(1/11)
Latest Great Lakes Marine Forecast by KDTX
Issued 10/27/2026 3:52 AM America/New_York.
Valid through 10/27/2026 12:00 PM America/New_York.
fzus63 kdtx 270752
glflh
expires:202610271600;;790428
open lake forecast for lake huron
national weather service detroit/pontiac mi
352 am edt tue oct 27 2026
for waters beyond five nautical miles off shore on lake huron
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...high pressure, 30.7 inches, will move from southern
manitoba to southern quebec by tuesday evening, weakening to 30.5
inches. low pressure is forecast to move across northern ontario
into quebec on thursday, dragging a cold front across the great
lakes. this front will provide the next chance for light rain.
lhz361-271600-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
352 am edt tue oct 27 2026
.today...east winds 10 to 15 knots. waves 1 to 3 feet building to
2 to 4 feet late in the afternoon.
.tonight...southeast winds 15 to 20 knots decreasing to 10 to
15 knots in the late evening and overnight. waves 2 to 4 feet
subsiding to 1 to 3 feet early in the morning.
.wednesday...south winds 10 to 15 knots becoming southeast 5 to
10 knots in the late morning and afternoon. waves 1 to 3 feet.
.wednesday night...southeast winds 5 to 10 knots becoming south
10 to 15 knots in the late evening and overnight. a chance of
rain after midnight. waves 1 to 3 feet.
.thursday...south winds 15 to 20 knots becoming southwest 10 to
15 knots late in the morning...then veering to the northwest late
in the afternoon. a chance of rain. waves 2 to 4 feet subsiding
to 1 to 3 feet late in the afternoon.
.friday...west winds 10 to 15 knots becoming light and variable.
waves 2 feet or less.
.saturday...east winds 5 to 10 knots veering to the southeast by
midnight. waves 2 feet or less.
$$
(2/11)
Latest Great Lakes Marine Forecast by KDTX
Issued 10/27/2026 3:52 AM America/New_York.
Valid through 10/27/2026 12:00 PM America/New_York.
fzus63 kdtx 270752
glflh
expires:202610271600;;790429
open lake forecast for lake huron
national weather service detroit/pontiac mi
352 am edt tue oct 27 2026
for waters beyond five nautical miles off shore on lake huron
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...high pressure, 30.7 inches, will move from southern
manitoba to southern quebec by tuesday evening, weakening to 30.5
inches. low pressure is forecast to move across northern ontario
into quebec on thursday, dragging a cold front across the great
lakes. this front will provide the next chance for light rain.
lhz362-363-271600-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
352 am edt tue oct 27 2026
.today...east winds 5 to 10 knots increasing to 10 to 15 knots in
the late morning and early afternoon...then decreasing to 5 to
10 knots late in the afternoon. waves 1 to 3 feet.
.tonight...southeast winds 10 to 15 knots veering to the south
early in the morning. waves 1 to 3 feet building to 2 to 4 feet
early in the morning.
.wednesday...south winds 10 to 15 knots. waves 2 to 4 feet.
.wednesday night...south winds 10 to 15 knots. a chance of rain
after midnight. waves 1 to 3 feet building to 2 to 4 feet after
midnight.
.thursday...south winds 15 to 20 knots becoming southwest 10 to
15 knots late in the morning...then veering to the northwest late
in the evening. a chance of rain. waves 3 to 5 feet.
.friday...northwest winds 10 to 15 knots decreasing to 5 to
10 knots in the late morning and early afternoon...then becoming
light and variable early in the evening becoming north 5 to
10 knots by midnight. waves 2 to 4 feet subsiding to 2 feet or
less.
.saturday...north winds 5 to 10 knots veering to the east. waves
2 feet or less.
$$
(3/11)
Latest Great Lakes Marine Forecast by KDTX
Issued 10/27/2026 3:52 AM America/New_York.
Valid through 10/27/2026 12:00 PM America/New_York.
fzus63 kdtx 270752
glflh
expires:202610271600;;790430
open lake forecast for lake huron
national weather service detroit/pontiac mi
352 am edt tue oct 27 2026
for waters beyond five nautical miles off shore on lake huron
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...high pressure, 30.7 inches, will move from southern
manitoba to southern quebec by tuesday evening, weakening to 30.5
inches. low pressure is forecast to move across northern ontario
into quebec on thursday, dragging a cold front across the great
lakes. this front will provide the next chance for light rain.
lhz462>464-271600-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
352 am edt tue oct 27 2026
.today...east winds 10 to 15 knots decreasing to 5 to 10 knots in
the late morning and afternoon. waves 1 to 3 feet.
.tonight...east winds 5 to 10 knots becoming southeast 10 to
15 knots in the late evening and overnight. waves 1 to 3 feet
building to 2 to 4 feet early in the morning.
.wednesday...southeast winds 10 to 15 knots becoming south 5 to
10 knots early in the afternoon. waves 1 to 3 feet.
.wednesday night...south winds 10 to 15 knots. waves 1 to 3 feet.
.thursday...southwest winds 10 to 15 knots veering to the
northwest late in the evening. a chance of rain late in the
morning. waves 2 to 4 feet subsiding to 1 to 3 feet late in the
afternoon.
.friday...northwest winds 10 to 15 knots decreasing to 5 to
10 knots in the late morning and early afternoon...then becoming
light and variable early in the evening becoming east 5 to
10 knots by midnight. waves 2 feet or less.
.saturday...east winds 5 to 10 knots becoming southeast 10 to
15 knots by midnight. waves 2 feet or less.
$$
(4/11)
Latest Great Lakes Marine Forecast by KMKX
Issued 10/27/2026 2:59 AM US/Central.
Valid through 10/27/2026 10:30 AM US/Central.
fzus63 kmkx 270759
glflm
expires:202610271530;;790606
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
259 am cdt tue oct 27 2026
for waters beyond five nautical miles of shore on lake michigan.
waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.
.synopsis...
a large area of high pressure around 30.5 inches slowly tracking
from ontario into new england by late tonight, while weakening low
pressure will move northward across minnesota into canada.
modest to breezy southeast winds today and evening will shift
south late tonight through wednesday. a cold front will then
gradually move across the lake on thursday, with winds shifting
from modest to breezy southwest winds wednesday night to lighter
northwest winds after the passage.
lmz261-362-364-366-563-565-567-868-271530-
lake michigan from seul choix point to rock island passage 5 nm
offshore to mid lake-
lake michigan south of a line from seul choix point to the
mackinac bridge and north of a line from charlevoix mi to south
fox island 5 nm offshore-
lake michigan from charlevoix to point betsie mi 5 nm offshore to
mid lake-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
lake michigan from rock island passage to sturgeon bay wi-
lake michigan from sturgeon bay to two rivers wi 5 nm offshore to
mid lake-
lake michigan from two rivers to sheboygan wi 5 nm offshore to
mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
259 am cdt tue oct 27 2026
sheboygan wi to pentwater mi north...
.today...southeast winds 10 to 20 kt. chance of sprinkles. waves
2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.
.tonight...southeast winds 10 to 20 kt becoming south. waves 3 to
5 ft.
.wednesday...south winds 10 to 20 kt. waves 3 to 5 ft.
.wednesday night...south winds 15 to 25 kt becoming southwest to
30 kt. chance of showers in the evening, then showers overnight.
waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft.
.thursday...southwest winds to 30 kt becoming northwest 10 to
20 kt in the afternoon. chance of showers in the morning. waves
4 to 6 ft occasionally to 8 ft.
.thursday night...northwest winds 10 to 15 kt. waves 1 to 3 ft
subsiding to 1 to 2 ft.
.friday...north winds 5 to 10 kt backing to west. waves 1 to
2 ft.
.saturday...southeast winds 10 to 20 kt. waves 2 to 4 ft.
$$
(5/11)
Latest Great Lakes Marine Forecast by KMKX
Issued 10/27/2026 2:59 AM US/Central.
Valid through 10/27/2026 10:30 AM US/Central.
fzus63 kmkx 270759
glflm
expires:202610271530;;790607
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
259 am cdt tue oct 27 2026
for waters beyond five nautical miles of shore on lake michigan.
waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.
.synopsis...
a large area of high pressure around 30.5 inches slowly tracking
from ontario into new england by late tonight, while weakening low
pressure will move northward across minnesota into canada.
modest to breezy southeast winds today and evening will shift
south late tonight through wednesday. a cold front will then
gradually move across the lake on thursday, with winds shifting
from modest to breezy southwest winds wednesday night to lighter
northwest winds after the passage.
lmz080-669-671-673-675-777-779-870-872-874-876-878-271530-
lake michigan from michigan city in to st. joseph mi 5 nm
offshore to mid lake-
lake michigan from sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from port washington to north point light wi 5 nm
offshore to mid lake-
lake michigan from north point light to wind point wi 5 nm
offshore to mid lake-
lake michigan from wind point wi to winthrop harbor il 5 nm
offshore to mid lake-
lake michigan from winthrop harbor to wilmette harbor il 5 nm
offshore to mid lake-
lake michigan from wilmette harbor il to michigan city in 5 nm
offshore to mid lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
lake michigan from grand haven to whitehall mi 5 nm offshore to
mid lake-
lake michigan from holland to grand haven mi 5 nm offshore to mid
lake-
lake michigan from south haven to holland mi 5 nm offshore to mid
lake-
lake michigan from st. joseph to south haven mi 5 nm offshore to
mid lake-
259 am cdt tue oct 27 2026
sheboygan wi to pentwater mi south...
.today...southeast winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft.
.tonight...southeast winds 10 to 20 kt becoming south. waves 3 to
5 ft.
.wednesday...south winds 10 to 20 kt. waves 2 to 4 ft.
.wednesday night...south winds 10 to 20 kt increasing to 15 to
25 kt. waves 4 to 6 ft occasionally to 8 ft.
.thursday...southwest winds 15 to 25 kt becoming west 10 to
20 kt. chance of showers. waves 4 to 6 ft occasionally to 8 ft.
.thursday night...north winds 5 to 10 kt. waves 2 to 4 ft
subsiding to 1 to 2 ft.
.friday...northeast winds 5 to 10 kt becoming east. waves 1 to
2 ft.
.saturday...southeast winds 10 to 20 kt. chance of showers. waves
2 to 4 ft.
$$
(6/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 10/27/2026 4:01 AM America/New_York.
Valid through 10/27/2026 4:00 PM America/New_York.
fzus63 kmqt 270801
glfls
expires:202610272000;;790638
open lake forecast for lake superior
national weather service marquette mi
400 am edt tue oct 27 2026
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...
30.5 inch high pressure centered over northern ontario this morning
shifts east to the saint lawrence seaway this evening, with 30.4
inch ridging over lake superior weakening to 30.1 inches through
tonight. a developing 29.8 inch colorado low lifts through the
plains on wednesday, eventually moving across lake superior
wednesday night into early thursday morning. high pressure of 30.2
to 30.3 inches returns to the upper great lakes by friday,
strengthening to 30.4 inches over the lower great lakes on saturday
as ridging of 30.1 to 30.2 inches lingers over lake superior through
the weekend.
lsz162-272000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt tue oct 27 2026 /300 am cdt tue oct 27 2026/
.early this morning...east winds 15 to 25 knots. a chance of rain
showers. waves 1 to 3 feet building to 2 to 4 feet.
.today...east winds 15 to 25 knots. rain showers. waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.tonight...southeast winds 10 to 20 knots becoming southwest 5 to
15 knots after midnight. a slight chance of showers. waves
subsiding to calm to 2 feet.
.wednesday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing east late. a chance of
showers by mid afternoon. waves calm to 2 feet.
.wednesday night...east winds 5 to 15 knots becoming northwest
10 to 20 knots after midnight. showers and a slight chance of
thunderstorms through midnight. waves calm to 2 feet.
.thursday...west winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.thursday night...west winds 5 to 15 knots. waves calm to 2 feet.
.friday...west winds less than 10 knots becoming east 5 to
15 knots. waves calm to 2 feet.
.saturday...east winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves calm to 2 feet.
$$
(7/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 10/27/2026 4:01 AM America/New_York.
Valid through 10/27/2026 4:00 PM America/New_York.
fzus63 kmqt 270801
glfls
expires:202610272000;;790639
open lake forecast for lake superior
national weather service marquette mi
400 am edt tue oct 27 2026
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...
30.5 inch high pressure centered over northern ontario this morning
shifts east to the saint lawrence seaway this evening, with 30.4
inch ridging over lake superior weakening to 30.1 inches through
tonight. a developing 29.8 inch colorado low lifts through the
plains on wednesday, eventually moving across lake superior
wednesday night into early thursday morning. high pressure of 30.2
to 30.3 inches returns to the upper great lakes by friday,
strengthening to 30.4 inches over the lower great lakes on saturday
as ridging of 30.1 to 30.2 inches lingers over lake superior through
the weekend.
lsz263-272000-
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-
400 am edt tue oct 27 2026
.early this morning...east winds 5 to 15 knots. a slight chance
of rain showers. waves calm to 2 feet.
.today...southeast winds 10 to 20 knots increasing to 15 to
25 knots late. a chance of rain showers through early afternoon,
then rain showers by mid afternoon. waves building to 2 to
4 feet.
.tonight...southeast winds 10 to 20 knots veering southwest late.
a slight chance of showers. waves 2 to 4 feet.
.wednesday...southwest winds 10 to 20 knots. a chance of showers
by mid afternoon. waves subsiding to calm to 2 feet.
.wednesday night...south winds 10 to 20 knots veering northwest
after midnight. showers and a slight chance of thunderstorms
through midnight, then a slight chance of showers after midnight.
waves building to 1 to 3 feet.
.thursday...west winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet.
.thursday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet.
.friday...west winds 5 to 15 knots backing east. waves calm to
2 feet.
.saturday...southeast winds 5 to 15 knots. a chance of rain
showers. waves calm to 2 feet.
$$
(8/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 10/27/2026 4:01 AM America/New_York.
Valid through 10/27/2026 4:00 PM America/New_York.
fzus63 kmqt 270801
glfls
expires:202610272000;;790640
open lake forecast for lake superior
national weather service marquette mi
400 am edt tue oct 27 2026
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...
30.5 inch high pressure centered over northern ontario this morning
shifts east to the saint lawrence seaway this evening, with 30.4
inch ridging over lake superior weakening to 30.1 inches through
tonight. a developing 29.8 inch colorado low lifts through the
plains on wednesday, eventually moving across lake superior
wednesday night into early thursday morning. high pressure of 30.2
to 30.3 inches returns to the upper great lakes by friday,
strengthening to 30.4 inches over the lower great lakes on saturday
as ridging of 30.1 to 30.2 inches lingers over lake superior through
the weekend.
lsz264-272000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt tue oct 27 2026
.early this morning...east winds 5 to 15 knots. waves calm to
2 feet.
.today...southeast winds 5 to 15 knots increasing to 15 to
25 knots. a slight chance of rain showers through early
afternoon, then rain showers by mid afternoon. waves building to
3 to 5 feet occasionally to 7 feet.
.tonight...southeast winds 15 to 25 knots veering south after
midnight, then becoming southwest 10 to 20 knots late. a chance
of showers. waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 2 to 4 feet.
.wednesday...southwest winds 5 to 15 knots. waves subsiding to
calm to 2 feet.
.wednesday night...south winds 10 to 20 knots veering northwest
after midnight. showers through midnight, then a chance of
showers after midnight. waves building to 1 to 3 feet.
.thursday...west winds 15 to 25 knots. waves building to 3 to
5 feet occasionally to 7 feet.
.thursday night...west winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. waves subsiding to calm to 2 feet.
.friday...west winds 5 to 15 knots backing east. waves calm to
2 feet.
.saturday...southeast winds 5 to 15 knots veering south. a chance
of showers. waves calm to 2 feet.
$$
(9/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 10/27/2026 4:01 AM America/New_York.
Valid through 10/27/2026 4:00 PM America/New_York.
fzus63 kmqt 270801
glfls
expires:202610272000;;790641
open lake forecast for lake superior
national weather service marquette mi
400 am edt tue oct 27 2026
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...
30.5 inch high pressure centered over northern ontario this morning
shifts east to the saint lawrence seaway this evening, with 30.4
inch ridging over lake superior weakening to 30.1 inches through
tonight. a developing 29.8 inch colorado low lifts through the
plains on wednesday, eventually moving across lake superior
wednesday night into early thursday morning. high pressure of 30.2
to 30.3 inches returns to the upper great lakes by friday,
strengthening to 30.4 inches over the lower great lakes on saturday
as ridging of 30.1 to 30.2 inches lingers over lake superior through
the weekend.
lsz265-272000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt tue oct 27 2026
.early this morning...southeast winds 10 to 20 knots. waves calm
to 2 feet.
.today...southeast winds 10 to 20 knots increasing to 20 to
30 knots. a chance of showers. waves building to 3 to 5 feet
occasionally to 7 feet.
.tonight...south winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. a chance of showers through midnight.
waves subsiding to 1 to 3 feet.
.wednesday...south winds 10 to 20 knots becoming west 5 to
15 knots in the afternoon, then backing east late. waves
subsiding to calm to 2 feet.
.wednesday night...south winds 15 to 25 knots becoming west 20 to
30 knots after midnight. a slight chance of thunderstorms through
midnight. showers. waves building to 2 to 4 feet.
.thursday...west winds 20 to 30 knots. waves building to 3 to
5 feet occasionally to 7 feet.
.thursday night...west winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.friday...west winds 5 to 15 knots backing southeast. waves calm
to 2 feet.
.saturday...southeast winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet.
$$
(10/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 10/27/2026 4:01 AM America/New_York.
Valid through 10/27/2026 4:00 PM America/New_York.
fzus63 kmqt 270801
glfls
expires:202610272000;;790642
open lake forecast for lake superior
national weather service marquette mi
400 am edt tue oct 27 2026
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...
30.5 inch high pressure centered over northern ontario this morning
shifts east to the saint lawrence seaway this evening, with 30.4
inch ridging over lake superior weakening to 30.1 inches through
tonight. a developing 29.8 inch colorado low lifts through the
plains on wednesday, eventually moving across lake superior
wednesday night into early thursday morning. high pressure of 30.2
to 30.3 inches returns to the upper great lakes by friday,
strengthening to 30.4 inches over the lower great lakes on saturday
as ridging of 30.1 to 30.2 inches lingers over lake superior through
the weekend.
lsz266-272000-
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-
400 am edt tue oct 27 2026
.early this morning...southeast winds 5 to 15 knots. waves calm
to 2 feet.
.today...southeast winds 10 to 20 knots increasing to 20 to
30 knots. a chance of rain showers. waves building to 3 to 5 feet
occasionally to 7 feet.
.tonight...southeast winds 20 to 30 knots veering south after
midnight, then diminishing to 15 to 25 knots late. a chance of
showers through midnight. waves building to 3 to 6 feet
occasionally to 8 feet.
.wednesday...south winds 15 to 25 knots becoming southwest 10 to
20 knots in the afternoon, then backing south late. waves
subsiding to calm to 2 feet.
.wednesday night...south winds 15 to 25 knots becoming west 20 to
30 knots after midnight. showers. a slight chance of
thunderstorms after midnight. waves building to 3 to 5 feet
occasionally to 7 feet.
.thursday...northwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. waves subsiding to 2 to 4 feet, then
building to 3 to 5 feet occasionally to 7 feet.
.thursday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 2 to 4 feet.
.friday...northwest winds 5 to 15 knots veering east. waves
subsiding to calm to 2 feet.
.saturday...southeast winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet.
$$
(11/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 10/27/2026 4:01 AM America/New_York.
Valid through 10/27/2026 4:00 PM America/New_York.
fzus63 kmqt 270801
glfls
expires:202610272000;;790643
open lake forecast for lake superior
national weather service marquette mi
400 am edt tue oct 27 2026
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...
30.5 inch high pressure centered over northern ontario this morning
shifts east to the saint lawrence seaway this evening, with 30.4
inch ridging over lake superior weakening to 30.1 inches through
tonight. a developing 29.8 inch colorado low lifts through the
plains on wednesday, eventually moving across lake superior
wednesday night into early thursday morning. high pressure of 30.2
to 30.3 inches returns to the upper great lakes by friday,
strengthening to 30.4 inches over the lower great lakes on saturday
as ridging of 30.1 to 30.2 inches lingers over lake superior through
the weekend.
lsz267-272000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt tue oct 27 2026
.early this morning...southeast winds 10 to 20 knots. waves calm
to 2 feet.
.today...southeast winds 10 to 20 knots increasing to 20 to
30 knots. waves building to 3 to 6 feet occasionally to 8 feet.
.tonight...southeast winds 20 to 30 knots veering south after
midnight. a slight chance of showers through midnight. waves
subsiding to 2 to 4 feet.
.wednesday...south winds 15 to 25 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet.
.wednesday night...south winds 15 to 25 knots becoming southwest
20 to 30 knots after midnight. a chance of showers through
midnight, then showers and a slight chance of thunderstorms after
midnight. waves building to 3 to 5 feet occasionally to 7 feet.
.thursday...west winds 20 to 30 knots veering northwest by mid
afternoon. waves building to 3 to 6 feet occasionally to 8 feet.
.thursday night...northwest winds 15 to 25 knots. waves subsiding
to 2 to 4 feet.
.friday...northwest winds 5 to 15 knots. waves subsiding to calm
to 2 feet.
.saturday...southeast winds 10 to 20 knots. waves calm to 2 feet.
$$
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