fzus61 kbuf 172003
glflo 
expires:202607180300;;137182

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt fri jul 17 2026

for waters beyond five nautical miles of shore on lake ontario

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 30.0 inch ridge of high pressure will slide east of the lake this 
evening to the atlantic shoreline and in its wake a warm front will 
lift northeastward across the lake tonight through tomorrow morning. 
following this warm front a cold front will slice across the lake 
saturday afternoon and evening with this front attached to a 29.4 
inch area of low pressure crossing southern canada. a 30.0 inch area 
of high pressure will build across the great lakes region from west 
to east sunday into monday, followed by another cold front tuesday 
night with this front attached to a 29.5 inch area of low pressure 
near james bay. a secondary cold front will cross the lake 
wednesday.


loz063>065-180300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 pm edt fri jul 17 2026

.tonight...southeast winds 5 to 15 knots becoming south 15 to
20 knots. areas of smoke this evening. waves 1 foot or less
building to 1 to 3 feet. 
.saturday...south winds 15 to 25 knots becoming west. showers in
the morning, then showers with a chance of thunderstorms in the
afternoon. some thunderstorms may produce gusty winds in the
afternoon. waves 2 to 4 feet building to 3 to 6 feet. 
.saturday night...west winds 15 to 25 knots becoming northwest.
showers with a chance of thunderstorms in the evening. some
thunderstorms may produce gusty winds in the evening. waves 3 to
6 feet building to 4 to 7 feet, then subsiding to 3 to 6 feet.
waves occasionally around 9 feet. 
.sunday...northwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.sunday night...west winds 5 to 15 knots. waves 1 to 3 feet. 
.monday...southwest winds 5 to 15 knots becoming south 15 to
20 knots. a chance of showers monday night. waves 2 feet or less
building to 2 to 4 feet. 
.tuesday...south winds 15 to 25 knots becoming west. showers with
a chance of thunderstorms. waves 3 to 5 feet building to 3 to
6 feet. 
.wednesday...west winds 15 to 25 knots. showers likely during the
day, then a chance of showers wednesday night. waves 4 to 7 feet
subsiding to 3 to 6 feet. waves occasionally around 9 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 172003
glflo 
expires:202607180300;;137181

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt fri jul 17 2026

for waters beyond five nautical miles of shore on lake ontario

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 30.0 inch ridge of high pressure will slide east of the lake this 
evening to the atlantic shoreline and in its wake a warm front will 
lift northeastward across the lake tonight through tomorrow morning. 
following this warm front a cold front will slice across the lake 
saturday afternoon and evening with this front attached to a 29.4 
inch area of low pressure crossing southern canada. a 30.0 inch area 
of high pressure will build across the great lakes region from west 
to east sunday into monday, followed by another cold front tuesday 
night with this front attached to a 29.5 inch area of low pressure 
near james bay. a secondary cold front will cross the lake 
wednesday.


loz062-180300-
lake ontario open waters from the niagara river to hamlin beach-
403 pm edt fri jul 17 2026

.tonight...southeast winds 5 to 15 knots becoming south. smoke
through the early overnight. waves 1 foot or less. 
.saturday...southwest winds 15 to 20 knots becoming west. showers
likely early, then a chance of showers and thunderstorms late in
the morning. showers with a chance of thunderstorms in the
afternoon. some thunderstorms may produce gusty winds in the
afternoon. waves 1 to 3 feet building to 3 to 6 feet. 
.saturday night...west winds 15 to 20 knots becoming north.
showers likely in the evening. waves 3 to 5 feet. 
.sunday...north winds 5 to 15 knots becoming west. waves 1 to
3 feet. 
.sunday night...west winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.monday...southwest winds 5 to 15 knots becoming south 15 to
20 knots. showers likely monday night. waves 1 to 3 feet. 
.tuesday...south winds 15 to 25 knots becoming west. showers with
a chance of thunderstorms. waves 3 to 5 feet. 
.wednesday...west winds 15 to 20 knots. a chance of showers
during the day. waves 3 to 6 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 171956
glfle 
expires:202607180215;;136830

open lake forecast for lake erie
national weather service cleveland oh
356 pm edt fri jul 17 2026

for waters beyond five nautical miles of shore on lake erie

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 29.60 inches will move into the northern great lakes 
tonight and will reach new england by saturday evening while 
deepening to 29.50 inches. this will lift a warm front across lake 
erie tonight before a strong cold front drops across the lake 
saturday night. high pressure 30.00 inches will build across the 
great lakes sunday and monday before another cold front crosses 
tuesday. a trough averaging 29.80 inches will linger over lake erie 
wednesday.


lez061-166>169-180215-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-geneva-on-
the-lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
356 pm edt fri jul 17 2026

...dense smoke advisory in effect until midnight edt tonight...

.tonight...east winds 5 to 15 knots becoming southwest 15 to
20 knots. smoke early, then areas of smoke late this evening.
smoke after midnight. a chance of showers with a slight chance of
thunderstorms after midnight. a chance of showers and
thunderstorms late. waves 1 to 3 feet. 
.saturday...southwest winds 15 to 25 knots becoming west. smoke
early. a chance of showers with a slight chance of thunderstorms
in the morning, then a chance of showers and thunderstorms early
in the afternoon. showers and thunderstorms late. waves 3 to
6 feet building to 4 to 7 feet. waves occasionally around 9 feet.
.saturday night...west winds 15 to 20 knots becoming north.
showers likely with a chance of thunderstorms in the evening.
waves 3 to 6 feet. 
.sunday...north winds 5 to 15 knots. waves 2 to 4 feet subsiding
to 1 to 3 feet. 
.sunday night...west winds 10 knots or less becoming south. waves
1 foot or less. 
.monday...south winds 5 to 15 knots increasing to 15 to 20 knots.
showers likely with a chance of thunderstorms monday night. waves
1 foot or less building to 3 to 6 feet. 
.tuesday...southwest winds 15 to 25 knots becoming northwest.
showers with a chance of thunderstorms during the day, then a
chance of showers and thunderstorms tuesday night. waves 4 to
7 feet subsiding to 3 to 6 feet. waves occasionally around
9 feet. 
.wednesday...west winds 15 to 20 knots becoming northwest 10 to
15 knots. a chance of showers during the day. waves 3 to 6 feet
subsiding to 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 171956
glfle 
expires:202607180215;;136828

open lake forecast for lake erie
national weather service cleveland oh
356 pm edt fri jul 17 2026

for waters beyond five nautical miles of shore on lake erie

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 29.60 inches will move into the northern great lakes 
tonight and will reach new england by saturday evening while 
deepening to 29.50 inches. this will lift a warm front across lake 
erie tonight before a strong cold front drops across the lake 
saturday night. high pressure 30.00 inches will build across the 
great lakes sunday and monday before another cold front crosses 
tuesday. a trough averaging 29.80 inches will linger over lake erie 
wednesday.


lez162-163-180215-
detroit river lt. to maumee bay oh to reno beach oh beyond 5nm
offshoreline to us-canadian border-
reno beach to the islands oh beyond 5nm off shoreline to us-
canadian border-
356 pm edt fri jul 17 2026

.tonight...southeast winds 5 to 15 knots becoming southwest.
smoke this evening, then patchy smoke after midnight. a slight
chance of showers and thunderstorms early, then a chance of
showers and thunderstorms late this evening. a slight chance of
showers and thunderstorms after midnight. waves 2 feet or less. 
.saturday...southwest winds 15 to 20 knots becoming west. a
slight chance of showers early. a chance of showers and
thunderstorms early in the afternoon, then showers and
thunderstorms likely late. waves 1 to 3 feet. 
.saturday night...northwest winds 15 to 20 knots becoming
northeast. a chance of showers and thunderstorms in the evening.
waves 1 to 3 feet building to 2 to 4 feet. 
.sunday...northeast winds 5 to 15 knots becoming east. waves 1 to
3 feet subsiding to 1 foot or less. 
.sunday night...southeast winds 5 to 10 knots becoming south.
waves 1 foot or less. 
.monday...southwest winds 5 to 15 knots increasing to 15 to
20 knots. showers likely with a chance of thunderstorms monday
night. waves 1 foot or less building to 1 to 3 feet. 
.tuesday...southwest winds 15 to 20 knots becoming northwest.
showers likely with a chance of thunderstorms during the day,
then a chance of showers tuesday night. waves 2 to 4 feet. 
.wednesday...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 171956
glfle 
expires:202607180215;;136829

open lake forecast for lake erie
national weather service cleveland oh
356 pm edt fri jul 17 2026

for waters beyond five nautical miles of shore on lake erie

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 29.60 inches will move into the northern great lakes 
tonight and will reach new england by saturday evening while 
deepening to 29.50 inches. this will lift a warm front across lake 
erie tonight before a strong cold front drops across the lake 
saturday night. high pressure 30.00 inches will build across the 
great lakes sunday and monday before another cold front crosses 
tuesday. a trough averaging 29.80 inches will linger over lake erie 
wednesday.


lez164-165-180215-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
356 pm edt fri jul 17 2026

.tonight...east winds 5 to 15 knots becoming southwest 15 to
20 knots. smoke through the early overnight. a chance of showers
and thunderstorms late this evening. a chance of showers with a
slight chance of thunderstorms after midnight. waves 1 to 3 feet.
.saturday...southwest winds 15 to 20 knots becoming west. a
chance of showers with a slight chance of thunderstorms in the
morning, then showers and thunderstorms in the afternoon. waves
2 to 4 feet building to 3 to 5 feet. 
.saturday night...northwest winds 15 to 20 knots becoming
northeast. showers and thunderstorms in the evening. waves 2 to
4 feet building to 3 to 5 feet. 
.sunday...northeast winds 5 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 2 feet. 
.sunday night...east winds 5 to 10 knots becoming south. waves
1 foot or less. 
.monday...south winds 5 to 15 knots becoming southwest 15 to
20 knots. showers likely with a chance of thunderstorms monday
night. waves 1 foot or less building to 3 to 5 feet. 
.tuesday...southwest winds 15 to 25 knots becoming northwest.
showers with a chance of thunderstorms during the day, then a
chance of showers tuesday night. waves 3 to 5 feet. 
.wednesday...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 172000
glfsc 
expires:202607180400;;136957

lake st clair forecast
national weather service detroit/pontiac mi
400 pm edt fri jul 17 2026

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...canadian wildfire smoke persists until the overnight
hours as weak low pressure systems approach the region bringing
some showers and thunderstorms. this will be followed by a
secondary low on saturday tracking across the straits into
northern lake huron with additional unsettled weather.


lcz460-180400-
lake st clair-
400 pm edt fri jul 17 2026

...dense smoke advisory in effect until 10 pm edt this evening...

.tonight...south winds 10 to 15 knots veering to the southwest early
in the morning. mostly clear becoming mostly cloudy late this
evening becoming partly cloudy. smoke. waves 2 feet or less.
.saturday...southwest winds 10 to 15 knots becoming west 15 to 20
knots in the afternoon. partly sunny. a chance of thunderstorms
early in the afternoon. showers likely and a chance of thunderstorms
late in the afternoon. waves 1 to 3 feet.
.saturday night...north winds 20 to 25 knots diminishing to 15 to 20
knots in the late evening and overnight. mostly clear. a chance of
showers and thunderstorms early in the evening. patchy smoke after
midnight. waves 1 to 3 feet.
.sunday...north winds 10 to 15 knots becoming northeast 5 to 10
knots in the late morning and afternoon. mostly sunny. patchy smoke
early in the morning. waves 2 feet or less.
.sunday night...east winds 5 to 10 knots veering to the south after
midnight. mostly clear. waves 2 feet or less.
.monday...southwest winds 5 to 10 knots becoming south 15 to 20
knots. partly sunny...then partly cloudy with a chance of showers
and thunderstorms in the evening. waves 2 feet or less.
.tuesday...northwest winds 20 to 25 knots. showers and a chance of
thunderstorms. waves 1 to 3 feet.
.wednesday...northwest winds 20 to 25 knots. mostly clear. waves 2
to 4 feet.

$$

fzus63 kdtx 171957
glflh 
expires:202607180400;;136861

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 pm edt fri jul 17 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...canadian wildfire smoke persists until the overnight
hours as weak low pressure systems approach the region bringing 
some showers and thunderstorms. this will be followed by a 
secondary low on saturday tracking across the straits into 
northern lake huron with additional unsettled weather.


lhz462>464-180400-
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-
357 pm edt fri jul 17 2026

...dense smoke advisory in effect until 10 pm edt this evening...

.tonight...southeast winds 5 to 10 knots becoming south 10 to
15 knots in the late evening and overnight. smoke. waves 1 to
3 feet building to 2 to 4 feet after midnight. 
.saturday...southwest winds 10 to 15 knots increasing to 15 to
20 knots late in the morning...then becoming west 10 to 15 knots
early in the afternoon becoming northwest 15 to 20 knots with
gusts to around 30 knots late in the afternoon. a chance of
thunderstorms in the morning...then a chance of showers and
thunderstorms in the afternoon. patchy smoke in the afternoon.
waves 3 to 5 feet. 
.saturday night...north winds 20 to 25 knots with gusts to around
30 knots decreasing to 10 to 15 knots. patchy smoke. waves 6 to
9 feet. waves occasionally around 12 feet. 
.sunday...north winds 10 to 15 knots decreasing to 5 to 10 knots
in the late morning and afternoon. waves 3 to 5 feet subsiding to
1 to 3 feet early in the afternoon. 
.sunday night...light and variable winds becoming southeast 5 to
10 knots by midnight...then veering to the south after midnight.
waves 2 feet or less. 
.monday...south winds 10 to 15 knots increasing to 15 to 20 knots
with gusts to around 30 knots late in the afternoon. showers late
in the afternoon. waves 1 to 3 feet building to 3 to 5 feet. 
.tuesday...southwest winds 15 to 20 knots decreasing to 10 to
15 knots in the late morning and early afternoon...then becoming
northwest 15 to 20 knots with gusts to 35 knot gales early in the
evening increasing to 20 to 25 knots with gusts to 35 knot gales
by midnight. showers early in the morning. a chance of
thunderstorms. a chance of showers . waves 3 to 5 feet building
to 8 to 12 feet . waves occasionally around 15 feet. 
.wednesday...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots with gusts to around
30 knots . a chance of showers early in the morning. waves 6 to
9 feet. waves occasionally around 11 feet. 


$$

fzus63 kdtx 171957
glflh 
expires:202607180400;;136860

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 pm edt fri jul 17 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...canadian wildfire smoke persists until the overnight
hours as weak low pressure systems approach the region bringing 
some showers and thunderstorms. this will be followed by a 
secondary low on saturday tracking across the straits into 
northern lake huron with additional unsettled weather.


lhz362-363-180400-
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-
357 pm edt fri jul 17 2026

...dense smoke advisory in effect until 10 pm edt this evening...

.tonight...southeast winds 10 to 15 knots becoming south 15 to
20 knots early in the morning. smoke. a chance of showers after
midnight. waves 1 to 3 feet building to 3 to 5 feet after
midnight. 
.saturday...southwest winds 15 to 20 knots decreasing to 10 to
15 knots late in the morning...then becoming west 15 to 20 knots
with gusts to around 30 knots early in the afternoon becoming
northwest 20 to 25 knots with gusts to around 30 knots late in
the afternoon. a chance of showers in the morning. areas of smoke
in the morning...then patchy smoke in the afternoon. waves 4 to
6 feet building to 6 to 9 feet in the afternoon. waves
occasionally around 12 feet. 
.saturday night...northwest winds 20 to 25 knots with gusts to
around 30 knots becoming northwest 20 to 25 knots. patchy smoke.
waves 5 to 7 feet. waves occasionally around 10 feet. 
.sunday...north winds 5 to 10 knots early in the morning becoming
light and variable. waves 2 to 4 feet subsiding to 1 to 3 feet in
the late morning and afternoon. 
.sunday night...east winds 5 to 10 knots veering to the southeast
by midnight...then becoming south 10 to 15 knots after midnight.
waves 2 feet or less. 
.monday...south winds 10 to 15 knots becoming southwest 15 to
20 knots with gusts to around 30 knots late in the morning...then
becoming south 20 to 25 knots with gusts to around 30 knots late
in the afternoon decreasing to 15 to 20 knots with gusts to
around 30 knots late in the evening. a chance of showers late in
the morning. rain showers late in the afternoon. waves 2 to
4 feet building to 6 to 9 feet. waves occasionally around
12 feet. 
.tuesday...southwest winds 15 to 20 knots with gusts to around
30 knots decreasing to 10 to 15 knots in the late morning and
early afternoon...then becoming northwest 20 to 25 knots with
gusts to 40 knot gales early in the evening increasing to
30 knots with gusts to 35 knot gales by midnight. a chance of
showers. waves 8 to 12 feet building to 10 to 14 feet . waves
occasionally around 18 feet. 
.wednesday...northwest winds to 30 knots with gusts to 35 knot
gales decreasing to 15 to 20 knots. a chance of showers early in
the morning. waves 8 to 12 feet. waves occasionally around
15 feet. 


$$

fzus63 kdtx 171957
glflh 
expires:202607180400;;136859

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 pm edt fri jul 17 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...canadian wildfire smoke persists until the overnight
hours as weak low pressure systems approach the region bringing 
some showers and thunderstorms. this will be followed by a 
secondary low on saturday tracking across the straits into 
northern lake huron with additional unsettled weather.


lhz361-180400-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
357 pm edt fri jul 17 2026

.tonight...southeast winds 10 to 15 knots veering to the south
early in the morning. a chance of showers in the evening...then
showers likely and a chance of thunderstorms after midnight.
smoke. waves 1 to 3 feet building to 3 to 5 feet early in the
morning. 
.saturday...southwest winds 15 to 20 knots with gusts to around
30 knots veering to the northwest with gusts to around 30 knots
in the afternoon. a chance of showers in the morning. areas of
smoke. waves 4 to 6 feet. 
.saturday night...northwest winds 15 to 20 knots with gusts to
around 30 knots becoming north 5 to 10 knots. smoke in the
evening. patchy smoke after midnight. waves 4 to 6 feet subsiding
to 2 to 4 feet after midnight. waves occasionally around 8 feet. 
.sunday...light and variable winds. waves 2 feet or less. 
.sunday night...south winds 5 to 10 knots increasing to 10 to
15 knots after midnight. waves 2 feet or less. 
.monday...south winds 10 to 15 knots becoming southwest 15 to
20 knots late in the evening. showers likely late in the morning.
a chance of thunderstorms. rain showers late in the afternoon.
waves 2 to 4 feet building to 4 to 6 feet late in the afternoon.
waves occasionally around 8 feet. 
.tuesday...southwest winds 15 to 20 knots becoming northwest
20 to 25 knots in the late morning and early afternoon...then
increasing to 30 knots . gusts to 35 knot gales. a chance of
showers. waves 8 to 12 feet building to 10 to 14 feet . waves
occasionally around 18 feet. 
.wednesday...northwest winds to 30 knots decreasing to 15 to
20 knots. gusts to 35 knot gales. waves 8 to 12 feet. waves
occasionally around 15 feet. 


$$

fzus63 kmkx 172006
glflm 
expires:202607180330;;137504

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
306 pm cdt fri jul 17 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...

wildfire smoke from northern minnesota and northwestern ontario 
will continue across all of the open waters of lake michigan into 
early this evening. it will linger over the northern half of the 
open waters until 1 am cdt saturday. the dense smoke reduce 
visibility to 1 nautical mile or less at times. thus, the marine 
dense smoke advisory continues until early this evening for the 
southern half of lake michigan, and until 1 am cdt saturday for 
the northern half. 

southerly winds continue through tonight, as low pressure around 
29.6 inches moves east across lake superior. this low pressure 
system is expected to drag a cold front southward across the lake 
on saturday, with the front pushing south of the lake by saturday 
night. breezy southerly winds are expected ahead of the front, 
with the strongest winds expected over the northern end of lake 
michigan. winds then quickly veer northwesterly and northerly 
following the frontal passage on saturday. north gusts may 
approach 30 knots, particularly over the southern half of the 
lake. 

winds then quickly taper saturday night, as high pressure around 
30.1 inches moves over the northern great lakes. northeast to 
light and variable winds are then expected through sunday into 
sunday night. gusty south to southwest winds may then develop 
monday into monday night, with gusty west to northwest winds 
possible into the middle of next week.


lmz261-362-364-366-563-565-567-868-180330-
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-
306 pm cdt fri jul 17 2026

sheboygan wi to pentwater mi north...

...dense smoke advisory in effect until 10 pm cdt this evening...

.tonight...south winds 15 to 25 kt becoming southwest to 30 kt.
areas of smoke this evening, then patchy smoke overnight. chance
of showers and thunderstorms this evening, then chance of showers
and slight chance of thunderstorms overnight. waves 1 to 3 ft
building to 3 to 5 ft. 
.saturday...west winds 15 to 25 kt becoming north to 30 kt.
patchy smoke in the morning, then areas of smoke in the
afternoon. waves 4 to 6 ft occasionally to 8 ft. 
.saturday night...north winds to 30 kt becoming northeast 10 to
15 kt. smoke in the evening. waves 4 to 6 ft occasionally to 8 ft
subsiding to 2 to 4 ft. 
.sunday...northeast winds 5 to 10 kt veering to southwest 10 to
20 kt in the afternoon. waves 1 to 3 ft. 
.sunday night...south winds 10 to 20 kt becoming southwest 15 to
25 kt. waves 1 to 2 ft building to 2 to 4 ft. 
.monday...southwest gales to 35 kt increasing to gales to 40 kt.
showers likely in the morning, then showers likely with a chance
of thunderstorms in the afternoon. waves 4 to 6 ft occasionally
to 8 ft building to 6 to 9 ft occasionally to 12 ft. 
.monday night...southwest gales to 35 kt becoming west to 30 kt.
chance of showers. waves 6 to 9 ft occasionally to 12 ft. 
.tuesday...northwest winds to 30 kt increasing to gales to 40 kt.
waves 4 to 7 ft occasionally to 9 ft building to 5 to 8 ft
occasionally to 10 ft. 
.wednesday...northwest gales to 35 kt. waves 8 to 11 ft
occasionally to 14 ft subsiding to 6 to 9 ft occasionally to
12 ft.  

$$

fzus63 kmkx 172006
glflm 
expires:202607180330;;137505

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
306 pm cdt fri jul 17 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...

wildfire smoke from northern minnesota and northwestern ontario 
will continue across all of the open waters of lake michigan into 
early this evening. it will linger over the northern half of the 
open waters until 1 am cdt saturday. the dense smoke reduce 
visibility to 1 nautical mile or less at times. thus, the marine 
dense smoke advisory continues until early this evening for the 
southern half of lake michigan, and until 1 am cdt saturday for 
the northern half. 

southerly winds continue through tonight, as low pressure around 
29.6 inches moves east across lake superior. this low pressure 
system is expected to drag a cold front southward across the lake 
on saturday, with the front pushing south of the lake by saturday 
night. breezy southerly winds are expected ahead of the front, 
with the strongest winds expected over the northern end of lake 
michigan. winds then quickly veer northwesterly and northerly 
following the frontal passage on saturday. north gusts may 
approach 30 knots, particularly over the southern half of the 
lake. 

winds then quickly taper saturday night, as high pressure around 
30.1 inches moves over the northern great lakes. northeast to 
light and variable winds are then expected through sunday into 
sunday night. gusty south to southwest winds may then develop 
monday into monday night, with gusty west to northwest winds 
possible into the middle of next week.


lmz080-669-671-673-675-777-779-870-872-874-876-878-180330-
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-
306 pm cdt fri jul 17 2026

sheboygan wi to pentwater mi south...

...dense smoke advisory in effect until 7 pm cdt this evening...

.tonight...south winds 10 to 20 kt becoming southwest 15 to
25 kt. areas of smoke this evening. slight chance of
thunderstorms with isolated showers this evening. waves 2 to
4 ft. 
.saturday...west winds 15 to 25 kt veering to north to 30 kt.
chance of showers and slight chance of thunderstorms in the
morning, then chance of showers and thunderstorms in the
afternoon. patchy smoke in the afternoon. waves 3 to 5 ft
building to 4 to 7 ft occasionally to 9 ft. 
.saturday night...north winds to 30 kt becoming northeast 10 to
20 kt. patchy smoke in the evening. waves 4 to 7 ft occasionally
to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft. 
.sunday...northeast winds 10 to 15 kt becoming north 10 to 20 kt.
waves 3 to 5 ft subsiding to 1 to 3 ft. 
.sunday night...southeast winds 10 to 15 kt becoming south 10 to
20 kt. waves 1 to 2 ft building to 1 to 3 ft. 
.monday...south winds to 30 kt increasing to gales to 35 kt.
chance of showers in the morning, then chance of showers and
thunderstorms in the afternoon. waves 4 to 6 ft occasionally to
8 ft building to 5 to 8 ft occasionally to 10 ft. 
.monday night...southwest gales to 35 kt diminishing to 30 kt.
showers likely with a chance of thunderstorms. waves 5 to 8 ft
occasionally to 10 ft. 
.tuesday...west winds to 30 kt becoming northwest gales to 35 kt.
waves 4 to 7 ft occasionally to 9 ft building to 5 to 8 ft
occasionally to 10 ft. 
.wednesday...northwest gales to 35 kt becoming north. waves 8 to
12 ft occasionally to 16 ft.  

$$

fzus63 kmqt 172001
glfls 
expires:202607180800;;137067

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 17 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 29.7 inch low crosses lake superior tonight and moves to southern 
quebec by saturday afternoon. weak ridging of around 30.0 inches 
returns to the great lakes late saturday and persists through 
sunday. a strong low ranging from 29.1 to 29.4 inches over northern 
ontario looks to bring troughing of around 29.5 inches over lake 
superior on monday.




lsz267-180800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt fri jul 17 2026

...dense smoke advisory in effect until 6 am edt saturday...

.late this afternoon...southeast winds 10 to 20 knots. smoke. a
chance of showers and a slight chance of thunderstorms. waves
calm to 2 feet. 
.tonight...south winds 15 to 25 knots veering west late. smoke.
showers through midnight. a chance of thunderstorms. a chance of
showers after midnight. waves building to 2 to 4 feet. 
.saturday...northwest winds 15 to 25 knots. smoke. waves building
to 3 to 5 feet occasionally to 7 feet. 
.saturday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight, then backing west late. smoke
through midnight, then patchy smoke after midnight. waves
subsiding to calm to 2 feet. 
.sunday...south winds 5 to 15 knots backing southeast by mid
afternoon. patchy smoke through early afternoon. waves calm to
2 feet. 
.sunday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 2 to 4 feet. 
.monday...south winds 15 to 25 knots. a chance of showers through
early afternoon. a chance of thunderstorms. showers by mid
afternoon. waves 2 to 4 feet. 
.monday night...southwest winds 15 to 25 knots veering west after
midnight. showers likely and a chance of thunderstorms through
midnight, then a chance of showers after midnight. waves building
to 3 to 5 feet occasionally to 7 feet. 
.tuesday...northwest gales to 35 knots. waves building to 7 to
10 feet occasionally to 13 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.wednesday...northwest winds 20 to 30 knots becoming west 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 172001
glfls 
expires:202607180800;;137062

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 17 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 29.7 inch low crosses lake superior tonight and moves to southern 
quebec by saturday afternoon. weak ridging of around 30.0 inches 
returns to the great lakes late saturday and persists through 
sunday. a strong low ranging from 29.1 to 29.4 inches over northern 
ontario looks to bring troughing of around 29.5 inches over lake 
superior on monday.




lsz162-180800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt fri jul 17 2026 /301 pm cdt fri jul 17 2026/

...dense smoke advisory in effect until 6 am edt /5 am cdt/
saturday...

.late this afternoon...east winds 5 to 15 knots. areas of smoke.
a chance of showers and a slight chance of thunderstorms. waves
calm to 2 feet. 
.tonight...southwest winds 10 to 20 knots veering west after
midnight. a slight chance of showers and thunderstorms through
midnight. areas of smoke. waves calm to 2 feet. 
.saturday...northwest winds 5 to 15 knots backing southwest in
the afternoon. patchy smoke. waves calm to 2 feet. 
.saturday night...southwest winds 5 to 15 knots veering north
after midnight, then becoming northeast less than 10 knots late.
smoke. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots. smoke through early
afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight. a chance of thunderstorms. showers
likely after midnight. waves calm to 2 feet. 
.monday...southwest winds 15 to 25 knots becoming west 20 to
30 knots by mid afternoon. a chance of showers. waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.monday night...west winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. a chance of showers. waves subsiding to
1 to 3 feet, then building to 2 to 4 feet. 
.tuesday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots veering west. waves
calm to 2 feet. 

$$

fzus63 kmqt 172001
glfls 
expires:202607180800;;137063

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 17 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 29.7 inch low crosses lake superior tonight and moves to southern 
quebec by saturday afternoon. weak ridging of around 30.0 inches 
returns to the great lakes late saturday and persists through 
sunday. a strong low ranging from 29.1 to 29.4 inches over northern 
ontario looks to bring troughing of around 29.5 inches over lake 
superior on monday.




lsz263-180800-
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 fri jul 17 2026

...dense smoke advisory in effect until 6 am edt saturday...

.late this afternoon...east winds 5 to 15 knots. smoke. a chance
of showers and a slight chance of thunderstorms. waves calm to
2 feet. 
.tonight...west winds 5 to 15 knots. a chance of showers and
thunderstorms through midnight. smoke. waves building to 1 to
3 feet. 
.saturday...northwest winds 5 to 15 knots backing southwest late.
patchy smoke. waves subsiding to calm to 2 feet. 
.saturday night...west winds 5 to 15 knots backing southeast
after midnight, then veering south late. areas of smoke. waves
calm to 2 feet. 
.sunday...south winds 5 to 15 knots. smoke through early
afternoon. waves calm to 2 feet. 
.sunday night...south winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. a chance of showers. waves
building to 2 to 4 feet. 
.monday...southwest winds 20 to 30 knots. a chance of showers
through early afternoon. showers likely by mid afternoon. waves
building to 3 to 5 feet occasionally to 7 feet. 
.monday night...west winds 15 to 25 knots increasing to 20 to
30 knots after midnight. a chance of showers. waves subsiding to
2 to 4 feet, then building to 3 to 6 feet occasionally to 8 feet.
.tuesday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. waves subsiding to 1 to 3 feet. 
.wednesday...northwest winds 10 to 20 knots becoming west 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 172001
glfls 
expires:202607180800;;137065

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 17 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 29.7 inch low crosses lake superior tonight and moves to southern 
quebec by saturday afternoon. weak ridging of around 30.0 inches 
returns to the great lakes late saturday and persists through 
sunday. a strong low ranging from 29.1 to 29.4 inches over northern 
ontario looks to bring troughing of around 29.5 inches over lake 
superior on monday.




lsz265-180800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt fri jul 17 2026

...dense smoke advisory in effect until 6 am edt saturday...

.late this afternoon...southeast winds 10 to 20 knots. smoke. a
chance of showers and a slight chance of thunderstorms. waves
1 to 3 feet. 
.tonight...south winds 10 to 20 knots becoming west 15 to
25 knots after midnight, then increasing to 20 to 30 knots late.
a chance of showers and thunderstorms through midnight. smoke.
waves building to 2 to 4 feet. 
.saturday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. smoke. waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 1 to 3 feet. 
.saturday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight, then backing south late. areas of
smoke. waves subsiding to calm to 2 feet. 
.sunday...south winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. areas of smoke through early
afternoon. waves calm to 2 feet. 
.sunday night...south winds 10 to 20 knots becoming southwest
20 to 30 knots after midnight. a chance of showers after
midnight. waves building to 1 to 3 feet. 
.monday...southwest winds 20 to 30 knots. showers likely and a
chance of thunderstorms. waves building to 2 to 4 feet. 
.monday night...west winds 20 to 30 knots increasing to gales to
35 knots after midnight. a chance of showers. waves building to
4 to 7 feet occasionally to 9 feet. 
.tuesday...northwest gales to 45 knots. waves building to 7 to
10 feet occasionally to 13 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.wednesday...northwest gales to 35 knots becoming west 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 172001
glfls 
expires:202607180800;;137064

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 17 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 29.7 inch low crosses lake superior tonight and moves to southern 
quebec by saturday afternoon. weak ridging of around 30.0 inches 
returns to the great lakes late saturday and persists through 
sunday. a strong low ranging from 29.1 to 29.4 inches over northern 
ontario looks to bring troughing of around 29.5 inches over lake 
superior on monday.




lsz264-180800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt fri jul 17 2026

...dense smoke advisory in effect until 6 am edt saturday...

.late this afternoon...southeast winds 5 to 15 knots. smoke. a
chance of showers and thunderstorms. waves 1 to 3 feet. 
.tonight...southeast winds 5 to 15 knots veering west after
midnight, then becoming northwest 10 to 20 knots late. a chance
of showers and thunderstorms through midnight. smoke. waves
building to 2 to 4 feet. 
.saturday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing west late. smoke. waves
subsiding to calm to 2 feet. 
.saturday night...west winds 5 to 15 knots backing south late.
areas of smoke. waves calm to 2 feet. 
.sunday...south winds 5 to 15 knots. areas of smoke through early
afternoon. waves calm to 2 feet. 
.sunday night...south winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. a chance of showers. waves
building to 2 to 4 feet. 
.monday...southwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. showers likely and a chance of
thunderstorms. waves building to 3 to 5 feet occasionally to
7 feet. 
.monday night...west winds 15 to 25 knots increasing to 20 to
30 knots after midnight. a chance of showers. waves subsiding to
2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet.
.tuesday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 2 to 4 feet. 
.wednesday...northwest winds 10 to 20 knots becoming west 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 172001
glfls 
expires:202607180800;;137066

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 17 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 29.7 inch low crosses lake superior tonight and moves to southern 
quebec by saturday afternoon. weak ridging of around 30.0 inches 
returns to the great lakes late saturday and persists through 
sunday. a strong low ranging from 29.1 to 29.4 inches over northern 
ontario looks to bring troughing of around 29.5 inches over lake 
superior on monday.




lsz266-180800-
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 fri jul 17 2026

...dense smoke advisory in effect until 6 am edt saturday...

.late this afternoon...southeast winds 15 to 25 knots. smoke. a
chance of showers and a slight chance of thunderstorms. waves
1 to 3 feet. 
.tonight...south winds 10 to 20 knots veering west after
midnight, then becoming northwest 15 to 25 knots late. smoke.
showers likely and a chance of thunderstorms through midnight. a
slight chance of showers after midnight. waves building to 2 to
4 feet. 
.saturday...northwest winds 15 to 25 knots. smoke. waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.saturday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight, then veering south late. smoke.
waves subsiding to calm to 2 feet. 
.sunday...south winds 5 to 15 knots. areas of smoke through early
afternoon. waves calm to 2 feet. 
.sunday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. a chance of showers after midnight.
waves building to 2 to 4 feet. 
.monday...south winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. showers and a chance of thunderstorms.
waves building to 3 to 5 feet occasionally to 7 feet. 
.monday night...west winds 15 to 25 knots increasing to gales to
35 knots after midnight. showers likely through midnight. waves
subsiding to 2 to 4 feet, then building to 4 to 7 feet
occasionally to 9 feet. 
.tuesday...northwest gales to 40 knots. waves building to 9 to
12 feet occasionally to 15 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet. 
.wednesday...northwest gales to 35 knots becoming west 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$