504
FZUS63 KMQT 031337
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
937 AM EDT Mon Jun 3 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 29.6 inch low pressure trough is currently over
Minnesota this morning. This trough will then dissipate this
afternoon before reaching Lake Superior, leaving Lake Superior
between 30.0 inch ridging over Quebec into the Lower Great Lakes
and a new trough of 29.4 inches emerging over the western Dakotas.
On Tuesday, 29.2 inch low pressure tracking across the Canadian
Prairies will power the trough eastward to the Upper Mississippi
Valley. The trough will then sail across Lake Superior Tuesday
night and Wednesday morning while the parent low pressure tracks
from the Canadian Prairies toward northern Ontario. On Thursday,
the low, weakening to 29.3 inches, will drift southeast across
northern Ontario while a 30.0 inch high pressure ridge builds
southeast into the Central Plains. This ridge will drift toward
the Mississippi Valley on Friday while the low over northern
Ontario, between Georgian Bay and James Bay, weakens to 29.5
inches.

LSZ162-032145-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
937 AM EDT Mon Jun 3 2024 /837 AM CDT Mon Jun 3 2024/

.REST OF TODAY...Southeast winds 10 to 20 knots backing northeast
in the afternoon, then veering east late. Patchy fog. Scattered
showers and a slight chance of thunderstorms. Waves 2 to 4 feet
subsiding to 1 to 3 feet.
.TONIGHT...East winds 5 to 15 knots backing northeast after
midnight. Patchy fog. A slight chance of thunderstorms through
midnight. A chance of rain showers. Waves subsiding to calm to 2
feet.
.TUESDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots in the afternoon, then becoming east 15 to 25 knots
late. Patchy fog. A chance of showers. A chance of thunderstorms
by mid afternoon. Waves building to 1 to 3 feet.
.TUESDAY NIGHT...East winds 10 to 20 knots veering southwest
after midnight. Showers and a chance of thunderstorms. Waves
subsiding to calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of showers. Waves building to
2 to 4 feet.
.WEDNESDAY NIGHT...West winds 15 to 25 knots. A chance of
showers. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.
.THURSDAY...West winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of showers. Waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 2 to 4 feet.
.FRIDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ263-032145-
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-
937 AM EDT Mon Jun 3 2024

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

$$

LSZ264-032145-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
937 AM EDT Mon Jun 3 2024

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

$$

LSZ265-032145-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
937 AM EDT Mon Jun 3 2024

.REST OF TODAY...Southeast winds 15 to 25 knots. Showers by late
morning, then scattered showers and a slight chance of
thunderstorms by mid afternoon. Waves 1 to 3 feet building to
2 to 4 feet.
.TONIGHT...Southeast winds 10 to 20 knots diminishing to 5 to
15 knots late. Patchy fog. A chance of showers and a slight
chance of thunderstorms. Waves subsiding to calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots increasing to 15 to
25 knots. Patchy fog. A slight chance of showers and thunderstorms
by mid afternoon. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...Southeast winds 15 to 25 knots becoming south
10 to 20 knots after midnight. A chance of showers through
midnight. A chance of thunderstorms. Showers likely after
midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots backing south by mid
afternoon. Showers likely through early afternoon. A chance of
thunderstorms. A chance of showers by mid afternoon. Waves calm
to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots veering west
after midnight. A chance of showers. Waves calm to 2 feet.
.THURSDAY...West winds 15 to 25 knots. A chance of showers. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
.FRIDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ266-032145-
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-
937 AM EDT Mon Jun 3 2024

.REST OF TODAY...Southeast winds 15 to 25 knots veering south
late. Numerous showers by late morning, then scattered showers
and a slight chance of thunderstorms by mid afternoon. Waves 2 to
4 feet building to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...South winds 10 to 20 knots backing southeast after
midnight. Patchy fog. A chance of showers and a slight chance of
thunderstorms. Waves subsiding to 1 to 3 feet.
.TUESDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots late. Patchy fog. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...Southeast winds 15 to 25 knots becoming south
10 to 20 knots after midnight. A chance of showers through
midnight. A chance of thunderstorms. Showers likely after
midnight. Waves 2 to 4 feet.
.WEDNESDAY...South winds 10 to 20 knots. Showers and a chance of
thunderstorms. Waves subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots veering west
after midnight. A chance of showers. Waves 1 to 3 feet.
.THURSDAY...West winds 15 to 25 knots. A chance of showers. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet.
.FRIDAY...Northwest winds 15 to 25 knots becoming west 10 to
20 knots. Waves subsiding to 1 to 3 feet.

$$

LSZ267-032145-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
937 AM EDT Mon Jun 3 2024

.REST OF TODAY...Southeast winds 10 to 20 knots. Scattered
showers by mid afternoon. Waves calm to 2 feet building to 1 to
3 feet.
.TONIGHT...Southeast winds 10 to 20 knots. Patchy fog. A chance
of showers and a slight chance of thunderstorms. Waves 1 to
3 feet.
.TUESDAY...Southeast winds 10 to 20 knots. A slight chance of
showers through early afternoon. Patchy fog. Waves 1 to 3 feet.
.TUESDAY NIGHT...Southeast winds 15 to 25 knots. A chance of
showers and a slight chance of thunderstorms. Waves building to
2 to 4 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots veering southwest by
mid afternoon. Showers and a chance of thunderstorms. Waves
subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots. A chance of
showers. Waves calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots. A chance of showers. Waves
building to 2 to 4 feet.
.FRIDAY...Northwest winds 10 to 20 knots. Waves subsiding to 1 to
3 feet.

$$
LSZ261-032145-
MAFOR 0315/
Superior West 11320 19326 11410 11310 12200 12200 19204 11210.
Waves 1 to 4 feet.

Superior North Central 11336 11330 19336 12320 12310 12300. Waves
2 to 5 feet this afternoon and tonight. Waves 1 to 3 feet Tuesday
morning.

Superior South Central 11326 12320 19326 11320 12310 11300 11310.
Waves 1 to 4 feet.

Superior East 11320 12320 19326 12320 13310. Waves 2 to 4 feet.

$$

GS

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

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