597
FZUS63 KMQT 280155
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
955 PM EDT Sat Apr 27 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...Low pressure of 29.7 inches is currently south of
James Bay, crossing into Quebec by Sunday morning. During tonight
and Sunday, 30.4 inch high pressure will build over northern
Ontario as a 29.6 inch low pressure slowly lifts northeast across
the Central Plains. This low will continue to track northeast,
crossing western Lake Superior late in the day on Monday at 29.7
inches. As the low moves over northern Ontario Monday night, a
weak 29.9 inch ridge will shift east across the Mississippi
Valley. On Tuesday, the ridge will move toward the Appalachians as
the next low pressure of 29.6 inches tracks from the Dakotas to
northern Minnesota. This low will pass just north of Lake Superior
on Wednesday. In its wake, a 29.9 inch ridge will shift east to
the western Great Lakes by Wednesday evening. Overnight Wednesday
into Thursday, a 29.4 inch Colorado Low will weaken to 29.7 inches
as it approaches the Upper Midwest.

LSZ162-281000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
955 PM EDT Sat Apr 27 2024 /855 PM CDT Sat Apr 27 2024/

...GALE WARNING IN EFFECT FROM SUNDAY AFTERNOON THROUGH MONDAY
AFTERNOON...

.REST OF TONIGHT...Northwest winds 10 to 20 knots veering north
after midnight, then becoming northeast 15 to 25 knots late.
Waves calm to 2 feet building to 2 to 4 feet.
.SUNDAY...Northeast winds 20 to 30 knots becoming east gales to
35 knots in the afternoon. A slight chance of rain showers by mid
afternoon. Waves building to 8 to 11 feet occasionally to
14 feet.
.SUNDAY NIGHT...East gales to 40 knots. A chance of rain showers
through midnight, then rain showers after midnight. Waves
building to 10 to 14 feet occasionally to 18 feet.
.MONDAY...Northeast gales to 40 knots. Rain showers. Waves
building to 11 to 15 feet occasionally to 19 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet.
.MONDAY NIGHT...Northeast winds 10 to 20 knots backing west after
midnight. A chance of rain showers through midnight. Waves
subsiding to 1 to 3 feet.
.TUESDAY...Southwest winds 10 to 20 knots becoming east 15 to
25 knots by mid afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots veering southwest
after midnight. Rain showers through midnight. A chance of rain
showers after midnight. Waves building to 1 to 3 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots becoming west 10 to
20 knots. A chance of rain showers. Waves building to 2 to
4 feet, then subsiding to calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots veering north. Waves
building to 1 to 3 feet.

$$

LSZ263-281000-
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-
955 PM EDT Sat Apr 27 2024

...GALE WARNING IN EFFECT FROM SUNDAY EVENING THROUGH MONDAY
AFTERNOON...

.REST OF TONIGHT...Northwest winds 15 to 25 knots veering
northeast late. Waves 1 to 3 feet building to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY...Northeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A slight chance of rain showers by mid
afternoon. Waves building to 7 to 10 feet occasionally to
13 feet.
.SUNDAY NIGHT...East gales to 40 knots. A chance of rain showers
through midnight, then rain showers after midnight. Waves
subsiding to 5 to 8 feet occasionally to 10 feet, then building
to 10 to 14 feet occasionally to 18 feet.
.MONDAY...East gales to 40 knots. Rain showers. A slight chance
of thunderstorms by mid afternoon. Waves subsiding to 7 to
10 feet occasionally to 13 feet.
.MONDAY NIGHT...Southwest winds 20 to 30 knots becoming west
10 to 20 knots after midnight. A chance of rain showers through
midnight. Waves subsiding to 2 to 4 feet.
.TUESDAY...West winds 10 to 20 knots backing southwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...East winds 10 to 20 knots veering south after
midnight. Rain showers. Waves building to 1 to 3 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots becoming west 10 to
20 knots. A chance of rain showers. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.THURSDAY...West winds 5 to 15 knots becoming northeast 10 to
20 knots. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.

$$

LSZ264-281000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
955 PM EDT Sat Apr 27 2024

...GALE WARNING IN EFFECT FROM SUNDAY EVENING THROUGH MONDAY
AFTERNOON...

.REST OF TONIGHT...Northwest winds 15 to 25 knots veering north
after midnight. Waves 3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northeast winds 15 to 25 knots. Waves 3 to 6 feet
occasionally to 8 feet.
.SUNDAY NIGHT...Northeast gales to 35 knots becoming east gales
to 40 knots after midnight. A chance of rain showers through
midnight, then rain showers after midnight. Waves building to
10 to 14 feet occasionally to 18 feet.
.MONDAY...East gales to 40 knots. Rain showers. A slight chance
of thunderstorms by mid afternoon. Waves subsiding to 7 to
10 feet occasionally to 13 feet.
.MONDAY NIGHT...Southeast winds 20 to 30 knots becoming southwest
10 to 20 knots after midnight. A chance of rain showers through
midnight. Waves subsiding to 2 to 4 feet.
.TUESDAY...West winds 10 to 20 knots backing southwest by mid
afternoon. Waves subsiding to 1 to 3 feet.
.TUESDAY NIGHT...Southeast winds 10 to 20 knots. A chance of rain
showers through midnight, then rain showers likely after
midnight. Waves subsiding to calm to 2 feet, then building to
2 to 4 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots becoming west 10 to
20 knots. A chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.
.THURSDAY...West winds 5 to 15 knots becoming north 10 to
20 knots. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.

$$

LSZ265-281000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
955 PM EDT Sat Apr 27 2024

...GALE WARNING IN EFFECT FROM SUNDAY EVENING THROUGH MONDAY
AFTERNOON...

.REST OF TONIGHT...West winds 15 to 25 knots veering north late.
Waves 2 to 4 feet subsiding to 1 to 3 feet, then building to 3 to
6 feet occasionally to 8 feet.
.SUNDAY...Northeast winds 15 to 25 knots. A slight chance of rain
showers by mid afternoon. Waves subsiding to 2 to 4 feet.
.SUNDAY NIGHT...East winds 20 to 30 knots increasing to gales to
35 knots after midnight. A chance of rain showers through
midnight, then rain showers after midnight. Waves building to
8 to 11 feet occasionally to 14 feet.
.MONDAY...East gales to 35 knots diminishing to 15 to 25 knots by
mid afternoon. Rain showers. A slight chance of thunderstorms by
mid afternoon. Waves subsiding to 5 to 8 feet occasionally to
10 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. A chance of rain showers through
midnight. Waves subsiding to 1 to 3 feet.
.TUESDAY...West winds 10 to 20 knots backing east by mid
afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 10 to 20 knots becoming south
15 to 25 knots after midnight. A chance of rain showers through
midnight, then rain showers likely after midnight. Waves building
to 1 to 3 feet.
.WEDNESDAY...West winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of rain showers. Waves subsiding to calm to
2 feet.
.THURSDAY...North winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ266-281000-
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-
955 PM EDT Sat Apr 27 2024

...GALE WARNING IN EFFECT FROM SUNDAY EVENING THROUGH MONDAY
AFTERNOON...

.REST OF TONIGHT...West winds 20 to 30 knots veering north late.
Waves 4 to 8 feet occasionally to 10 feet, then subsiding to 3 to
6 feet occasionally to 8 feet.
.SUNDAY...Northeast winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then increasing to 15 to 25 knots
late. A slight chance of rain showers by mid afternoon. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.SUNDAY NIGHT...Northeast winds 20 to 30 knots becoming east
gales to 35 knots after midnight. A chance of rain showers
through midnight, then rain showers after midnight. Waves
building to 8 to 11 feet occasionally to 14 feet.
.MONDAY...East gales to 40 knots. Rain showers. A slight chance
of thunderstorms by mid afternoon. Waves subsiding to 6 to 9 feet
occasionally to 11 feet.
.MONDAY NIGHT...Southeast winds 20 to 30 knots becoming southwest
10 to 20 knots after midnight. A chance of rain showers. Waves
subsiding to 2 to 4 feet.
.TUESDAY...West winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...Southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. A chance of rain showers through
midnight, then rain showers likely after midnight. Waves building
to 2 to 4 feet.
.WEDNESDAY...West winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of rain showers. Waves subsiding to 1 to
3 feet.
.THURSDAY...West winds 10 to 20 knots veering north. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.

$$

LSZ267-281000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
955 PM EDT Sat Apr 27 2024

.REST OF TONIGHT...West winds 20 to 30 knots becoming north 15 to
25 knots late. Waves 5 to 8 feet occasionally to 10 feet
subsiding to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...North winds 15 to 25 knots veering northeast in the
afternoon. A slight chance of rain showers by mid afternoon.
Waves subsiding to 2 to 4 feet.
.SUNDAY NIGHT...Northeast winds 15 to 25 knots becoming east
20 to 30 knots after midnight, then increasing to 30 knots with a
few gale force gusts to 35 knots possible late. A chance of rain
showers through midnight, then rain showers after midnight. Waves
building to 4 to 7 feet occasionally to 9 feet.
.MONDAY...East winds 20 to 30 knots with a few gale force gusts
to 35 knots possible. Rain showers. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
.MONDAY NIGHT...Southeast winds 20 to 30 knots becoming south
10 to 20 knots after midnight. Rain showers likely through
midnight, then a chance of rain showers after midnight. Waves
subsiding to calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. A chance of rain showers. Waves
building to 1 to 3 feet.
.WEDNESDAY...West winds 15 to 25 knots backing southwest. A
chance of rain showers. Waves 1 to 3 feet.
.THURSDAY...Southwest winds 10 to 20 knots veering north. A
chance of rain showers. Waves subsiding to calm to 2 feet.

$$
LSZ261-281000-
MAFOR 2803/
Superior West...GALE WARNING IN EFFECT...11810 11120 11130 13140
11150 11250. A chance of rain showers Sunday evening. Waves 1 to
4 feet overnight. Waves 3 to 6 feet building to 5 to 9 feet
Sunday and Sunday evening.

Superior North Central 12840 11830 14130 11140. Waves 3 to 6
feet.

Superior South Central 11730 11820 11830 12130 11120 11130 11140.
A chance of rain showers Sunday evening. Waves 3 to 6 feet
overnight. Waves 4 to 7 feet subsiding to 3 to 5 feet Sunday.
Waves 2 to 4 feet building to 4 to 6 feet Sunday evening.

Superior East 11640 11730 11830 14130 11140. A chance of showers
Sunday evening. Waves 5 to 8 feet overnight. Waves 4 to 7 feet
subsiding to 3 to 6 feet Sunday and Sunday evening.

$$

GS

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weather.gov/mqt/glftable

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weather.gov/greatlakes