013
FZUS63 KMQT 280801
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 AM EDT Sat Mar 28 2026

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 30.7 inch high over the Mid-Mississippi Valley this morning moves
into the Ohio River Valley today, eventually weakening to 30.5
inches by this evening as it continues eastward; the high eventually
moves offshore into the Atlantic by Sunday. Upstream on Sunday, a
29.6 inch low organizes over the Central Plains, lifting a 30.0 inch
trough over Lake Superior by Sunday night. This trough lingers over
the Great Lakes and slowly deepens with time early this week, before
the low pushes through at 29.5 inches on Tuesday. As the low lifts
into Canada late Tuesday, 30.3 inch high pressure builds over the
Northern Plains, gradually building pressure over the Upper Great
Lakes by Wednesday as the high presses east through Ontario at
around 30.5 inches.


LSZ162-282000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 AM EDT Sat Mar 28 2026 /301 AM CDT Sat Mar 28 2026/

.EARLY THIS MORNING...West winds 10 to 20 knots. Waves 1 to
3 feet.
.TODAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. A slight chance of snow showers. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.
.TONIGHT...East winds 5 to 15 knots backing northeast after
midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...Northeast winds 10 to 20 knots diminishing to 5 to
15 knots late. Waves calm to 2 feet.
.SUNDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.MONDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of snow showers by mid
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...Northeast winds 15 to 25 knots. A chance of snow
showers through midnight. A chance of rain showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...North winds 15 to 25 knots increasing to 20 to
30 knots. A chance of rain showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY...East winds 10 to 20 knots. Waves subsiding to calm
to 2 feet, then building to 2 to 4 feet.

$$

LSZ263-282000-
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-
401 AM EDT Sat Mar 28 2026

.EARLY THIS MORNING...West winds 15 to 25 knots. Waves 3 to
6 feet occasionally to 8 feet.
.TODAY...West winds 10 to 20 knots backing south late. A slight
chance of snow showers by mid afternoon. Waves subsiding to 1 to
3 feet.
.TONIGHT...South winds 5 to 15 knots backing northeast after
midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots veering east in the
afternoon, then backing northeast late. Waves calm to 2 feet.
.SUNDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.MONDAY...Northeast winds 5 to 15 knots becoming east 15 to
25 knots by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY NIGHT...East winds 15 to 25 knots. A chance of rain
showers, possibly mixed with snow. Waves building to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY...North winds 20 to 30 knots. A chance of rain showers.
Freezing spray. Waves building to 5 to 9 feet occasionally to
11 feet.
.WEDNESDAY...North winds 15 to 25 knots becoming southeast 10 to
20 knots. Waves subsiding to calm to 2 feet, then building to
2 to 4 feet.

$$

LSZ264-282000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 AM EDT Sat Mar 28 2026

.EARLY THIS MORNING...Northwest winds 15 to 25 knots. Freezing
spray. Waves 4 to 7 feet occasionally to 9 feet subsiding to 3 to
6 feet occasionally to 8 feet.
.TODAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots in the afternoon, then backing south late. A slight
chance of snow showers by mid afternoon. Waves subsiding to 1 to
3 feet.
.TONIGHT...South winds 5 to 15 knots backing northeast after
midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots veering east in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots backing northeast after
midnight. Waves calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Waves building to 1 to 3 feet.
.MONDAY NIGHT...East winds 15 to 25 knots. A chance of rain and
snow showers. Waves building to 4 to 7 feet occasionally to
9 feet.
.TUESDAY...Northeast winds 20 to 30 knots becoming north gales to
35 knots. A chance of rain showers. Freezing spray. Waves
building to 6 to 10 feet occasionally to 13 feet.
.WEDNESDAY...North winds 20 to 30 knots becoming southeast 15 to
25 knots. Freezing spray. Waves subsiding to calm to 2 feet, then
building to 2 to 4 feet.

$$

LSZ265-282000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 AM EDT Sat Mar 28 2026

.EARLY THIS MORNING...Northwest winds 20 to 30 knots. Waves 3 to
6 feet occasionally to 8 feet.
.TODAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots in the afternoon, then becoming south 15 to 25 knots
late. A chance of snow showers by mid afternoon. Waves subsiding
to calm to 2 feet.
.TONIGHT...South winds 10 to 20 knots becoming north 5 to
15 knots late. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots backing north
after midnight. Waves calm to 2 feet.
.MONDAY...Northeast winds 10 to 20 knots veering east by mid
afternoon. Waves building to 1 to 3 feet.
.MONDAY NIGHT...East winds 20 to 30 knots. Rain showers, possibly
mixed with snow through midnight, then a chance of rain showers
after midnight. Waves building to 4 to 7 feet occasionally to
9 feet.
.TUESDAY...North gales to 35 knots. A chance of rain showers.
Freezing spray. Waves building to 10 to 14 feet occasionally to
18 feet, then subsiding to 9 to 12 feet occasionally to 15 feet.
.WEDNESDAY...North winds 20 to 30 knots becoming southeast 15 to
25 knots. Freezing spray. Waves subsiding to calm to 2 feet, then
building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ266-282000-
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-
401 AM EDT Sat Mar 28 2026

.EARLY THIS MORNING...Northwest winds 15 to 25 knots. Freezing
spray. A slight chance of snow showers. Waves 6 to 9 feet
occasionally to 11 feet.
.TODAY...West winds 15 to 25 knots backing south late. Freezing
spray through early afternoon. A chance of snow showers by mid
afternoon. Waves subsiding to 2 to 4 feet.
.TONIGHT...South winds 10 to 20 knots veering southwest late.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots backing north
after midnight. Waves calm to 2 feet.
.MONDAY...Northeast winds 10 to 20 knots veering east by mid
afternoon. Waves building to 1 to 3 feet.
.MONDAY NIGHT...East winds 20 to 30 knots. Rain showers, possibly
mixed with snow through midnight, then a chance of rain showers
after midnight. Waves building to 4 to 7 feet occasionally to
9 feet.
.TUESDAY...North gales to 35 knots. A chance of rain showers.
Freezing spray. Waves building to 10 to 14 feet occasionally to
18 feet.
.WEDNESDAY...North winds 20 to 30 knots becoming east 15 to
25 knots. Freezing spray. Waves subsiding to 1 to 3 feet, then
building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ267-282000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 AM EDT Sat Mar 28 2026

.EARLY THIS MORNING...Northwest winds 20 to 30 knots. Freezing
spray. A chance of snow showers. Waves 6 to 9 feet occasionally
to 11 feet.
.TODAY...West winds 20 to 30 knots diminishing to 15 to 25 knots
in the afternoon, then backing southwest late. Freezing spray
through early afternoon. A chance of snow showers. Waves
subsiding to 2 to 4 feet.
.TONIGHT...South winds 15 to 25 knots becoming southwest 10 to
20 knots after midnight. A slight chance of snow showers through
midnight. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet.
.SUNDAY...Southeast winds 10 to 20 knots becoming east 5 to
15 knots in the afternoon, then veering southeast late. Waves
calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots becoming north
5 to 15 knots after midnight. Waves calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 15 to 25 knots increasing to 20 to
30 knots after midnight. Rain showers likely. Waves building to
3 to 5 feet occasionally to 7 feet.
.TUESDAY...North gales to 35 knots. A chance of rain showers.
Freezing spray. Waves building to 8 to 12 feet occasionally to
15 feet.
.WEDNESDAY...North winds 20 to 30 knots becoming east 10 to
20 knots. Freezing spray. Waves subsiding to 1 to 3 feet, then
building to 2 to 4 feet.

$$

LSZ261-281400-
MAFOR 2809/
Superior West 12620 11520 12420 11300 11200 11110. Waves 2 to 4
feet subsiding to 1 to 3 feet today. Waves 1 to 3 feet tonight.

Superior North Central 11740 11630 11620 11520 11420 11410 11400
11100. Waves 4 to 7 feet subsiding to 2 to 4 feet today. Waves 1
to 3 feet tonight.

Superior South Central 11740 11630 11620 11420 12430 11420 11410.
A chance of snow showers this afternoon and evening. Waves 5 to 8
feet subsiding to 1 to 3 feet today. Waves 2 to 4 feet subsiding
to 1 to 3 feet tonight.

Superior East 11741 12631 11530 11527 11530 12520. Waves 5 to 9
feet subsiding to 4 to 6 feet today. Waves 2 to 4 feet tonight.

$$

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