fzus63 kdtx 301345
glflh 
expires:202604302145;;783972

open lake forecast for lake huron
national weather service detroit/pontiac mi
945 am edt thu apr 30 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...a diffuse low pressure system, 30.00, will very
gradually move across the great lakes through the late week
period. this will bring periods of isolated rain showers and will
generally maintain lighter northwest flow.


lhz361-362-302145-
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-
945 am edt thu apr 30 2026

.rest of today...west winds 10 to 20 knots. waves 1 to 3 feet. 
.tonight...west winds 10 to 15 knots. waves 1 to 3 feet. 
.friday...north winds 5 to 10 knots. waves 1 to 3 feet. 
.friday night...northwest winds 10 to 15 knots. waves 2 to
4 feet. 
.saturday...northwest winds 10 to 15 knots becoming west 5 to
10 knots late in the evening. waves 2 to 4 feet subsiding to 1 to
3 feet. 
.sunday...west winds 5 to 10 knots becoming south 10 to 15 knots.
a chance of showers by midnight. waves 1 to 3 feet building to
2 to 4 feet . 
.monday...southwest winds 10 to 15 knots becoming west 15 to
20 knots. a chance of showers early in the morning. a chance of
showers . waves 3 to 5 feet. 


$$

fzus63 kdtx 301345
glflh 
expires:202604302145;;783973

open lake forecast for lake huron
national weather service detroit/pontiac mi
945 am edt thu apr 30 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...a diffuse low pressure system, 30.00, will very
gradually move across the great lakes through the late week
period. this will bring periods of isolated rain showers and will
generally maintain lighter northwest flow.


lhz363-462>464-302145-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
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-
945 am edt thu apr 30 2026

.rest of today...north winds 5 to 15 knots. waves 2 to 4 feet 
subsiding to 1 to 3 feet late in the afternoon. 
.tonight...north winds 5 to 10 knots backing to the west after
midnight. waves 1 to 3 feet. 
.friday...northwest winds 5 to 10 knots. waves 1 to 3 feet. 
.friday night...north winds 5 to 10 knots becoming northwest
10 to 15 knots after midnight. waves 1 to 3 feet building to 2 to
4 feet after midnight. 
.saturday...northwest winds 10 to 15 knots becoming north 5 to
10 knots late in the morning...then backing to the southwest late
in the evening. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.sunday...west winds 5 to 10 knots becoming southwest 10 to
15 knots. a chance of showers by midnight. waves 1 to 3 feet
building to 3 to 5 feet . 
.monday...southwest winds 10 to 15 knots increasing to 15 to
20 knots . a chance of showers. waves 3 to 5 feet. 


$$

fzus63 kmkx 301411
glflm 
expires:202604302115;;785105

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
911 am cdt thu apr 30 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...

north-northwest winds will continue through the end of the week 
as low pressure around 29.6 inches shifts into the canadian 
maritimes and high pressure builds to around 30.2 inches into the
northern great plains. winds will shift south-southwesterly 
saturday into sunday as the high pressure moves into the ohio 
river valley and low pressure around 29.5 inches forms over the 
hudson bay. winds will briefly veer westerly sunday night into 
monday as a weak cold front crosses lake michigan. showers and a 
few thunderstorms will accompany the front, with severe weather 
not anticipated at this time.

low pressure near 29.3 inches will develop near lake superior  
monday, lifting toward the southern hudson bay and quebec on 
tuesday. progression of the low will bring west-southwesterly
winds monday night through wednesday. a cold front is forecast to
cross the open waters wednesday afternoon, bringing a northwest 
wind shift.


lmz261-362-364-366-563-565-567-868-302115-
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-
911 am cdt thu apr 30 2026

sheboygan wi to pentwater mi north...

.rest of today...northwest winds 10 to 15 kt backing to
southwest. isolated rain showers late this morning, then
scattered rain showers this afternoon. waves 1 to 2 ft. 
.tonight...northwest winds 10 to 15 kt becoming north. isolated
rain showers. waves 1 to 2 ft. 
.friday...north winds 10 to 15 kt becoming northwest 10 to 20 kt.
waves 1 to 3 ft. 
.friday night...north winds 10 to 20 kt diminishing to 10 to
15 kt. waves 1 to 2 ft. 
.saturday...northwest winds 10 to 20 kt backing to southwest.
waves 1 to 2 ft. 
.saturday night...southwest winds 10 to 15 kt. waves 1 to 3 ft. 
.sunday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft. 
.monday...southwest winds 15 to 25 kt increasing to 30 kt. chance
of rain showers. waves 2 to 4 ft building to 4 to 6 ft
occasionally to 8 ft.  

$$

fzus63 kmkx 301411
glflm 
expires:202604302115;;785106

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
911 am cdt thu apr 30 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...

north-northwest winds will continue through the end of the week 
as low pressure around 29.6 inches shifts into the canadian 
maritimes and high pressure builds to around 30.2 inches into the
northern great plains. winds will shift south-southwesterly 
saturday into sunday as the high pressure moves into the ohio 
river valley and low pressure around 29.5 inches forms over the 
hudson bay. winds will briefly veer westerly sunday night into 
monday as a weak cold front crosses lake michigan. showers and a 
few thunderstorms will accompany the front, with severe weather 
not anticipated at this time.

low pressure near 29.3 inches will develop near lake superior  
monday, lifting toward the southern hudson bay and quebec on 
tuesday. progression of the low will bring west-southwesterly
winds monday night through wednesday. a cold front is forecast to
cross the open waters wednesday afternoon, bringing a northwest 
wind shift.


lmz080-669-671-673-675-777-779-870-872-874-876-878-302115-
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-
911 am cdt thu apr 30 2026

sheboygan wi to pentwater mi south...

.rest of today...north winds 10 to 15 kt veering to northeast.
scattered rain showers this afternoon. waves 1 to 2 ft. 
.tonight...east winds 5 to 10 kt backing to north. scattered rain
showers in the evening, then isolated rain showers overnight.
waves 1 to 2 ft. 
.friday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.friday night...north winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 3 ft. 
.saturday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft. 
.saturday night...south winds 10 to 20 kt becoming southwest.
waves 1 to 3 ft. 
.sunday...southwest winds 10 to 20 kt. waves 2 to 4 ft. 
.monday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 3 to 5 ft.  

$$

fzus63 kmqt 301402
glfls 
expires:202604302000;;784358

open lake forecast for lake superior
national weather service marquette mi
1001 am edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches through early 
saturday as a 30.3 inch high slowly shifts east from the canadian 
prairies to northwest ontario and hudson bay. weak troughing of 29.8 
inches moves over the lake saturday night and deepens as low as 29.3 
inches by monday as a stronger low develops over the region.



lsz162-302000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt thu apr 30 2026 /901 am cdt thu apr 30 2026/

.rest of today...north winds 5 to 15 knots backing southwest
late. scattered snow showers, possibly mixed with rain. waves
calm to 2 feet. 
.tonight...west winds 5 to 15 knots veering north after midnight,
then veering northeast late. a slight chance of rain and snow
showers through midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots veering southeast in the
afternoon, then veering south late. waves calm to 2 feet. 
.friday night...south winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.saturday night...south winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots increasing to 10 to 20 knots.
a chance of rain showers. waves calm to 2 feet. 
.monday...northwest winds 10 to 20 knots. a chance of rain
showers. waves building to 1 to 3 feet, then subsiding to calm to
2 feet. 

$$

fzus63 kmqt 301402
glfls 
expires:202604302000;;784359

open lake forecast for lake superior
national weather service marquette mi
1001 am edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches through early 
saturday as a 30.3 inch high slowly shifts east from the canadian 
prairies to northwest ontario and hudson bay. weak troughing of 29.8 
inches moves over the lake saturday night and deepens as low as 29.3 
inches by monday as a stronger low develops over the region.



lsz263-302000-
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-
1001 am edt thu apr 30 2026

.rest of today...north winds 5 to 15 knots becoming west less
than 10 knots late. scattered snow showers. scattered rain
showers by mid afternoon. waves calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots veering north after
midnight. a chance of snow showers, possibly mixed with rain
through midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots backing southwest late. waves
calm to 2 feet. 
.friday night...west winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.saturday night...south winds 5 to 15 knots veering southwest
after midnight. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots. a chance of rain showers.
waves building to 1 to 3 feet. 
.monday...west winds 10 to 20 knots becoming northwest 5 to
15 knots. a chance of rain showers. waves building to 2 to
4 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 301402
glfls 
expires:202604302000;;784360

open lake forecast for lake superior
national weather service marquette mi
1001 am edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches through early 
saturday as a 30.3 inch high slowly shifts east from the canadian 
prairies to northwest ontario and hudson bay. weak troughing of 29.8 
inches moves over the lake saturday night and deepens as low as 29.3 
inches by monday as a stronger low develops over the region.



lsz264-302000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 am edt thu apr 30 2026

.rest of today...north winds 5 to 15 knots backing northwest
late. isolated snow showers. waves calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots veering north after
midnight. a slight chance of rain and snow showers through
midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots backing west late. waves calm
to 2 feet. 
.friday night...west winds 5 to 15 knots veering northwest after
midnight. waves calm to 2 feet. 
.saturday...west winds less than 10 knots becoming southwest 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...south winds 5 to 15 knots. waves calm to
2 feet. 
.sunday...southwest winds 5 to 15 knots veering west. rain
showers likely. waves building to 1 to 3 feet. 
.monday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of rain showers. waves building to 2 to
4 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 301402
glfls 
expires:202604302000;;784361

open lake forecast for lake superior
national weather service marquette mi
1001 am edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches through early 
saturday as a 30.3 inch high slowly shifts east from the canadian 
prairies to northwest ontario and hudson bay. weak troughing of 29.8 
inches moves over the lake saturday night and deepens as low as 29.3 
inches by monday as a stronger low develops over the region.



lsz265-302000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 am edt thu apr 30 2026

.rest of today...north winds 10 to 20 knots. isolated snow
showers. waves calm to 2 feet. 
.tonight...northwest winds 10 to 20 knots veering north late. a
slight chance of snow showers through midnight. waves calm to
2 feet. 
.friday...north winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.friday night...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.saturday...northwest winds 10 to 20 knots backing southeast by
mid afternoon. waves calm to 2 feet. 
.saturday night...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.sunday...southwest winds 10 to 20 knots veering west. a chance
of rain showers. waves calm to 2 feet. 
.monday...northwest winds 15 to 25 knots backing west. a chance
of rain showers. waves building to 2 to 4 feet, then subsiding to
1 to 3 feet. 

$$

fzus63 kmqt 301402
glfls 
expires:202604302000;;784362

open lake forecast for lake superior
national weather service marquette mi
1001 am edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches through early 
saturday as a 30.3 inch high slowly shifts east from the canadian 
prairies to northwest ontario and hudson bay. weak troughing of 29.8 
inches moves over the lake saturday night and deepens as low as 29.3 
inches by monday as a stronger low develops over the region.



lsz266-302000-
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-
1001 am edt thu apr 30 2026

.rest of today...north winds 10 to 20 knots backing northwest
late. isolated snow showers. waves calm to 2 feet. 
.tonight...northwest winds 10 to 20 knots veering north after
midnight. waves building to 1 to 3 feet. 
.friday...north winds 10 to 20 knots backing northwest late.
waves 1 to 3 feet. 
.friday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves 1 to 3 feet. 
.saturday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves subsiding to calm to 2 feet. 
.saturday night...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.sunday...south winds 10 to 20 knots veering west. rain showers
likely. waves building to 1 to 3 feet. 
.monday...northwest winds 15 to 25 knots. a chance of rain
showers. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 301402
glfls 
expires:202604302000;;784363

open lake forecast for lake superior
national weather service marquette mi
1001 am edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches through early 
saturday as a 30.3 inch high slowly shifts east from the canadian 
prairies to northwest ontario and hudson bay. weak troughing of 29.8 
inches moves over the lake saturday night and deepens as low as 29.3 
inches by monday as a stronger low develops over the region.



lsz267-302000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 am edt thu apr 30 2026

.rest of today...north winds 10 to 20 knots backing northwest in
the afternoon. waves calm to 2 feet. 
.tonight...northwest winds 10 to 20 knots veering north after
midnight. waves calm to 2 feet. 
.friday...north winds 10 to 20 knots backing northwest in the
afternoon, then increasing to 15 to 25 knots late. waves building
to 2 to 4 feet. 
.friday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.saturday...northwest winds 10 to 20 knots backing west by mid
afternoon. waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet. 
.sunday...south winds 10 to 20 knots veering west. a chance of
rain showers. waves calm to 2 feet. 
.monday...west winds 10 to 20 knots becoming northwest 15 to
25 knots. rain showers likely, then a chance of rain showers.
waves building to 2 to 4 feet. 

$$