063
FZUS63 KMQT 041401
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 AM EDT Sat May 4 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...Weak ridging of 30.0 inches holds across eastern Lake
Superior this morning before a weak 29.9 inch trough moves into
the Upper Great Lakes this evening. Ridging at 30.1 inches
returns across the lake on Sunday. Ridging shifts east early next
week as a broad 29.2 inch low pressure develops on the Northern
Plains on Monday. A strong pressure gradient over western Lake
Superior begins to setup Tuesday morning as a deepening 29.0 inch
low pushes eastward against 30.0 inch ridging over far northern
Ontario. A secondary 29.4 inch low pressure moves into southern
Lake Superior Wednesday morning.

LSZ162-042200-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 AM EDT Sat May 4 2024 /901 AM CDT Sat May 4 2024/

.REST OF TODAY...Northwest winds 5 to 15 knots veering north in
the afternoon, then backing northwest late. Rain showers likely.
Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots increasing to 10 to 20 knots
late. A slight chance of rain showers through midnight. Waves
calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots backing southwest in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots backing east after
midnight. Waves calm to 2 feet.
.MONDAY...East winds 10 to 20 knots becoming northeast 15 to
25 knots by mid afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet.
.MONDAY NIGHT...East winds 15 to 25 knots. A chance of rain
showers after midnight. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...East winds 15 to 25 knots backing northeast. Rain
showers. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 1 to 3 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots. A chance of rain showers. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.

$$

LSZ263-042200-
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-
1001 AM EDT Sat May 4 2024

.REST OF TODAY...North winds 5 to 15 knots. A chance of rain
showers. Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots backing west after
midnight. A slight chance of rain showers through midnight. Waves
calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots backing southwest late. Waves
building to 1 to 3 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots backing south after
midnight. Waves subsiding to calm to 2 feet.
.MONDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. Waves building to 2 to 4 feet.
.MONDAY NIGHT...East winds 10 to 20 knots. Waves subsiding to
1 to 3 feet, then building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...East winds 15 to 25 knots. Rain showers. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
2 to 4 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots. A chance of rain
showers. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.

$$

LSZ264-042200-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 AM EDT Sat May 4 2024

.REST OF TODAY...West winds less than 10 knots becoming northeast
5 to 15 knots in the afternoon, then backing north late. A chance
of rain showers. Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then diminishing to 5 to 15 knots late.
A chance of rain showers through midnight. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.SUNDAY...West winds 5 to 15 knots backing southwest late. Waves
1 to 3 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.MONDAY...South winds 5 to 15 knots becoming east 10 to 20 knots
by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 10 to 20 knots veering southeast after
midnight. Waves building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...East winds 15 to 25 knots. A chance of rain showers,
then rain showers likely. Waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 2 to 4 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots. A chance of rain
showers. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.

$$

LSZ265-042200-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 AM EDT Sat May 4 2024

.REST OF TODAY...Southeast winds 5 to 15 knots becoming east
10 to 20 knots in the afternoon, then backing north late. A
chance of rain showers by mid afternoon. Waves calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots becoming west 15 to
25 knots after midnight, then diminishing to 10 to 20 knots late.
A chance of rain showers through midnight. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.SUNDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots
late. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.MONDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots. Waves building to
1 to 3 feet.
.TUESDAY...East winds 15 to 25 knots. Showers. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 1 to
3 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots. A chance of rain showers. Waves 1 to 3 feet.

$$

LSZ266-042200-
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-
1001 AM EDT Sat May 4 2024

.REST OF TODAY...Southeast winds 10 to 20 knots. A chance of rain
showers by mid afternoon. Waves calm to 2 feet building to 1 to 3
feet.
.TONIGHT...Northwest winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of rain showers. Waves building
to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...Northwest winds 10 to 20 knots backing west in the
afternoon, then diminishing to 5 to 15 knots late. Waves
subsiding to 1 to 3 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots backing southwest after
midnight. Waves subsiding to calm to 2 feet.
.MONDAY...South winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 10 to 20 knots veering southeast after
midnight. Waves building to 1 to 3 feet.
.TUESDAY...East winds 15 to 25 knots. Rain showers likely. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
2 to 4 feet.
.WEDNESDAY...Northeast winds 15 to 25 knots. A chance of rain
showers. Waves subsiding to 1 to 3 feet.

$$

LSZ267-042200-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 AM EDT Sat May 4 2024

.REST OF TODAY...Southeast winds 10 to 20 knots. A chance of rain
showers by mid afternoon. Waves calm to 2 feet building to 1 to
3 feet.
.TONIGHT...Southeast winds 10 to 20 knots becoming west 15 to
25 knots after midnight. Rain showers likely through midnight. A
slight chance of thunderstorms. A chance of rain showers after
midnight. Waves building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots
in the afternoon. Waves subsiding to 1 to 3 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots becoming southwest 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...South winds 5 to 15 knots becoming east 10 to 20 knots
by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 10 to 20 knots veering southeast after
midnight. Waves building to 1 to 3 feet.
.TUESDAY...Southeast winds 15 to 25 knots backing east. Rain
showers likely. Waves building to 2 to 4 feet, then subsiding to
1 to 3 feet.
.WEDNESDAY...East winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of showers. Waves subsiding to calm to 2 feet.

$$
LSZ261-042200-
MAFOR 0415/
Superior West 12816 11700 11600 14610. Waves 1 to 2 feet.

Superior North Central 12100 11800 11810 12720 12710. A chance of
showers this afternoon. A chance of rain showers this evening.
Waves 1 to 3 feet.

Superior South Central 11310 11210 11110 12720 11730 12620. A
chance of showers this afternoon. A chance of rain showers this
evening. Waves 1 foot or less this afternoon. Waves 1 to 3 feet
building to 2 to 4 feet tonight. Waves 2 to 4 feet Sunday morning.


Superior East 11310 12320 11326 11626 11630 11730 11720. Waves 1
to 3 feet this afternoon. Waves 2 to 3 feet building to 3 to 5
feet tonight. Waves 3 to 5 feet Sunday morning.

$$

Voss

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

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