835
FZUS63 KMQT 301352
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
952 AM EDT Sun Jun 30 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 29.7 inch surface low continues to exit over far NE
Quebec this morning, while in its wake a 30.3 inch high pressure
currently over Minnesota settles over the western Great Lakes
region today and tonight. As the high weakens to 30.2 inches while
moving to the Lower Great Lakes by Monday 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.




LSZ162-302200-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
952 AM EDT Sun Jun 30 2024 /852 AM CDT Sun Jun 30 2024/

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

$$

LSZ263-302200-
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-
952 AM EDT Sun Jun 30 2024

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

$$

LSZ264-302200-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
952 AM EDT Sun Jun 30 2024

.REST OF TODAY...West winds 5 to 15 knots backing southwest late.
Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots backing southwest late. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing southeast late.
Waves calm to 2 feet.
.MONDAY NIGHT...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...Southeast winds 15 to 25 knots veering south by mid
afternoon. Showers likely 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 10 to 20 knots becoming southwest
5 to 15 knots after midnight. A chance of showers. Waves
subsiding to 2 to 4 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots becoming west 10 to
20 knots. Waves subsiding to 1 to 3 feet, then building to 3 to
5 feet occasionally to 7 feet.
.THURSDAY...West winds 5 to 15 knots backing southeast. Waves
subsiding to calm to 2 feet.

$$

LSZ265-302200-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
952 AM EDT Sun Jun 30 2024

.REST OF TODAY...Northwest winds 10 to 20 knots becoming west
5 to 15 knots late. Waves 1 to 3 feet subsiding to calm to
2 feet.
.TONIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon. Waves building to 1 to 3 feet.
.MONDAY NIGHT...Southeast winds 15 to 25 knots veering south
after midnight. A chance of showers after midnight. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.TUESDAY...Southeast winds 20 to 30 knots becoming south 15 to
25 knots by mid afternoon. Showers likely through early
afternoon, then a chance of showers by mid afternoon. Waves
building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. A chance of showers. Waves subsiding to calm to
2 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing southeast. A chance
of showers. Waves calm to 2 feet.

$$

LSZ266-302200-
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-
952 AM EDT Sun Jun 30 2024

.REST OF TODAY...Northwest winds 10 to 20 knots backing west
late. Waves 2 to 4 feet subsiding to calm to 2 feet, then
building to 1 to 3 feet.
.TONIGHT...West winds 5 to 15 knots. Waves subsiding to calm to
2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing southeast late.
Waves building to 1 to 3 feet.
.MONDAY NIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots 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 by mid afternoon. 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. 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.
.THURSDAY...West winds 5 to 15 knots backing southeast. Waves
subsiding to calm to 2 feet.

$$

LSZ267-302200-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
952 AM EDT Sun Jun 30 2024

.REST OF TODAY...Northwest winds 15 to 25 knots becoming west
10 to 20 knots late. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.TONIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots
after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots backing east late. Waves
calm to 2 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. A slight chance of showers after midnight. Waves
building to 1 to 3 feet.
.TUESDAY...South winds 15 to 25 knots. Showers likely. Waves
building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Showers. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves subsiding to calm
to 2 feet, then building to 1 to 3 feet.
.THURSDAY...West winds 10 to 20 knots becoming east 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$
LSZ261-302200-
MAFOR 3015/
Superior West 11600 11510 14500 11500 11400. Waves 1 foot or
less.

Superior North Central 11600 11610 12620 12610 11500 11510. Waves
1 to 3 feet.

Superior South Central 11710 11700 14600 11600 11500. Waves 2
feet or less.

Superior East 11720 11710 12610 12710 11600 11500. Waves 1 to 3
feet.

$$

LC

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

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