fzus63 kdtx 051942
glflh 
expires:202604060400;;887697

open lake forecast for lake huron
national weather service detroit/pontiac mi
342 pm 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 marginal 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.


lhz361-362-060400-
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-
342 pm edt sun apr 5 2026

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

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


$$

fzus63 kdtx 051942
glflh 
expires:202604060400;;887698

open lake forecast for lake huron
national weather service detroit/pontiac mi
342 pm 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 marginal 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.


lhz363-462-060400-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
342 pm edt sun apr 5 2026

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


$$

fzus63 kmkx 052047
glflm 
expires:202604060315;;890101

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
347 pm 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...

winds will taper 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.


lmz080-669-671-673-675-777-779-870-872-874-876-878-060315-
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-
347 pm cdt sun apr 5 2026

sheboygan wi to pentwater mi south...

.tonight...southwest winds 10 to 15 kt becoming west 10 to 20 kt
late this evening, then increasing to 15 to 25 kt after midnight
becoming northwest late. chance of rain showers. waves 3 to 5 ft
subsiding to 2 to 4 ft. 
.monday...northwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft building to 4 to 7 ft occasionally to 9 ft. 
.monday night...north winds to 30 kt diminishing to 10 to 20 kt.
chance of snow showers in the evening. waves 6 to 9 ft
occasionally to 12 ft. 
.tuesday...north winds 10 to 15 kt becoming northeast. waves 4 to
7 ft occasionally to 9 ft subsiding to 3 to 5 ft. 
.tuesday night...southeast winds 10 to 15 kt increasing to 15 to
25 kt overnight. waves 1 to 3 ft building to 4 to 6 ft
occasionally to 8 ft. 
.wednesday...south winds to 30 kt increasing to gales to 35 kt.
waves 8 to 11 ft occasionally to 14 ft building to 10 to 14 ft
occasionally to 18 ft. 
.wednesday night...south gales to 40 kt. chance of rain showers.
waves 10 to 14 ft occasionally to 18 ft. 
.thursday...southwest winds to 30 kt diminishing to 15 to 25 kt.
chance of rain showers. waves 8 to 12 ft occasionally to 16 ft
subsiding to 5 to 8 ft occasionally to 10 ft. 
.friday...north winds 10 to 20 kt diminishing to 10 to 15 kt.
chance of rain showers. waves 2 to 4 ft.  

$$

fzus63 kmkx 052047
glflm 
expires:202604060315;;890100

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
347 pm 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...

winds will taper 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.


lmz261-362-364-366-563-565-567-868-060315-
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-
347 pm cdt sun apr 5 2026

sheboygan wi to pentwater mi north...

.tonight...west winds 10 to 20 kt becoming northwest. chance of
rain showers this evening. waves 2 to 4 ft subsiding to 1 to
3 ft. 
.monday...northwest winds 10 to 20 kt becoming north to 30 kt.
slight chance of snow showers in the morning, then chance of snow
showers in the afternoon. waves 3 to 5 ft building to 4 to 7 ft
occasionally to 9 ft. 
.monday night...north winds to 30 kt diminishing to 10 to 20 kt.
freezing spray in the evening. chance of snow showers in the
evening. waves 6 to 9 ft occasionally to 12 ft. 
.tuesday...northwest winds 10 to 15 kt backing to southwest 10 to
20 kt. waves 3 to 5 ft subsiding to 1 to 3 ft. 
.tuesday night...south 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 winds to 30 kt increasing to gales to 35 kt.
chance of rain showers in the morning. waves 8 to 11 ft
occasionally to 14 ft building to 10 to 14 ft occasionally to
18 ft. 
.wednesday night...south gales to 40 kt. rain showers. waves
12 to 16 ft occasionally to 21 ft. 
.thursday...southwest winds to 30 kt diminishing to 15 to 25 kt.
chance of rain showers. waves 8 to 12 ft occasionally to 16 ft
subsiding to 5 to 8 ft occasionally to 10 ft. 
.friday...northwest winds 10 to 15 kt becoming north. waves 2 to
4 ft.  

$$

fzus63 kmqt 052001
glfls 
expires:202604060800;;888147

open lake forecast for lake superior
national weather service marquette mi
400 pm 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 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.



lsz264-060800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 pm edt sun apr 5 2026

...heavy freezing spray warning in effect from monday morning
through monday evening...

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

$$

fzus63 kmqt 052001
glfls 
expires:202604060800;;888148

open lake forecast for lake superior
national weather service marquette mi
400 pm 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 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.



lsz265-060800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 pm edt sun apr 5 2026

...heavy freezing spray warning in effect from monday afternoon
through monday evening...

.late this afternoon...northwest winds 15 to 25 knots. waves 3 to
6 feet occasionally to 8 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 increasing to 30 knots with
a few gale force gusts to 35 knots possible in the afternoon.
heavy freezing spray. a chance of snow showers. waves building to
5 to 8 feet occasionally to 10 feet. 
.monday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. freezing spray through midnight. a
slight chance of snow showers. 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 20 to
30 knots after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.wednesday...south gales to 35 knots backing southeast by mid
afternoon. snow showers likely through early afternoon. rain
showers. waves building to 6 to 9 feet occasionally to 11 feet. 
.wednesday night...south gales to 35 knots veering southwest
after midnight. rain showers likely through midnight. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.thursday...west winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to 1 to 3 feet. 
.friday...west winds 10 to 20 knots becoming south 5 to 15 knots.
waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 052001
glfls 
expires:202604060800;;888149

open lake forecast for lake superior
national weather service marquette mi
400 pm 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 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.



lsz266-060800-
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 pm edt sun apr 5 2026

...heavy freezing spray warning in effect from monday afternoon
through monday evening...

.late this afternoon...northwest winds 15 to 25 knots. waves 4 to
8 feet occasionally to 10 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 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.
heavy 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 late. freezing spray. a 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 40 knots backing southeast by mid
afternoon. snow showers likely through early afternoon, then rain
showers by mid afternoon. waves building to 8 to 11 feet
occasionally to 14 feet. 
.wednesday night...south gales to 40 knots becoming southwest
gales to 35 knots after midnight. rain showers, possibly mixed
with snow through midnight, then a chance of rain showers after
midnight. waves subsiding to 6 to 9 feet occasionally to 11 feet.
.thursday...west winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to 2 to 4 feet. 
.friday...northwest winds 10 to 20 knots becoming south 5 to
15 knots. waves subsiding to calm to 2 feet, then building to
3 to 5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 052001
glfls 
expires:202604060800;;888150

open lake forecast for lake superior
national weather service marquette mi
400 pm 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 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.



lsz267-060800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 pm edt sun apr 5 2026

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

$$

fzus63 kmqt 052001
glfls 
expires:202604060800;;888145

open lake forecast for lake superior
national weather service marquette mi
400 pm 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 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. 

$$

fzus63 kmqt 052001
glfls 
expires:202604060800;;888146

open lake forecast for lake superior
national weather service marquette mi
400 pm 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 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.



lsz263-060800-
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 pm edt sun apr 5 2026

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

$$