Arctic air will bring very cold temperatures and dangerous wind chills from the Northern Plains to the Ohio Valley today, expanding into the Mid-South and Mid-Atlantic on Sunday. A swath of accumulating snow is expected today from the Midwest to Central Appalachians, expanding into portions of the Mid-Atlantic tonight into Sunday. Read More >
FZUS63 KMQT 132115
GLFLS
Experimental Tabular Open Lake Forecast for Lake Superior
National Weather Service Negaunee MI
415 PM EST Sat Dec 13 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...Ridging builds to 30.4 inches over Lake Superior tonight into Sunday
morning as a 29.7 inch low departs into Quebec and 30.7 high
pressure shifts east from central Canada and the Northern Plains
into the Upper Midwest. A 29.9 inch trough moves across the lake
Monday morning as the high settles into the Southeastern U.S. A 30.0
inch ridge then crosses Lake Superior Monday night followed by a
trough of at least 29.3 inches Tuesday night as a 29.1 inch low
crosses northern Ontario. Weak ridging of 29.9 inches returns over
Lake Superior on Wednesday before a 29.0 inch Clipper low approaches
on Thursday.
LSZ162-140900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EST Sat Dec 13 2025 /300 PM CST Sat Dec 13 2025/
, HEAVY FREEZING SPRAY WARNING IN EFFECT UNTIL 1 AM EST
/MIDNIGHT CST/ SUNDAY,
.LATE THIS AFTERNOON, Northwest winds to 30 knots with a few
gale force gusts to 35 knots possible. Heavy freezing spray.
Isolated snow showers. Waves 4 to 7 feet occasionally to 9 feet.
.TONIGHT, Northwest winds 20 to 30 knots diminishing to 15 to
25 knots late. Heavy freezing spray in the evening. Isolated snow
showers. Waves subsiding to 2 to 4 feet.
.SUNDAY, Northwest winds 10 to 20 knots backing west by late
morning, then becoming southwest 15 to 25 knots by mid afternoon.
Waves subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY NIGHT, Southwest winds 20 to 30 knots increasing to
30 knots with a few gale force gusts to 35 knots possible by
midnight, then veering west late. Freezing spray. A chance of
snow showers. Waves building to 5 to 9 feet occasionally to
11 feet.
.MONDAY, West winds 15 to 25 knots becoming northwest 5 to
15 knots in the afternoon. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT, Northwest winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. Waves calm to 2 feet.
.TUESDAY, Southwest gales to 35 knots. Waves building to 6 to
9 feet occasionally to 11 feet.
.TUESDAY NIGHT, West gales to 35 knots diminishing to 20 to
30 knots after midnight. Waves subsiding to 2 to 4 feet.
.WEDNESDAY, West winds 10 to 20 knots becoming south gales to
35 knots. Rain and snow showers likely. Waves subsiding to calm
to 2 feet, then building to 6 to 9 feet occasionally to 11 feet.
.THURSDAY, West gales to 40 knots veering northwest. Freezing
spray. A chance of snow showers, possibly mixed with rain. Waves
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to calm to 2 feet.
Note, wave height forecasts are for ice free areas.
LSZ162-140300-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
415 PM EST Sat Dec 13 2025 /315 PM CST Sat Dec 13 2025/
...HEAVY FREEZING SPRAY WARNING IN EFFECT UNTIL 1 AM EST
/MIDNIGHT CST/ SUNDAY...
.Tonight...
Weather.............Mostly cloudy with heavy freezing spray and
isolated snow showers, then mostly cloudy after
midnight.
Sfc winds...........Northwest 20 to 25 knots.
100-ft winds........Northwest to 30 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 10 feet.
.SUNDAY...
Weather.............Partly sunny.
Sfc winds...........Northwest 10 to 15 knots becoming southwest 15
to 20 knots in the afternoon.
100-ft winds........Northwest 15 to 20 knots becoming southwest 20
to 25 knots in the afternoon.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.
.SUNDAY NIGHT...
Weather.............Mostly cloudy with freezing spray, then mostly
cloudy with freezing spray with a chance of
snow showers after midnight.
Sfc winds...........Southwest to 30 knots.
100-ft winds........Southwest gales to 35 knots.
Sig waves...........8 to 12 feet.
Ocnl waves..........Around 13 feet.
.MONDAY...
Weather.............Partly sunny with freezing spray, then partly
sunny in the afternoon.
Sfc winds...........West 10 to 15 knots.
100-ft winds........West 15 to 20 knots.
Sig waves...........6 to 9 feet subsiding to 2 to 4 feet in the
afternoon.
Ocnl waves..........Around 12 feet subsiding to around 5 feet in
the afternoon.
.MONDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Light and variable winds becoming southwest 5
to 10 knots after midnight.
100-ft winds........Light and variable winds becoming southwest 10
to 15 knots after midnight.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...Windy. Slight chance of drizzle. chance of light
freezing drizzle and snow showers. chance of drizzle. South winds
to 30 knots. Waves 8 to 12 feet.
.WEDNESDAY...Chance of light freezing drizzle in the morning.
chance of snow showers in the evening, then rain and snow showers
likely after midnight. West winds 15 to 20 knots. Waves 8 to
12 feet.
.THURSDAY...Windy. Rain and snow showers likely in the morning.
showers in the afternoon. chance of snow showers. Freezing spray.
Southeast gales to 35 knots. Waves 15 to 20 feet.
$$
LSZ263-140300-
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 PM EST Sat Dec 13 2025
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH SUNDAY
MORNING...
.Tonight...
Weather.............Mostly cloudy with heavy freezing spray and
scattered snow showers, then mostly cloudy with
heavy freezing spray and isolated snow showers
after midnight.
Sfc winds...........Northwest to 30 knots.
100-ft winds........Northwest gales to 35 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 12 feet.
.SUNDAY...
Weather.............Partly sunny.
Sfc winds...........West 15 to 20 knots becoming southwest 10 to 15
knots in the afternoon.
100-ft winds........West 20 to 25 knots becoming southwest 15 to 20
knots in the afternoon.
Sig waves...........6 to 9 feet subsiding to 3 to 5 feet in the
afternoon.
Ocnl waves..........Around 10 feet subsiding to around 6 feet in
the afternoon.
.SUNDAY NIGHT...
Weather.............Cloudy with freezing spray with a chance of
snow showers.
Sfc winds...........Southwest to 30 knots.
100-ft winds........Southwest gales to 35 knots.
Sig waves...........8 to 12 feet.
Ocnl waves..........Around 14 feet.
.MONDAY...
Weather.............Mostly cloudy with freezing spray, then partly
sunny in the afternoon.
Sfc winds...........Southwest 20 to 25 knots becoming west 10 to 15
knots in the afternoon.
100-ft winds........Southwest to 30 knots becoming west 15 to 20
knots in the afternoon.
Sig waves...........10 to 14 feet subsiding to 6 to 9 feet in the
afternoon.
Ocnl waves..........Around 16 feet subsiding to around 10 feet in
the afternoon.
.MONDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Northwest 5 to 10 knots becoming southwest
after midnight.
100-ft winds........Northwest 10 to 15 knots becoming southwest
after midnight.
Sig waves...........2 to 4 feet.
Ocnl waves..........Around 5 feet in the evening.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...Windy. Slight chance of drizzle. chance of light
freezing drizzle and snow showers. chance of drizzle. South winds
to 30 knots. Waves 8 to 12 feet.
.WEDNESDAY...Chance of light freezing drizzle in the morning.
chance of snow showers in the evening, then rain and snow showers
likely after midnight. West winds 15 to 20 knots. Waves 8 to
12 feet.
.THURSDAY...Windy. Rain and snow showers likely in the morning.
showers in the afternoon. chance of snow showers. Freezing spray.
Southeast gales to 35 knots. Waves 15 to 20 feet.
$$
LSZ264-140300-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
415 PM EST Sat Dec 13 2025
...GALE WARNING IN EFFECT THROUGH SUNDAY MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH SUNDAY
MORNING...
.Tonight...
Weather.............Mostly cloudy with heavy freezing spray and
numerous snow showers, then mostly cloudy with
heavy freezing spray and scattered snow showers
after midnight.
Sfc winds...........Northwest to 30 knots.
100-ft winds........Northwest gales to 35 knots.
Sig waves...........10 to 14 feet.
Ocnl waves..........Around 17 feet.
.SUNDAY...
Weather.............Partly sunny with freezing spray, then partly
sunny in the afternoon.
Sfc winds...........Northwest 20 to 25 knots decreasing to 10 to 15
knots in the afternoon.
100-ft winds........Northwest to 30 knots decreasing to 15 to 20
knots in the afternoon.
Sig waves...........8 to 12 feet subsiding to 5 to 7 feet in the
afternoon.
Ocnl waves..........Around 14 feet subsiding to around 9 feet in
the afternoon.
.SUNDAY NIGHT...
Weather.............Cloudy with freezing spray with a chance of
snow showers.
Sfc winds...........Southwest to 30 knots.
100-ft winds........Southwest 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.
.MONDAY...
Weather.............Mostly cloudy with freezing spray.
Sfc winds...........Southwest to 30 knots becoming northwest 15 to
20 knots in the afternoon.
100-ft winds........Southwest gales to 35 knots becoming northwest
20 to 25 knots in the afternoon.
Sig waves...........8 to 12 feet.
Ocnl waves..........Around 14 feet.
.MONDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Northwest 10 to 15 knots.
100-ft winds........Northwest 15 to 20 knots.
Sig waves...........4 to 6 feet subsiding to 2 to 4 feet after
midnight.
Ocnl waves..........Around 8 feet subsiding to around 5 feet after
midnight.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...Windy. Slight chance of drizzle. chance of light
freezing drizzle and snow showers. chance of drizzle. South winds
to 30 knots. Waves 8 to 12 feet.
.WEDNESDAY...Chance of light freezing drizzle in the morning.
chance of snow showers in the evening, then rain and snow showers
likely after midnight. West winds 15 to 20 knots. Waves 8 to
12 feet.
.THURSDAY...Windy. Rain and snow showers likely in the morning.
showers in the afternoon. chance of snow showers. Freezing spray.
Southeast gales to 35 knots. Waves 15 to 20 feet.
$$
LSZ265-140300-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
415 PM EST Sat Dec 13 2025
...GALE WARNING IN EFFECT THROUGH SUNDAY MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH SUNDAY
MORNING...
.Tonight...
Weather.............Freezing spray and numerous snow showers, then
mostly cloudy with freezing spray and scattered
snow showers after midnight.
Sfc winds...........Northwest to 30 knots.
100-ft winds........Northwest gales to 35 knots.
Sig waves...........10 to 14 feet.
Ocnl waves..........Around 17 feet.
.SUNDAY...
Weather.............Mostly cloudy with freezing spray and isolated
snow showers, then mostly cloudy in the
afternoon.
Sfc winds...........Northwest 20 to 25 knots.
100-ft winds........Northwest to 30 knots.
Sig waves...........10 to 14 feet subsiding to 6 to 9 feet in the
afternoon.
Ocnl waves..........Around 16 feet subsiding to around 11 feet in
the afternoon.
.SUNDAY NIGHT...
Weather.............Cloudy, then snow showers likely after
midnight.
Sfc winds...........Southwest 10 to 15 knots increasing to 20 to 25
knots after midnight.
100-ft winds........Southwest 15 to 20 knots increasing to 30 knots
after midnight.
Sig waves...........3 to 5 feet building to 5 to 7 feet after
midnight.
Ocnl waves..........Around 6 feet building to around 9 feet after
midnight.
.MONDAY...
Weather.............Mostly cloudy with snow showers likely and
freezing spray, then mostly cloudy with chance
of snow showers in the afternoon.
Sfc winds...........Southwest to 30 knots becoming west 15 to 20
knots in the afternoon.
100-ft winds........Southwest gales to 35 knots becoming west 20 to
25 knots in the afternoon.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 9 feet.
.MONDAY NIGHT...
Weather.............Cloudy.
Sfc winds...........West 10 to 15 knots.
100-ft winds........West 15 to 20 knots.
Sig waves...........3 to 5 feet subsiding to 2 to 4 feet after
midnight.
Ocnl waves..........Around 7 feet in the evening.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...Windy. Slight chance of drizzle. chance of light
freezing drizzle and snow showers. chance of drizzle. South winds
to 30 knots. Waves 8 to 12 feet.
.WEDNESDAY...Chance of light freezing drizzle in the morning.
chance of snow showers in the evening, then rain and snow showers
likely after midnight. West winds 15 to 20 knots. Waves 8 to
12 feet.
.THURSDAY...Windy. Rain and snow showers likely in the morning.
showers in the afternoon. chance of snow showers. Freezing spray.
Southeast gales to 35 knots. Waves 15 to 20 feet.
$$
LSZ266-140300-
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 PM EST Sat Dec 13 2025
...GALE WARNING IN EFFECT THROUGH SUNDAY MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH SUNDAY
MORNING...
.Tonight...
Weather.............Snow showers and heavy freezing spray, then
freezing spray and numerous snow showers after
midnight.
Sfc winds...........Northwest gales to 35 knots.
100-ft winds........Northwest gales to 45 knots.
Sig waves...........14 to 18 feet.
Ocnl waves..........Around 21 feet.
.SUNDAY...
Weather.............Mostly cloudy with freezing spray and scattered
snow showers, then partly sunny with isolated
snow showers in the afternoon.
Sfc winds...........North to 30 knots becoming northwest 15 to 20
knots in the afternoon.
100-ft winds........North gales to 35 knots becoming northwest 20
to 25 knots in the afternoon.
Sig waves...........14 to 18 feet subsiding to 8 to 12 feet in the
afternoon.
Ocnl waves..........Around 22 feet subsiding to around 15 feet in
the afternoon.
.SUNDAY NIGHT...
Weather.............Cloudy, then snow showers likely and freezing
spray after midnight.
Sfc winds...........West 15 to 20 knots increasing to southwest to
30 knots after midnight.
100-ft winds........West 20 to 25 knots increasing to southwest
gales to 35 knots after midnight.
Sig waves...........5 to 7 feet building to 8 to 12 feet after
midnight.
Ocnl waves..........Around 9 feet building to around 14 feet after
midnight.
.MONDAY...
Weather.............Freezing spray with snow showers likely, then
mostly cloudy with chance of snow showers in
the afternoon.
Sfc winds...........Southwest to 30 knots.
100-ft winds........Southwest gales to 35 knots.
Sig waves...........8 to 12 feet.
Ocnl waves..........Around 15 feet.
.MONDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Northwest 15 to 20 knots.
100-ft winds........Northwest 20 to 25 knots.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 10 feet.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...Windy. Slight chance of drizzle. chance of light
freezing drizzle and snow showers. chance of drizzle. South winds
to 30 knots. Waves 8 to 12 feet.
.WEDNESDAY...Chance of light freezing drizzle in the morning.
chance of snow showers in the evening, then rain and snow showers
likely after midnight. West winds 15 to 20 knots. Waves 8 to
12 feet.
.THURSDAY...Windy. Rain and snow showers likely in the morning.
showers in the afternoon. chance of snow showers. Freezing spray.
Southeast gales to 35 knots. Waves 15 to 20 feet.
$$
LSZ267-140300-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
415 PM EST Sat Dec 13 2025
...GALE WARNING IN EFFECT THROUGH SUNDAY MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH SUNDAY
MORNING...
.Tonight...
Weather.............Snow showers and freezing spray, then freezing
spray and numerous snow showers after midnight.
Sfc winds...........Northwest to 30 knots becoming north after
midnight.
100-ft winds........Northwest gales to 35 knots becoming north at
35 knots after midnight.
Sig waves...........12 to 16 feet.
Ocnl waves..........Around 20 feet.
.SUNDAY...
Weather.............Mostly cloudy with freezing spray and scattered
snow showers, then mostly cloudy with isolated
snow showers in the afternoon.
Sfc winds...........North to 30 knots decreasing to 15 to 20 knots
in the afternoon.
100-ft winds........North gales to 35 knots decreasing to 20 to 25
knots in the afternoon.
Sig waves...........10 to 14 feet subsiding to 8 to 12 feet in the
afternoon.
Ocnl waves..........Around 18 feet subsiding to around 13 feet in
the afternoon.
.SUNDAY NIGHT...
Weather.............Mostly cloudy with chance of snow showers, then
cloudy with snow showers and freezing spray
after midnight.
Sfc winds...........West 15 to 20 knots increasing to southwest to
30 knots after midnight.
100-ft winds........West 20 to 25 knots increasing to southwest
gales to 35 knots after midnight.
Sig waves...........5 to 7 feet building to 8 to 12 feet after
midnight.
Ocnl waves..........Around 9 feet building to around 13 feet after
midnight.
.MONDAY...
Weather.............Snow showers and freezing spray, then snow
showers in the afternoon.
Sfc winds...........Southwest to 30 knots.
100-ft winds........Southwest gales to 35 knots.
Sig waves...........8 to 12 feet.
Ocnl waves..........Around 14 feet.
.MONDAY NIGHT...
Weather.............Cloudy.
Sfc winds...........Northwest 15 to 20 knots.
100-ft winds........Northwest 20 to 25 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 10 feet.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...Windy. Slight chance of drizzle. chance of light
freezing drizzle and snow showers. chance of drizzle. South winds
to 30 knots. Waves 8 to 12 feet.
.WEDNESDAY...Chance of light freezing drizzle in the morning.
chance of snow showers in the evening, then rain and snow showers
likely after midnight. West winds 15 to 20 knots. Waves 8 to
12 feet.
.THURSDAY...Windy. Rain and snow showers likely in the morning.
showers in the afternoon. chance of snow showers. Freezing spray.
Southeast gales to 35 knots. Waves 15 to 20 feet.
$$
LSZ261-140300-
MAFOR 1322/
Superior West...HEAVY FREEZING SPRAY WARNING IN EFFECT...11742
19747 11742 11732 11730 12720 11610 11520. Waves 4 to 7 feet
subsiding to 3 to 5 feet tonight. Waves 2 to 4 feet Sunday.
Superior North Central...GALE WARNING IN EFFECT...HEAVY FREEZING
SPRAY WARNING IN EFFECT...12757 12752 19757 11740 11730 11720
11620. Waves 6 to 9 feet building to 7 to 11 feet tonight. Waves
6 to 9 feet subsiding to 2 to 4 feet Sunday.
Superior South Central...GALE WARNING IN EFFECT...HEAVY FREEZING
SPRAY WARNING IN EFFECT...14757 11750 19757 11740 19747 12730.
Waves 7 to 10 feet building to 9 to 13 feet tonight. Waves 10 to
13 feet subsiding to 3 to 6 feet Sunday.
Superior East...GALE WARNING IN EFFECT...HEAVY FREEZING SPRAY
WARNING IN EFFECT...12757 11857 11847 11840 19847 11840 11830
11720. Waves 8 to 12 feet building to 9 to 13 feet tonight. Waves
8 to 11 feet subsiding to 4 to 6 feet Sunday.
$$
Occasional waves will only be displayed when values meet or exceed 5 feet.
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