662
FZUS63 KMQT 052005
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
405 PM EDT Wed Jun 5 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...The cold front associated with a 29.2 inch low
approaching Lake Winnipeg will support troughing of 29.4 inches
across Lake Superior into early this evening before the parent low
pressure spins into northern Ontario Thursday morning. The
troughing over Lake Superior weakens to 29.6 inches Friday as the
low fills to 29.4 inches over southern James Bay. Weak troughing
at 29.7 inches remains in place over Lake Superior Saturday before
weak ridging near 29.8 inches develops over Lake Superior on
Sunday as a high pressure shifts into the Canadian Prairies. The
ridge builds to 30.0 inches over Lake Superior Monday.

LSZ162-060415-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
405 PM EDT Wed Jun 5 2024 /305 PM CDT Wed Jun 5 2024/

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. A chance
of showers and a slight chance of thunderstorms. Waves 1 to
3 feet.
.TONIGHT...Southwest winds 10 to 20 knots veering west late. A
chance of rain showers and a slight chance of thunderstorms.
Waves building to 2 to 4 feet.
.THURSDAY...West winds 20 to 30 knots. A chance of showers. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots. A slight chance of
showers after midnight. Waves subsiding to 1 to 3 feet, then
building to 2 to 4 feet.
.FRIDAY...West winds 15 to 25 knots. A slight chance of showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.FRIDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 15 to 25 knots. A chance of showers. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.SATURDAY NIGHT...West winds 15 to 25 knots veering northwest
after midnight. A chance of showers. Waves subsiding to calm to
2 feet.
.SUNDAY...Northwest winds 10 to 20 knots becoming north 5 to
15 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.MONDAY...South winds 5 to 15 knots veering west. Waves calm to
2 feet.

$$

LSZ263-060415-
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-
405 PM EDT Wed Jun 5 2024

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. A chance
of showers and a slight chance of thunderstorms. Waves calm to
2 feet building to 1 to 3 feet.
.TONIGHT...Southwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then veering west late. A slight chance
of showers and thunderstorms. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots. A chance of showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then increasing to 15 to 25 knots late.
A slight chance of showers. Waves subsiding to 2 to 4 feet.
.FRIDAY...West winds 15 to 25 knots. A slight chance of showers.
Waves building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots. A chance of showers. Waves
building to 2 to 4 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots veering northwest
after midnight. A chance of showers. Waves subsiding to 1 to
3 feet.
.SUNDAY...Northwest winds 10 to 20 knots becoming north 5 to
15 knots. Waves subsiding to calm to 2 feet.
.MONDAY...North winds 5 to 15 knots backing southwest. Waves calm
to 2 feet.

$$

LSZ264-060415-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
405 PM EDT Wed Jun 5 2024

.LATE THIS AFTERNOON...South winds 5 to 15 knots. A slight chance
of showers and thunderstorms. Waves 2 to 4 feet subsiding to 1 to
3 feet.
.TONIGHT...South winds 5 to 15 knots veering west late. A slight
chance of rain showers. Patchy fog after midnight. Waves building
to 2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots. A chance of rain showers.
Waves building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then increasing to 15 to 25 knots late.
A chance of showers. Waves subsiding to 3 to 5 feet occasionally
to 7 feet.
.FRIDAY...West winds 15 to 25 knots. A chance of showers. Waves
3 to 5 feet occasionally to 7 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A chance of showers. Waves subsiding to
1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots. A chance of showers. Waves
building to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots. A chance of
showers. Waves subsiding to 1 to 3 feet.
.SUNDAY...Northwest winds 10 to 20 knots becoming north 5 to
15 knots. Waves 1 to 3 feet.
.MONDAY...North winds 5 to 15 knots backing southwest. Waves
subsiding to calm to 2 feet.

$$

LSZ265-060415-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
405 PM EDT Wed Jun 5 2024

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. A chance of
showers and thunderstorms. Waves calm to 2 feet.
.TONIGHT...South winds 10 to 20 knots veering west late. A chance
of showers and a slight chance of thunderstorms. Waves building
to 1 to 3 feet.
.THURSDAY...West winds 10 to 20 knots increasing to 20 to
30 knots. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight, then increasing to 20 to 30 knots late.
A chance of showers. Waves subsiding to 2 to 4 feet, then
building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...West winds 20 to 30 knots. A chance of showers. Waves
subsiding to 1 to 3 feet.
.FRIDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of showers. Waves subsiding to
calm to 2 feet.
.SATURDAY...West winds 15 to 25 knots. A chance of showers. Waves
calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. A chance of showers. Waves calm to
2 feet.
.SUNDAY...Northwest winds 10 to 20 knots. Waves building to 1 to
3 feet.
.MONDAY...North winds 10 to 20 knots becoming southwest 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ266-060415-
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-
405 PM EDT Wed Jun 5 2024

.LATE THIS AFTERNOON...South winds 5 to 15 knots. Patchy fog. A
slight chance of showers and thunderstorms. Waves 2 to 4 feet
subsiding to 1 to 3 feet.
.TONIGHT...South winds 10 to 20 knots veering southwest late.
Patchy fog. A chance of rain showers and a slight chance of
thunderstorms. Waves subsiding to calm to 2 feet, then building
to 2 to 4 feet.
.THURSDAY...West winds 10 to 20 knots increasing to 15 to
25 knots late. A chance of rain showers. Waves building to 3 to
6 feet occasionally to 8 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots increasing to 20 to
30 knots late. A chance of showers. Waves building to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY...West winds 20 to 30 knots diminishing to 15 to 25 knots
by mid afternoon. A chance of showers. Waves 4 to 7 feet
occasionally to 9 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots backing west after
midnight. A chance of showers. Waves subsiding to 2 to 4 feet.
.SATURDAY...West winds 15 to 25 knots. A chance of showers. Waves
2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots. A chance of
showers. Waves subsiding to 1 to 3 feet.
.SUNDAY...Northwest winds 15 to 25 knots becoming north 10 to
20 knots. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.MONDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ267-060415-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
405 PM EDT Wed Jun 5 2024

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Patchy fog.
A chance of showers. Waves 1 to 3 feet subsiding to calm to
2 feet.
.TONIGHT...Southeast winds 5 to 15 knots becoming south 10 to
20 knots after midnight, then becoming southwest 5 to 15 knots
late. Patchy fog. A chance of showers and thunderstorms. Waves
calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. A chance of showers. Waves building to 3 to
5 feet occasionally to 7 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots. A chance of showers.
Waves building to 4 to 7 feet occasionally to 9 feet.
.FRIDAY...West winds 20 to 30 knots diminishing to 15 to 25 knots
by mid afternoon. A chance of showers. Waves building to 5 to
8 feet occasionally to 10 feet.
.FRIDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of showers. Waves subsiding to
2 to 4 feet.
.SATURDAY...West winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of showers. Waves 2 to
4 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots veering northwest
after midnight. A chance of showers. Waves subsiding to 1 to
3 feet.
.SUNDAY...Northwest winds 10 to 20 knots veering north. Waves
1 to 3 feet.
.MONDAY...Northwest winds 10 to 20 knots becoming southwest 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ261-060415-
MAFOR 0521/
Superior West 11520 11510 11520 12620 13630. A chance of showers
early this evening and Thursday morning. Waves 2 to 5 feet.

Superior North Central 12410 12510 12620 12630. A chance of
showers Thursday afternoon. Waves 2 to 5 feet.

Superior South Central 11310 11410 11400 11510 11610 12620 11630.
A chance of showers this evening and Thursday afternoon. Waves 1
to 2 feet tonight building to 2 to 4 feet Thursday.

Superior East 11500 11310 11410 11400 11500 13610. A chance of
showers tonight. Waves 1 to 4 feet.

$$

JSS

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

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