650
FZUS63 KMQT 011335
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
935 AM EDT Mon Jul 1 2024

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 sprawling 30.3 inch high pressure is currently over
the western Great Lakes region. As the high weakens to 30.2
inches while moving to the Lower Great Lakes this evening, a 29.6
inch low will develop over the Northern Plains. This low will
deepen to 29.4 inches while lifting into northern Ontario by
Tuesday evening. An associated 29.7 inch trough will sweep across
Lake Superior Tuesday night and Wednesday morning. In its wake, a
29.9 inch high pressure ridge will shift east, reaching the
western Great Lakes on Thursday. A 29.7 inch low pressure
organizing over the Plains on Thursday will then track to the
western Great Lakes region on Friday.



LSZ162-012145-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
935 AM EDT Mon Jul 1 2024 /835 AM CDT Mon Jul 1 2024/

.REST OF TODAY...South winds 5 to 15 knots backing east in the
afternoon, then increasing to 10 to 20 knots late. Waves calm to
2 feet.
.TONIGHT...East winds 10 to 20 knots veering southeast after
midnight. A slight chance of showers through midnight. A slight
chance of thunderstorms. Showers after midnight. Patchy fog after
midnight. Waves building to 1 to 3 feet.
.TUESDAY...Southeast winds 15 to 25 knots veering south in the
afternoon, then diminishing to 10 to 20 knots late. A slight
chance of thunderstorms through early afternoon. A chance of
showers. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots veering west
after midnight. A chance of showers and a slight chance of
thunderstorms through midnight. Waves subsiding to calm to
2 feet.
.WEDNESDAY...West winds 15 to 25 knots becoming southwest 20 to
30 knots by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots becoming northeast
10 to 20 knots. A chance of showers. Waves calm to 2 feet.
.FRIDAY...Northeast winds 10 to 20 knots backing northwest. A
chance of showers. Waves calm to 2 feet.

$$

LSZ263-012145-
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-
935 AM EDT Mon Jul 1 2024

.REST OF TODAY...South winds 5 to 15 knots backing east in the
afternoon. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering south after
midnight, then increasing to 15 to 25 knots late. A chance of
showers. A slight chance of thunderstorms after midnight. Waves
building to 2 to 4 feet.
.TUESDAY...South winds 15 to 25 knots. Showers and a slight
chance of thunderstorms through early afternoon, then a chance of
showers by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. A chance of showers and a slight
chance of thunderstorms. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...West winds 15 to 25 knots backing southwest by mid
afternoon. Waves building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY NIGHT...West winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...Southwest winds 5 to 15 knots backing east. A chance
of showers. Waves subsiding to calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots backing north. A chance
of showers. Waves calm to 2 feet.

$$

LSZ264-012145-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
935 AM EDT Mon Jul 1 2024

.REST OF TODAY...Southwest winds 5 to 15 knots backing southeast
late. Waves calm to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south after
midnight. A chance of showers after midnight. Waves building to
3 to 5 feet occasionally to 7 feet.
.TUESDAY...South winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon, then diminishing to 15 to 25 knots
late. Showers through early afternoon, then a chance of showers
by mid afternoon. Waves building to 4 to 7 feet occasionally to
9 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. A chance of showers and a slight chance of
thunderstorms. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. Waves subsiding to 1 to 3 feet, then
building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY NIGHT...West winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...West winds 5 to 15 knots backing east. Waves
subsiding to calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots backing north. A chance
of showers. Waves calm to 2 feet.

$$

LSZ265-012145-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
935 AM EDT Mon Jul 1 2024

.REST OF TODAY...Southwest winds 5 to 15 knots backing southeast
in the afternoon, then increasing to 10 to 20 knots late. Waves
calm to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south after
midnight, then backing southeast late. A chance of showers after
midnight. Waves building to 2 to 4 feet.
.TUESDAY...South winds 20 to 30 knots. Showers. A slight chance
of thunderstorms by mid afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots becoming southwest
10 to 20 knots after midnight. A chance of showers and a slight
chance of thunderstorms. Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots. Waves calm to
2 feet.
.THURSDAY...East winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of showers. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots becoming northwest 10 to
20 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ266-012145-
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-
935 AM EDT Mon Jul 1 2024

.REST OF TODAY...Southwest winds 5 to 15 knots backing southeast
late. Waves calm to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south after
midnight, then increasing to 15 to 25 knots late. A slight chance
of showers after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...South winds 15 to 25 knots increasing to 30 knots with
a few gale force gusts to 35 knots possible. Showers through
early afternoon, then a chance of showers by mid afternoon. Waves
building to 4 to 8 feet occasionally to 10 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Showers likely and a slight chance of
thunderstorms. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves subsiding to 1 to
3 feet, then building to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to
1 to 3 feet.
.THURSDAY...West winds 5 to 15 knots backing east. A chance of
showers. Waves subsiding to calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots becoming north 10 to 20 knots.
A chance of showers. Waves calm to 2 feet.

$$

LSZ267-012145-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
935 AM EDT Mon Jul 1 2024

.REST OF TODAY...West winds 5 to 15 knots backing east late.
Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots becoming south 10 to
20 knots after midnight, then backing southeast late. Waves calm
to 2 feet.
.TUESDAY...South winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A chance of showers through early
afternoon, then showers by mid afternoon. Waves building to 3 to
5 feet occasionally to 7 feet.
.TUESDAY NIGHT...South winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Showers. A slight chance of
thunderstorms after midnight. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots veering west by mid
afternoon. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing east. Waves calm to
2 feet.
.FRIDAY...East winds 10 to 20 knots backing northeast. A chance
of showers and thunderstorms. Waves calm to 2 feet.

$$
LSZ261-012145-
MAFOR 0115/
Superior West 11300 12210 12310 11320 12326. Waves 1 foot or less
this afternoon. Waves 1 to 3 feet tonight and Tuesday morning.

Superior North Central 11500 11300 11310 11320 12420 11430 11336.
Waves 1 foot or less this afternoon. Waves 1 to 2 feet building
to 2 to 4 feet tonight. Waves 3 to 6 feet Tuesday morning.

Superior South Central 11300 11310 12320 11420 11320 11420 11436.
Waves 2 feet or less this afternoon. Waves 2 to 4 feet tonight
and Tuesday morning.

Superior East 11500 11400 12310 12410 11320 11430. A chance of
showers Tuesday morning. Waves 1 to 3 feet this afternoon and
tonight. Waves 2 to 4 feet Tuesday morning.

$$

LC

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes