fzus63 kdtx 151952
glflh 
expires:202609160400;;507845

open lake forecast for lake huron
national weather service detroit/pontiac mi
352 pm edt tue sep 15 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...low pressure, 29.40 inches, tracks from northern
ontario into hudson bay tonight. it sends a cold front across the
great lakes overnight into early wednesday, with high pressure
then passing across northern ontario during the day wednesday.
the cold front stalls near the southern great lakes into
thursday.


lhz361-160400-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
352 pm edt tue sep 15 2026

.tonight...southwest winds 10 to 15 knots veering to the
northwest by midnight...then decreasing to 5 to 10 knots early in
the morning. waves 2 to 4 feet subsiding to 1 to 3 feet early in
the morning. 
.wednesday...northwest winds 5 to 10 knots in the morning
becoming light and variable. waves 2 feet or less. 
.wednesday night...light and variable winds. waves 2 feet or
less. 
.thursday...light and variable winds. waves 2 feet or less. 
.thursday night...west winds 5 to 10 knots becoming northwest
10 to 15 knots in the late evening and overnight. waves 1 to
3 feet. 
.friday...north winds 10 to 15 knots becoming northeast 5 to
10 knots late in the morning...then becoming light and variable
late in the afternoon becoming east 5 to 10 knots late in the
evening. a chance of showers late in the evening. waves 2 feet or
less. 
.saturday...southeast winds 10 to 15 knots becoming east 15 to
20 knots in the late morning and early afternoon...then
decreasing to 10 to 15 knots. a chance of showers. waves 2 to 4 
feet. 
.sunday...northeast winds 10 to 15 knots becoming east 5 to
10 knots early in the evening...then increasing to 10 to 15 knots
by midnight. waves 1 to 3 feet building to 2 to 4 feet by
midnight. 


$$

fzus63 kdtx 151952
glflh 
expires:202609160400;;507846

open lake forecast for lake huron
national weather service detroit/pontiac mi
352 pm edt tue sep 15 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...low pressure, 29.40 inches, tracks from northern
ontario into hudson bay tonight. it sends a cold front across the
great lakes overnight into early wednesday, with high pressure
then passing across northern ontario during the day wednesday.
the cold front stalls near the southern great lakes into
thursday.


lhz362-363-160400-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
352 pm edt tue sep 15 2026

.tonight...south winds 15 to 20 knots with gusts to around
30 knots becoming southwest 10 to 15 knots late in the evening...
then veering to the west after midnight veering to the west 10 to
15 knots early in the morning. waves 6 to 9 feet subsiding to
2 to 4 feet. waves occasionally around 12 feet. 
.wednesday...north winds 5 to 10 knots. waves 1 to 3 feet. 
.wednesday night...light and variable winds. waves 2 feet or
less. 
.thursday...light and variable winds. waves 2 feet or less. 
.thursday night...north winds 5 to 10 knots becoming northwest
10 to 15 knots in the late evening and overnight. waves 2 feet or
less building to 2 to 4 feet after midnight. 
.friday...north winds 10 to 15 knots becoming northeast 5 to
10 knots late in the morning...then becoming east 10 to 15 knots
late in the evening. a chance of showers late in the evening.
waves 2 to 4 feet subsiding to 1 to 3 feet. 
.saturday...east winds 10 to 15 knots becoming southeast 15 to
20 knots in the late morning and early afternoon...then becoming
east 10 to 15 knots. a chance of showers early in the morning... 
then showers likely in the late morning and early afternoon. a 
chance of showers. waves 1 to 3 feet building to 2 to 4 feet. 
.sunday...northeast winds 10 to 15 knots increasing to 15 to
20 knots. waves 3 to 5 feet. 


$$

fzus63 kdtx 151952
glflh 
expires:202609160400;;507847

open lake forecast for lake huron
national weather service detroit/pontiac mi
352 pm edt tue sep 15 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...low pressure, 29.40 inches, tracks from northern
ontario into hudson bay tonight. it sends a cold front across the
great lakes overnight into early wednesday, with high pressure
then passing across northern ontario during the day wednesday.
the cold front stalls near the southern great lakes into
thursday.


lhz462>464-160400-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
352 pm edt tue sep 15 2026

.tonight...south winds 10 to 15 knots decreasing to 5 to 10 knots
late in the evening...then veering to the west after midnight
becoming west 5 to 10 knots early in the morning. waves 3 to
5 feet subsiding to 1 to 3 feet in the late evening and
overnight. 
.wednesday...north winds 10 to 15 knots. waves 1 to 3 feet. 
.wednesday night...northeast winds 5 to 10 knots  becoming light
and variable. waves 2 feet or less. 
.thursday...north winds 5 to 10 knots. waves 2 feet or less. 
.thursday night...north winds 5 to 10 knots increasing to 10 to
15 knots after midnight. waves 1 to 3 feet. 
.friday...north winds 10 to 15 knots veering to the east late in
the evening. a chance of showers late in the evening. waves 2 to
4 feet subsiding to 1 to 3 feet late in the afternoon. 
.saturday...east winds 10 to 15 knots becoming southeast 15 to
20 knots until early evening...then becoming east 10 to 15 knots
by midnight. showers early in the morning...then showers likely
early in the evening. a chance of showers by midnight. waves 2 to
4 feet. 
.sunday...northeast winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers until afternoon. waves 2 to 4 feet.



$$

fzus63 kmkx 152002
glflm 
expires:202609160315;;508186

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
302 pm cdt tue sep 15 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...

scattered showers and weak thunderstorms remain possible over 
southern portions of the lake later today through wednesday as a
frontal boundary remains stalled south of the lake. a separate
cold front is set to cross the lake later this afternoon,
allowing the ongoing breezy southwest winds to veer northwest
and decelerate. 

high pressure around 30.4 inches will track east across southern
ontario canada late tonight through wednesday, veering winds due
north then northeast. predominantly light and variable winds
expected late wednesday night through thursday as additional
high pressure forms over manitoba and weakens the pressure
gradient. 

breezy east to northeast winds may then develop late this week
into this weekend as the aforementioned high pressure shifts
east across ontario canada and low pressure spreads east from
the great plains. the gradient between these two systems could
drive gusty winds from various directions depending on system
track, though our best guess is predominantly east (northeast to
southeast) for the time being. 


lmz261-362-364-366-563-565-567-868-160315-
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-
302 pm cdt tue sep 15 2026

sheboygan wi to pentwater mi north...

.tonight...west winds to 30 kt becoming northwest 10 to 20 kt
late this evening, then becoming north after midnight becoming
north 10 to 20 kt late. waves 4 to 7 ft occasionally to 9 ft
subsiding to 2 to 4 ft. 
.wednesday...north winds 10 to 20 kt becoming northeast 5 to
10 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.wednesday night...northeast winds 10 to 15 kt becoming
southeast. waves 1 to 2 ft. 
.thursday...east winds 10 to 15 kt backing to northwest. waves
1 to 2 ft. 
.thursday night...north winds 10 to 15 kt becoming northeast.
waves 1 to 3 ft. 
.friday...east winds 10 to 15 kt. waves 1 to 3 ft. 
.friday night...east winds to 30 kt becoming southeast. showers
likely. waves 4 to 6 ft occasionally to 8 ft building to 6 to
9 ft occasionally to 12 ft. 
.saturday...east winds to 30 kt. chance of showers. waves 7 to
10 ft occasionally to 13 ft. 
.sunday...northeast winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft.  

$$

fzus63 kmkx 152002
glflm 
expires:202609160315;;508187

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
302 pm cdt tue sep 15 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...

scattered showers and weak thunderstorms remain possible over 
southern portions of the lake later today through wednesday as a
frontal boundary remains stalled south of the lake. a separate
cold front is set to cross the lake later this afternoon,
allowing the ongoing breezy southwest winds to veer northwest
and decelerate. 

high pressure around 30.4 inches will track east across southern
ontario canada late tonight through wednesday, veering winds due
north then northeast. predominantly light and variable winds
expected late wednesday night through thursday as additional
high pressure forms over manitoba and weakens the pressure
gradient. 

breezy east to northeast winds may then develop late this week
into this weekend as the aforementioned high pressure shifts
east across ontario canada and low pressure spreads east from
the great plains. the gradient between these two systems could
drive gusty winds from various directions depending on system
track, though our best guess is predominantly east (northeast to
southeast) for the time being. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-160315-
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-
302 pm cdt tue sep 15 2026

sheboygan wi to pentwater mi south...

.tonight...west winds 10 to 20 kt veering to northeast. chance of
showers and slight chance of thunderstorms. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft. 
.wednesday...northeast winds 10 to 20 kt diminishing to 10 to
15 kt. slight chance of showers. waves 3 to 5 ft subsiding to
2 to 4 ft. 
.wednesday night...northeast winds 10 to 20 kt veering to south
10 to 15 kt. chance of showers overnight. waves 1 to 3 ft. 
.thursday...north winds 10 to 15 kt. chance of showers in the
morning. waves 1 to 2 ft. 
.thursday night...north winds 10 to 20 kt becoming northeast.
waves 2 to 4 ft. 
.friday...east winds 10 to 20 kt. chance of showers in the
afternoon. waves 3 to 5 ft. 
.friday night...east winds to 30 kt becoming southeast. showers
likely with a chance of thunderstorms. waves 4 to 7 ft
occasionally to 9 ft building to 7 to 10 ft occasionally to
13 ft. 
.saturday...southeast winds to 30 kt becoming south. showers with
a chance of thunderstorms. waves 8 to 11 ft occasionally to
14 ft. 
.sunday...northeast winds 15 to 25 kt. chance of showers. waves
4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmqt 152001
glfls 
expires:202609160800;;508110

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue sep 15 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 29.4 inch low is working into northern ontario this afternoon, 
bringing 29.7 inch troughing across lake superior. meanwhile, 30.2 
inch high pressure over the northern plains strengthens to 30.4 
inches as it crosses the upper great lakes on tomorrow. high 
pressure ridging around 30.3 inches then settles over lake superior 
through the rest of the workweek. 




lsz162-160800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt tue sep 15 2026 /301 pm cdt tue sep 15 2026/

...gale warning in effect until 5 pm edt /4 pm cdt/ this
afternoon...

.late this afternoon...west winds 20 to 30 knots. waves 4 to
7 feet occasionally to 9 feet subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tonight...west winds 10 to 20 knots diminishing to 5 to 15 knots
after midnight, then veering northwest late. waves subsiding to
calm to 2 feet. 
.wednesday...north winds 5 to 15 knots veering east in the
afternoon. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots diminishing to less
than 10 knots after midnight, then veering west late. a slight
chance of showers through midnight. waves calm to 2 feet. 
.thursday...west winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots becoming northeast
10 to 20 knots after midnight. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. waves building to 1 to 3 feet. 
.friday night...east winds 15 to 25 knots. a chance of showers.
waves 1 to 3 feet. 
.saturday...northeast winds 20 to 30 knots diminishing to 15 to
25 knots. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.sunday...northeast winds 20 to 30 knots diminishing to 15 to
25 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202609160800;;508111

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue sep 15 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 29.4 inch low is working into northern ontario this afternoon, 
bringing 29.7 inch troughing across lake superior. meanwhile, 30.2 
inch high pressure over the northern plains strengthens to 30.4 
inches as it crosses the upper great lakes on tomorrow. high 
pressure ridging around 30.3 inches then settles over lake superior 
through the rest of the workweek. 




lsz263-160800-
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 tue sep 15 2026

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

.late this afternoon...west gales to 35 knots. waves 9 to 12 feet
occasionally to 15 feet subsiding to 6 to 9 feet occasionally to
11 feet. 
.tonight...west winds 20 to 30 knots diminishing to 10 to
20 knots after midnight, then veering northwest late. waves
subsiding to calm to 2 feet. 
.wednesday...north winds 5 to 15 knots diminishing to less than
10 knots in the afternoon, then becoming east 5 to 15 knots late.
waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots veering southwest
late. a slight chance of showers through midnight. waves calm to
2 feet. 
.thursday...west winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves calm to 2 feet. 
.friday night...east winds 10 to 20 knots. a chance of showers.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.saturday...east winds 15 to 25 knots backing northeast. waves
building to 1 to 3 feet. 
.sunday...northeast winds 20 to 30 knots becoming east 15 to
25 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202609160800;;508112

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue sep 15 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 29.4 inch low is working into northern ontario this afternoon, 
bringing 29.7 inch troughing across lake superior. meanwhile, 30.2 
inch high pressure over the northern plains strengthens to 30.4 
inches as it crosses the upper great lakes on tomorrow. high 
pressure ridging around 30.3 inches then settles over lake superior 
through the rest of the workweek. 




lsz264-160800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt tue sep 15 2026

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

.late this afternoon...west gales to 40 knots. waves 10 to
14 feet occasionally to 18 feet subsiding to 8 to 11 feet
occasionally to 14 feet. 
.tonight...west winds 20 to 30 knots diminishing to 10 to
20 knots after midnight, then becoming northwest 5 to 15 knots
late. waves subsiding to 1 to 3 feet. 
.wednesday...northwest winds 5 to 15 knots becoming north less
than 10 knots in the afternoon, then veering southeast late.
waves subsiding to calm to 2 feet. 
.wednesday night...southeast winds 5 to 15 knots veering south
after midnight. a slight chance of showers through midnight.
waves calm to 2 feet. 
.thursday...west winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...east winds 10 to 20 knots backing northeast. waves
calm to 2 feet. 
.sunday...east winds 10 to 20 knots diminishing to 5 to 15 knots.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202609160800;;508113

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue sep 15 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 29.4 inch low is working into northern ontario this afternoon, 
bringing 29.7 inch troughing across lake superior. meanwhile, 30.2 
inch high pressure over the northern plains strengthens to 30.4 
inches as it crosses the upper great lakes on tomorrow. high 
pressure ridging around 30.3 inches then settles over lake superior 
through the rest of the workweek. 




lsz265-160800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt tue sep 15 2026

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

.late this afternoon...west gales to 40 knots. waves 5 to 9 feet
occasionally to 11 feet. 
.tonight...west gales to 35 knots diminishing to 15 to 25 knots
after midnight, then becoming northwest 10 to 20 knots late.
waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots veering east late.
waves calm to 2 feet. 
.wednesday night...southeast winds 10 to 20 knots veering
southwest late. a slight chance of showers. waves calm to 2 feet.
.thursday...west winds 10 to 20 knots veering northwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...north winds 10 to 20 knots veering northeast
after midnight. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. waves calm to 2 feet. 
.friday night...southeast winds 15 to 25 knots. a chance of
showers. waves building to 1 to 3 feet, then subsiding to calm to
2 feet. 
.saturday...east winds 15 to 25 knots backing northeast. a chance
of showers. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.sunday...northeast winds 20 to 30 knots becoming east 15 to
25 knots. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202609160800;;508114

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue sep 15 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 29.4 inch low is working into northern ontario this afternoon, 
bringing 29.7 inch troughing across lake superior. meanwhile, 30.2 
inch high pressure over the northern plains strengthens to 30.4 
inches as it crosses the upper great lakes on tomorrow. high 
pressure ridging around 30.3 inches then settles over lake superior 
through the rest of the workweek. 




lsz266-160800-
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 tue sep 15 2026

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

.late this afternoon...west gales to 40 knots. waves 10 to
14 feet occasionally to 18 feet subsiding to 8 to 11 feet
occasionally to 14 feet. 
.tonight...west gales to 35 knots diminishing to 15 to 25 knots
after midnight, then becoming northwest 10 to 20 knots late.
waves subsiding to 1 to 3 feet. 
.wednesday...northwest winds 5 to 15 knots diminishing to less
than 10 knots in the afternoon, then becoming northeast 5 to
15 knots late. waves subsiding to calm to 2 feet. 
.wednesday night...southeast winds 5 to 15 knots veering south
after midnight. a slight chance of showers. waves calm to 2 feet.
.thursday...west winds 10 to 20 knots veering northwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...north winds 10 to 20 knots veering northeast
after midnight. waves building to 1 to 3 feet. 
.friday...east winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. waves subsiding to calm to 2 feet. 
.friday night...east winds 10 to 20 knots veering southeast after
midnight. a chance of showers. waves building to 1 to 3 feet. 
.saturday...east winds 10 to 20 knots backing northeast. a chance
of showers. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 
.sunday...northeast winds 15 to 25 knots becoming east 10 to
20 knots. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202609160800;;508115

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue sep 15 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 29.4 inch low is working into northern ontario this afternoon, 
bringing 29.7 inch troughing across lake superior. meanwhile, 30.2 
inch high pressure over the northern plains strengthens to 30.4 
inches as it crosses the upper great lakes on tomorrow. high 
pressure ridging around 30.3 inches then settles over lake superior 
through the rest of the workweek. 




lsz267-160800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt tue sep 15 2026

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

.late this afternoon...west gales to 40 knots. waves 5 to 8 feet
occasionally to 10 feet building to 7 to 10 feet occasionally to
13 feet. 
.tonight...west gales to 35 knots diminishing to 15 to 25 knots
after midnight, then becoming northwest 10 to 20 knots late.
waves subsiding to 2 to 4 feet. 
.wednesday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots veering south after
midnight. a slight chance of showers. waves calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots becoming northwest
10 to 20 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...northwest winds 15 to 25 knots becoming
northeast 10 to 20 knots after midnight. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.friday...east winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.friday night...east winds 5 to 15 knots becoming southeast 10 to
20 knots after midnight. a chance of showers. waves calm to
2 feet. 
.saturday...east winds 10 to 20 knots backing northeast. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.sunday...northeast winds 10 to 20 knots veering east. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$