 to 20 knots becoming southwest 5 to
15 knots. A chance of showers and thunderstorms. Waves subsiding
to calm to 2 feet.

$$

LSZ264-120945-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
943 PM EDT Tue Jun 11 2024

.REST OF TONIGHT...South winds 10 to 20 knots becoming southwest
5 to 15 knots late. A chance of showers by late evening. Waves
1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming south 5 to
15 knots late. A slight chance of showers and thunderstorms by
mid afternoon. Waves subsiding to calm to 2 feet, then building
to 1 to 3 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. A chance of showers and
thunderstorms. Waves building to 1 to 3 feet.
.THURSDAY...West winds 10 to 20 knots veering northwest by mid
afternoon. A slight chance of thunderstorms through early
afternoon. A slight chance of showers. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots veering north after
midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots veering south by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots increasing to 15 to
25 knots. A chance of showers. Waves building to 2 to 4 feet.
.SUNDAY...South winds 15 to 25 knots becoming southwest 5 to
15 knots. A chance of showers. Waves subsiding to calm to 2 feet.

$$

LSZ265-120945-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
943 PM EDT Tue Jun 11 2024

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

$$

LSZ266-120945-
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-
943 PM EDT Tue Jun 11 2024

.REST OF TONIGHT...South winds 15 to 25 knots diminishing to
10 to 20 knots late. A slight chance of showers. Waves 1 to
3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming south 5 to
15 knots in the afternoon, then increasing to 10 to 20 knots
late. A slight chance of showers and thunderstorms by mid
afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots veering southwest
late. A chance of showers and thunderstorms. Waves building to
1 to 3 feet.
.THURSDAY...West winds 15 to 25 knots veering northwest by mid
afternoon. A slight chance of showers and thunderstorms through
early afternoon. Waves building to 3 to 6 feet occasionally to
8 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. A chance of showers. Waves building to 2 to 4 feet.
.SUNDAY...South winds 15 to 25 knots becoming southwest 10 to
20 knots. A chance of showers. Waves subsiding to calm to 2 feet.

$$

LSZ267-120945-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
943 PM EDT Tue Jun 11 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.
A chance of showers. Waves calm to 2 feet building to 1 to
3 feet.
.WEDNESDAY...South winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then becoming southeast 10 to 20 knots
late. A slight chance of showers by mid afternoon. Waves
subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots. A chance of
showers and thunderstorms. Waves building to 1 to 3 feet.
.THURSDAY...Southwest winds 10 to 20 knots becoming west 15 to
25 knots by mid afternoon. A chance of showers and thunderstorms.
Waves building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding
to 1 to 3 feet.
.FRIDAY...Northwest winds 10 to 20 knots. Waves subsiding to calm
to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots backing south after
midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.
.SUNDAY...South winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of showers. Waves building to 2 to 4 feet,
then subsiding to calm to 2 feet.

$$
LSZ261-120945-
MAFOR 1203/
Superior West 14510 11510 12410 11510. A chance of showers and
thunderstorms Wednesday evening. Waves 1 to 3 feet.

Superior North Central 11420 11520 11510 13520 11420 11410. A
chance of showers overnight. A chance of showers and
thunderstorms Wednesday afternoon and Wednesday evening. Waves 1
to 3 feet.

Superior South Central 12420 12510 12400 11310 11410. A chance of
showers and thunderstorms Wednesday evening. Waves 1 to 3 feet
overnight, Wednesday, and Wednesday evening.

Superior East 13420 11510 11500 11400 11310 11410. A chance of
showers and thunderstorms Wednesday evening. Waves 1 to 3 feet.

$$

BW

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

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