464
FZUS63 KMQT 140802
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
402 AM EDT Mon Jul 14 2025

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...

29.9 inch troughing currently over the lake associated with a 29.2
inch low over eastern Hudson Bay will lift north today while 30.0 to
30.1 inch high pressure expands over much of the eastern CONUS.
Tonight through Tuesday night, a 29.7 inch low over the High Plains
will pass a 29.9 inch trough over Lake Superior. Wednesday through
Friday, a 30.1 inch high pressure will slowly move from the Canadian
Prairie to Lake Superior, reaching the Lower Great Lakes Saturday.
Saturday evening, a 29.9 inch low pressure will move from the
Northern Plains over the lake.


LSZ162-142000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
402 AM EDT Mon Jul 14 2025 /302 AM CDT Mon Jul 14 2025/

.EARLY THIS MORNING...West winds 5 to 15 knots. Haze. Waves calm
to 2 feet.
.TODAY...Southwest winds 5 to 15 knots backing south late. Haze
through early afternoon. Areas of smoke. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots becoming northeast 10 to
20 knots late. Areas of smoke. Haze after midnight. A chance of
showers and thunderstorms. Waves calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots backing north in the
afternoon. Showers and a chance of thunderstorms. Waves calm to
2 feet.
.TUESDAY NIGHT...Northeast winds 10 to 20 knots. Showers and a
chance of thunderstorms. Waves building to 1 to 3 feet.
.WEDNESDAY...Northeast winds 15 to 25 knots. Showers likely
through early afternoon, then a chance of showers by mid
afternoon. Waves building to 2 to 4 feet.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 knots. A chance of
showers. Waves subsiding to calm to 2 feet.
.THURSDAY...Northeast winds 10 to 20 knots becoming west 5 to
15 knots. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots backing east. Waves calm
to 2 feet.

$$

LSZ263-142000-
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-
402 AM EDT Mon Jul 14 2025

.EARLY THIS MORNING...West winds 5 to 15 knots. Haze. Waves 1 to
3 feet.
.TODAY...West winds 5 to 15 knots backing southwest in the
afternoon. Haze through early afternoon. Areas of smoke. Waves
subsiding to calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots. Areas of smoke. Haze after
midnight. A chance of showers and a slight chance of
thunderstorms. Waves calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots veering west in the
afternoon, then veering north late. Showers and a chance of
thunderstorms. Waves calm to 2 feet.
.TUESDAY NIGHT...Northeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. Showers and a chance of
thunderstorms. Waves building to 1 to 3 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots. Showers likely
through early afternoon, then a chance of showers by mid
afternoon. Waves building to 2 to 4 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots. A chance of
showers. Waves subsiding to calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots backing west. Waves
calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots backing south. Waves calm
to 2 feet.

$$

LSZ264-142000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
402 AM EDT Mon Jul 14 2025

.EARLY THIS MORNING...West winds 5 to 15 knots. Waves 2 to 4 feet
subsiding to 1 to 3 feet.
.TODAY...West winds 5 to 15 knots backing southwest in the
afternoon. Haze. Areas of smoke by mid afternoon. Waves subsiding
to calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots backing southeast after
midnight, then backing east late. Areas of smoke. Haze after
midnight. A chance of showers. A slight chance of thunderstorms
after midnight. Waves calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots veering west in the
afternoon, then veering northwest late. Showers likely and a
chance of thunderstorms. Waves calm to 2 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots becoming northeast
10 to 20 knots after midnight. A chance of thunderstorms through
midnight. Showers likely. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots. A chance of showers.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots backing north
after midnight. A chance of showers. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots backing west. Waves calm to
2 feet.
.FRIDAY...Southwest winds 5 to 15 knots backing south. Waves calm
to 2 feet.

$$

LSZ265-142000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
402 AM EDT Mon Jul 14 2025

.EARLY THIS MORNING...West winds 10 to 20 knots. Waves calm to
2 feet.
.TODAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon, then backing south late. Haze. Areas of smoke
by mid afternoon. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots backing east after
midnight, then veering southeast late. Haze. A chance of showers
and a slight chance of thunderstorms after midnight. Waves calm
to 2 feet.
.TUESDAY...South winds 10 to 20 knots veering southwest in the
afternoon, then veering northwest late. A chance of showers
through early afternoon. A chance of thunderstorms. Showers
likely by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots. Showers likely and a
chance of thunderstorms. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Showers likely. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 10 to 20 knots. A chance of
showers. Waves calm to 2 feet.
.THURSDAY...North winds 10 to 20 knots becoming west 5 to
15 knots. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots veering south. Waves calm to
2 feet.

$$

LSZ266-142000-
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-
402 AM EDT Mon Jul 14 2025

.EARLY THIS MORNING...West winds 10 to 20 knots. Haze. Waves 1 to
3 feet.
.TODAY...West winds 5 to 15 knots backing south late. Haze. Waves
subsiding to calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots late. Areas of smoke through midnight. Haze. A chance of
showers and a slight chance of thunderstorms after midnight.
Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots veering northwest late. A
chance of showers through early afternoon. A chance of
thunderstorms. Showers likely by mid afternoon. Waves calm to
2 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots. Showers likely and a
chance of thunderstorms. Waves calm to 2 feet.
.WEDNESDAY...North winds 10 to 20 knots. Showers likely. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...North winds 10 to 20 knots. A chance of
showers. Waves building to 1 to 3 feet.
.THURSDAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots. Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing south. Waves calm to
2 feet.

$$

LSZ267-142000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
402 AM EDT Mon Jul 14 2025

.EARLY THIS MORNING...Southwest winds 10 to 20 knots. Haze. Waves
1 to 3 feet.
.TODAY...Southwest winds 5 to 15 knots veering west in the
afternoon. Haze. Waves subsiding to calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering southeast after
midnight, then increasing to 10 to 20 knots late. Haze. A slight
chance of showers and thunderstorms after midnight. Waves calm to
2 feet.
.TUESDAY...South winds 10 to 20 knots veering southwest late. A
chance of showers and thunderstorms. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots veering north after
midnight. Showers likely through midnight. A chance of
thunderstorms. A chance of showers after midnight. Waves calm to
2 feet.
.WEDNESDAY...North winds 10 to 20 knots. A chance of showers
through early afternoon. Showers likely by mid afternoon. Waves
calm to 2 feet.
.WEDNESDAY NIGHT...North winds 10 to 20 knots. Showers likely.
Waves building to 1 to 3 feet.
.THURSDAY...North winds 10 to 20 knots. Waves subsiding to calm
to 2 feet.
.FRIDAY...Northwest winds 10 to 20 knots becoming south 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ261-141400-
MAFOR 1409/
Superior West 11610 11600 12510 11400 11100 11200 11210. A chance
of showers overnight. Waves 2 feet or less.

Superior North Central 11620 11610 13510 11500 11300 11310. A
chance of showers overnight. Waves 2 to 4 feet subsiding to 1 to
2 feet today. Waves around 1 foot tonight.

Superior South Central 11620 12610 11600 11400 12300 11310. Waves
2 feet or less.

Superior East 11520 11510 12600 11500 13300. Waves 1 to 3 feet
today. Waves 1 foot or less 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