538
FZUS63 KMQT 111959
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
359 PM EDT Sat May 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...Tonight, Lake Superior will be under weak surface
ridging of 29.8 inches relative to a 29.7 inch low pressure over
southern Ontario and a 29.4 inch low over far northwestern
Ontario. As the southern low dissipates Sunday, the northwestern
low will weaken slightly as it moves north of Lake Superior at
29.5 inches. The low will slowly shift east, weakening to 29.6
inches over James Bay Monday morning. Tuesday into Wednesday, high
pressure of 30.1 inches slowly builds over northern Ontario as
lows of 29.7 inches move over the Dakotas and Virginias
respectively. By late Thursday, the low over the Daktoas will
approach the Upper Great Lakes, maintaining pressure at 29.7
inches.

LSZ162-120400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
359 PM EDT Sat May 11 2024 /259 PM CDT Sat May 11 2024/

.LATE THIS AFTERNOON...South winds 5 to 15 knots. A chance of
rain showers. Waves calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots
late. A chance of rain showers. A slight chance of thunderstorms
after midnight. Waves building to 1 to 3 feet.
.SUNDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then veering west late. A slight
chance of rain showers through early afternoon. Waves subsiding
to calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then veering north late. Waves calm to
2 feet.
.MONDAY...North winds 10 to 20 knots veering south by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Northeast winds 10 to 20 knots. Waves calm to
2 feet.
.TUESDAY...Northeast winds 10 to 20 knots veering east by mid
afternoon. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...Northeast winds 10 to 20 knots. Waves subsiding
to calm to 2 feet.
.WEDNESDAY...East winds 10 to 20 knots backing northeast. Rain
showers likely. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots backing northeast. A
chance of rain showers. Waves calm to 2 feet.

$$

LSZ263-120400-
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-
359 PM EDT Sat May 11 2024

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots
after midnight. A chance of rain showers. A slight chance of
thunderstorms after midnight. Waves building to 2 to 4 feet.
.SUNDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. A slight chance of showers and
thunderstorms through early afternoon. Waves subsiding to calm to
2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots veering north after
midnight, then increasing to 10 to 20 knots late. Waves calm to
2 feet.
.MONDAY...North winds 10 to 20 knots becoming southwest 5 to
15 knots by mid afternoon. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots becoming northeast 10 to
20 knots after midnight. Waves building to 1 to 3 feet.
.TUESDAY...Northeast winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...Northeast winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots. A chance of rain showers.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots. A chance of rain showers.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ264-120400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
359 PM EDT Sat May 11 2024

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots backing south after
midnight, then increasing to 10 to 20 knots late. A chance of
rain showers. A slight chance of thunderstorms after midnight.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots becoming southwest 5 to
15 knots in the afternoon. A slight chance of rain showers
through early afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots veering north after
midnight, then increasing to 10 to 20 knots late. Waves subsiding
to calm to 2 feet, then building to 1 to 3 feet.
.MONDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...North winds 10 to 20 knots. Waves building to
1 to 3 feet.
.TUESDAY...North winds 10 to 20 knots becoming west 5 to 15 knots
by mid afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots veering northeast
after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots veering southeast. A chance
of rain showers. Waves building to 1 to 3 feet.
.THURSDAY...Southeast winds 10 to 20 knots becoming south 5 to
15 knots. A chance of rain showers. Waves subsiding to calm to
2 feet.

$$

LSZ265-120400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
359 PM EDT Sat May 11 2024

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Southwest winds 5 to 15 knots backing south after
midnight, then increasing to 10 to 20 knots late. A chance of
rain showers after midnight. Waves building to 1 to 3 feet.
.SUNDAY...South winds 10 to 20 knots diminishing to 5 to 15 knots
late. A slight chance of showers and thunderstorms. Waves
building to 2 to 4 feet, then subsiding to calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots becoming northwest
10 to 20 knots after midnight. Waves calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots veering north by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Northwest winds 5 to 15 knots becoming north
10 to 20 knots after midnight. Waves calm to 2 feet.
.TUESDAY...North winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots becoming southeast 10 to
20 knots. A chance of rain showers. Waves calm to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots veering south. A
chance of rain showers. Waves calm to 2 feet.

$$

LSZ266-120400-
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-
359 PM EDT Sat May 11 2024

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...West winds 5 to 15 knots backing south after midnight,
then increasing to 10 to 20 knots late. A chance of rain showers
after midnight. Waves building to 2 to 4 feet.
.SUNDAY...South winds 15 to 25 knots diminishing to 5 to 15 knots
late. A chance of rain showers and a slight chance of
thunderstorms. Waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 1 to 3 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots becoming west 10 to
20 knots after midnight, then veering northwest late. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.MONDAY...Northwest winds 10 to 20 knots. Waves 1 to 3 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. Waves 1 to 3 feet.
.TUESDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Waves 1 to 3 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots veering northeast
after midnight. Waves subsiding to calm to 2 feet, then building
to 1 to 3 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots veering southeast.
Waves calm to 2 feet.
.THURSDAY...Southeast winds 15 to 25 knots becoming south 10 to
20 knots. A chance of rain showers. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.

$$

LSZ267-120400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
359 PM EDT Sat May 11 2024

.LATE THIS AFTERNOON...West winds 10 to 20 knots. Waves 1 to
3 feet.
.TONIGHT...West winds 5 to 15 knots backing south late. A slight
chance of rain showers after midnight. Waves subsiding to calm to
2 feet.
.SUNDAY...South winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon, then diminishing to 10 to 20 knots late. A
chance of rain showers. A slight chance of thunderstorms by mid
afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight, then becoming northwest 5 to 15 knots late. Waves
subsiding to calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots. Waves building to 1 to
3 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. Waves 1 to 3 feet.
.TUESDAY...North winds 10 to 20 knots becoming northwest 15 to
25 knots by mid afternoon. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots veering northeast
after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...North winds 10 to 20 knots veering southeast. Waves
calm to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.

$$

LSZ261-120400-
MAFOR 1121/
Superior West 13410 12420 13510. A chance of showers tonight.
Waves 1 to 4 feet.

Superior North Central 11620 11520 11510 12420 11430 11420 11510.
A chance of rain showers overnight and Sunday morning. Waves 1 to
4 feet.

Superior South Central 12600 11500 11410 11420 12430 11410. A
chance of rain showers overnight and Sunday morning. Waves 2 feet
or less tonight. Waves 1 to 4 feet Sunday.

Superior East 12710 11600 11400 11410 12430 11420. A chance of
rain showers Sunday. Waves 1 to 3 feet tonight building to 3 to 5
feet Sunday.

$$

GS

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

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