559
FZUS63 KMQT 131342
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
942 AM EDT Thu Jun 13 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 29.6 inch trough over Lake Superior this morning
gives way to ridging the rest of today through Friday, with the
ridging building to 30.1 inches over the lake by Friday
afternoon. This high pressure continues building to 30.2 inches
as it moves over the central Great Lakes Saturday, and continues
shifting east toward New England on Sunday. Deepening low pressure
near 29.4 inches emerges out of the High Plains Saturday night,
moving northeast towards Hudson Bay Sunday into Monday as it
deepens to 29.0 inches. This low extends a 29.6 inch trough over
Lake Superior Sunday night before weak ridging of 29.9 inches
moves over Lake Superior from the Northern Plains Monday. A low
pressure of at least 29.5 inches looks to move off the Colorado
Rockies into the Northern Plains early next week.

LSZ162-132145-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
942 AM EDT Thu Jun 13 2024 /842 AM CDT Thu Jun 13 2024/

.REST OF TODAY...West winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. A slight chance of showers and
thunderstorms. Waves 1 to 3 feet subsiding to calm to 2 feet.
.TONIGHT...West winds 10 to 20 knots becoming northwest 5 to
15 knots after midnight, then veering north late. Waves calm to
2 feet.
.FRIDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 10 to 20 knots. A chance of showers
through midnight, then showers likely after midnight. Waves
building to 1 to 3 feet.
.SUNDAY...East winds 10 to 20 knots veering west. A chance of
showers. Waves subsiding to calm to 2 feet.
.MONDAY...West winds 10 to 20 knots veering northeast. A chance
of showers. Waves calm to 2 feet.

$$

LSZ263-132145-
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-
942 AM EDT Thu Jun 13 2024

.REST OF TODAY...West winds 10 to 20 knots. Patchy fog by late
morning. A chance of showers and a slight chance of
thunderstorms. Waves 1 to 3 feet.
.TONIGHT...West winds 5 to 15 knots veering north late. Waves
subsiding to calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots veering east in the
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots veering southeast after
midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. A chance of showers through
midnight, then showers likely after midnight. Waves building to
1 to 3 feet.
.SUNDAY...Southeast winds 10 to 20 knots becoming southwest 5 to
15 knots. A chance of showers. Waves subsiding to calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing east. A chance of
showers. Waves calm to 2 feet.

$$

LSZ264-132145-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
942 AM EDT Thu Jun 13 2024

.REST OF TODAY...West winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. Patchy fog. A slight chance of showers and thunderstorms.
Waves calm to 2 feet building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering north late. Waves
calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots veering south late. Waves
calm to 2 feet.
.FRIDAY NIGHT...South winds less than 10 knots increasing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots. A chance of
showers. Waves building to 2 to 4 feet.
.SUNDAY...Southeast winds 10 to 20 knots becoming southwest 5 to
15 knots. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing east. A chance of
showers. Waves calm to 2 feet.

$$

LSZ265-132145-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
942 AM EDT Thu Jun 13 2024

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

$$

LSZ266-132145-
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-
942 AM EDT Thu Jun 13 2024

.REST OF TODAY...West winds 10 to 20 knots veering northwest in
the afternoon. Patchy fog. A slight chance of showers and
thunderstorms. Waves calm to 2 feet building to 1 to 3 feet.
.TONIGHT...Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots becoming northwest 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. Waves calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots backing south after
midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots backing southeast
after midnight. A chance of showers. Waves building to 2 to
4 feet.
.SUNDAY...Southeast winds 15 to 25 knots becoming south 10 to
20 knots. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to calm to 2 feet.
.MONDAY...Southwest winds 10 to 20 knots backing south. A chance
of showers. Waves calm to 2 feet.

$$

LSZ267-132145-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
942 AM EDT Thu Jun 13 2024

.REST OF TODAY...Southwest winds 10 to 20 knots veering west in
the afternoon. A slight chance of showers and thunderstorms.
Patchy fog by mid afternoon. Waves calm to 2 feet building to
1 to 3 feet.
.TONIGHT...West winds 10 to 20 knots veering northwest after
midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...Northwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots backing southeast
after midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. A chance of showers after
midnight. Waves building to 1 to 3 feet.
.SUNDAY...Southeast winds 15 to 25 knots becoming south 10 to
20 knots. Showers likely. A chance of showers. Waves building to
2 to 4 feet, then subsiding to calm to 2 feet.
.MONDAY...South winds 10 to 20 knots. A chance of showers. Waves
calm to 2 feet.

$$
LSZ261-132145-
MAFOR 1315/
Superior West 12620 12610 11600 11700 11800 11100. Waves 1 to 3
feet this afternoon and tonight. Waves 1 foot or less Friday
morning.

Superior North Central 11710 11620 13610 11710 12810. Waves 1 to
3 feet.

Superior South Central 11620 12720 11710 11600 13700. Waves 1 to
3 feet this afternoon and tonight. Waves 1 foot or less Friday
morning.

Superior East 12610 14710 11710 11700. Waves 2 to 3 feet.

$$

TAP

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

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