545
FZUS63 KMQT 231343
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
943 AM EDT Mon Sep 23 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...30.0 inch high pressure centered over Ontario is
extending into the Great Lakes today. On Tuesday, a 29.8 inch low
pressure will track northeast to lower Michigan while a weakening
29.8 inch trough lifts from northern Minnesota into Ontario. 30.0
inch high pressure builds over the Lower MS Valley Wednesday,
building to 30.1 inches Thursday. High pressure continues over the
Great Lakes Friday.



LSZ162-232145-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
943 AM EDT Mon Sep 23 2024 /843 AM CDT Mon Sep 23 2024/

.REST OF TODAY...South winds 5 to 15 knots becoming east 10 to
20 knots late. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots becoming south 5 to 15 knots
after midnight. Waves building to 2 to 4 feet, then subsiding to
1 to 3 feet.
.TUESDAY...South winds 5 to 15 knots backing east late. Waves
subsiding to calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots backing east. Waves calm to
2 feet.

$$

LSZ263-232145-
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-
943 AM EDT Mon Sep 23 2024

.REST OF TODAY...South winds 5 to 15 knots backing east late.
Waves calm to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south late.
Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.TUESDAY...South winds 5 to 15 knots backing northeast late.
Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots backing southeast. Waves
calm to 2 feet.

$$

LSZ264-232145-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
943 AM EDT Mon Sep 23 2024

.REST OF TODAY...Southeast winds less than 10 knots becoming
south 5 to 15 knots in the afternoon, then backing southeast
late. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering south late.
Waves building to 1 to 3 feet.
.TUESDAY...South winds 5 to 15 knots backing southeast in the
afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots becoming northwest
less than 10 knots after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots backing southeast. Waves calm
to 2 feet.

$$

LSZ265-232145-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
943 AM EDT Mon Sep 23 2024

.REST OF TODAY...East winds 5 to 15 knots increasing to 10 to
20 knots late. Waves calm to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots becoming south 5 to
15 knots late. Waves calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots late. Waves calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...East winds 5 to 15 knots veering southeast. Waves
calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots backing southeast. Waves calm
to 2 feet.

$$

LSZ266-232145-
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-
943 AM EDT Mon Sep 23 2024

.REST OF TODAY...Northeast winds 5 to 15 knots veering east in
the afternoon. Waves 1 to 3 feet subsiding to calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering southeast after
midnight. Waves calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots late. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots veering west after
midnight. A slight chance of showers through midnight. Waves calm
to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots veering southeast. Waves
calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ267-232145-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
943 AM EDT Mon Sep 23 2024

.REST OF TODAY...Northeast winds 10 to 20 knots diminishing to
5 to 15 knots in the afternoon, then backing north late. Waves
1 to 3 feet subsiding to calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots becoming east 10 to
20 knots after midnight, then veering southeast late. Waves calm
to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots becoming east 5 to
15 knots in the afternoon. A slight chance of showers by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 10 to 20 knots becoming north 5 to
15 knots after midnight. A chance of showers. Waves calm to
2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots backing west by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots veering southeast. Waves
calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.

$$
LSZ261-232145-
MAFOR 2315/
Superior West 11400 11410 11210 11220 11320 11420 12410. Waves 1
foot or less this afternoon. Waves 1 to 3 feet tonight and
Tuesday morning.

Superior North Central 12300 11310 12320 11420 12410. Waves 1
foot or less this afternoon. Waves 1 to 3 feet tonight and
Tuesday morning.

Superior South Central 12200 11210 13310 11400 11300. Waves 1 to
2 feet.

Superior East 11200 13100 11200 13310. Waves 2 feet or less.

$$

LC

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

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