fzus63 kdtx 151339
glflh 
expires:202610152145;;139875

open lake forecast for lake huron
national weather service detroit/pontiac mi
939 am edt thu oct 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...high pressure, 30.30 inches, passes across the
northern great lakes this morning. low pressure is forecast to
strengthen to 29.60 inches as it tracks across the central great
lakes thursday night and early friday. a strong cold front in its
wake brings likely northerly gales late friday.


lhz361-362-152145-
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-
939 am edt thu oct 15 2026

...gale warning in effect from friday afternoon through late
friday night...

.rest of today...southeast winds 10 to 15 knots. waves 1 to
3 feet building to 2 to 4 feet in the afternoon. 
.tonight...southeast winds 10 to 15 knots backing to the
northeast early in the morning. rain. waves 2 to 4 feet. 
.friday...northeast winds 10 to 15 knots becoming north 15 to
20 knots with gusts to around 30 knots in the late morning and
early afternoon...then increasing to 30 knots with gusts to
35 knot gales early in the afternoon. a chance of rain. waves
2 to 4 feet building to 6 to 9 feet in the late morning and
afternoon. waves occasionally around 12 feet. 
.friday night...north winds to 30 knots with gusts to 35 knot
gales decreasing to 15 to 20 knots. waves 8 to 12 feet. waves
occasionally around 15 feet. 
.saturday...northwest winds 10 to 15 knots backing to the west
with gusts to around 30 knots late in the morning...then becoming
southwest 15 to 20 knots with gusts to around 30 knots late in
the afternoon. waves 3 to 5 feet. 
.sunday...southwest winds 15 to 20 knots with gusts to 35 knot
gales. waves 4 to 6 feet building to 6 to 9 feet. waves
occasionally around 12 feet. 
.monday...southwest winds 10 to 15 knots becoming light and
variable. waves 3 to 5 feet subsiding to 2 feet or less . 


$$

fzus63 kdtx 151339
glflh 
expires:202610152145;;139876

open lake forecast for lake huron
national weather service detroit/pontiac mi
939 am edt thu oct 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...high pressure, 30.30 inches, passes across the
northern great lakes this morning. low pressure is forecast to
strengthen to 29.60 inches as it tracks across the central great
lakes thursday night and early friday. a strong cold front in its
wake brings likely northerly gales late friday.


lhz363-462>464-152145-
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-
939 am edt thu oct 15 2026

...gale warning in effect from friday afternoon through late
friday night...

.rest of today...east winds 10 to 15 knots decreasing to 5 to
10 knots late in the afternoon. waves 1 to 3 feet. 
.tonight...east winds 10 to 15 knots becoming southeast 15 to
20 knots by midnight...then becoming east 10 to 15 knots early in
the morning. rain. waves 1 to 3 feet building to 3 to 5 feet in
the late evening and overnight. 
.friday...west winds 15 to 20 knots increasing to 20 to 25 knots
with gusts to around 30 knots in the late morning and early
afternoon...then becoming north to 30 knots with gusts to 35 knot
gales early in the afternoon. a chance of rain. waves 3 to 5 feet
building to 10 to 14 feet. waves occasionally around 18 feet. 
.friday night...north winds to 30 knots decreasing to 20 to
25 knots after midnight. gusts to 35 knot gales. a chance of
rain. waves 12 to 16 feet. waves occasionally around 20 feet. 
.saturday...north winds 15 to 20 knots becoming northwest 10 to
15 knots late in the morning...then becoming southwest 15 to
20 knots late in the afternoon. waves 8 to 12 feet subsiding to
4 to 6 feet. waves occasionally around 15 feet. 
.sunday...southwest winds 20 to 25 knots with gusts to 35 knot
gales. waves 6 to 9 feet. waves occasionally around 12 feet. 
.monday...southwest winds 15 to 20 knots decreasing to 5 to
10 knots. waves 5 to 7 feet subsiding to 1 to 3 feet. waves
occasionally around 10 feet. 


$$

fzus63 kmkx 151348
glflm 
expires:202610152130;;140082

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
848 am cdt thu oct 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...

two areas of low pressure are progged to merge over the great 
lakes region into a single low pressure later today into tonight 
and deepen to around 29.4 inches as it shifts into the eastern 
great lakes through friday. expect a northerly wind shift to ramp
up and increase to gales and nearing storm force at times friday 
on the backside of the departing low pressure while a strong high 
pressure around 30.7 inches builds to the west. a gale warning
remains in effect for all of the open waters of lake michigan 
friday morning into friday night. 

widespread rain is expected this afternoon into tonight, with a 
few thunderstorms possible over the southern open waters. lake 
effect showers & thunderstorms may linger into friday along the 
back side of departing low pressure. a few waterspouts are 
possible in the friday showers/thunderstorms, particularly over 
the southern half of lake michigan. 

as the high sinks toward the ohio river valley on saturday, strong low
pressure around 29.0 inches will develop in northern manitoba
through the weekend. the tight pressure gradient may bring 
southwest gales to lake michigan on sunday.


lmz261-362-364-366-563-565-567-868-152130-
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-
848 am cdt thu oct 15 2026

sheboygan wi to pentwater mi north...

...gale warning in effect from friday morning through late friday
night...

.rest of today...southeast winds 10 to 15 kt increasing to 10 to
20 kt. showers this afternoon. waves 3 to 5 ft. 
.tonight...east winds 10 to 20 kt diminishing to 10 to 15 kt late
in the evening, then becoming northeast 10 to 20 kt after
midnight becoming north to 30 kt late. showers in the evening,
then chance of showers overnight. waves 3 to 5 ft building to
4 to 7 ft occasionally to 9 ft. 
.friday...north winds to 30 kt increasing to gales to 45 kt.
chance of showers. waves 6 to 9 ft occasionally to 12 ft building
to 12 to 16 ft occasionally to 21 ft. 
.friday night...north gales to 40 kt diminishing to 30 kt
overnight. waves 12 to 16 ft occasionally to 21 ft subsiding to
8 to 12 ft occasionally to 16 ft. 
.saturday...west winds 15 to 25 kt becoming southwest to 30 kt.
waves 4 to 6 ft occasionally to 8 ft building to 4 to 7 ft
occasionally to 9 ft. 
.saturday night...southwest winds to 30 kt increasing to gales to
35 kt. waves 6 to 9 ft occasionally to 12 ft building to 8 to
12 ft occasionally to 16 ft. 
.sunday...southwest gales to 40 kt. waves 10 to 14 ft
occasionally to 18 ft. 
.monday...southwest winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft.  

$$

fzus63 kmkx 151348
glflm 
expires:202610152130;;140083

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
848 am cdt thu oct 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...

two areas of low pressure are progged to merge over the great 
lakes region into a single low pressure later today into tonight 
and deepen to around 29.4 inches as it shifts into the eastern 
great lakes through friday. expect a northerly wind shift to ramp
up and increase to gales and nearing storm force at times friday 
on the backside of the departing low pressure while a strong high 
pressure around 30.7 inches builds to the west. a gale warning
remains in effect for all of the open waters of lake michigan 
friday morning into friday night. 

widespread rain is expected this afternoon into tonight, with a 
few thunderstorms possible over the southern open waters. lake 
effect showers & thunderstorms may linger into friday along the 
back side of departing low pressure. a few waterspouts are 
possible in the friday showers/thunderstorms, particularly over 
the southern half of lake michigan. 

as the high sinks toward the ohio river valley on saturday, strong low
pressure around 29.0 inches will develop in northern manitoba
through the weekend. the tight pressure gradient may bring 
southwest gales to lake michigan on sunday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-152130-
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-
848 am cdt thu oct 15 2026

sheboygan wi to pentwater mi south...

...gale warning in effect from friday morning through late friday
night...

.rest of today...east winds 10 to 20 kt becoming southeast 15 to
25 kt. slight chance of showers through mid morning, then showers
this afternoon. waves 4 to 7 ft occasionally to 9 ft. 
.tonight...southeast winds 10 to 20 kt increasing to 15 to 25 kt
late in the evening, then veering to northwest to 30 kt
overnight. showers and slight chance of thunderstorms in the
evening, then chance of showers overnight. waves 4 to 6 ft
occasionally to 8 ft building to 7 to 10 ft occasionally to
13 ft. 
.friday...northwest winds to 30 kt increasing to gales to 35 kt
late in the morning, then becoming north gales to 40 kt early in
the afternoon increasing to gales to 45 kt late. chance of
showers in the morning, then showers likely in the afternoon.
waves 8 to 11 ft occasionally to 14 ft building to 14 to 18 ft
occasionally to 23 ft. 
.friday night...north gales to 45 kt diminishing to 30 kt
overnight. chance of rain showers in the evening. waves 15 to
20 ft occasionally to 26 ft subsiding to 12 to 16 ft occasionally
to 21 ft. 
.saturday...north winds 10 to 20 kt backing to southwest 15 to
25 kt. waves 7 to 10 ft occasionally to 13 ft subsiding to 3 to
5 ft. 
.saturday night...southwest winds 15 to 25 kt increasing to
30 kt. waves 7 to 10 ft occasionally to 13 ft. 
.sunday...southwest winds to 30 kt increasing to gales to 40 kt.
waves 10 to 14 ft occasionally to 18 ft. 
.monday...southwest winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft.  

$$

fzus63 kmqt 151401
glfls 
expires:202610152000;;140451

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

two 29.9 inch lows, one over lake winnipeg and the other over 
northern illinois late this morning and early this afternoon, merge 
with one another to form a 29.6 inch low over lower michigan and 
lake huron tonight. in its wake, a 30.9 inch high lifts off of the 
central rockies into the great plains on friday, weakening to 30.6 
inches as it does so while the aforementioned low deepens to 29.4 
inches and heads towards the mouth of the st. lawrence river. the 
high slides south of the great lakes at 30.5 inches by saturday 
night as a 29.4 inch alberta clipper moves through the canadian 
prairies towards hudson bay, deepening to 29.0 inches by the time it 
arrives on sunday. this low is projected to bring troughing of 29.9 
inches over lake superior. as the low moves east over hudson bay and 
weakens with time sunday night into monday, expect high pressure 
ridging of 30.3 inches to return to the upper great lakes. the high 
pressure ridging strengthens to 30.4 inches over lake superior by 
tuesday. 




lsz162-152000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt thu oct 15 2026 /901 am cdt thu oct 15 2026/

...gale warning in effect from late tonight through friday
afternoon...

.rest of today...south winds 5 to 15 knots veering southwest
late. a chance of showers by late morning, then showers by mid
afternoon. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots becoming northwest 15 to
25 knots after midnight, then becoming north gales to 40 knots
late. a chance of showers. waves building to 4 to 7 feet
occasionally to 9 feet. 
.friday...north gales to 40 knots diminishing to 20 to 30 knots
late. waves building to 8 to 11 feet occasionally to 14 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet. 
.friday night...northwest winds 10 to 20 knots becoming southwest
20 to 30 knots after midnight. waves subsiding to calm to 2 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.saturday...southwest gales to 35 knots. waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet. 
.saturday night...southwest gales to 40 knots. waves building to
8 to 11 feet occasionally to 14 feet. 
.sunday...southwest gales to 40 knots becoming west 20 to
30 knots. waves building to 9 to 12 feet occasionally to 15 feet,
then subsiding to calm to 2 feet. 
.monday...west winds 5 to 15 knots veering north. waves calm to
2 feet. 

$$

fzus63 kmqt 151401
glfls 
expires:202610152000;;140452

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

two 29.9 inch lows, one over lake winnipeg and the other over 
northern illinois late this morning and early this afternoon, merge 
with one another to form a 29.6 inch low over lower michigan and 
lake huron tonight. in its wake, a 30.9 inch high lifts off of the 
central rockies into the great plains on friday, weakening to 30.6 
inches as it does so while the aforementioned low deepens to 29.4 
inches and heads towards the mouth of the st. lawrence river. the 
high slides south of the great lakes at 30.5 inches by saturday 
night as a 29.4 inch alberta clipper moves through the canadian 
prairies towards hudson bay, deepening to 29.0 inches by the time it 
arrives on sunday. this low is projected to bring troughing of 29.9 
inches over lake superior. as the low moves east over hudson bay and 
weakens with time sunday night into monday, expect high pressure 
ridging of 30.3 inches to return to the upper great lakes. the high 
pressure ridging strengthens to 30.4 inches over lake superior by 
tuesday. 




lsz263-152000-
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 oct 15 2026

...gale warning in effect from late tonight through friday
afternoon...

.rest of today...south winds 5 to 15 knots. a chance of showers
by late morning, then showers by mid afternoon. waves calm to
2 feet. 
.tonight...west winds 10 to 20 knots becoming north 15 to
25 knots after midnight, then increasing to gales to 40 knots
late. showers through midnight, then a chance of showers after
midnight. waves building to 6 to 9 feet occasionally to 11 feet. 
.friday...north gales to 40 knots diminishing to 20 to 30 knots
late. a slight chance of rain showers through early afternoon.
waves building to 10 to 14 feet occasionally to 18 feet, then
subsiding to 4 to 7 feet occasionally to 9 feet. 
.friday night...northwest winds 15 to 25 knots becoming west
20 to 30 knots after midnight. waves subsiding to 1 to 3 feet,
then building to 3 to 6 feet occasionally to 8 feet. 
.saturday...southwest gales to 40 knots. waves building to 9 to
12 feet occasionally to 15 feet, then subsiding to 7 to 10 feet
occasionally to 13 feet. 
.saturday night...southwest gales to 45 knots. waves building to
10 to 14 feet occasionally to 18 feet. 
.sunday...southwest storm force winds to 50 knots becoming west
gales to 35 knots. waves subsiding to 1 to 3 feet. 
.monday...west winds 5 to 15 knots. waves subsiding to calm to
2 feet. 

$$

fzus63 kmqt 151401
glfls 
expires:202610152000;;140453

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

two 29.9 inch lows, one over lake winnipeg and the other over 
northern illinois late this morning and early this afternoon, merge 
with one another to form a 29.6 inch low over lower michigan and 
lake huron tonight. in its wake, a 30.9 inch high lifts off of the 
central rockies into the great plains on friday, weakening to 30.6 
inches as it does so while the aforementioned low deepens to 29.4 
inches and heads towards the mouth of the st. lawrence river. the 
high slides south of the great lakes at 30.5 inches by saturday 
night as a 29.4 inch alberta clipper moves through the canadian 
prairies towards hudson bay, deepening to 29.0 inches by the time it 
arrives on sunday. this low is projected to bring troughing of 29.9 
inches over lake superior. as the low moves east over hudson bay and 
weakens with time sunday night into monday, expect high pressure 
ridging of 30.3 inches to return to the upper great lakes. the high 
pressure ridging strengthens to 30.4 inches over lake superior by 
tuesday. 




lsz264-152000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 am edt thu oct 15 2026

...gale warning in effect from late tonight through friday
afternoon...

.rest of today...south winds 5 to 15 knots. a slight chance of
showers by late morning, then showers by mid afternoon. waves
calm to 2 feet. 
.tonight...south winds 5 to 15 knots becoming north 15 to
25 knots after midnight, then increasing to gales to 40 knots
late. showers. waves building to 6 to 9 feet occasionally to
11 feet. 
.friday...north gales to 45 knots. a slight chance of rain
showers through early afternoon. waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet. 
.friday night...northwest winds 20 to 30 knots backing west after
midnight. waves subsiding to 1 to 3 feet, then building to 3 to
5 feet occasionally to 7 feet. 
.saturday...west gales to 35 knots becoming southwest gales to
40 knots by mid afternoon. waves building to 9 to 12 feet
occasionally to 15 feet, then subsiding to 7 to 10 feet
occasionally to 13 feet. 
.saturday night...southwest gales to 40 knots. waves subsiding to
5 to 8 feet occasionally to 10 feet, then building to 9 to
12 feet occasionally to 15 feet. 
.sunday...southwest gales to 45 knots becoming west gales to
35 knots. waves building to 10 to 14 feet occasionally to
18 feet, then subsiding to 2 to 4 feet. 
.monday...west winds 5 to 15 knots. waves subsiding to calm to
2 feet. 

$$

fzus63 kmqt 151401
glfls 
expires:202610152000;;140454

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

two 29.9 inch lows, one over lake winnipeg and the other over 
northern illinois late this morning and early this afternoon, merge 
with one another to form a 29.6 inch low over lower michigan and 
lake huron tonight. in its wake, a 30.9 inch high lifts off of the 
central rockies into the great plains on friday, weakening to 30.6 
inches as it does so while the aforementioned low deepens to 29.4 
inches and heads towards the mouth of the st. lawrence river. the 
high slides south of the great lakes at 30.5 inches by saturday 
night as a 29.4 inch alberta clipper moves through the canadian 
prairies towards hudson bay, deepening to 29.0 inches by the time it 
arrives on sunday. this low is projected to bring troughing of 29.9 
inches over lake superior. as the low moves east over hudson bay and 
weakens with time sunday night into monday, expect high pressure 
ridging of 30.3 inches to return to the upper great lakes. the high 
pressure ridging strengthens to 30.4 inches over lake superior by 
tuesday. 




lsz265-152000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 am edt thu oct 15 2026

...gale warning in effect from friday morning through friday
evening...

.rest of today...south winds 10 to 20 knots backing southeast
late. a slight chance of showers by late morning, then showers by
mid afternoon. waves calm to 2 feet. 
.tonight...south winds 10 to 20 knots backing north after
midnight, then increasing to gales to 35 knots late. showers.
waves building to 4 to 7 feet occasionally to 9 feet. 
.friday...north gales to 45 knots with a few storm force gusts to
55 knots possible diminishing to gales to 45 knots late. a chance
of showers through early afternoon. waves building to 12 to
17 feet occasionally to 21 feet, then subsiding to 10 to 14 feet
occasionally to 18 feet. 
.friday night...northwest gales to 35 knots becoming west 15 to
25 knots after midnight. waves subsiding to 1 to 3 feet, then
building to 2 to 4 feet. 
.saturday...west gales to 35 knots diminishing to 20 to 30 knots
by mid afternoon. waves building to 4 to 7 feet occasionally to
9 feet, then subsiding to 2 to 4 feet. 
.saturday night...southwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. waves subsiding to 1 to 3 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.sunday...southwest gales to 40 knots becoming west 20 to
30 knots. waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to calm to 2 feet. 
.monday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 151401
glfls 
expires:202610152000;;140455

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

two 29.9 inch lows, one over lake winnipeg and the other over 
northern illinois late this morning and early this afternoon, merge 
with one another to form a 29.6 inch low over lower michigan and 
lake huron tonight. in its wake, a 30.9 inch high lifts off of the 
central rockies into the great plains on friday, weakening to 30.6 
inches as it does so while the aforementioned low deepens to 29.4 
inches and heads towards the mouth of the st. lawrence river. the 
high slides south of the great lakes at 30.5 inches by saturday 
night as a 29.4 inch alberta clipper moves through the canadian 
prairies towards hudson bay, deepening to 29.0 inches by the time it 
arrives on sunday. this low is projected to bring troughing of 29.9 
inches over lake superior. as the low moves east over hudson bay and 
weakens with time sunday night into monday, expect high pressure 
ridging of 30.3 inches to return to the upper great lakes. the high 
pressure ridging strengthens to 30.4 inches over lake superior by 
tuesday. 




lsz266-152000-
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 oct 15 2026

...gale warning in effect from friday morning through friday
evening...

.rest of today...south winds 10 to 20 knots backing southeast
late. showers by mid afternoon. waves 1 to 3 feet. 
.tonight...southeast winds 5 to 15 knots becoming northeast 10 to
20 knots after midnight, then becoming north gales to 35 knots
late. showers. waves subsiding to calm to 2 feet, then building
to 3 to 6 feet occasionally to 8 feet. 
.friday...north gales to 45 knots increasing to gales to 45 knots
with a few storm force gusts to 55 knots possible in the
afternoon, then diminishing to gales to 45 knots late. a chance
of showers through early afternoon. waves building to 15 to
20 feet occasionally to 25 feet, then subsiding to 12 to 17 feet
occasionally to 21 feet. 
.friday night...north gales to 35 knots becoming west 15 to
25 knots after midnight. a slight chance of rain showers through
midnight. waves subsiding to 2 to 4 feet. 
.saturday...west gales to 35 knots. waves building to 7 to
11 feet occasionally to 14 feet. 
.saturday night...southwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. waves subsiding to 4 to 7 feet
occasionally to 9 feet, then building to 6 to 9 feet occasionally
to 11 feet. 
.sunday...southwest gales to 35 knots diminishing to 20 to
30 knots. waves building to 9 to 12 feet occasionally to 15 feet,
then subsiding to 2 to 4 feet. 
.monday...west winds 5 to 15 knots. waves subsiding to calm to
2 feet. 

$$

fzus63 kmqt 151401
glfls 
expires:202610152000;;140456

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

two 29.9 inch lows, one over lake winnipeg and the other over 
northern illinois late this morning and early this afternoon, merge 
with one another to form a 29.6 inch low over lower michigan and 
lake huron tonight. in its wake, a 30.9 inch high lifts off of the 
central rockies into the great plains on friday, weakening to 30.6 
inches as it does so while the aforementioned low deepens to 29.4 
inches and heads towards the mouth of the st. lawrence river. the 
high slides south of the great lakes at 30.5 inches by saturday 
night as a 29.4 inch alberta clipper moves through the canadian 
prairies towards hudson bay, deepening to 29.0 inches by the time it 
arrives on sunday. this low is projected to bring troughing of 29.9 
inches over lake superior. as the low moves east over hudson bay and 
weakens with time sunday night into monday, expect high pressure 
ridging of 30.3 inches to return to the upper great lakes. the high 
pressure ridging strengthens to 30.4 inches over lake superior by 
tuesday. 




lsz267-152000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 am edt thu oct 15 2026

...gale warning in effect from friday morning through friday
evening...

.rest of today...southeast winds 10 to 20 knots. a chance of
showers by mid afternoon. waves 1 to 3 feet. 
.tonight...southeast winds 10 to 20 knots backing east after
midnight, then becoming northeast 15 to 25 knots late. showers.
waves subsiding to calm to 2 feet, then building to 2 to 4 feet. 
.friday...north gales to 40 knots. a chance of showers through
early afternoon. waves building to 10 to 14 feet occasionally to
18 feet. 
.friday night...north gales to 35 knots becoming west 15 to
25 knots after midnight. waves subsiding to 2 to 4 feet. 
.saturday...west winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.saturday night...southwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. waves building to 5 to 8 feet
occasionally to 10 feet. 
.sunday...southwest winds 20 to 30 knots. waves subsiding to 2 to
4 feet. 
.monday...west winds 5 to 15 knots. waves subsiding to calm to
2 feet. 

$$