413
FZUS63 KMQT 242000
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EDT Mon Jun 24 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 29.9 inch ridge over the Upper Great Lakes tonight
will shift southeast, reaching the Appalachians Tuesday while
building to 30.0 inches. Meanwhile, a 29.3 inch low over Lake
Winnipeg will track east through Manitoba, spinning across northern
Ontario and reaching James Bay Tuesday at 29.2 inches. This low will
support 29.5 inch troughing across Lake Superior later tonight and
Tuesday. Behind the trough, 29.9 inch high pressure from the High
Plains will extend into the Upper Great Lakes Wednesday. This high
anchors and builds to 30.0 inches Thursday morning over the Upper
Great Lakes. A 29.4 inch low then tracks across central Minnesota
Friday enabling troughing at 29.6 inches over much of Lake Superior
Friday afternoon. The low fills and reaches eastern Lake Superior at
29.6 on early Saturday morning. High pressure ridging at 29.9 inches
shifts over the Upper Great Lakes Saturday afternoon.

LSZ162-250400-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EDT Mon Jun 24 2024 /300 PM CDT Mon Jun 24 2024/

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

$$

LSZ263-250400-
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-
400 PM EDT Mon Jun 24 2024

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. A slight
chance of showers. Waves calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots
after midnight, then veering southwest late. A slight chance of
showers through midnight. A chance of thunderstorms. Showers
likely after midnight. Patchy fog after midnight. Waves building
to 1 to 3 feet.
.TUESDAY...West winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. Waves building to 3 to 6 feet occasionally to
8 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots veering northeast
after midnight, then diminishing to 5 to 15 knots late. A slight
chance of showers after midnight. Waves subsiding to calm to
2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots veering southwest by
mid afternoon. A slight chance of showers through early
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 5 to 15 knots diminishing to
less than 10 knots after midnight. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. A chance of showers. Waves calm to
2 feet.
.FRIDAY...South winds 10 to 20 knots veering west. Showers
likely. A chance of showers. Waves building to 1 to 3 feet.
.SATURDAY...West winds 15 to 25 knots becoming northwest 5 to
15 knots. Waves building to 2 to 4 feet, then subsiding to calm
to 2 feet.

$$

LSZ264-250400-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EDT Mon Jun 24 2024

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then veering southwest late. A slight
chance of showers through midnight. A chance of thunderstorms.
Showers likely after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.TUESDAY...West winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. Patchy fog through early afternoon. Waves
building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...North winds 15 to 25 knots diminishing to 5 to
15 knots. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...North winds 5 to 15 knots backing west by mid
afternoon. A slight chance of showers through early afternoon.
Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots diminishing to less
than 10 knots after midnight. Waves calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. A chance of showers. Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots. Showers likely. A
chance of showers. Waves building to 2 to 4 feet.
.SATURDAY...West winds 15 to 25 knots becoming northwest 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ265-250400-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EDT Mon Jun 24 2024

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves calm
to 2 feet building to 1 to 3 feet.
.TONIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A slight chance of showers through
midnight, then showers likely and a chance of thunderstorms after
midnight. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.TUESDAY...West winds 10 to 20 knots increasing to 20 to
30 knots. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...Northwest winds 15 to 25 knots veering north
after midnight, then diminishing to 10 to 20 knots late. Waves
subsiding to 1 to 3 feet.
.WEDNESDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. A slight chance of showers through early afternoon.
Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. A chance of showers. Waves calm to 2 feet.
.FRIDAY...Southeast winds 15 to 25 knots becoming south 10 to
20 knots. Showers likely. A chance of showers. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.
.SATURDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ266-250400-
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-
400 PM EDT Mon Jun 24 2024

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves calm
to 2 feet building to 1 to 3 feet.
.TONIGHT...South winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. A slight chance of showers through
midnight, then showers likely and a chance of thunderstorms after
midnight. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.TUESDAY...Southwest winds 10 to 20 knots becoming west 15 to
25 knots in the afternoon, then increasing to 20 to 30 knots
late. Patchy fog through early afternoon. A slight chance of
showers and thunderstorms through early afternoon. Waves building
to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...Northwest winds 15 to 25 knots veering north
after midnight, then diminishing to 10 to 20 knots late. Waves
subsiding to 2 to 4 feet.
.WEDNESDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. A slight chance of showers through early afternoon.
Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 10 to 20 knots. Waves calm to
2 feet.
.FRIDAY...South winds 15 to 25 knots diminishing to 10 to
20 knots. Showers likely. A chance of showers. Waves building to
2 to 4 feet, then subsiding to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots veering northwest. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.

$$

LSZ267-250400-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EDT Mon Jun 24 2024

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Showers likely and a chance of
thunderstorms after midnight. Waves building to 2 to 4 feet.
.TUESDAY...South winds 15 to 25 knots becoming west 10 to
20 knots in the afternoon, then increasing to 15 to 25 knots
late. A chance of showers and thunderstorms through early
afternoon. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots veering northwest
after midnight, then becoming north 10 to 20 knots late. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
2 to 4 feet.
.WEDNESDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. A slight chance of showers through early afternoon.
Waves subsiding to calm to 2 feet, then building to 1 to 3 feet.
.WEDNESDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. Waves calm to 2 feet.
.FRIDAY...Southeast winds 15 to 25 knots veering south. Showers
likely. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.SATURDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots. A chance of showers. Waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet.

$$

LSZ261-250400-
MAFOR 2421/
Superior West 11210 12310 11526 12620 11630 11640. A chance of
thunderstorms overnight. Waves 2 feet or less tonight building to
2 to 5 feet Tuesday.

Superior North Central 11320 12430 11426 11526 11530 12640. A
chance of thunderstorms overnight and Tuesday morning. Waves 1 to
3 feet building to 2 to 4 feet tonight. Waves 2 to 4 feet
building to 3 to 6 feet Tuesday.

Superior South Central 11320 13430 11420 12620 11630. A chance of
thunderstorms overnight. A chance of showers and thunderstorms
Tuesday morning. Waves 1 to 4 feet.

Superior East 11320 13430 11436 11530 12620. A chance of
thunderstorms overnight and Tuesday morning. Waves 1 to 4 feet.

$$

JSS

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weather.gov/mqt/glftable

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