713
FZUS63 KMQT 230138
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
938 PM EDT Sun Sep 22 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 will build from the Northern
Plains into northern Ontario through Monday. 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.

LSZ162-230945-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
938 PM EDT Sun Sep 22 2024 /838 PM CDT Sun Sep 22 2024/

.REST OF TONIGHT...North winds 5 to 15 knots veering northeast
late. Waves calm to 2 feet.
.MONDAY...East winds 5 to 15 knots veering south in the
afternoon, then becoming east 10 to 20 knots late. Waves calm to
2 feet.
.MONDAY NIGHT...East winds 10 to 20 knots becoming southeast 5 to
15 knots after midnight, then veering south late. Waves building
to 1 to 3 feet.
.TUESDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots by mid 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 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. Waves calm to
2 feet.
.THURSDAY...Southwest winds 5 to 15 knots backing east. Waves
calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots becoming east 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ263-230945-
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-
938 PM EDT Sun Sep 22 2024

.REST OF TONIGHT...North winds 5 to 15 knots. Waves 1 to 3 feet
subsiding to calm to 2 feet.
.MONDAY...East winds less than 10 knots becoming southeast 5 to
15 knots in the afternoon, then backing east late. Waves calm to
2 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots becoming south
5 to 15 knots late. Waves building to 2 to 4 feet, then subsiding
to 1 to 3 feet.
.TUESDAY...South winds 5 to 15 knots. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...Southwest winds 5 to 15 knots backing south. Waves
calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots backing southeast. Waves
calm to 2 feet.

$$

LSZ264-230945-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
938 PM EDT Sun Sep 22 2024

.REST OF TONIGHT...North winds 5 to 15 knots. Waves 2 to 4 feet
subsiding to calm to 2 feet.
.MONDAY...Northeast winds less than 10 knots becoming southeast
5 to 15 knots in the afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...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 by mid
afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ265-230945-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
938 PM EDT Sun Sep 22 2024

.REST OF TONIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight, then diminishing to 5 to 15 knots
late. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.MONDAY...Northeast winds 5 to 15 knots veering 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 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 by mid afternoon. 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...West winds 5 to 15 knots backing south. Waves calm to
2 feet.
.FRIDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ266-230945-
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-
938 PM EDT Sun Sep 22 2024

.REST OF TONIGHT...North winds 15 to 25 knots diminishing to
10 to 20 knots late. Waves 3 to 6 feet occasionally to 8 feet
subsiding to 2 to 4 feet.
.MONDAY...Northeast winds 5 to 15 knots. Waves subsiding to calm
to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots veering south late.
Waves calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Waves 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. Waves calm to
2 feet.
.THURSDAY...Northwest winds 5 to 15 knots backing south. Waves
calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots backing southeast. Waves calm
to 2 feet.

$$

LSZ267-230945-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
938 PM EDT Sun Sep 22 2024

.REST OF TONIGHT...Northwest winds 20 to 30 knots becoming north
15 to 25 knots after midnight, then diminishing to 10 to 20 knots
late. Waves 4 to 7 feet occasionally to 9 feet subsiding to 2 to
4 feet.
.MONDAY...Northeast winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing north late. Waves
subsiding to calm to 2 feet.
.MONDAY NIGHT...Northeast winds 10 to 20 knots veering southeast
late. Waves calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots becoming east 5 to
15 knots by mid afternoon. A slight chance of showers by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Northeast winds 5 to 15 knots becoming northwest
10 to 20 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 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots backing southeast.
Waves calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.

$$
LSZ261-230945-
MAFOR 2303/
Superior West 12810 11100 11200 12400 11310 11210. Waves 1 to 3
feet overnight. Waves 2 feet or less Monday and Monday evening.

Superior North Central 11820 11810 11800 11100 11200 11300 12310.
Waves 2 to 4 feet subsiding to 1 to 3 feet overnight. Waves 2
feet or less Monday and Monday evening.

Superior South Central 11820 12810 11110 11100 11200 12210. Waves
3 to 5 feet subsiding to 2 to 4 feet overnight. Waves 1 to 3 feet
Monday and Monday evening.

Superior East 11830 11820 13110 11100 11800 11100. Waves 3 to 6
feet overnight. Waves 2 to 4 feet subsiding to 1 to 2 feet
Monday. Waves around 1 foot Monday evening.

$$

BW

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

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