A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >
FZUS63 KMQT 240915
GLFLS
Experimental Tabular Open Lake Forecast for Lake Superior
National Weather Service Negaunee MI
415 AM EST Wed Dec 24 2025
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 30.4 inch high pressure over the Upper Great Lakes this morning
moves over the Lower Great Lakes this evening, followed by a weak
30.1 inch trough. 30.4 inch ridging briefly builds back over Lake
Superior on Thursday as a 30.5 inch high transits Ontario. Low
pressure of 29.6 inches moves east along the southern end of the
Great Lakes Basin on Friday. A deepening low then lifts over the
Upper Great Lakes Saturday night and Sunday. By Monday, a strong
high pressure of at least 30.6 inches will have set up over the
Plains with the now 29.1 inch low moving to Quebec, yielding a tight
pressure gradient over the Great Lakes.
LSZ162-242100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 AM EST Wed Dec 24 2025 /300 AM CST Wed Dec 24 2025/
.EARLY THIS MORNING, South winds 5 to 15 knots. A slight chance
of snow showers. Waves calm to 2 feet.
.TODAY, South winds 5 to 15 knots becoming southwest 10 to
20 knots by late morning, then becoming west 5 to 15 knots by mid
afternoon. A slight chance of snow showers in the morning. Waves
calm to 2 feet.
.TONIGHT, North winds 5 to 15 knots increasing to 10 to 20 knots
by midnight, then becoming northeast 15 to 25 knots late. Waves
building to 2 to 4 feet.
.THURSDAY, Northeast winds 15 to 25 knots veering east. A chance
of snow showers, possibly mixed with freezing rain in the
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY NIGHT, Southeast winds 15 to 25 knots. Snow showers,
possibly mixed with sleet. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY, South winds 10 to 20 knots becoming southwest 5 to
15 knots in the afternoon. A chance of snow showers, possibly
mixed with rain in the morning. Waves subsiding to calm to
2 feet.
.FRIDAY NIGHT, Southwest winds 5 to 15 knots backing south after
midnight. Waves calm to 2 feet.
.SATURDAY, Southeast winds 10 to 20 knots becoming west 20 to
30 knots. A chance of rain showers. A chance of snow showers.
Waves building to 4 to 7 feet occasionally to 9 feet.
.SUNDAY, West gales to 40 knots veering northwest. Heavy
freezing spray. A chance of snow showers. Waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
Note, wave height forecasts are for ice free areas.
LSZ162-241500-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
415 AM EST Wed Dec 24 2025 /315 AM CST Wed Dec 24 2025/
.Today...
Weather.............Mostly cloudy with a slight chance of snow
showers, then partly sunny in the afternoon.
Sfc winds...........South 5 to 10 knots becoming southwest 10 to 15
knots in the afternoon.
100-ft winds........South 10 to 15 knots becoming southwest 15 to
20 knots in the afternoon.
Sig waves...........2 to 4 feet.
.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........West 10 to 15 knots becoming north 15 to 20
knots after midnight.
100-ft winds........West 15 to 20 knots becoming north 20 to 25
knots after midnight.
Sig waves...........2 to 4 feet building to 3 to 5 feet after
midnight.
Ocnl waves..........Around 7 feet after midnight.
.THURSDAY...
Weather.............Partly sunny, then cloudy with chance of snow
showers and light freezing rain in the
afternoon.
Sfc winds...........Northeast 20 to 25 knots.
100-ft winds........Northeast to 30 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.
.THURSDAY NIGHT...
Weather.............Snow showers and light freezing rain likely,
then snow showers after midnight.
Sfc winds...........Southeast 15 to 20 knots.
100-ft winds........Southeast 20 to 25 knots.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 9 feet.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...Snow showers and slight chance of light freezing rain
in the morning. chance of snow showers in the afternoon, then
slight chance of snow showers. Southeast winds 10 to 15 knots.
Waves 8 to 12 feet.
.SATURDAY...Chance of showers, snow showers and light freezing
rain. East winds 10 to 15 knots. Waves 6 to 9 feet.
.SUNDAY...Windy. Heavy freezing spray. Chance of showers and
light freezing rain in the morning. chance of snow showers. West
gales to 35 knots. Waves 18 to 23 feet.
$$
LSZ263-241500-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
415 AM EST Wed Dec 24 2025
.Today...
Weather.............Mostly cloudy with a slight chance of snow
showers, then mostly cloudy in the afternoon.
Sfc winds...........Southeast 10 to 15 knots becoming southwest in
the afternoon.
100-ft winds........Southeast 15 to 20 knots becoming southwest in
the afternoon.
Sig waves...........2 to 4 feet.
.TONIGHT...
Weather.............Mostly cloudy.
Sfc winds...........West 15 to 20 knots becoming north after
midnight.
100-ft winds........West 20 to 25 knots becoming north after
midnight.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 7 feet.
.THURSDAY...
Weather.............Cloudy, then chance of light freezing rain in
the afternoon.
Sfc winds...........North 15 to 20 knots becoming northeast in the
afternoon.
100-ft winds........North 20 to 25 knots becoming northeast in the
afternoon.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 8 feet.
.THURSDAY NIGHT...
Weather.............Snow showers likely, then snow showers after
midnight.
Sfc winds...........Southeast 20 to 25 knots.
100-ft winds........Southeast to 30 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 12 feet.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...Snow showers and slight chance of light freezing rain
in the morning. chance of snow showers in the afternoon, then
slight chance of snow showers. Southeast winds 10 to 15 knots.
Waves 8 to 12 feet.
.SATURDAY...Chance of showers, snow showers and light freezing
rain. East winds 10 to 15 knots. Waves 6 to 9 feet.
.SUNDAY...Windy. Heavy freezing spray. Chance of showers and
light freezing rain in the morning. chance of snow showers. West
gales to 35 knots. Waves 18 to 23 feet.
$$
LSZ264-241500-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
415 AM EST Wed Dec 24 2025
...GALE WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY
AFTERNOON...
.Today...
Weather.............Mostly cloudy with a slight chance of snow
showers.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.
.TONIGHT...
Weather.............Mostly cloudy, then freezing spray after
midnight.
Sfc winds...........West 15 to 20 knots becoming north 20 to 25
knots after midnight.
100-ft winds........West 20 to 25 knots becoming north to 30 knots
after midnight.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 8 feet.
.THURSDAY...
Weather.............Mostly cloudy with freezing spray, then cloudy
in the afternoon.
Sfc winds...........North 15 to 20 knots becoming northeast in the
afternoon.
100-ft winds........North 20 to 25 knots becoming northeast in the
afternoon.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 8 feet.
.THURSDAY NIGHT...
Weather.............Snow showers likely, then snow showers after
midnight.
Sfc winds...........Southeast to 30 knots.
100-ft winds........Southeast gales to 35 knots.
Sig waves...........6 to 9 feet building to 10 to 14 feet after
midnight.
Ocnl waves..........Around 11 feet building to around 17 feet after
midnight.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...Snow showers and slight chance of light freezing rain
in the morning. chance of snow showers in the afternoon, then
slight chance of snow showers. Southeast winds 10 to 15 knots.
Waves 8 to 12 feet.
.SATURDAY...Chance of showers, snow showers and light freezing
rain. East winds 10 to 15 knots. Waves 6 to 9 feet.
.SUNDAY...Windy. Heavy freezing spray. Chance of showers and
light freezing rain in the morning. chance of snow showers. West
gales to 35 knots. Waves 18 to 23 feet.
$$
LSZ265-241500-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
415 AM EST Wed Dec 24 2025
.Today...
Weather.............Mostly cloudy with a slight chance of snow
showers.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet.
.TONIGHT...
Weather.............Mostly cloudy.
Sfc winds...........West 10 to 15 knots increasing to north 20 to
25 knots after midnight.
100-ft winds........West 15 to 20 knots increasing to north to 30
knots after midnight.
Sig waves...........2 to 4 feet building to 5 to 7 feet after
midnight.
Ocnl waves..........Around 9 feet after midnight.
.THURSDAY...
Weather.............Cloudy.
Sfc winds...........Northeast 15 to 20 knots.
100-ft winds........Northeast 20 to 25 knots.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 9 feet.
.THURSDAY NIGHT...
Weather.............Snow showers likely.
Sfc winds...........Southeast to 30 knots.
100-ft winds........Southeast gales to 35 knots.
Sig waves...........8 to 12 feet.
Ocnl waves..........Around 13 feet.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...Snow showers and slight chance of light freezing rain
in the morning. chance of snow showers in the afternoon, then
slight chance of snow showers. Southeast winds 10 to 15 knots.
Waves 8 to 12 feet.
.SATURDAY...Chance of showers, snow showers and light freezing
rain. East winds 10 to 15 knots. Waves 6 to 9 feet.
.SUNDAY...Windy. Heavy freezing spray. Chance of showers and
light freezing rain in the morning. chance of snow showers. West
gales to 35 knots. Waves 18 to 23 feet.
$$
LSZ266-241500-
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-
415 AM EST Wed Dec 24 2025
...GALE WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY
AFTERNOON...
.Today...
Weather.............Mostly cloudy with a slight chance of snow
showers.
Sfc winds...........South 5 to 10 knots increasing to 15 to 20
knots in the afternoon.
100-ft winds........South 10 to 15 knots increasing to 20 to 25
knots in the afternoon.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.
.TONIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Southwest 15 to 20 knots becoming north 20 to
25 knots after midnight.
100-ft winds........Southwest 20 to 25 knots becoming north to 30
knots after midnight.
Sig waves...........4 to 6 feet building to 6 to 9 feet after
midnight.
Ocnl waves..........Around 7 feet building to around 11 feet after
midnight.
.THURSDAY...
Weather.............Partly sunny with freezing spray, then mostly
cloudy in the afternoon.
Sfc winds...........Northeast 20 to 25 knots.
100-ft winds........Northeast to 30 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 10 feet.
.THURSDAY NIGHT...
Weather.............Cloudy with chance of snow showers, then cloudy
with snow showers and freezing spray after
midnight.
Sfc winds...........Southeast to 30 knots.
100-ft winds........Southeast gales to 35 knots.
Sig waves...........6 to 9 feet building to 10 to 14 feet after
midnight.
Ocnl waves..........Around 11 feet building to around 17 feet after
midnight.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...Snow showers and slight chance of light freezing rain
in the morning. chance of snow showers in the afternoon, then
slight chance of snow showers. Southeast winds 10 to 15 knots.
Waves 8 to 12 feet.
.SATURDAY...Chance of showers, snow showers and light freezing
rain. East winds 10 to 15 knots. Waves 6 to 9 feet.
.SUNDAY...Windy. Heavy freezing spray. Chance of showers and
light freezing rain in the morning. chance of snow showers. West
gales to 35 knots. Waves 18 to 23 feet.
$$
LSZ267-241500-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
415 AM EST Wed Dec 24 2025
...GALE WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY
AFTERNOON...
.Today...
Weather.............Mostly cloudy with a slight chance of snow
showers.
Sfc winds...........East 5 to 10 knots increasing to south 15 to 20
knots in the afternoon.
100-ft winds........East 10 to 15 knots increasing to south 20 to
25 knots in the afternoon.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.
.TONIGHT...
Weather.............Mostly cloudy.
Sfc winds...........South 15 to 20 knots becoming northwest 20 to
25 knots after midnight.
100-ft winds........South 20 to 25 knots becoming northwest to 30
knots after midnight.
Sig waves...........4 to 6 feet building to 6 to 9 feet after
midnight.
Ocnl waves..........Around 7 feet building to around 11 feet after
midnight.
.THURSDAY...
Weather.............Partly sunny with freezing spray, then partly
sunny in the afternoon.
Sfc winds...........North 20 to 25 knots.
100-ft winds........North to 30 knots.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 9 feet.
.THURSDAY NIGHT...
Weather.............Cloudy with chance of snow showers, then cloudy
with snow showers and freezing spray after
midnight.
Sfc winds...........Southeast to 30 knots.
100-ft winds........Southeast gales to 35 knots.
Sig waves...........4 to 6 feet building to 8 to 12 feet after
midnight.
Ocnl waves..........Around 8 feet building to around 13 feet after
midnight.
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...Snow showers and slight chance of light freezing rain
in the morning. chance of snow showers in the afternoon, then
slight chance of snow showers. Southeast winds 10 to 15 knots.
Waves 8 to 12 feet.
.SATURDAY...Chance of showers, snow showers and light freezing
rain. East winds 10 to 15 knots. Waves 6 to 9 feet.
.SUNDAY...Windy. Heavy freezing spray. Chance of showers and
light freezing rain in the morning. chance of snow showers. West
gales to 35 knots. Waves 18 to 23 feet.
$$
LSZ261-241500-
MAFOR 2410/
Superior West 12400 12510 11610 11820 12120. Waves 2 feet or less
today. Waves 1 to 3 feet building to 2 to 4 feet tonight.
Superior North Central 11300 11410 11420 11520 11620 11730 12830.
Waves 1 to 3 feet today. Waves 2 to 4 feet building to 3 to 6
feet tonight.
Superior South Central 11400 11410 11430 11530 11620 11720 12830.
Waves 2 to 4 feet subsiding to 1 to 3 feet, then building to 2 to
4 feet today. Waves 1 to 3 feet building to 4 to 7 feet tonight.
Superior East 11200 11410 11420 11530 11520 11620 11730 11840. A
chance of snow showers this afternoon. Waves 2 to 4 feet building
to 3 to 5 feet today. Waves 3 to 6 feet building to 5 to 7 feet
tonight.
$$
Occasional waves will only be displayed when values meet or exceed 5 feet.
Follow us on X
Follow us on Facebook
Follow us on YouTube
MQT RSS Feed