fzus63 kdtx 301948
glflh 
expires:202605010400;;798655

open lake forecast for lake huron
national weather service detroit/pontiac mi
348 pm 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>464-010400-
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-
348 pm edt thu apr 30 2026

.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 in the late morning and afternoon. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late morning and afternoon. 
.saturday night...light and variable winds becoming southeast
5 to 10 knots by midnight...then veering to the southwest after
midnight. waves 2 feet or less. 
.sunday...southwest winds 5 to 10 knots increasing to 15 to
20 knots. waves 1 to 3 feet building to 3 to 5 feet late in the
afternoon. 
.monday...southwest winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers. waves 3 to 5 feet. 
.tuesday...west winds 10 to 15 knots backing to the east early in
the evening...then becoming northeast 5 to 10 knots by midnight.
a chance of showers. waves 3 to 5 feet subsiding to 1 to 3 feet
early in the evening...then building to 2 to 4 feet by midnight. 


$$

fzus63 kdtx 301948
glflh 
expires:202605010400;;798654

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


lhz361-362-010400-
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-
348 pm edt thu apr 30 2026

.tonight...west winds 10 to 15 knots. waves 1 to 3 feet. 
.friday...north winds 5 to 10 knots backing to the west late in
the afternoon. 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 in the late morning and afternoon. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late morning and afternoon. 
.saturday night...west winds 5 to 10 knots. waves 1 to 3 feet. 
.sunday...southwest winds 5 to 10 knots increasing to 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet late in the
afternoon. 
.monday...southwest winds 10 to 15 knots becoming south 15 to
20 knots. a chance of showers . waves 3 to 5 feet building to
4 to 6 feet by midnight. waves occasionally around 8 feet. 
.tuesday...west winds 15 to 20 knots decreasing to 10 to 15 knots
until early evening...then veering to the west 10 to 15 knots by
midnight. a chance of showers . waves 3 to 5 feet. 


$$

fzus63 kmkx 301943
glflm 
expires:202605010315;;798582

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

high pressure around 30.2 inches continues to sit over central 
canada through the end of the week and will bring light and 
varying winds across lake michigan through friday. high pressure 
begins to work its way southeastward tracking across lake michigan
overnight friday through the day saturday. will begin to see more
southerly winds develop saturday night and pick up into sunday as
the high pressure continues to track southward while low pressure
around 29.4 inches treks across ontario. this looks to drag a 
cold front week cold front across the lake later sunday turning 
winds more westerly briefly before another low pressure around 
29.1 inches develops right behind it for monday. expecting a 
stronger cold front to move across the lake through the day 
monday and turn winds north-northwesterly overnight into tuesday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-010315-
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-
243 pm cdt thu apr 30 2026

sheboygan wi to pentwater mi south...

.tonight...east winds 10 to 15 kt backing to north. scattered
rain showers this 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 2 to 4 ft. 
.friday night...north winds 10 to 20 kt diminishing to 5 to
10 kt. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.saturday...north winds 10 to 15 kt. waves 1 to 2 ft. 
.saturday night...southwest winds 10 to 15 kt. waves 1 to 2 ft
building to 2 to 4 ft. 
.sunday...southwest winds 10 to 20 kt becoming south. waves 4 to
6 ft occasionally to 8 ft. 
.sunday night...southwest winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.monday...southwest winds 15 to 25 kt increasing to 30 kt. waves
2 to 4 ft building to 3 to 5 ft. 
.tuesday...northwest winds 10 to 15 kt veering to northeast.
chance of rain showers. waves 3 to 5 ft subsiding to 1 to 3 ft.  

$$

fzus63 kmkx 301943
glflm 
expires:202605010315;;798581

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

high pressure around 30.2 inches continues to sit over central 
canada through the end of the week and will bring light and 
varying winds across lake michigan through friday. high pressure 
begins to work its way southeastward tracking across lake michigan
overnight friday through the day saturday. will begin to see more
southerly winds develop saturday night and pick up into sunday as
the high pressure continues to track southward while low pressure
around 29.4 inches treks across ontario. this looks to drag a 
cold front week cold front across the lake later sunday turning 
winds more westerly briefly before another low pressure around 
29.1 inches develops right behind it for monday. expecting a 
stronger cold front to move across the lake through the day 
monday and turn winds north-northwesterly overnight into tuesday.


lmz261-362-364-366-563-565-567-868-010315-
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-
243 pm cdt thu apr 30 2026

sheboygan wi to pentwater mi north...

.tonight...west winds 10 to 15 kt veering to north. isolated rain
showers this evening. waves 1 to 2 ft. 
.friday...north winds 10 to 15 kt becoming northwest. slight
chance of rain showers in the afternoon. waves 1 to 3 ft. 
.friday night...north winds 10 to 20 kt diminishing to 10 to
15 kt. waves 1 to 3 ft. 
.saturday...northwest winds 10 to 15 kt backing to southwest
10 to 20 kt. waves 1 to 2 ft. 
.saturday night...southwest winds 10 to 15 kt. waves 1 to 3 ft
building to 2 to 4 ft. 
.sunday...southwest winds 10 to 20 kt. chance of rain showers in
the morning. waves 4 to 6 ft occasionally to 8 ft. 
.sunday night...southwest winds 15 to 25 kt diminishing to 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft. 
.monday...southwest winds to 30 kt increasing to gales to 35 kt.
chance of rain showers. waves 2 to 4 ft building to 4 to 6 ft
occasionally to 8 ft. 
.tuesday...west winds 10 to 20 kt becoming southwest. waves 1 to
3 ft.  

$$

fzus63 kmqt 302001
glfls 
expires:202605010800;;799068

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



lsz265-010800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt thu apr 30 2026

.late this afternoon...north winds 10 to 20 knots. waves calm to
2 feet. 
.tonight...north winds 10 to 20 knots backing northwest after
midnight, then veering north late. 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 backing west late.
waves calm to 2 feet. 
.saturday...west winds 5 to 15 knots backing east 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 by mid
afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 10 to 20 knots becoming south
15 to 25 knots after midnight. waves calm to 2 feet. 
.monday...west winds 20 to 30 knots. a chance of rain showers.
waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.tuesday...west winds 15 to 25 knots diminishing to 10 to
20 knots. a chance of rain showers. waves subsiding to calm to
2 feet. 

$$

fzus63 kmqt 302001
glfls 
expires:202605010800;;799069

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



lsz266-010800-
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-
401 pm edt thu apr 30 2026

.late this afternoon...northwest winds 10 to 20 knots. 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 late.
waves building to 1 to 3 feet. 
.friday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots late. 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 by mid
afternoon. waves calm to 2 feet. 
.sunday night...west winds 10 to 20 knots becoming south 15 to
25 knots after midnight. waves building to 1 to 3 feet. 
.monday...west winds 20 to 30 knots. a chance of rain showers.
waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet. 
.tuesday...west winds 15 to 25 knots diminishing to 10 to
20 knots. a chance of rain showers. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 

$$

fzus63 kmqt 302001
glfls 
expires:202605010800;;799070

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



lsz267-010800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt thu apr 30 2026

.late this afternoon...northwest winds 10 to 20 knots. waves calm
to 2 feet. 
.tonight...northwest winds 10 to 20 knots veering north after
midnight. a slight chance of snow showers. waves calm to 2 feet. 
.friday...north winds 10 to 20 knots backing northwest late.
waves building to 1 to 3 feet. 
.friday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots late. waves subsiding to calm to 2 feet. 
.saturday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.saturday night...southwest winds 5 to 15 knots backing south
after midnight. waves calm to 2 feet. 
.sunday...south winds 10 to 20 knots veering southwest by mid
afternoon. waves calm to 2 feet. 
.sunday night...west winds 5 to 15 knots becoming south 10 to
20 knots after midnight. waves calm to 2 feet. 
.monday...south winds 20 to 30 knots veering west. a chance of
rain showers. waves building to 2 to 4 feet. 
.tuesday...west winds 15 to 25 knots diminishing to 10 to
20 knots. a chance of rain showers. waves subsiding to calm to
2 feet. 

$$

fzus63 kmqt 302001
glfls 
expires:202605010800;;799065

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



lsz162-010800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt thu apr 30 2026 /301 pm cdt thu apr 30 2026/

.late this afternoon...southwest winds 5 to 15 knots. a slight
chance of rain and snow showers. waves calm to 2 feet. 
.tonight...west 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...northeast winds 5 to 15 knots veering east in the
afternoon, then veering south late. waves calm to 2 feet. 
.friday night...southwest 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 10 to 20 knots. waves calm to 2 feet. 
.sunday night...west winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. waves building to 1 to 3 feet. 
.monday...west winds 15 to 25 knots becoming northwest 10 to
20 knots. a chance of rain showers. waves building to 2 to
4 feet, then subsiding to calm to 2 feet. 
.tuesday...west winds 10 to 20 knots becoming northwest 5 to
15 knots. a chance of rain showers. waves calm to 2 feet. 

$$

fzus63 kmqt 302001
glfls 
expires:202605010800;;799066

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



lsz263-010800-
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-
401 pm edt thu apr 30 2026

.late this afternoon...west winds less than 10 knots. a slight
chance of rain and 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 southwest late. waves
calm to 2 feet. 
.friday night...west winds 5 to 15 knots diminishing to less than
10 knots late. 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...southwest winds 5 to 15 knots veering west by mid
afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots increasing to 15 to
25 knots after midnight. waves building to 1 to 3 feet. 
.monday...west winds 20 to 30 knots diminishing to 10 to
20 knots. a chance of rain showers. waves building to 2 to
4 feet, then subsiding to calm to 2 feet. 
.tuesday...west winds 5 to 15 knots veering northwest. waves calm
to 2 feet. 

$$

fzus63 kmqt 302001
glfls 
expires:202605010800;;799067

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



lsz264-010800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt thu apr 30 2026

.late this afternoon...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...northwest winds 5 to 15 knots veering north after
midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots backing northwest late. waves
calm to 2 feet. 
.friday night...northwest winds 5 to 15 knots. 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 by mid
afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots becoming south
10 to 20 knots after midnight. waves building to 1 to 3 feet. 
.monday...west winds 20 to 30 knots becoming northwest 15 to
25 knots. a chance of rain showers. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.tuesday...west winds 10 to 20 knots becoming northwest 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$