489
FZUS63 KMQT 142001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EDT Tue Apr 14 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...

Weak ridging of around 29.8 to 29.9 inches moves back over Lake
Superior from northern Ontario tonight through Wednesday before
another low from the Central Plains lifts through Lower Michigan or
closer to the Straits at around 29.7 inches. Ridging increases to
29.8 inches over Lake Superior later in the day Thursday before
troughing of 29.4 to 29.6 inches moves across the lake Friday
through Saturday. This deepens further to 29.0 inches over far
northern Quebec by Sunday morning. 30.2 inch ridging builds in over
Lake Superior for Sunday night.


LSZ162-150800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EDT Tue Apr 14 2026 /300 PM CDT Tue Apr 14 2026/

...DENSE FOG ADVISORY IN EFFECT FROM 11 PM EDT /10 PM CDT/ THIS
EVENING TO 11 AM EDT /10 AM CDT/ WEDNESDAY...

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Patchy fog.
Waves 1 to 3 feet subsiding to calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots backing north after
midnight. Patchy fog through midnight, then areas of dense fog
after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots backing northeast in the
afternoon. Areas of fog. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots. Patchy fog
through midnight. Waves calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Northeast winds 10 to 20 knots. Waves building
to 1 to 3 feet.
.FRIDAY...Northeast winds 10 to 20 knots. A chance of rain
showers by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY NIGHT...North winds 15 to 25 knots becoming northwest
20 to 30 knots after midnight. Rain showers and a chance of
thunderstorms through midnight, then a chance of rain showers
after midnight. Waves building to 4 to 8 feet occasionally to
10 feet.
.SATURDAY...West winds 20 to 30 knots becoming northwest gales to
35 knots. A chance of rain showers. A chance of snow showers.
Waves building to 6 to 9 feet occasionally to 11 feet.
.SUNDAY...Northwest gales to 35 knots diminishing to 5 to
15 knots. Waves subsiding to 1 to 3 feet.

$$

LSZ263-150800-
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-
400 PM EDT Tue Apr 14 2026

...DENSE FOG ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 11 AM
EDT WEDNESDAY...

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Patchy fog.
A slight chance of rain showers and drizzle. Waves calm to
2 feet.
.TONIGHT...Northeast winds 5 to 15 knots becoming north less than
10 knots after midnight. Areas of dense fog. A slight chance of
drizzle. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds less than 10 knots. A slight chance
of drizzle through early afternoon. Areas of dense fog through
early afternoon, then patchy fog by mid afternoon. Waves calm to
2 feet.
.WEDNESDAY NIGHT...East winds less than 10 knots backing
northeast late. Patchy fog through midnight. A slight chance of
rain showers through midnight. Waves calm to 2 feet.
.THURSDAY...Northeast winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots. Waves building to
2 to 4 feet.
.FRIDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. A chance of rain showers by mid afternoon.
Waves building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...South winds 20 to 30 knots veering west after
midnight. A chance of thunderstorms through midnight. Rain
showers. Waves building to 6 to 9 feet occasionally to 11 feet.
.SATURDAY...West gales to 35 knots veering northwest. A chance of
rain showers. A chance of snow showers. Waves building to 10 to
14 feet occasionally to 18 feet.
.SUNDAY...Northwest gales to 35 knots diminishing to 10 to
20 knots. Waves subsiding to 4 to 7 feet occasionally to 9 feet.

$$

LSZ264-150800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EDT Tue Apr 14 2026

...DENSE FOG ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 11 AM
EDT WEDNESDAY...

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Patchy fog.
A chance of rain showers and a slight chance of drizzle. Waves
calm to 2 feet.
.TONIGHT...Northeast winds less than 10 knots backing north after
midnight. Areas of dense fog. A slight chance of drizzle. Waves
calm to 2 feet.
.WEDNESDAY...North winds less than 10 knots veering northeast in
the afternoon. A slight chance of drizzle through early
afternoon. Areas of dense fog through early afternoon, then
patchy fog by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds less than 10 knots veering
southeast after midnight, then backing east late. Patchy fog
through midnight. Waves calm to 2 feet.
.THURSDAY...East winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots. Waves building to
2 to 4 feet.
.FRIDAY...East winds 10 to 20 knots becoming southeast 15 to
25 knots by mid afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY NIGHT...Southeast winds 20 to 30 knots becoming south
gales to 35 knots after midnight. Rain showers. Snow showers
likely after midnight. Waves building to 8 to 11 feet
occasionally to 14 feet.
.SATURDAY...Northwest gales to 45 knots. A chance of rain
showers. A chance of snow showers. Waves subsiding to 7 to
10 feet occasionally to 13 feet, then building to 11 to 15 feet
occasionally to 19 feet.
.SUNDAY...Northwest gales to 40 knots diminishing to 15 to
25 knots. Waves subsiding to 5 to 8 feet occasionally to 10 feet,
then building to 6 to 9 feet occasionally to 11 feet.

$$

LSZ265-150800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EDT Tue Apr 14 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT WEDNESDAY...

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Patchy dense
fog. A slight chance of rain showers and drizzle. Waves calm to
2 feet.
.TONIGHT...East winds 5 to 15 knots backing northwest after
midnight. Areas of dense fog. A slight chance of drizzle. Waves
calm to 2 feet.
.WEDNESDAY...North winds 5 to 15 knots veering northeast late. A
slight chance of drizzle through early afternoon. Areas of dense
fog through early afternoon, then patchy fog by mid afternoon.
Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots veering southeast
after midnight, then backing east late. Patchy fog through
midnight. A slight chance of rain showers. Waves calm to 2 feet.
.THURSDAY...East winds 10 to 20 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots veering southeast
after midnight. Waves building to 1 to 3 feet.
.FRIDAY...Southeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY NIGHT...South gales to 35 knots. Rain showers. Waves
building to 6 to 10 feet occasionally to 13 feet.
.SATURDAY...West gales to 40 knots. Rain showers likely. A chance
of snow showers. Waves building to 10 to 14 feet occasionally to
18 feet.
.SUNDAY...Northwest gales to 40 knots diminishing to 20 to
30 knots. Waves subsiding to 4 to 7 feet occasionally to 9 feet.

$$

LSZ266-150800-
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-
400 PM EDT Tue Apr 14 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT WEDNESDAY...

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Patchy dense
fog. A slight chance of rain showers and drizzle. Waves calm to
2 feet.
.TONIGHT...East winds 5 to 15 knots backing north after midnight.
Areas of dense fog. A slight chance of drizzle. Waves calm to
2 feet.
.WEDNESDAY...North winds 5 to 15 knots. A slight chance of
drizzle through early afternoon. Areas of dense fog through early
afternoon, then patchy fog by mid afternoon. Waves calm to
2 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots backing north
after midnight. Patchy fog through midnight. A chance of rain
showers. Waves calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. A slight chance of rain showers. Waves
calm to 2 feet.
.THURSDAY NIGHT...Northeast winds 10 to 20 knots veering east
after midnight. Waves building to 1 to 3 feet.
.FRIDAY...Southeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY NIGHT...Southeast gales to 35 knots becoming south gales
to 40 knots after midnight. A chance of rain showers through
midnight. Rain showers after midnight. Waves building to 9 to
12 feet occasionally to 15 feet.
.SATURDAY...West gales to 45 knots. Rain showers likely. A chance
of snow showers. A chance of rain showers. Waves building to
10 to 14 feet occasionally to 18 feet, then subsiding to 9 to
12 feet occasionally to 15 feet.
.SUNDAY...Northwest gales to 45 knots. Waves subsiding to 8 to
11 feet occasionally to 14 feet.

$$

LSZ267-150800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EDT Tue Apr 14 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT WEDNESDAY...

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Areas of dense
fog. A slight chance of drizzle. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering southeast after
midnight, then backing north late. Areas of dense fog. A slight
chance of drizzle. Waves calm to 2 feet.
.WEDNESDAY...North winds 5 to 15 knots. A slight chance of
drizzle through early afternoon. Widespread dense fog through
early afternoon, then patchy fog by mid afternoon. Waves calm to
2 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots. Patchy fog through
midnight. A chance of rain showers. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots. A slight chance of rain
showers. Waves calm to 2 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves building to 2 to 4 feet.
.FRIDAY NIGHT...Southeast winds 20 to 30 knots increasing to
gales to 35 knots after midnight. A chance of rain showers
through midnight, then rain showers likely after midnight. Waves
building to 6 to 9 feet occasionally to 11 feet.
.SATURDAY...West gales to 40 knots. Rain showers, possibly mixed
with snow, then a chance of snow showers, possibly mixed with
rain. Waves building to 15 to 20 feet occasionally to 25 feet.
.SUNDAY...Northwest gales to 40 knots diminishing to 20 to
30 knots. A chance of snow showers. Waves subsiding to 9 to
12 feet occasionally to 15 feet.

$$

LSZ261-150200-
MAFOR 1421/
Superior West 11110 12100 12804 11204 12100. Waves 1 to 3 feet
tonight. Waves 1 foot or less Wednesday.

Superior North Central 11100 12104 13804 11800 11100. A chance of
rain showers early, then a chance of drizzle and rain showers
this evening. Waves 2 feet or less.

Superior South Central 11200 19204 11204 11804 13704 11700 11800.
Waves 2 feet or less.

Superior East 13204 11104 12804 12800. Waves 1 foot or less.

$$

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