083
FZUS63 KMQT 141402
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 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...

Weak 29.9 inch troughing remains over the lake today. 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-
1001 AM EDT Mon Jul 14 2025 /901 AM CDT Mon Jul 14 2025/

.REST OF TODAY...Southwest winds 5 to 15 knots backing south
late. Haze and areas of smoke. Waves calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots veering east after
midnight, then backing northeast late. Haze and areas of smoke. 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 and a
slight chance of thunderstorms 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-
1001 AM EDT Mon Jul 14 2025

.REST OF TODAY...Southwest winds 5 to 15 knots. Haze by late
morning. Areas of smoke. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots. Haze and areas of smoke. A
chance of showers. A chance of thunderstorms after midnight.
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 and a
slight chance of thunderstorms 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-
1001 AM EDT Mon Jul 14 2025

.REST OF TODAY...Southwest winds 5 to 15 knots. Areas of smoke.
Waves 1 to 3 feet subsiding to calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots backing east after
midnight. Areas of smoke. Haze after midnight. A chance of
showers. A 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 slight chance of
thunderstorms through early afternoon. A chance of showers. Waves
building to 1 to 3 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots backing north
after midnight. A chance of showers. Waves subsiding to 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-
1001 AM EDT Mon Jul 14 2025

.REST OF TODAY...Southwest winds 10 to 20 knots diminishing to
5 to 15 knots in the afternoon, then backing south late. Haze and
areas of smoke. Waves calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots backing east after midnight,
then veering southeast late. Areas of smoke through midnight.
Haze. A chance of showers and 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 and a slight chance of
thunderstorms. 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 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-
1001 AM EDT Mon Jul 14 2025

.REST OF TODAY...West winds 5 to 15 knots backing south late.
Haze and areas of smoke. Waves 1 to 3 feet subsiding to calm to
2 feet.
.TONIGHT...South winds 5 to 15 knots backing southeast after
midnight, then increasing to 10 to 20 knots late. Haze and areas
of smoke. 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 and a
slight chance of thunderstorms. Waves building to 1 to 3 feet.
.WEDNESDAY NIGHT...North winds 10 to 20 knots. A chance of
showers. Waves 1 to 3 feet.
.THURSDAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots. Waves building to 2 to 4 feet, then 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-
1001 AM EDT Mon Jul 14 2025

.REST OF TODAY...West winds 5 to 15 knots backing southwest late.
Haze. Waves 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. A slight chance of thunderstorms.
Showers likely by mid afternoon. Waves building to 1 to 3 feet.
.WEDNESDAY NIGHT...North winds 10 to 20 knots. Showers likely.
Waves 1 to 3 feet.
.THURSDAY...North winds 10 to 20 knots. Waves building to 2 to
4 feet, then subsiding to calm to 2 feet.
.FRIDAY...Northwest winds 10 to 20 knots becoming south 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ261-142000-
MAFOR 1415/
Superior West 12510 11400 12200 12210 11216. A chance of
thunderstorms overnight and Tuesday morning. Waves 2 feet or
less.

Superior North Central 13510 11500 11300 12210 11316. A chance of
thunderstorms overnight and Tuesday morning. Waves 1 to 3 feet.

Superior South Central 11610 11500 12400 11300 12310 11410. A
chance of showers Tuesday morning. Waves 2 feet or less.

Superior East 11600 11500 11400 11300 11200 11300 11310 11410.
Waves 1 to 3 feet.

$$

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