302
FZUS63 KMQT 250744
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
344 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 29.4 inch low pressure near Lake Winnipeg will
continue to move an associated 29.6 inch trough across the lake
into the morning. In its wake, a 29.8 inch high pressure builds
northeast into the upper Great Lakes region into the afternoon.
The high then shifts toward the mouth of the St. Lawrence River on
Sunday as the next low pressure of around 29.4 inches lifts
northeast into southern Wisconsin. This low deepens to 29.3 inches
as it tracks 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 into the Upper Great Lakes.

LSZ162-251545-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
344 AM EDT Sat May 25 2024 /244 AM CDT Sat May 25 2024/

.EARLY THIS MORNING...Southwest winds 20 to 30 knots. Waves 3 to
6 feet occasionally to 8 feet.
.TODAY...Southwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. Scattered rain showers by mid
afternoon. Waves subsiding to 2 to 4 feet.
.TONIGHT...South winds 10 to 20 knots becoming southwest 5 to
15 knots after midnight. A chance of rain showers and a slight
chance of thunderstorms. 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. 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.

$$

LSZ263-251545-
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-
344 AM EDT Sat May 25 2024

.EARLY THIS MORNING...Southwest winds 15 to 25 knots. Waves 3 to
6 feet occasionally to 8 feet building to 4 to 7 feet
occasionally to 9 feet.
.TODAY...Southwest winds 15 to 25 knots becoming south 10 to
20 knots late. Scattered rain showers by mid afternoon. Waves
subsiding to 2 to 4 feet.
.TONIGHT...South winds 5 to 15 knots veering southwest after
midnight. A chance of rain showers and a slight chance of
thunderstorms. 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. 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.

$$

LSZ264-251545-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
344 AM EDT Sat May 25 2024

.EARLY THIS MORNING...Southwest winds 15 to 25 knots. Patchy fog.
Isolated rain showers. Waves 4 to 7 feet occasionally to 9 feet
subsiding to 3 to 6 feet occasionally to 8 feet, then building to
4 to 7 feet occasionally to 9 feet.
.TODAY...Southwest winds 15 to 25 knots becoming south 10 to
20 knots late. Waves subsiding to 2 to 4 feet.
.TONIGHT...South winds 5 to 15 knots. A chance of rain showers
and a slight chance of thunderstorms. 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.

$$

LSZ265-251545-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
344 AM EDT Sat May 25 2024

.EARLY THIS MORNING...West winds 10 to 20 knots. Patchy fog.
Isolated rain showers. Waves 3 to 5 feet occasionally to 7 feet
subsiding to 2 to 4 feet.
.TODAY...West winds 10 to 20 knots backing southwest in the
afternoon, then backing southeast late. Waves 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 chance of
rain showers and a slight chance of thunderstorms. 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.

$$

LSZ266-251545-
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-
344 AM EDT Sat May 25 2024

.EARLY THIS MORNING...South winds 15 to 25 knots. Patchy fog.
Scattered rain showers and isolated thunderstorms. Waves 4 to
7 feet occasionally to 9 feet subsiding to 3 to 6 feet
occasionally to 8 feet.
.TODAY...West winds 10 to 20 knots backing south in the
afternoon, then backing southeast late. Waves 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 slight chance
of showers. A slight chance of thunderstorms after midnight.
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.

$$

LSZ267-251545-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
344 AM EDT Sat May 25 2024

.EARLY THIS MORNING...Southeast winds 15 to 25 knots. Numerous
rain showers and isolated thunderstorms. Waves 3 to 6 feet
occasionally to 8 feet.
.TODAY...South winds 10 to 20 knots veering northwest in the
afternoon, then veering east late. Patchy fog through early
afternoon. Scattered showers and isolated thunderstorms through
early afternoon. Waves 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 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.

$$

LSZ261-251545-
MAFOR 2509/
Superior West 14530 11520 19526 11416 11510 11500. Waves 3 to 6
feet subsiding to 2 to 4 feet today. Waves 2 to 4 feet subsiding
to 1 to 3 feet tonight.

Superior North Central 14530 11420 11310 12410. A chance of
showers overnight. Waves 4 to 7 feet subsiding to 3 to 6 feet
today. Waves 2 to 4 feet subsiding to 1 to 3 feet tonight.

Superior South Central 11510 19516 11620 11510 12310 11300 12400.
Waves 3 to 5 feet subsiding to 1 to 3 feet today. Waves 1 to 2
feet tonight.

Superior East 11436 11520 19529 11610 11400 12300 11310 11410.
Waves 5 to 7 feet subsiding to 1 to 3 feet today. Waves 1 to 2
feet tonight.

$$

07

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

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