482
FZUS63 KMQT 280754
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
354 AM EDT Fri Mar 28 2025

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 lake becomes sandwiched between a 30.4 inch high
moving over northern Ontario and two low pressure systems around
29.4 inches tracking off the Plains today and Saturday. The
second low lifts northeast over the Great Lakes on Sunday and
Sunday night with 30.2 inch high pressure settling southeast over
the region by late in the day Monday. The ridge builds to 30.4
inches Tuesday while shifting over the Lower Great Lakes.




LSZ162-281600-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
354 AM EDT Fri Mar 28 2025 /254 AM CDT Fri Mar 28 2025/

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

.EARLY THIS MORNING...East winds 15 to 25 knots. A slight chance
of snow. Waves 3 to 6 feet occasionally to 8 feet.
.TODAY...East winds 20 to 30 knots increasing to gales to
35 knots late. A chance of rain, possibly mixed with snow through
early afternoon, then rain likely with pockets of snow and sleet
by mid afternoon. Waves building to 8 to 11 feet occasionally to
14 feet.
.TONIGHT...Northeast gales to 40 knots. Sleet with rain, possibly
mixed with snow and thunderstorms likely through midnight, then a
slight chance of rain, snow and sleet after midnight. Waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 9 to 12 feet occasionally to 15 feet.
.SATURDAY...Northeast gales to 35 knots. A slight chance of snow
showers. Waves subsiding to 5 to 8 feet occasionally to 10 feet.
.SATURDAY NIGHT...Northeast gales to 35 knots. Snow. Waves
building to 8 to 11 feet occasionally to 14 feet.
.SUNDAY...Northeast gales to 35 knots. Snow likely through early
afternoon, then a chance of snow by mid afternoon. Waves
subsiding to 7 to 10 feet occasionally to 13 feet.
.SUNDAY NIGHT...Northeast winds 20 to 30 knots backing north
after midnight. Waves subsiding to 3 to 6 feet occasionally to
8 feet.
.MONDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots becoming east 15 to
25 knots. A chance of snow. Waves building to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ263-281600-
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-
354 AM EDT Fri Mar 28 2025

...GALE WARNING IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH
SUNDAY AFTERNOON...

.EARLY THIS MORNING...East winds 15 to 25 knots. A chance of
snow. Waves 3 to 5 feet occasionally to 7 feet.
.TODAY...East winds 15 to 25 knots increasing to gales to
35 knots. A chance of snow, possibly mixed with rain through
early afternoon, then rain and snow, possibly mixed with sleet by
mid afternoon. Waves building to 7 to 10 feet occasionally to
13 feet.
.TONIGHT...East gales to 40 knots backing northeast after
midnight. Snow, sleet, possibly mixed with rain and thunderstorms
through midnight, then a chance of snow, possibly mixed with rain
and sleet after midnight. Waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 9 to 12 feet
occasionally to 15 feet.
.SATURDAY...Northeast winds 20 to 30 knots. A slight chance of
snow showers. Waves subsiding to 5 to 8 feet occasionally to
10 feet.
.SATURDAY NIGHT...Northeast winds 20 to 30 knots increasing to
gales to 35 knots after midnight. A chance of snow through
midnight, then snow likely after midnight. Waves building to 7 to
10 feet occasionally to 13 feet.
.SUNDAY...Northeast gales to 35 knots. Snow. Waves building to
7 to 11 feet occasionally to 14 feet.
.SUNDAY NIGHT...Northeast winds 20 to 30 knots backing north
after midnight. Waves subsiding to 5 to 8 feet occasionally to
10 feet.
.MONDAY...North winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots. A chance of snow. Waves building to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ264-281600-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
354 AM EDT Fri Mar 28 2025

...GALE WARNING IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH
SUNDAY AFTERNOON...

.EARLY THIS MORNING...Southeast winds 10 to 20 knots. A chance of
snow. Waves calm to 2 feet building to 1 to 3 feet.
.TODAY...Southeast winds 15 to 25 knots becoming east 20 to
30 knots in the afternoon, then increasing to gales to 35 knots
late. A chance of snow through early afternoon, then snow,
possibly mixed with sleet by mid afternoon. Waves building to
7 to 10 feet occasionally to 13 feet.
.TONIGHT...East gales to 35 knots backing northeast late. Snow
through midnight. A slight chance of sleet. A chance of snow
after midnight. Waves building to 7 to 11 feet occasionally to
14 feet.
.SATURDAY...Northeast winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. A slight chance of snow showers
through early afternoon. Waves subsiding to 4 to 7 feet
occasionally to 9 feet.
.SATURDAY NIGHT...Northeast winds 20 to 30 knots veering east
after midnight. A chance of snow. Waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 5 to 8 feet occasionally
to 10 feet.
.SUNDAY...Northeast winds 20 to 30 knots. Snow likely. Waves
building to 7 to 10 feet occasionally to 13 feet.
.SUNDAY NIGHT...Northeast winds 20 to 30 knots backing north
after midnight. Freezing spray. A chance of snow. Waves subsiding
to 5 to 8 feet occasionally to 10 feet.
.MONDAY...North winds 20 to 30 knots diminishing to 10 to
20 knots. Freezing spray. Waves subsiding to 1 to 3 feet.
.TUESDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots. Waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet.

$$

LSZ265-281600-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
354 AM EDT Fri Mar 28 2025

.EARLY THIS MORNING...Southeast winds 15 to 25 knots. A slight
chance of snow. Waves calm to 2 feet building to 1 to 3 feet.
.TODAY...Southeast winds 15 to 25 knots becoming east 20 to
30 knots in the afternoon. A chance of snow, possibly mixed with
freezing rain, rain and sleet through early afternoon, then rain
and snow, possibly mixed with sleet by mid afternoon. Waves
building to 6 to 9 feet occasionally to 11 feet.
.TONIGHT...East winds to 30 knots with a few gale force gusts to
35 knots possible. Sleet, possibly mixed with snow and rain
through midnight, then a chance of snow and sleet, possibly mixed
with rain after midnight. Waves 6 to 9 feet occasionally to
11 feet.
.SATURDAY...Northeast winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. A chance of freezing rain through
early afternoon. A chance of snow showers. Waves subsiding to
3 to 6 feet occasionally to 8 feet.
.SATURDAY NIGHT...East winds 20 to 30 knots increasing to gales
to 35 knots after midnight. A chance of snow through midnight,
then snow after midnight. Waves subsiding to 3 to 5 feet
occasionally to 7 feet, then building to 5 to 8 feet occasionally
to 10 feet.
.SUNDAY...Northeast winds 20 to 30 knots. Snow. Waves 5 to 8 feet
occasionally to 10 feet.
.SUNDAY NIGHT...North gales to 35 knots. A chance of snow.
Freezing spray after midnight. Waves building to 6 to 9 feet
occasionally to 11 feet.
.MONDAY...North winds 20 to 30 knots diminishing to 10 to
20 knots. Freezing spray. Waves subsiding to 1 to 3 feet.
.TUESDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots. A chance of snow. Waves subsiding to calm to 2 feet,
then building to 2 to 4 feet.

$$

LSZ266-281600-
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-
354 AM EDT Fri Mar 28 2025

.EARLY THIS MORNING...Southeast winds 10 to 20 knots. A chance of
snow. Waves calm to 2 feet.
.TODAY...Southeast winds 15 to 25 knots becoming east 20 to
30 knots in the afternoon. A chance of snow, possibly mixed with
freezing rain through early afternoon, then snow, possibly mixed
with rain and sleet by mid afternoon. Waves building to 6 to
9 feet occasionally to 11 feet.
.TONIGHT...East winds to 30 knots with a few gale force gusts to
35 knots possible backing northeast late. Snow, sleet, possibly
mixed with rain and freezing rain through midnight, then a chance
of snow, possibly mixed with freezing rain and sleet after
midnight. Waves building to 6 to 10 feet occasionally to 13 feet.
.SATURDAY...Northeast winds 20 to 30 knots diminishing to 15 to
25 knots late. A slight chance of freezing rain through early
afternoon. A slight chance of snow showers. Waves subsiding to
3 to 6 feet occasionally to 8 feet.
.SATURDAY NIGHT...East winds 20 to 30 knots. A chance of snow
through midnight, then snow after midnight. Waves subsiding to
3 to 5 feet occasionally to 7 feet, then building to 5 to 8 feet
occasionally to 10 feet.
.SUNDAY...East winds 20 to 30 knots backing northeast by mid
afternoon. Snow. Waves 5 to 8 feet occasionally to 10 feet.
.SUNDAY NIGHT...Northeast gales to 35 knots backing north after
midnight. Snow likely through midnight, then a chance of snow
after midnight. Freezing spray after midnight. Waves building to
6 to 9 feet occasionally to 11 feet.
.MONDAY...North gales to 35 knots diminishing to 15 to 25 knots.
Freezing spray. Waves building to 7 to 10 feet occasionally to
13 feet, then subsiding to 2 to 4 feet.
.TUESDAY...Southeast winds 10 to 20 knots. Waves subsiding to
calm to 2 feet, then building to 3 to 5 feet occasionally to
7 feet.

$$

LSZ267-281600-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
354 AM EDT Fri Mar 28 2025

.EARLY THIS MORNING...Southeast winds 10 to 20 knots. A chance of
snow. Waves calm to 2 feet.
.TODAY...Southeast winds 15 to 25 knots becoming east 20 to
30 knots in the afternoon. Snow, possibly mixed with freezing
rain. Rain, possibly mixed with sleet by mid afternoon. Waves
building to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...East winds 20 to 30 knots. Snow and sleet, possibly
mixed with freezing rain through midnight, then a chance of snow
and sleet, possibly mixed with freezing rain after midnight.
Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...East winds 20 to 30 knots becoming northeast 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. A slight chance of freezing rain, snow showers and sleet
through early afternoon. Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...East winds 15 to 25 knots increasing to 20 to
30 knots after midnight. A chance of snow through midnight, then
snow after midnight. Waves building to 3 to 6 feet occasionally
to 8 feet.
.SUNDAY...East winds 20 to 30 knots backing northeast by mid
afternoon. Snow. Waves building to 4 to 7 feet occasionally to
9 feet.
.SUNDAY NIGHT...Northeast winds 20 to 30 knots becoming north
gales to 35 knots after midnight. Snow, possibly mixed with
freezing rain through midnight, then a chance of snow after
midnight. Freezing spray after midnight. Waves building to 5 to
8 feet occasionally to 10 feet.
.MONDAY...North gales to 35 knots diminishing to 15 to 25 knots.
Freezing spray. Waves subsiding to 4 to 8 feet occasionally to
10 feet.
.TUESDAY...East winds 10 to 20 knots veering southeast. Waves
subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ261-281600-
MAFOR 2809/
Superior West...GALE WARNING IN EFFECT...11230 12240 12256 11157
11167 11150. Waves 3 to 6 feet building to 7 to 10 feet today.
Waves 10 to 14 feet tonight.

Superior North Central...GALE WARNING IN EFFECT...11320 11337
11240 11247 14257. Waves 1 to 3 feet building to 5 to 8 feet
today. Waves 7 to 10 feet tonight.

Superior South Central 11320 11330 11230 11246 12247 11257 11240.
A chance of light freezing rain this afternoon. A chance of light
sleet overnight. Waves 2 to 4 feet building to 5 to 8 feet today.
Waves 6 to 9 feet tonight.

Superior East 11320 11327 11230 14247 11247. Waves 2 to 4 feet
building to 4 to 7 feet today. Waves 5 to 8 feet tonight.

$$

LC

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

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