672
FZUS63 KMQT 251346
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
946 AM EDT Sat May 25 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 29.5 inch low pressure near Lake Winnipeg gradually
weakens while slowly tracking north away from Lake Superior. In
its wake, a weak high pressure builds to 29.9 inches across the
Great Lakes region tonight. Ridging shifts east on Sunday as the
next low pressure at 29.5 inches lifts northeast into southern
Wisconsin. This low deepens to 29.3 inches as it tracks northeast
across northern lower Michigan Monday morning and then into
western Quebec by Tuesday morning. In its wake, a 30.2 inch high
pressure builds over the Northern Plains on Tuesday. This high
pressure continues building to 30.3 inches by Wednesday as it
shifts east over the Upper Great Lakes.

LSZ162-252200-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
946 AM EDT Sat May 25 2024 /846 AM CDT Sat May 25 2024/

.REST OF TODAY...Southwest winds 20 to 30 knots diminishing to
15 to 25 knots in the afternoon. A chance of showers by mid
afternoon. Waves 3 to 6 feet occasionally to 8 feet subsiding to
2 to 4 feet.
.TONIGHT...South winds 10 to 20 knots becoming southwest 5 to
15 knots after midnight. A slight chance of thunderstorms through
midnight. A chance of rain showers. Waves subsiding to calm to
2 feet.
.SUNDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. A chance of rain showers. Waves
building to 1 to 3 feet.
.SUNDAY NIGHT...Northeast winds 10 to 20 knots backing north
after midnight. A slight chance of rain showers. Waves subsiding
to calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. A slight chance of rain
showers. Waves building to 1 to 3 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots. Waves 1 to
3 feet.
.TUESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of showers. Waves subsiding to calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots backing east. Waves calm
to 2 feet.

$$

LSZ263-252200-
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-
946 AM EDT Sat May 25 2024

.REST OF TODAY...Southwest winds 15 to 25 knots diminishing to
10 to 20 knots late. A chance of showers by mid afternoon. Waves
3 to 6 feet occasionally to 8 feet subsiding to 1 to 3 feet.
.TONIGHT...South winds 5 to 15 knots veering southwest after
midnight. A slight chance of thunderstorms through midnight. A
chance of rain showers. Waves subsiding to calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots backing northeast in the
afternoon. A chance of rain showers. Waves building to 1 to
3 feet.
.SUNDAY NIGHT...Northeast winds 5 to 15 knots backing north after
midnight. A chance of rain showers. Waves 1 to 3 feet.
.MONDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. A slight chance of rain showers. Waves building to
2 to 4 feet.
.MONDAY NIGHT...Northwest winds 5 to 15 knots. Waves subsiding to
1 to 3 feet.
.TUESDAY...Northwest winds 5 to 15 knots. A chance of showers.
Waves subsiding to calm to 2 feet.
.WEDNESDAY...North winds 5 to 15 knots veering south. Waves calm
to 2 feet.

$$

LSZ264-252200-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
946 AM EDT Sat May 25 2024

.REST OF TODAY...Southwest winds 20 to 30 knots diminishing to
15 to 25 knots in the afternoon, then becoming south 10 to
20 knots late. A slight chance of showers by mid afternoon. Waves
4 to 7 feet occasionally to 9 feet subsiding to 2 to 4 feet.
.TONIGHT...South winds 5 to 15 knots. A chance of rain showers.
Waves subsiding to calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots backing east in the
afternoon. A slight chance of rain showers. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots backing north after
midnight. A chance of rain showers. Waves building to 1 to
3 feet.
.MONDAY...North winds 5 to 15 knots backing west by mid
afternoon. A chance of showers. Waves building to 2 to 4 feet.
.MONDAY NIGHT...Northwest winds 5 to 15 knots. Waves 2 to 4 feet.
.TUESDAY...Northwest winds 10 to 20 knots becoming north 5 to
15 knots. A chance of showers. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...West winds 5 to 15 knots. Waves subsiding to calm to
2 feet.

$$

LSZ265-252200-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
946 AM EDT Sat May 25 2024

.REST OF TODAY...West winds 10 to 20 knots backing southwest in
the afternoon, then backing southeast late. Waves 1 to 3 feet
subsiding to calm to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south after
midnight, then diminishing to 5 to 15 knots late. A slight chance
of thunderstorms through midnight. A chance of showers. Waves
calm to 2 feet.
.SUNDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots in the afternoon. A slight chance of showers by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northeast winds 10 to 20 knots backing north
after midnight. Showers likely. Waves building to 2 to 4 feet.
.MONDAY...Northwest winds 10 to 20 knots. A chance of showers.
Waves 2 to 4 feet.
.MONDAY NIGHT...West winds 10 to 20 knots veering northwest after
midnight. A chance of showers. Waves subsiding to 1 to 3 feet.
.TUESDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of showers. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ266-252200-
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-
946 AM EDT Sat May 25 2024

.REST OF TODAY...West winds 10 to 20 knots backing southwest in
the afternoon, then backing southeast late. Waves 3 to 6 feet
occasionally to 8 feet subsiding to 2 to 4 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south after
midnight, then diminishing to 5 to 15 knots late. A chance of
showers. Waves subsiding to calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon, then backing east late. A slight
chance of showers by mid afternoon. Waves building to 1 to
3 feet.
.SUNDAY NIGHT...Northeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. Showers likely and a slight chance
of thunderstorms. Waves building to 2 to 4 feet.
.MONDAY...North winds 15 to 25 knots backing northwest by mid
afternoon. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY NIGHT...Northwest winds 15 to 25 knots. A chance of
showers. Waves building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...Northwest winds 15 to 25 knots. A chance of showers.
Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ267-252200-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
946 AM EDT Sat May 25 2024

.REST OF TODAY...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots in the afternoon, then veering east late. Waves
2 to 4 feet subsiding to calm to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south after
midnight. A slight chance of showers. Waves calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots backing east late. Waves
building to 1 to 3 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots becoming northeast
15 to 25 knots after midnight. A chance of showers through
midnight. A slight chance of thunderstorms. Showers likely after
midnight. Waves building to 2 to 4 feet.
.MONDAY...North winds 15 to 25 knots backing northwest by mid
afternoon. Showers likely and a slight chance of thunderstorms
through early afternoon, then a chance of showers by mid
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...Northwest winds 15 to 25 knots. A chance of
showers. Waves building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...Northwest winds 15 to 25 knots. A chance of showers.
Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ261-252200-
MAFOR 2515/
Superior West 13530 11416 11510 12500 11200. Waves 3 to 6 feet
subsiding to 2 to 4 feet this afternoon then to 1 to 3 feet
tonight. Waves 1 foot or less Sunday morning.

Superior North Central 11540 11530 11420 11310 12410 12400. A
chance of showers tonight. Waves 3 to 6 feet this afternoon.
Waves 2 to 4 feet subsiding to 1 to 3 feet tonight. Waves 1 to 2
feet Sunday morning.

Superior South Central 11510 12310 11300 14400. A chance of
showers this evening. Waves 1 to 3 feet this afternoon and
tonight. Waves 1 foot or less Sunday morning.

Superior East 11610 11400 11310 11300 11310 11410 12400. Waves 1
to 3 feet.

$$

EK

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

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