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000
FZUS63 KMQT 160752
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
352 AM EDT Tue Apr 16 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...A 30.3 inch high over western Hudson Bay is currently
extending a 30.1 inch ridge over Lake Superior. This morning, as
the high sags south to far northern Ontario, the high will build
to 30.4 inches, extending a 30.3 inch ridge over the lake.
Meanwhile, a 29.2 inch low pressure over Nebraska this morning will
track northeast to Wisconsin on Wednesday while weakening to 29.5
inches. The low weakens further to 29.7 inches as it tracks east
across Lower Michigan Wednesday night before merging with another
29.7 inch low pressure over northern Ontario. This low moves into
the eastern James Bay Friday night into Saturday, deepening to
29.3 inches. Meanwhile, a 30.4 inch high pressure ridge builds
southeast into the Northern Plains extending weak 30.0 inch
ridging across the western lake. Ridging over the lake builds to
30.1 inches Saturday.

LSZ162-161600-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
352 AM EDT Tue Apr 16 2024 /252 AM CDT Tue Apr 16 2024/

...GALE WARNING IN EFFECT FROM 2 PM EDT /1 PM CDT/ THIS AFTERNOON
THROUGH WEDNESDAY AFTERNOON...

.EARLY THIS MORNING...East winds 10 to 20 knots. Waves 1 to
3 feet building to 2 to 4 feet.
.TODAY...Northeast winds 15 to 25 knots increasing to gales to
45 knots in the afternoon. A chance of rain showers by mid
afternoon. Waves building to 10 to 14 feet occasionally to 18
feet.
.TONIGHT...East gales to 40 knots. Rain showers. Waves building
to 11 to 15 feet occasionally to 19 feet, then subsiding to 8 to
11 feet occasionally to 14 feet.
.WEDNESDAY...Northeast gales to 35 knots diminishing to 20 to
30 knots in the afternoon. Rain showers. Waves building to 9 to
12 feet occasionally to 15 feet, then subsiding to 7 to 10 feet
occasionally to 13 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 knots backing west
after midnight. Rain showers likely through midnight, then a
slight chance of rain showers after midnight. Waves subsiding to
2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots. Waves subsiding to 1 to
3 feet, then building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots. Waves subsiding to
2 to 4 feet.
.FRIDAY...West winds 20 to 30 knots. A chance of rain showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.SATURDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ263-161600-
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-
352 AM EDT Tue Apr 16 2024

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY
AFTERNOON...

.EARLY THIS MORNING...East winds 10 to 20 knots. Waves calm to
2 feet.
.TODAY...East winds 10 to 20 knots increasing to 20 to 30 knots
with a fe gale force gusts to 35 knots possible. Waves building
to 8 to 11 feet occasionally to 14 feet.
.TONIGHT...East gales to 40 knots. A chance of rain showers
through midnight, then rain showers after midnight. Waves
building to 9 to 12 feet occasionally to 15 feet, then subsiding
to 7 to 10 feet occasionally to 13 feet.
.WEDNESDAY...East gales to 40 knots. A chance of rain showers
through early afternoon, then rain showers by mid afternoon.
Waves building to 12 to 17 feet occasionally to 21 feet, then
subsiding to 10 to 14 feet occasionally to 18 feet.
.WEDNESDAY NIGHT...Northwest winds 20 to 30 knots becoming west
15 to 25 knots after midnight. Rain showers likely through
midnight, then a slight chance of rain showers after midnight.
Waves subsiding to 2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots. Waves building to 3 to
5 feet occasionally to 7 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots. 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 diminishing to 15 to
25 knots. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to 1 to 3 feet.

$$

LSZ264-161600-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
352 AM EDT Tue Apr 16 2024

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY
EVENING...

.EARLY THIS MORNING...Northeast winds 10 to 20 knots. Waves calm
to 2 feet.
.TODAY...East winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. Waves building to 3 to 6 feet occasionally to
8 feet.
.TONIGHT...East winds 20 to 30 knots increasing to gales to
40 knots. A slight chance of rain showers through midnight, then
rain showers after midnight. Waves building to 10 to 14 feet
occasionally to 18 feet.
.WEDNESDAY...East gales to 45 knots. Rain showers. Waves building
to 12 to 17 feet occasionally to 21 feet, then subsiding to 10 to
14 feet occasionally to 18 feet.
.WEDNESDAY NIGHT...East winds 20 to 30 knots becoming west 15 to
25 knots after midnight. Rain showers through midnight, then a
chance of rain showers after midnight. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.THURSDAY...West winds 15 to 25 knots backing southwest by mid
afternoon. Waves 3 to 5 feet occasionally to 7 feet.
.THURSDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. 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 diminishing to 15 to
25 knots. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to 1 to 3 feet.

$$

LSZ265-161600-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
352 AM EDT Tue Apr 16 2024

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY
EVENING...

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...East winds 5 to 15 knots increasing to 20 to 30 knots.
Waves building to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...East winds 20 to 30 knots increasing to gales to
35 knots. A slight chance of rain showers through midnight, then
rain showers after midnight. Waves building to 9 to 12 feet
occasionally to 15 feet.
.WEDNESDAY...East gales to 35 knots. Rain showers. Waves building
to 10 to 14 feet occasionally to 18 feet, then subsiding to 9 to
12 feet occasionally to 15 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots becoming west 15 to
25 knots after midnight. Rain showers likely through midnight,
then a slight chance of rain showers after midnight. Waves
subsiding to 2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves building to 1 to 3 feet.
.FRIDAY...West winds 20 to 30 knots. Waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 20 to 30 knots becoming west 15 to
25 knots. Waves subsiding to calm to 2 feet.

$$

LSZ266-161600-
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-
352 AM EDT Tue Apr 16 2024

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY
EVENING...

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...East winds 5 to 15 knots increasing to 15 to 25 knots in
the afternoon. Waves building to 3 to 5 feet occasionally to
7 feet.
.TONIGHT...East winds 20 to 30 knots increasing to gales to
40 knots. Rain showers after midnight. Waves building to 10 to 14
feet occasionally to 18 feet.
.WEDNESDAY...East gales to 45 knots. Rain showers. Waves building
to 12 to 17 feet occasionally to 21 feet, then subsiding to 10 to
14 feet occasionally to 18 feet.
.WEDNESDAY NIGHT...Southeast gales to 35 knots becoming west
15 to 25 knots after midnight. Rain showers through midnight,
then a chance of rain showers after midnight. Waves subsiding to
2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Waves subsiding to 2 to 4 feet.
.THURSDAY NIGHT...Southwest winds 10 to 20 knots becoming west
15 to 25 knots after midnight. A chance of rain showers. Waves
2 to 4 feet.
.FRIDAY...West winds 15 to 25 knots increasing to gales to
35 knots. Waves building to 4 to 8 feet occasionally to 10 feet.
.SATURDAY...Northwest winds 20 to 30 knots becoming west 15 to
25 knots. Waves subsiding to 1 to 3 feet.

$$

LSZ267-161600-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
352 AM EDT Tue Apr 16 2024

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY
EVENING...

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...East winds 5 to 15 knots backing northeast in the
afternoon, then increasing to 10 to 20 knots late. Waves building
to 1 to 3 feet.
.TONIGHT...East winds 15 to 25 knots increasing to 20 to 30 knots
after midnight, then becoming southeast gales to 40 knots late.
Rain showers after midnight. Waves building to 7 to 10 feet
occasionally to 13 feet.
.WEDNESDAY...Southeast gales to 40 knots. Rain showers. Waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 8 to 11 feet occasionally to 14 feet.
.WEDNESDAY NIGHT...Southeast gales to 40 knots becoming west
15 to 25 knots after midnight. Rain showers. Waves subsiding to
1 to 3 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. A chance of rain showers. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet.
.THURSDAY NIGHT...Southwest winds 10 to 20 knots veering west
after midnight. A chance of rain showers. Waves subsiding to calm
to 2 feet, then building to 1 to 3 feet.
.FRIDAY...West winds 15 to 25 knots increasing to 20 to 30 knots.
A chance of rain showers. Waves building to 4 to 8 feet
occasionally to 10 feet.
.SATURDAY...Northwest winds 20 to 30 knots becoming west 15 to
25 knots. Waves subsiding to 1 to 3 feet.

$$

LSZ261-161600-
MAFOR 1609/
Superior West...GALE WARNING IN EFFECT...11220 11230 11140 12150
11250 12256. Waves 1 to 3 feet building to 8 to 11 feet today.
Waves 10 to 14 feet tonight.

Superior North Central...GALE WARNING IN EFFECT...11120 11220
13230 11240 12250. A chance of rain showers overnight. Waves 2
feet or less building to 2 to 4 feet today. Waves 3 to 5 feet
building to 8 to 12 feet tonight.

Superior South Central...GALE WARNING IN EFFECT...11110 11210
11220 11230 13240 11256. Waves 1 to 4 feet today. Waves 5 to 8
feet building to 6 to 9 feet tonight.

Superior East...GALE WARNING IN EFFECT...12110 11210 11120 11220
12240 11250. A chance of showers overnight. Waves 1 to 2 feet
today building to 5 to 9 feet tonight.

$$

GS

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

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