Showers and thunderstorms will accompany a cold front that will move across the eastern third of the country through Sunday. In the wake of this front, cooler temperatures will follow for most areas east of the Rockies. A wet pattern is expected to unfold across most of Florida this week with a persistent onshore flow and increase rip currents. For Hawaii, a return toward more rain the week ahead. Read More >
FZUS63 KMQT 052015
GLFLS
Experimental Tabular Open Lake Forecast for Lake Superior
National Weather Service Negaunee MI
415 PM EDT Sun Apr 5 2026
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 weak 30.0 inch trough passes over the lake tonight into Monday.
Monday afternoon, 30.6 inch high pressure resides over North Dakota
before moving over the Upper Great Lakes Tuesday morning at 30.5
inches. The high builds back to 30.6 inches over the Lower Great
Lakes Tuesday night as a 29.5 inch low organizes along the
Montana/Saskatchewan border. This low moves over the Northwest Angle
Wednesday night before moving north of the lake through Thursday
morning. High pressure of 30.4 inches then moves over the Upper
Great Lakes Friday.
LSZ162-060800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EDT Sun Apr 5 2026 /300 PM CDT Sun Apr 5 2026/
.LATE THIS AFTERNOON, West winds 10 to 20 knots. A chance of
rain showers, possibly mixed with snow. Waves calm to 2 feet.
.TONIGHT, West winds 10 to 20 knots veering northwest after
midnight, then becoming north 15 to 25 knots late. A chance of
snow showers, possibly mixed with rain. Waves building to 2 to
4 feet.
.MONDAY, North winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon, then backing northwest late. A slight
chance of snow showers through early afternoon. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.MONDAY NIGHT, Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.TUESDAY, West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT, Southeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. A chance of snow showers after
midnight. Waves building to 2 to 4 feet.
.WEDNESDAY, Southeast winds 15 to 25 knots becoming east 10 to
20 knots by mid afternoon. Snow showers likely through early
afternoon. Rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY NIGHT, Southwest winds 10 to 20 knots increasing to
20 to 30 knots after midnight. A chance of rain showers. Waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY, West winds 20 to 30 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.FRIDAY, Southwest winds 5 to 15 knots backing south. Waves calm
to 2 feet.
LSZ162-060200-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
415 PM EDT Sun Apr 5 2026 /315 PM CDT Sun Apr 5 2026/
.Tonight...
Weather.............Mostly cloudy with chance of showers, then
mostly cloudy with a slight chance of snow
showers after midnight.
Sfc winds...........West 10 to 15 knots.
100-ft winds........West 15 to 20 knots.
Sig waves...........2 to 4 feet.
.MONDAY...
Weather.............Partly sunny with chance of snow showers, then
partly sunny in the afternoon.
Sfc winds...........North 20 to 25 knots.
100-ft winds........North to 30 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 8 feet.
.MONDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northwest 10 to 15 knots.
100-ft winds........Northwest 15 to 20 knots.
Sig waves...........3 to 5 feet subsiding to 2 to 4 feet after
midnight.
Ocnl waves..........Around 6 feet in the evening.
.TUESDAY...
Weather.............Sunny.
Sfc winds...........West 5 to 10 knots becoming southwest 10 to 15
knots in the afternoon.
100-ft winds........West 10 to 15 knots becoming southwest 15 to 20
knots in the afternoon.
Sig waves...........2 to 4 feet.
.TUESDAY NIGHT...
Weather.............Mostly cloudy, then chance of snow showers
after midnight.
Sfc winds...........Southeast 10 to 15 knots.
100-ft winds........Southeast 15 to 20 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY...Windy. Snow showers likely. Showers. snow showers.
South winds to 30 knots. Waves 10 to 14 feet.
.THURSDAY...South winds 15 to 20 knots. Waves 8 to 12 feet.
.FRIDAY...North winds 5 to 10 knots. Waves 3 to 5 feet.
$$
LSZ263-060200-
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 EDT Sun Apr 5 2026
.Tonight...
Weather.............Mostly cloudy with a slight chance of rain and
snow showers, then mostly cloudy with a slight
chance of snow showers after midnight.
Sfc winds...........West 10 to 15 knots becoming northwest after
midnight.
100-ft winds........West 15 to 20 knots becoming northwest after
midnight.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 5 feet.
.MONDAY...
Weather.............Mostly cloudy with freezing spray with a chance
of snow showers, then partly sunny with
freezing spray and slight chance of 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...........6 to 9 feet.
Ocnl waves..........Around 11 feet.
.MONDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........Northwest 15 to 20 knots.
100-ft winds........Northwest 20 to 25 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.
.TUESDAY...
Weather.............Sunny.
Sfc winds...........West 15 to 20 knots.
100-ft winds........West 20 to 25 knots.
Sig waves...........2 to 4 feet building to 3 to 5 feet in the
afternoon.
Ocnl waves..........Around 6 feet in the afternoon.
.TUESDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Southwest 10 to 15 knots becoming south 15 to
20 knots after midnight.
100-ft winds........Southwest 15 to 20 knots becoming south 20 to
25 knots after midnight.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY...Windy. Snow showers likely. Showers. snow showers.
South winds to 30 knots. Waves 10 to 14 feet.
.THURSDAY...South winds 15 to 20 knots. Waves 8 to 12 feet.
.FRIDAY...North winds 5 to 10 knots. Waves 3 to 5 feet.
$$
LSZ264-060200-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
415 PM EDT Sun Apr 5 2026
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM MONDAY MORNING
THROUGH MONDAY EVENING...
.Tonight...
Weather.............Mostly cloudy with a slight chance of snow
showers, then mostly cloudy with chance of snow
showers after midnight.
Sfc winds...........West 10 to 15 knots.
100-ft winds........West 15 to 20 knots becoming north after
midnight.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
.MONDAY...
Weather.............Mostly cloudy with freezing spray with a chance
of snow showers, then partly sunny with heavy
freezing spray in the afternoon.
Sfc winds...........North to 30 knots.
100-ft winds........North gales to 35 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 11 feet.
.MONDAY NIGHT...
Weather.............Mostly cloudy with freezing spray, then partly
cloudy after midnight.
Sfc winds...........Northwest 15 to 20 knots.
100-ft winds........Northwest 20 to 25 knots.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 9 feet.
.TUESDAY...
Weather.............Mostly sunny.
Sfc winds...........West 15 to 20 knots.
100-ft winds........West 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 5 feet.
.TUESDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........Southwest 10 to 15 knots becoming south 15 to
20 knots after midnight.
100-ft winds........Southwest 15 to 20 knots becoming south 20 to
25 knots after midnight.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY...Windy. Snow showers likely. Showers. snow showers.
South winds to 30 knots. Waves 10 to 14 feet.
.THURSDAY...South winds 15 to 20 knots. Waves 8 to 12 feet.
.FRIDAY...North winds 5 to 10 knots. Waves 3 to 5 feet.
$$
LSZ265-060200-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
415 PM EDT Sun Apr 5 2026
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM MONDAY AFTERNOON
THROUGH MONDAY EVENING...
.Tonight...
Weather.............Mostly cloudy with a slight chance of rain and
snow showers, then mostly cloudy with chance of
snow showers after midnight.
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 in the evening.
.MONDAY...
Weather.............Mostly cloudy with chance of snow showers and
freezing spray, then mostly cloudy with heavy
freezing spray and slight chance of snow
showers in the afternoon.
Sfc winds...........North to 30 knots.
100-ft winds........North gales to 35 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 12 feet.
.MONDAY NIGHT...
Weather.............Mostly cloudy with freezing spray.
Sfc winds...........Northwest 20 to 25 knots.
100-ft winds........Northwest to 30 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 12 feet.
.TUESDAY...
Weather.............Mostly sunny.
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 in the
afternoon.
Ocnl waves..........Around 6 feet subsiding to around 5 feet in the
afternoon.
.TUESDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........South 5 to 10 knots increasing to 15 to 20
knots after midnight.
100-ft winds........South 10 to 15 knots increasing to 20 to 25
knots after midnight.
Sig waves...........2 to 4 feet building to 3 to 5 feet after
midnight.
Ocnl waves..........Around 6 feet after midnight.
.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY...Windy. Snow showers likely. Showers. snow showers.
South winds to 30 knots. Waves 10 to 14 feet.
.THURSDAY...South winds 15 to 20 knots. Waves 8 to 12 feet.
.FRIDAY...North winds 5 to 10 knots. Waves 3 to 5 feet.
$$
LSZ266-060200-
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 EDT Sun Apr 5 2026
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM MONDAY AFTERNOON
THROUGH MONDAY EVENING...
.Tonight...
Weather.............Mostly cloudy, then slight chance of snow
showers after midnight.
Sfc winds...........Northwest 10 to 15 knots.
100-ft winds........Northwest 15 to 20 knots.
Sig waves...........6 to 9 feet subsiding to 4 to 6 feet after
midnight.
Ocnl waves..........Around 12 feet subsiding to around 7 feet after
midnight.
.MONDAY...
Weather.............Mostly cloudy with freezing spray with a chance
of snow showers, then mostly cloudy with heavy
freezing spray and slight chance of snow
showers in the afternoon.
Sfc winds...........North to 30 knots.
100-ft winds........North gales to 35 knots.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 12 feet.
.MONDAY NIGHT...
Weather.............Mostly cloudy with freezing spray.
Sfc winds...........Northwest to 30 knots becoming north 15 to 20
knots after midnight.
100-ft winds........Northwest gales to 35 knots becoming north 20
to 25 knots after midnight.
Sig waves...........8 to 12 feet.
Ocnl waves..........Around 14 feet.
.TUESDAY...
Weather.............Mostly sunny with chance of snow showers, then
mostly sunny in the afternoon.
Sfc winds...........West 15 to 20 knots.
100-ft winds........West 20 to 25 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 8 feet.
.TUESDAY NIGHT...
Weather.............Mostly cloudy.
Sfc winds...........West 10 to 15 knots increasing to south 20 to
25 knots after midnight.
100-ft winds........West 15 to 20 knots increasing to south to 30
knots after midnight.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 7 feet.
.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY...Windy. Snow showers likely. Showers. snow showers.
South winds to 30 knots. Waves 10 to 14 feet.
.THURSDAY...South winds 15 to 20 knots. Waves 8 to 12 feet.
.FRIDAY...North winds 5 to 10 knots. Waves 3 to 5 feet.
$$
LSZ267-060200-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
415 PM EDT Sun Apr 5 2026
.Tonight...
Weather.............Mostly cloudy.
Sfc winds...........Northwest 15 to 20 knots.
100-ft winds........Northwest 20 to 25 knots.
Sig waves...........6 to 9 feet subsiding to 4 to 6 feet after
midnight.
Ocnl waves..........Around 12 feet subsiding to around 7 feet after
midnight.
.MONDAY...
Weather.............Mostly cloudy with chance of snow showers, then
mostly cloudy with freezing spray with a chance
of snow showers in the afternoon.
Sfc winds...........North 15 to 20 knots increasing to 30 knots in
the afternoon.
100-ft winds........North 20 to 25 knots increasing to 35 knot
gales in the afternoon.
Sig waves...........6 to 9 feet.
Ocnl waves..........Around 9 feet.
.MONDAY NIGHT...
Weather.............Mostly cloudy with freezing spray with a chance
of snow showers.
Sfc winds...........Northwest to 30 knots becoming north 15 to 20
knots after midnight.
100-ft winds........Northwest gales to 35 knots becoming north 20
to 25 knots after midnight.
Sig waves...........8 to 12 feet.
Ocnl waves..........Around 13 feet.
.TUESDAY...
Weather.............Mostly cloudy with chance of snow showers, then
mostly sunny in the afternoon.
Sfc winds...........Northwest 15 to 20 knots.
100-ft winds........Northwest 20 to 25 knots.
Sig waves...........4 to 6 feet.
Ocnl waves..........Around 8 feet.
.TUESDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........West 10 to 15 knots becoming south 15 to 20
knots after midnight.
100-ft winds........West 15 to 20 knots becoming south 20 to 25
knots after midnight.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 7 feet.
Wave heights are for ice free areas.
.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY...Windy. Snow showers likely. Showers. snow showers.
South winds to 30 knots. Waves 12 to 16 feet.
.THURSDAY...South winds 15 to 20 knots. Waves 10 to 14 feet.
.FRIDAY...North winds 5 to 10 knots. Waves 3 to 5 feet.
$$
LSZ261-060200-
MAFOR 0521/
Superior West 11620 11610 11710 11720 11830 11840 11830 11720. A
chance of snow showers Monday morning. Waves 1 to 3 feet tonight.
Waves 3 to 6 feet subsiding to 2 to 4 feet Monday.
Superior North Central...HEAVY FREEZING SPRAY WARNING IN EFFECT...
11620 11710 11810 11820 12840 12842. A chance of snow showers
overnight and Monday morning. Waves 2 to 4 feet subsiding to 1 to
3 feet, then building to 2 to 4 feet tonight. Waves 4 to 7 feet
Monday.
Superior South Central...HEAVY FREEZING SPRAY WARNING IN EFFECT...
11730 11720 11710 11810 11830 11841 11850 11852. A chance of snow
showers overnight and Monday. Waves 3 to 6 feet subsiding to 1 to
3 feet tonight. Waves 3 to 5 feet building to 5 to 8 feet Monday.
Superior East...HEAVY FREEZING SPRAY WARNING IN EFFECT...11740
11720 11710 11810 11820 11830 11840 11852. A chance of snow
showers Monday. Waves 5 to 8 feet subsiding to 3 to 5 feet
tonight. Waves 3 to 6 feet building to 4 to 7 feet Monday.
$$
Occasional waves will only be displayed when values meet or exceed 5 feet.
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