fzus63 kdtx 051316
glflh 
expires:202604052130;;873289

open lake forecast for lake huron
national weather service detroit/pontiac mi
916 am edt sun apr 5 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...departing low pressure ushers in a cooler air mass on
gusty westerly wind today with gales forecast across northern
lake huron. a weak clipper system tracks through monday into
early tuesday, followed by high pressure tuesday night. the next
low organizes over the upper midwest wednesday, sending a cold
front through on thursday.


lhz363-462-052130-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
916 am edt sun apr 5 2026

.rest of today...west winds 15 to 20 knots with gusts to around
30 knots. waves 6 to 9 feet. waves occasionally around 12 feet. 
.tonight...northwest winds 15 to 20 knots becoming west 5 to
10 knots. waves 6 to 9 feet subsiding to 3 to 5 feet early in the
morning. waves occasionally around 12 feet. 
.monday...west winds 5 to 10 knots. a chance of snow showers in
the afternoon. waves 2 to 4 feet subsiding to 1 to 3 feet in the
late morning and afternoon. 
.monday night...northwest winds 15 to 20 knots increasing to
20 to 25 knots with gusts to around 30 knots in the late evening
and overnight. a chance of snow showers. waves 5 to 7 feet
building to 8 to 12 feet in the late evening and overnight. waves
occasionally around 15 feet. 
.tuesday...northwest winds 15 to 20 knots decreasing to 5 to
10 knots late in the morning...then backing to the south late in
the afternoon increasing to 10 to 15 knots late in the evening.
waves 6 to 9 feet subsiding to 2 to 4 feet. waves occasionally
around 12 feet. 
.wednesday...south winds 10 to 15 knots increasing to 20 to
25 knots with gusts to 35 knot gales. a chance of. waves 5 to
7 feet building to 8 to 12 feet . waves occasionally around
15 feet. 
.thursday...south winds 20 to 25 knots with gusts to 35 knot
gales becoming southwest 15 to 20 knots early in the evening...
then becoming west 10 to 15 knots by midnight. a chance of rain.
waves 8 to 12 feet subsiding to 3 to 5 feet by midnight. waves
occasionally around 15 feet. 


$$

fzus63 kdtx 051316
glflh 
expires:202604052130;;873288

open lake forecast for lake huron
national weather service detroit/pontiac mi
916 am edt sun apr 5 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...departing low pressure ushers in a cooler air mass on
gusty westerly wind today with gales forecast across northern
lake huron. a weak clipper system tracks through monday into
early tuesday, followed by high pressure tuesday night. the next
low organizes over the upper midwest wednesday, sending a cold
front through on thursday.


lhz361-362-052130-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
916 am edt sun apr 5 2026

...gale warning in effect until 8 pm edt this evening...

.rest of today...west winds 20 to 25 knots with gusts to 35 knot
gales. waves 8 to 12 feet. waves occasionally around 15 feet. 
.tonight...northwest winds 20 to 25 knots with gusts to 35 knot
gales decreasing to 10 to 15 knots. waves 6 to 9 feet subsiding
to 3 to 5 feet early in the morning. waves occasionally around
12 feet. 
.monday...west winds 5 to 10 knots becoming northwest 10 to
15 knots early in the afternoon. a chance of snow showers in the
afternoon. waves 2 to 4 feet subsiding to 1 to 3 feet in the late
morning and early afternoon...then building to 3 to 5 feet early
in the afternoon. 
.monday night...northwest winds 20 to 25 knots with gusts to
around 30 knots becoming north 15 to 20 knots after midnight. a
chance of snow showers in the evening. waves 6 to 9 feet. waves
occasionally around 11 feet. 
.tuesday...northwest winds 10 to 15 knots becoming south 5 to
10 knots late in the afternoon. waves 6 to 9 feet subsiding to
3 to 5 feet late in the morning...then subsiding to 1 to 3 feet
late in the afternoon building to 2 to 4 feet late in the
evening. waves occasionally around 12 feet. 
.wednesday...south winds 10 to 15 knots increasing to 30 knots
with gusts to 35 knot gales. a chance of rain . waves 6 to 9 feet
building to 10 to 14 feet . waves occasionally around 18 feet. 
.thursday...south winds 20 to 25 knots with gusts to around
30 knots becoming southwest 15 to 20 knots until early evening...
then becoming west 10 to 15 knots by midnight. a chance of rain.
waves 10 to 14 feet subsiding to 4 to 6 feet. waves occasionally
around 18 feet. 


$$

fzus63 kmkx 050759
glflm 
expires:202604051515;;861706

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
259 am cdt sun apr 5 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...

29.6 inch low pressure is moving toward the ontario-quebec border
this evening, resulting in continued gusty westerly winds will 
continue through late morning as low pressure of 29.4 inches over
the ontario- quebec border deepens to near 29.2 inches over 
quebec. the potential for a few gale force gusts will continue 
through this morning across the northern third of lake michigan. 
winds will taper this afternoon through tonight as 30.4 inch high
pressure builds into the great plains. 

northwest winds will increase once more during the day monday as a 
small area of 30.0 inch low pressure develops over lake huron. 
a few gale force gusts are possible over the northern half of the
open waters during the afternoon hours, but are expected to be 
isolated and brief enough to preclude the need for any headlines. 
trends will continue to be monitored. winds will decrease monday 
night into tuesday as 30.5 inch high pressure moves over and east 
of the open waters. areas of moderate freezing spray are possible 
over the northern half of the lake monday afternoon and evening.

29.6 inch low pressure will form over the northern great plains
and approach lake michigan tuesday night into wednesday, 
resulting in increasing southerly winds across the waters. winds 
will remain gusty into wednesday night as the low passes near or 
just north of lake superior. gale force gusts will be possible
with this system. winds will taper during the day thursday when 
30.4 inch high pressure is forecast to move from the northern 
great plains toward lake superior. showers and a few thunderstorms
are expected wednesday into thursday, with severe weather 
potential appearing low at this time.


lmz080-669-671-673-675-777-779-870-872-874-876-878-051515-
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 sun apr 5 2026

sheboygan wi to pentwater mi south...

.today...northwest winds to 30 kt becoming west 10 to 20 kt.
waves 7 to 10 ft occasionally to 13 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.tonight...west winds 10 to 15 kt becoming northwest 10 to 20 kt.
chance of rain showers. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.monday...northwest winds 10 to 20 kt increasing to 30 kt. chance
of snow showers in the afternoon. waves 2 to 4 ft building to
5 to 8 ft occasionally to 10 ft. 
.monday night...north winds to 30 kt. waves 8 to 11 ft
occasionally to 14 ft. 
.tuesday...north winds 10 to 20 kt becoming northeast 5 to 10 kt
in the afternoon. waves 5 to 8 ft occasionally to 10 ft subsiding
to 3 to 5 ft. 
.tuesday night...southeast winds 10 to 20 kt increasing to 15 to
25 kt. waves 1 to 3 ft building to 4 to 6 ft occasionally to
8 ft. 
.wednesday...south gales to 35 kt. waves 6 to 9 ft occasionally
to 12 ft building to 8 to 12 ft occasionally to 16 ft. 
.thursday...southwest winds to 30 kt diminishing to 15 to 25 kt.
chance of rain showers. waves 8 to 11 ft occasionally to 14 ft
subsiding to 4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmkx 050759
glflm 
expires:202604051515;;861705

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
259 am cdt sun apr 5 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...

29.6 inch low pressure is moving toward the ontario-quebec border
this evening, resulting in continued gusty westerly winds will 
continue through late morning as low pressure of 29.4 inches over
the ontario- quebec border deepens to near 29.2 inches over 
quebec. the potential for a few gale force gusts will continue 
through this morning across the northern third of lake michigan. 
winds will taper this afternoon through tonight as 30.4 inch high
pressure builds into the great plains. 

northwest winds will increase once more during the day monday as a 
small area of 30.0 inch low pressure develops over lake huron. 
a few gale force gusts are possible over the northern half of the
open waters during the afternoon hours, but are expected to be 
isolated and brief enough to preclude the need for any headlines. 
trends will continue to be monitored. winds will decrease monday 
night into tuesday as 30.5 inch high pressure moves over and east 
of the open waters. areas of moderate freezing spray are possible 
over the northern half of the lake monday afternoon and evening.

29.6 inch low pressure will form over the northern great plains
and approach lake michigan tuesday night into wednesday, 
resulting in increasing southerly winds across the waters. winds 
will remain gusty into wednesday night as the low passes near or 
just north of lake superior. gale force gusts will be possible
with this system. winds will taper during the day thursday when 
30.4 inch high pressure is forecast to move from the northern 
great plains toward lake superior. showers and a few thunderstorms
are expected wednesday into thursday, with severe weather 
potential appearing low at this time.


lmz261-362-364-366-563-565-567-868-051515-
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 sun apr 5 2026

sheboygan wi to pentwater mi north...

.today...west winds to 30 kt becoming northwest 15 to 25 kt.
waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 6 ft
occasionally to 8 ft. 
.tonight...west winds 10 to 20 kt becoming northwest. slight
chance of rain showers in the evening, then chance of snow
showers and slight chance of rain showers overnight. waves 2 to
4 ft subsiding to 1 to 3 ft. 
.monday...northwest winds 10 to 20 kt becoming north to 30 kt.
chance of snow and rain showers in the morning, then chance of
snow showers in the afternoon. waves 3 to 5 ft building to 5 to
8 ft occasionally to 10 ft. 
.monday night...north gales to 35 kt diminishing to 30 kt.
freezing spray in the evening. chance of snow showers in the
evening. waves 8 to 11 ft occasionally to 14 ft. 
.tuesday...northwest winds 10 to 15 kt backing to southwest 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 1 to
3 ft. 
.tuesday night...south winds 10 to 20 kt increasing to 15 to
25 kt. waves 2 to 4 ft building to 4 to 6 ft occasionally to
8 ft. 
.wednesday...south gales to 35 kt. chance of rain and snow
showers. waves 7 to 10 ft occasionally to 13 ft building to 10 to
14 ft occasionally to 18 ft. 
.thursday...southwest gales to 35 kt becoming west 15 to 25 kt.
chance of rain showers. waves 10 to 14 ft occasionally to 18 ft
subsiding to 4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmqt 051401
glfls 
expires:202604052000;;874157

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sun apr 5 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...

a 29.3 inch low over quebec continues departing northeast today. 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.



lsz265-052000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 am edt sun apr 5 2026

.rest of today...northwest winds to 30 knots with a few gale
force gusts to 35 knots possible diminishing to 15 to 25 knots.
waves 7 to 10 feet occasionally to 13 feet subsiding to 2 to
4 feet. 
.tonight...northwest winds 10 to 20 knots veering north after
midnight, then increasing to 15 to 25 knots late. a slight chance
of rain showers through midnight. a chance of snow showers. waves
subsiding to calm to 2 feet, then building to 2 to 4 feet. 
.monday...north winds 20 to 30 knots. freezing spray. snow
showers likely through early afternoon. a slight chance of snow
showers by mid afternoon. waves building to 5 to 8 feet
occasionally to 10 feet. 
.monday night...north winds 20 to 30 knots becoming northwest
15 to 25 knots after midnight. freezing spray through midnight.
waves building to 6 to 9 feet occasionally to 11 feet, then
subsiding to 2 to 4 feet. 
.tuesday...west winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.wednesday...southeast gales to 35 knots veering south. rain
showers likely. waves building to 6 to 9 feet occasionally to
11 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. 
.thursday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 051401
glfls 
expires:202604052000;;874158

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sun apr 5 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...

a 29.3 inch low over quebec continues departing northeast today. 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.



lsz266-052000-
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-
1000 am edt sun apr 5 2026

...gale warning in effect until 11 am edt this morning...

.rest of today...northwest winds to 30 knots with a few gale
force gusts to 35 knots possible diminishing to 15 to 25 knots.
waves 9 to 12 feet occasionally to 15 feet subsiding to 4 to
7 feet occasionally to 9 feet. 
.tonight...northwest winds 10 to 20 knots veering north after
midnight, then increasing to 15 to 25 knots late. a chance of
snow showers. a slight chance of rain showers after midnight.
waves subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.monday...north winds 20 to 30 knots increasing to 30 knots with
a few gale force gusts to 35 knots possible in the afternoon.
freezing spray. a chance of snow showers. waves building to 6 to
9 feet occasionally to 11 feet. 
.monday night...north winds 20 to 30 knots becoming northwest
15 to 25 knots after midnight. freezing spray. a slight chance of
snow showers. waves building to 7 to 10 feet occasionally to
13 feet, then subsiding to 3 to 5 feet occasionally to 7 feet. 
.tuesday...west winds 10 to 20 knots. waves subsiding to 2 to
4 feet. 
.tuesday night...south winds 10 to 20 knots increasing to 20 to
30 knots after midnight. waves subsiding to 1 to 3 feet, then
building to 3 to 6 feet occasionally to 8 feet. 
.wednesday...south gales to 35 knots. a chance of rain and snow
showers. waves building to 8 to 11 feet occasionally to 14 feet,
then subsiding to 6 to 9 feet occasionally to 11 feet. 
.thursday...northwest winds 20 to 30 knots becoming north 15 to
25 knots. waves subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 051401
glfls 
expires:202604052000;;874159

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sun apr 5 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...

a 29.3 inch low over quebec continues departing northeast today. 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.



lsz267-052000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 am edt sun apr 5 2026

.rest of today...northwest winds to 30 knots with a few gale
force gusts to 35 knots possible diminishing to 20 to 30 knots
late. waves 8 to 11 feet occasionally to 14 feet subsiding to
4 to 7 feet occasionally to 9 feet. 
.tonight...northwest winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then veering north late. a chance of
snow showers. waves subsiding to 1 to 3 feet. 
.monday...north winds 15 to 25 knots increasing to 30 knots with
a few gale force gusts to 35 knots possible. a chance of snow
showers. freezing spray by mid afternoon. waves building to 5 to
8 feet occasionally to 10 feet. 
.monday night...north winds 20 to 30 knots diminishing to 10 to
20 knots after midnight. freezing spray. a slight chance of snow
showers. waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet. 
.tuesday...west winds 10 to 20 knots. waves subsiding to 2 to
4 feet, then building to 3 to 5 feet occasionally to 7 feet. 
.tuesday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves subsiding to 1 to 3 feet, then
building to 3 to 5 feet occasionally to 7 feet. 
.wednesday...south gales to 35 knots. rain showers, possibly
mixed with snow. waves building to 6 to 9 feet occasionally to
11 feet. 
.thursday...northwest winds 15 to 25 knots becoming north 10 to
20 knots. waves subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 051401
glfls 
expires:202604052000;;874154

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sun apr 5 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...

a 29.3 inch low over quebec continues departing northeast today. 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.



lsz162-052000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt sun apr 5 2026 /900 am cdt sun apr 5 2026/

.rest of today...northwest winds 10 to 20 knots backing west in
the afternoon. a slight chance of rain and snow showers by mid
afternoon. waves 2 to 4 feet subsiding to 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. 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 becoming south
10 to 20 knots after midnight. a chance of snow showers. waves
building to 1 to 3 feet. 
.wednesday...southeast winds 15 to 25 knots veering west. rain
showers, possibly mixed with snow, then a chance of rain showers.
waves building to 3 to 6 feet occasionally to 8 feet, then
subsiding to 2 to 4 feet. 
.thursday...west winds 15 to 25 knots becoming north 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 051401
glfls 
expires:202604052000;;874155

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sun apr 5 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...

a 29.3 inch low over quebec continues departing northeast today. 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.



lsz263-052000-
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-
1000 am edt sun apr 5 2026

.rest of today...northwest winds 10 to 20 knots backing west in
the afternoon, then diminishing to 5 to 15 knots late. a slight
chance of rain and snow showers by mid afternoon. waves 3 to
6 feet occasionally to 8 feet subsiding to 1 to 3 feet. 
.tonight...west winds 5 to 15 knots becoming north 10 to 20 knots
after midnight, then increasing to 15 to 25 knots late. a chance
of snow showers, possibly mixed with rain. waves subsiding to
calm to 2 feet, then building to 3 to 5 feet occasionally to
7 feet. 
.monday...north winds 15 to 25 knots diminishing to 10 to
20 knots late. freezing spray through early afternoon. a chance
of snow showers. waves building to 4 to 7 feet occasionally to
9 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 becoming southwest 10 to
20 knots by mid afternoon. waves building to 2 to 4 feet. 
.tuesday night...south winds 10 to 20 knots. waves subsiding to
1 to 3 feet, then building to 2 to 4 feet. 
.wednesday...southeast winds 15 to 25 knots becoming west 20 to
30 knots. rain showers, possibly mixed with snow. waves building
to 5 to 8 feet occasionally to 10 feet, then subsiding to 3 to
6 feet occasionally to 8 feet. 
.thursday...west winds 20 to 30 knots becoming north 10 to
20 knots. waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 051401
glfls 
expires:202604052000;;874156

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sun apr 5 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...

a 29.3 inch low over quebec continues departing northeast today. 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.



lsz264-052000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 am edt sun apr 5 2026

.rest of today...north winds 15 to 25 knots backing northwest in
the afternoon, then becoming west 10 to 20 knots late. a slight
chance of snow showers by mid afternoon. waves 5 to 8 feet
occasionally to 10 feet subsiding to 2 to 4 feet. 
.tonight...northwest winds 5 to 15 knots becoming north 10 to
20 knots after midnight, then increasing to 15 to 25 knots late.
a chance of snow showers, possibly mixed with rain. waves
subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.monday...north winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. a chance of snow showers through early
afternoon. freezing spray. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.monday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. freezing spray through midnight.
waves subsiding to 1 to 3 feet. 
.tuesday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves building to 2 to 4 feet. 
.tuesday night...south winds 10 to 20 knots. waves subsiding to
1 to 3 feet, then building to 2 to 4 feet. 
.wednesday...southeast winds 20 to 30 knots becoming west gales
to 35 knots. rain showers. waves building to 8 to 11 feet
occasionally to 14 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.thursday...west winds 20 to 30 knots becoming north 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$