545
FZUS63 KMQT 282001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EDT Sun Jun 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 29.4 low will track north, and then northwest, from the central
Plains to southern Saskatchewan through Monday night, deepening to
29.2 inches. Meanwhile a 30.1 inch high over the Hudson Bay will
weaken and shift southeast to the east of Lake Erie as the
Saskatchewan low regresses southwest at 29.5 inches to Montana while
another low at 29.4 inches moves from Colorado to the Northern
Plains. The 2nd low moves to southern Manitoba tomorrow night as
high pressure shifts off the East Coast, still at 30.1 inches.
Tuesday, the low shifts north to Lake Winnipeg and deepens to 29.2
inches. The low then weakens to 29.4 inches as it crosses northern
Ontario by midday Wednesday. As the low shifts east through
Thursday, weak high pressure around 30.0 inches expands over much of
the eastern CONUS.



LSZ162-290800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Sun Jun 28 2026 /301 PM CDT Sun Jun 28 2026/

.LATE THIS AFTERNOON...Northeast winds 10 to 20 knots. A chance
of showers and a slight chance of thunderstorms. Waves 2 to
4 feet.
.TONIGHT...Northeast winds 10 to 20 knots veering east after
midnight. Showers and a chance of thunderstorms. Waves subsiding
to 1 to 3 feet.
.MONDAY...East winds 10 to 20 knots becoming northeast 15 to
25 knots in the afternoon. A slight chance of showers and
thunderstorms through early afternoon. Waves building to 3 to
5 feet occasionally to 7 feet.
.MONDAY NIGHT...Northeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight, then becoming west 5 to 15 knots
late. Showers likely through midnight. A chance of thunderstorms.
A chance of showers after midnight. Waves subsiding to calm to
2 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. A chance of showers and a slight chance of
thunderstorms by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots. A chance of
showers. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. A chance of showers.
Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...Southwest winds 5 to 15 knots. A chance of
showers and thunderstorms. Waves subsiding to calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots backing east. A chance
of showers. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.

$$

LSZ263-290800-
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 PM EDT Sun Jun 28 2026

.LATE THIS AFTERNOON...East winds 10 to 20 knots. A slight chance
of showers. Waves 2 to 4 feet.
.TONIGHT...East winds 10 to 20 knots veering southeast after
midnight, then backing east late. A chance of showers and
thunderstorms. Waves subsiding to 1 to 3 feet.
.MONDAY...East winds 10 to 20 knots. A slight chance of showers
and thunderstorms through early afternoon. Waves building to 2 to
4 feet.
.MONDAY NIGHT...East winds 15 to 25 knots becoming southeast
10 to 20 knots after midnight, then veering southwest late. A
chance of showers through midnight. A chance of thunderstorms.
Showers likely after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. A chance of showers and a slight chance of
thunderstorms by mid afternoon. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. A chance of showers. Waves building to 2 to
4 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots. A chance of showers.
Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. A chance of showers and
thunderstorms. Waves subsiding to calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots backing south. A chance
of showers. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots backing west. A chance of
showers. Waves calm to 2 feet.

$$

LSZ264-290800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Sun Jun 28 2026

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Waves 1 to
3 feet.
.TONIGHT...Southeast winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A chance of showers. A slight chance of
thunderstorms after midnight. Waves 1 to 3 feet.
.MONDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots late. A slight chance of showers and thunderstorms
through early afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots veering south
late. A slight chance of showers through midnight. A chance of
thunderstorms. Showers likely after midnight. Waves subsiding to
2 to 4 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. A chance of showers and a slight chance of
thunderstorms by mid afternoon. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. A chance of showers. Waves building to 2 to
4 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. Waves 2 to 4 feet.
.WEDNESDAY NIGHT...Southwest winds 5 to 15 knots. A chance of
showers. Waves subsiding to calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots backing south. Waves
calm to 2 feet.
.FRIDAY...East winds less than 10 knots veering west. A chance of
showers. Waves calm to 2 feet.

$$

LSZ265-290800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Sun Jun 28 2026

.LATE THIS AFTERNOON...East winds 15 to 25 knots. Waves 2 to
4 feet.
.TONIGHT...Southeast winds 10 to 20 knots. A slight chance of
showers through midnight, then showers likely and a chance of
thunderstorms after midnight. Waves subsiding to 1 to 3 feet,
then building to 2 to 4 feet.
.MONDAY...Southeast winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then increasing to 15 to 25 knots
late. A chance of showers and thunderstorms through early
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...Southeast winds 20 to 30 knots diminishing to
15 to 25 knots after midnight, then veering south late. Showers
likely and a chance of thunderstorms after midnight. Waves
subsiding to 1 to 3 feet.
.TUESDAY...Southwest winds 10 to 20 knots backing southeast by
mid afternoon. A chance of showers and thunderstorms by mid
afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots veering southwest
after midnight. A chance of thunderstorms through midnight. A
chance of showers. Waves building to 1 to 3 feet, then subsiding
to calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots veering west by mid
afternoon. A chance of showers. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots. A chance of
showers and thunderstorms. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots veering south. A chance of
showers and thunderstorms. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots veering west. A chance of
showers. Waves calm to 2 feet.

$$

LSZ266-290800-
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 PM EDT Sun Jun 28 2026

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Waves 1 to
3 feet.
.TONIGHT...Southeast winds 10 to 20 knots. A chance of showers
and thunderstorms after midnight. Waves building to 2 to 4 feet.
.MONDAY...Southeast winds 15 to 25 knots. A chance of showers and
thunderstorms. Waves building to 3 to 5 feet occasionally to
7 feet.
.MONDAY NIGHT...Southeast winds 15 to 25 knots veering south
late. A chance of showers and a slight chance of thunderstorms.
Waves 3 to 5 feet occasionally to 7 feet.
.TUESDAY...Southwest winds 10 to 20 knots backing southeast by
mid afternoon. A chance of showers and thunderstorms. Waves
subsiding to calm to 2 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots veering southwest
after midnight. Showers likely through midnight. A chance of
thunderstorms. A chance of showers after midnight. Waves building
to 2 to 4 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. A chance of showers.
Waves subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots. A chance of
showers and thunderstorms. Waves subsiding to calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots backing south. A chance
of showers. Waves calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots veering west. A chance of
showers. Waves calm to 2 feet.

$$

LSZ267-290800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Sun Jun 28 2026

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Waves calm to
2 feet.
.TONIGHT...Southeast winds 10 to 20 knots increasing to 15 to
25 knots late. A slight chance of showers and thunderstorms after
midnight. Waves building to 2 to 4 feet.
.MONDAY...Southeast winds 15 to 25 knots. Showers likely through
early afternoon. A chance of thunderstorms. A chance of showers
by mid afternoon. Waves building to 3 to 5 feet occasionally to
7 feet.
.MONDAY NIGHT...Southeast winds 15 to 25 knots veering south
late. A chance of showers and a slight chance of thunderstorms.
Waves subsiding to 2 to 4 feet.
.TUESDAY...South winds 10 to 20 knots backing southeast by mid
afternoon. A chance of showers and a slight chance of
thunderstorms. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Showers likely through midnight. A
chance of thunderstorms. A chance of showers after midnight.
Waves building to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. A chance of showers. Waves subsiding
to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. A chance of showers and thunderstorms. Waves calm
to 2 feet.
.THURSDAY...South winds 5 to 15 knots. A chance of showers and
thunderstorms. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots veering west. A chance of
showers. Waves calm to 2 feet.

$$

LSZ261-290200-
MAFOR 2821/
Superior West 11120 11220 12226 11220 12230 11120. A chance of
thunderstorms tonight. Waves 2 to 4 feet.

Superior North Central 11220 13320 11326 13320. Waves 2 to 3 feet
tonight. Waves 2 to 4 feet building to 3 to 5 feet Monday.

Superior South Central 11220 13320 11336 13330. A chance of
thunderstorms overnight and Monday morning. Waves 2 to 4 feet
tonight. Waves 3 to 5 feet Monday.

Superior East 11210 12310 12320 13326. A chance of thunderstorms
Monday. Waves 1 to 3 feet building to 2 to 4 feet tonight. Waves
3 to 5 feet Monday.

$$

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