402
FZUS63 KMQT 310733
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
333 AM EDT Fri May 31 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 system will gradually drift
east across the Great Lakes Basin today. Low pressure averaging
29.6 inches will move from northern Manitoba into northern Quebec
over the weekend. A 29.5 inch low pressure will move from the
Upper Midwest into Ontario Sunday night and Monday, which will
push a cold front across Lake Superior. Weak ridging at 29.8
inches follows over the Upper Great Lakes Tuesday as a 29.2 inch
low develops over southern Manitoba. This system will pull a 29.5
inch trough through Lake Superior Tuesday night into Wednesday.

LSZ162-311545-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
333 AM EDT Fri May 31 2024 /233 AM CDT Fri May 31 2024/

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

$$

LSZ263-311545-
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-
333 AM EDT Fri May 31 2024

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

$$

LSZ264-311545-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
333 AM EDT Fri May 31 2024

.EARLY THIS MORNING...South winds 10 to 20 knots. Waves 1 to
3 feet.
.TODAY...South winds 10 to 20 knots veering southwest in the
afternoon. A slight chance of showers. Waves 1 to 3 feet.
.TONIGHT...Southwest winds 5 to 15 knots. A chance of rain
showers. A slight chance of thunderstorms after midnight. Waves
subsiding to calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots. Rain showers likely
through early afternoon, then a slight chance of rain showers by
mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.SUNDAY...Southwest winds 5 to 15 knots backing southeast by mid
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...South winds 15 to 25 knots becoming west 5 to 15 knots.
Showers and a chance of thunderstorms. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots veering southeast. A chance
of showers. Waves calm to 2 feet.

$$

LSZ265-311545-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
333 AM EDT Fri May 31 2024

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

$$

LSZ266-311545-
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-
333 AM EDT Fri May 31 2024

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

$$

LSZ267-311545-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
333 AM EDT Fri May 31 2024

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

$$

LSZ261-311545-
MAFOR 3109/
Superior West 11410 13520 11420 11410 11510 11500. A chance of
showers today and overnight. Waves 1 to 2 feet.

Superior North Central 12420 13520 12410 11510. A chance of
showers overnight. Waves 1 to 3 feet.

Superior South Central 13410 12310 11300 12400. A chance of
showers overnight. Waves 1 to 3 feet today. Waves 2 feet or less
tonight.

Superior East 11420 11410 12420 14410. Waves 1 to 3 feet.

$$

WFO MQT

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

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