Cooler and less humid conditions for most of the eastern third of the nation as high pressure dominates the weather pattern. Otherwise, rather tranquil weather for most of the nation for the end of the weekend into the start of this week. We continue to monitor a developing coastal storm offshore of the Carolinas; Coastal flooding and beach erosion possible along portions of the Mid-Atlantic. Read More >
FZUS63 KMQT 181415
GLFLS
Experimental Tabular Open Lake Forecast for Lake Superior
National Weather Service Negaunee MI
1015 AM EDT Sun Oct 18 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...30.5 inch high pressure will stretch from New England to Texas while
a 29.1 inch low moves into Hudson Bay today, putting Lake Superior
around 30.0 inches between these features. High pressure gradually
strengthens to 30.6 inches over the Canadian Maritimes through
Monday as 30.4 inch ridge extends southwest to the Tennessee Valley.
Meanwhile, 30.2 inch high pressure builds over the Northern Plains
Sunday night and tracks east across Ontario at 30.4 inches on
Monday, strengthening to 30.5 inches over Quebec by Tuesday. As this
occurs, ridging over Lake Superior will strengthen from 30.1 inches
tonight to 30.4 inches Monday night into Tuesday. Ridging then
weakens to 30.1 inches over the lake on Wednesday as a 29.7 inch
trough crosses Hudson Bay.
LSZ162-182000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 AM EDT Sun Oct 18 2026 /901 AM CDT Sun Oct 18 2026/
, GALE WARNING IN EFFECT UNTIL 2 PM EDT /1 PM CDT/ THIS
AFTERNOON,
.REST OF TODAY, Southwest gales to 35 knots. Waves 8 to 11 feet
occasionally to 14 feet subsiding to 5 to 8 feet occasionally to
10 feet.
.TONIGHT, Southwest winds 15 to 25 knots becoming west 5 to
15 knots after midnight, then veering northwest late. Waves
subsiding to calm to 2 feet.
.MONDAY, North winds 5 to 15 knots veering northeast in the
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT, East winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY, East winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT, East winds 5 to 15 knots veering southwest after
midnight. Waves calm to 2 feet.
.WEDNESDAY, Southwest winds 5 to 15 knots backing northeast.
Waves calm to 2 feet.
.THURSDAY, East winds 5 to 15 knots. Waves calm to 2 feet.
LSZ162-182000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1015 AM EDT Sun Oct 18 2026 /915 AM CDT Sun Oct 18 2026/
...GALE WARNING IN EFFECT UNTIL 2 PM EDT /1 PM CDT/ THIS
AFTERNOON...
.This Afternoon...
Weather.............Mostly sunny.
Sfc winds...........Southwest to 30 knots.
100-ft winds........Southwest gales to 35 knots.
Sig waves...........10 to 14 feet.
Ocnl waves..........Around 17 feet.
.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........Southwest 15 to 20 knots becoming west 5 to 10
knots after midnight.
100-ft winds........Southwest 20 to 25 knots becoming west 10 to 15
knots after midnight.
Sig waves...........8 to 12 feet subsiding to 3 to 5 feet after
midnight.
Ocnl waves..........Around 13 feet subsiding to around 6 feet after
midnight.
.MONDAY...
Weather.............Mostly sunny.
Sfc winds...........North 5 to 10 knots.
100-ft winds........North 10 to 15 knots.
Sig waves...........2 to 4 feet.
.MONDAY NIGHT...
Weather.............Mostly clear.
Sfc winds...........Northeast 5 to 10 knots.
100-ft winds........Northeast 10 to 15 knots.
Sig waves...........2 to 4 feet.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...Northeast winds 5 to 10 knots. Waves 3 to 5 feet.
.WEDNESDAY...Southeast winds 5 to 10 knots. Waves 3 to 5 feet.
.THURSDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
$$
LSZ263-182000-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
1015 AM EDT Sun Oct 18 2026
...GALE WARNING IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON...
.This Afternoon...
Weather.............Mostly sunny.
Sfc winds...........Southwest gales to 35 knots decreasing to 30
knots in the afternoon.
100-ft winds........Southwest gales to 45 knots decreasing to 35
knots in the afternoon.
Sig waves...........12 to 16 feet.
Ocnl waves..........Around 19 feet.
.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........Southwest 20 to 25 knots decreasing to 10 to 15
knots after midnight.
100-ft winds........Southwest to 30 knots decreasing to 15 to 20
knots after midnight.
Sig waves...........8 to 12 feet subsiding to 6 to 9 feet after
midnight.
Ocnl waves..........Around 15 feet subsiding to around 10 feet
after midnight.
.MONDAY...
Weather.............Mostly sunny.
Sfc winds...........West 5 to 10 knots becoming north in the
afternoon.
100-ft winds........West 10 to 15 knots becoming north in the
afternoon.
Sig waves...........2 to 4 feet.
.MONDAY NIGHT...
Weather.............Mostly clear.
Sfc winds...........Northeast 10 to 15 knots.
100-ft winds........Northeast 15 to 20 knots.
Sig waves...........1 to 3 feet.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...Northeast winds 5 to 10 knots. Waves 3 to 5 feet.
.WEDNESDAY...Southeast winds 5 to 10 knots. Waves 3 to 5 feet.
.THURSDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
$$
LSZ264-182000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1015 AM EDT Sun Oct 18 2026
...GALE WARNING IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON...
.This Afternoon...
Weather.............Mostly sunny.
Sfc winds...........Southwest gales to 35 knots.
100-ft winds........Southwest gales to 45 knots.
Sig waves...........12 to 16 feet.
Ocnl waves..........Around 19 feet.
.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........Southwest 20 to 25 knots becoming west 10 to 15
knots after midnight.
100-ft winds........Southwest to 30 knots becoming west 15 to 20
knots after midnight.
Sig waves...........10 to 14 feet subsiding to 6 to 9 feet after
midnight.
Ocnl waves..........Around 16 feet subsiding to around 11 feet
after midnight.
.MONDAY...
Weather.............Mostly sunny.
Sfc winds...........West 5 to 10 knots in the morning becoming
light and variable.
100-ft winds........West 10 to 15 knots in the morning becoming
light and variable.
Sig waves...........3 to 5 feet subsiding to 2 to 4 feet in the
afternoon.
Ocnl waves..........Around 6 feet in the morning.
.MONDAY NIGHT...
Weather.............Mostly clear.
Sfc winds...........Light and variable winds becoming east 5 to 10
knots after midnight.
100-ft winds........Light and variable winds becoming east 10 to 15
knots after midnight.
Sig waves...........2 feet or less.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...Northeast winds 5 to 10 knots. Waves 3 to 5 feet.
.WEDNESDAY...Southeast winds 5 to 10 knots. Waves 3 to 5 feet.
.THURSDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
$$
LSZ265-182000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1015 AM EDT Sun Oct 18 2026
...GALE WARNING IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...
.This Afternoon...
Weather.............Sunny.
Sfc winds...........Southwest 20 to 25 knots.
100-ft winds........Southwest to 30 knots.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 9 feet.
.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........Southwest 15 to 20 knots.
100-ft winds........Southwest 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.
.MONDAY...
Weather.............Mostly sunny.
Sfc winds...........West 5 to 10 knots.
100-ft winds........West 10 to 15 knots.
Sig waves...........2 to 4 feet.
.MONDAY NIGHT...
Weather.............Mostly clear.
Sfc winds...........Northeast 5 to 10 knots.
100-ft winds........Northeast 10 to 15 knots.
Sig waves...........2 feet or less.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...Northeast winds 5 to 10 knots. Waves 3 to 5 feet.
.WEDNESDAY...Southeast winds 5 to 10 knots. Waves 3 to 5 feet.
.THURSDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
$$
LSZ266-182000-
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-
1015 AM EDT Sun Oct 18 2026
.This Afternoon...
Weather.............Sunny.
Sfc winds...........Southwest to 30 knots.
100-ft winds........Southwest gales to 35 knots.
Sig waves...........10 to 14 feet.
Ocnl waves..........Around 16 feet.
.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........Southwest 15 to 20 knots.
100-ft winds........Southwest 20 to 25 knots.
Sig waves...........8 to 12 feet.
Ocnl waves..........Around 13 feet.
.MONDAY...
Weather.............Mostly sunny.
Sfc winds...........Southwest 5 to 10 knots becoming northwest in
the afternoon.
100-ft winds........Southwest 10 to 15 knots becoming northwest in
the afternoon.
Sig waves...........3 to 5 feet subsiding to 2 to 4 feet in the
afternoon.
Ocnl waves..........Around 6 feet in the morning.
.MONDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........North 5 to 10 knots.
100-ft winds........North 10 to 15 knots.
Sig waves...........1 to 3 feet.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...Northeast winds 5 to 10 knots. Waves 3 to 5 feet.
.WEDNESDAY...Southeast winds 5 to 10 knots. Waves 3 to 5 feet.
.THURSDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
$$
LSZ267-182000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1015 AM EDT Sun Oct 18 2026
.This Afternoon...
Weather.............Mostly sunny.
Sfc winds...........Southwest to 30 knots.
100-ft winds........Southwest gales to 35 knots.
Sig waves...........8 to 12 feet.
Ocnl waves..........Around 14 feet.
.TONIGHT...
Weather.............Partly cloudy.
Sfc winds...........Southwest 20 to 25 knots.
100-ft winds........Southwest to 30 knots.
Sig waves...........5 to 7 feet.
Ocnl waves..........Around 9 feet.
.MONDAY...
Weather.............Mostly sunny.
Sfc winds...........West 5 to 10 knots becoming northwest in the
afternoon.
100-ft winds........West 10 to 15 knots becoming northwest in the
afternoon.
Sig waves...........3 to 5 feet subsiding to 2 to 4 feet in the
afternoon.
Ocnl waves..........Around 6 feet in the morning.
.MONDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........North 5 to 10 knots.
100-ft winds........North 10 to 15 knots.
Sig waves...........1 to 3 feet.
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...Northeast winds 5 to 10 knots. Waves 3 to 5 feet.
.WEDNESDAY...Southeast winds 5 to 10 knots. Waves 3 to 5 feet.
.THURSDAY...North winds 5 to 10 knots. Waves 2 to 4 feet.
$$
LSZ261-182000-
MAFOR 1815/
Superior West...GALE WARNING IN EFFECT...12550 11540 11530 11620
11610 11700 11800. Waves 6 to 10 feet this afternoon. Waves 4 to
7 feet subsiding to 1 to 2 feet tonight. Waves 2 feet or less
Monday morning.
Superior North Central...GALE WARNING IN EFFECT...13550 11540
11640 11620 11710 11700. Waves 9 to 13 feet this afternoon. Waves
8 to 11 feet subsiding to 3 to 5 feet tonight. Waves 2 to 4 feet
Monday morning.
Superior South Central...GALE WARNING IN EFFECT...11540 11530
11520 12530 11630 11620 11710. Waves 3 to 6 feet subsiding to 2
to 4 feet this afternoon. Waves 2 to 4 feet subsiding to 1 to 3
feet tonight. Waves 1 to 3 feet Monday morning.
Superior East 11550 11540 14530 11620 11700. Waves 6 to 9 feet
this afternoon. Waves 4 to 7 feet subsiding to 3 to 5 feet
tonight. Waves 2 to 4 feet Monday morning.
$$
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