fzus61 kbuf 180803
glflo 
expires:202607181500;;165130

open lake forecast for lake ontario
national weather service buffalo ny
403 am edt sat jul 18 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>065-181500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 am edt sat jul 18 2026

.today...south winds 15 to 20 knots becoming southwest. showers
likely early, then showers with a chance of thunderstorms from
late morning on. areas of smoke. some thunderstorms may produce
gusty winds this afternoon. waves 1 to 3 feet building to 3 to
5 feet. 
.tonight...west winds 15 to 20 knots becoming north. a chance of
showers and thunderstorms early. some thunderstorms may produce
gusty winds early. waves 3 to 6 feet. 
.sunday...north winds 15 to 20 knots becoming west 5 to 15 knots.
waves 2 to 4 feet subsiding to 1 to 2 feet. 
.sunday night...west winds 5 to 15 knots. waves 1 to 2 feet. 
.monday...southwest winds 5 to 15 knots becoming south and
increasing to 15 to 25 knots. a chance of showers monday night.
waves 1 foot or less building to 3 to 5 feet. 
.tuesday...south winds 15 to 25 knots becoming west. showers with
a chance of thunderstorms. waves 3 to 6 feet subsiding to 3 to
5 feet. 
.wednesday...west winds 15 to 20 knots. a chance of showers and
thunderstorms. waves 3 to 6 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 180803
glflo 
expires:202607181500;;165129

open lake forecast for lake ontario
national weather service buffalo ny
403 am edt sat jul 18 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.


loz062-181500-
lake ontario open waters from the niagara river to hamlin beach-
403 am edt sat jul 18 2026

.today...southwest winds 15 to 20 knots. patchy smoke early. a
chance of showers and thunderstorms this morning, then showers
with a chance of thunderstorms this afternoon. some thunderstorms
may produce gusty winds this afternoon. waves 1 to 3 feet
building to 3 to 5 feet. 
.tonight...west winds 15 to 20 knots becoming north 10 to
15 knots. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.sunday...north winds 5 to 15 knots becoming west. waves 1 to
3 feet subsiding to 1 foot or less. 
.sunday night...west winds 10 knots or less. waves 1 foot or
less. 
.monday...southwest winds 10 knots or less becoming south 10 to
15 knots. a chance of showers monday night. waves 2 feet or less.
.tuesday...south winds 15 to 20 knots becoming west. showers with
a chance of thunderstorms. waves 2 to 4 feet. 
.wednesday...west winds 15 to 20 knots becoming northwest. a
chance of showers. waves 3 to 5 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 180800
glfle 
expires:202607181400;;164982

open lake forecast for lake erie
national weather service cleveland oh
400 am edt sat jul 18 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 29.70 inches enters the region as a cold front moves 
southeast across lake erie into tonight. as the cold front 
exits, high pressure 30.00 inches will briefly enter the region 
sunday and monday. a warm front will lift into the region 
monday and will be quickly followed by another cold front on
tuesday. a trough averaging 29.80 inches will linger across the 
eastern great lakes on wednesday.


lez162-163-181400-
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-
400 am edt sat jul 18 2026

.today...southwest winds 15 to 20 knots becoming west. a chance
of showers and thunderstorms early this afternoon. showers likely
with a chance of thunderstorms late. waves 1 to 3 feet. 
.tonight...northwest winds 15 to 20 knots becoming north. a
chance of showers and thunderstorms early. 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...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 monday night. waves 1 to 3 feet. 
.tuesday...southwest winds 15 to 20 knots becoming northwest.
showers likely with a chance of thunderstorms during the day.
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 180800
glfle 
expires:202607181400;;164984

open lake forecast for lake erie
national weather service cleveland oh
400 am edt sat jul 18 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 29.70 inches enters the region as a cold front moves 
southeast across lake erie into tonight. as the cold front 
exits, high pressure 30.00 inches will briefly enter the region 
sunday and monday. a warm front will lift into the region 
monday and will be quickly followed by another cold front on
tuesday. a trough averaging 29.80 inches will linger across the 
eastern great lakes on wednesday.


lez061-166>169-181400-
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-
400 am edt sat jul 18 2026

.today...southwest winds 15 to 25 knots becoming west. smoke
early. a chance of showers and thunderstorms this morning, then
showers with a chance of thunderstorms this afternoon. waves 3 to
6 feet building to 4 to 7 feet. waves occasionally around 9 feet.
.tonight...northwest winds 15 to 20 knots becoming north. a
chance of showers and thunderstorms early. 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 southwest.
waves 1 foot or less. 
.monday...southwest winds 10 knots or less becoming south and
increasing to 15 to 20 knots. showers likely 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 and thunderstorms tuesday night. waves 4 to
7 feet subsiding to 3 to 6 feet. waves occasionally around
9 feet. 
.wednesday...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 180800
glfle 
expires:202607181400;;164983

open lake forecast for lake erie
national weather service cleveland oh
400 am edt sat jul 18 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 29.70 inches enters the region as a cold front moves 
southeast across lake erie into tonight. as the cold front 
exits, high pressure 30.00 inches will briefly enter the region 
sunday and monday. a warm front will lift into the region 
monday and will be quickly followed by another cold front on
tuesday. a trough averaging 29.80 inches will linger across the 
eastern great lakes on wednesday.


lez164-165-181400-
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-
400 am edt sat jul 18 2026

.today...southwest winds 15 to 20 knots becoming west. a chance
of showers with a slight chance of thunderstorms early. a chance
of showers and thunderstorms early this afternoon, then showers
with a chance of thunderstorms late. waves 2 to 4 feet building
to 3 to 5 feet. 
.tonight...northwest winds 15 to 20 knots becoming northeast.
showers likely with a chance of thunderstorms early, then a
chance of showers with a slight chance of thunderstorms late in
the evening. waves 3 to 5 feet. 
.sunday...northeast winds 5 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 2 feet. 
.sunday night...northeast winds 5 to 10 knots becoming southeast.
waves 1 foot or less. 
.monday...south winds 10 knots or less becoming southwest and
increasing to 15 to 20 knots. showers likely monday night. waves
2 feet or less building to 2 to 4 feet. 
.tuesday...southwest winds 15 to 25 knots becoming northwest.
showers likely 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 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 180752
glfsc 
expires:202607181600;;164785

lake st clair forecast
national weather service detroit/pontiac mi
352 am edt sat jul 18 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...will get a brief break from canadian wildfire smoke as
southwestly flow pushes it northeast out of the area. a low
pressure system tracking through the northern lakes region today
will drop a cold front through the eastern lakes which will bring
some showers and thunderstorms this morning and afternoon. high
pressure will then build into the region for sunday.


lcz460-181600-
lake st clair-
352 am edt sat jul 18 2026

.today...west winds 15 to 20 knots. partly sunny. a chance of
showers and thunderstorms early in the afternoon. showers likely and
a chance of thunderstorms late in the afternoon. waves 1 to 3 feet.
.tonight...north winds 15 to 20 knots diminishing to 10 to 15 knots
early in the morning. partly cloudy in the evening then clearing.
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 becoming light and
variable. mostly clear. waves 2 feet or less.
.monday...south winds 5 to 10 knots increasing to 15 to 20 knots.
mostly sunny...then mostly cloudy with a chance of light showers in
the evening. waves 2 feet or less.
.tuesday...northwest winds 15 to 20 knots. showers and a chance of
thunderstorms. waves 1 to 3 feet.
.wednesday...northwest winds 20 to 25 knots. mostly clear. waves 1
to 3 feet.

$$

fzus63 kdtx 180750
glflh 
expires:202607181600;;164734

open lake forecast for lake huron
national weather service detroit/pontiac mi
350 am edt sat jul 18 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...will get a brief break from canadian wildfire smoke as
southwestly flow pushes it northeast out of the area. a low
pressure system tracking through the northern lakes region today
will drop a cold front through the eastern lakes which will bring
some showers and thunderstorms this morning and afternoon. high
pressure will then build into the region for sunday.


lhz361-181600-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
350 am edt sat jul 18 2026

.today...west winds 15 to 20 knots with gusts to around 30 knots
becoming northwest 20 to 25 knots with gusts to around 30 knots
early in the afternoon...then decreasing to 15 to 20 knots with
gusts to around 30 knots late in the afternoon. areas of smoke.
waves 3 to 5 feet building to 5 to 7 feet in the afternoon. waves
occasionally around 10 feet. 
.tonight...northwest winds 15 to 20 knots becoming 5 to 10 knots
early in the morning. smoke in the evening. patchy smoke after
midnight. waves 3 to 5 feet subsiding to 1 to 3 feet early in the
morning. 
.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 increasing 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 and a chance of
thunderstorms late in the afternoon. waves 2 to 4 feet building
to 3 to 5 feet. 
.tuesday...west winds 15 to 20 knots increasing to 20 to 25 knots
with gusts to 35 knot gales in the late morning and early
afternoon...then becoming northwest to 30 knots with gusts to
35 knot gales . a chance of showers. waves 6 to 9 feet building
to 8 to 12 feet . waves occasionally around 15 feet. 
.wednesday...northwest winds to 30 knots decreasing to 15 to
20 knots. gusts to 35 knot gales. waves 6 to 9 feet. waves
occasionally around 12 feet. 


$$

fzus63 kdtx 180750
glflh 
expires:202607181600;;164736

open lake forecast for lake huron
national weather service detroit/pontiac mi
350 am edt sat jul 18 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...will get a brief break from canadian wildfire smoke as
southwestly flow pushes it northeast out of the area. a low
pressure system tracking through the northern lakes region today
will drop a cold front through the eastern lakes which will bring
some showers and thunderstorms this morning and afternoon. high
pressure will then build into the region for sunday.


lhz462>464-181600-
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-
350 am edt sat jul 18 2026

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


$$

fzus63 kdtx 180750
glflh 
expires:202607181600;;164735

open lake forecast for lake huron
national weather service detroit/pontiac mi
350 am edt sat jul 18 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...will get a brief break from canadian wildfire smoke as
southwestly flow pushes it northeast out of the area. a low
pressure system tracking through the northern lakes region today
will drop a cold front through the eastern lakes which will bring
some showers and thunderstorms this morning and afternoon. high
pressure will then build into the region for sunday.


lhz362-363-181600-
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-
350 am edt sat jul 18 2026

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


$$

fzus63 kmkx 180850
glflm 
expires:202607181515;;167197

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
350 am cdt sat jul 18 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...

areas of smoke will continue over the north half of the lake
tonight. otherwise breezy southwest to west winds will develop
ahead of a cold front. the low pressure area around 29.7 inches
will track from just north of lake superior early this morning.
then continues across southern quebec this afternoon and deepen 
to 29.4 inches. its trailing cold front will track from northern 
lake michigan saturday morning to far southern lake michigan by 
early afternoon. smoke will return to lake michigan behind the 
cold front and may become dense once again. wildfire smoke is
expected to reduce visilibites to 1 nm at times, thus a marine
dense smoke advisory is in effect across the lake. breezy 
northerly winds are forecast behind the cold front and will linger
into this evening.

winds then quickly taper tonight, 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.


lmz261-362-364-366-563-565-567-868-181515-
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-
350 am cdt sat jul 18 2026

sheboygan wi to pentwater mi north...

...dense smoke advisory in effect from 10 am this morning to 7 am
cdt monday...

.today...northwest winds 15 to 25 kt becoming north to 30 kt.
patchy smoke. waves 4 to 6 ft occasionally to 8 ft.
.tonight...north winds to 30 kt becoming northeast 10 to 15 kt.
smoke. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.sunday...northeast winds 5 to 10 kt becoming east late in the
morning, then veering to southwest early in the afternoon
becoming 10 to 20 kt late. areas of smoke. waves 1 to 3 ft
subsiding to 1 to 2 ft. 
.sunday night...south winds 10 to 20 kt becoming southwest 15 to
25 kt. areas of smoke in the evening. waves 1 to 2 ft building to
2 to 4 ft. 
.monday...southwest winds to 30 kt increasing to gales to 35 kt.
showers likely 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.
showers with a chance of thunderstorms. waves 6 to 9 ft
occasionally to 12 ft. 
.tuesday...northwest winds to 30 kt increasing to gales to 35 kt.
waves 5 to 8 ft occasionally to 10 ft. 
.wednesday...northwest gales to 35 kt becoming north. waves 7 to
10 ft occasionally to 13 ft subsiding to 6 to 9 ft occasionally
to 12 ft.  

$$

fzus63 kmkx 180850
glflm 
expires:202607181515;;167198

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
350 am cdt sat jul 18 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...

areas of smoke will continue over the north half of the lake
tonight. otherwise breezy southwest to west winds will develop
ahead of a cold front. the low pressure area around 29.7 inches
will track from just north of lake superior early this morning.
then continues across southern quebec this afternoon and deepen 
to 29.4 inches. its trailing cold front will track from northern 
lake michigan saturday morning to far southern lake michigan by 
early afternoon. smoke will return to lake michigan behind the 
cold front and may become dense once again. wildfire smoke is
expected to reduce visilibites to 1 nm at times, thus a marine
dense smoke advisory is in effect across the lake. breezy 
northerly winds are forecast behind the cold front and will linger
into this evening.

winds then quickly taper tonight, 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.


lmz080-669-671-673-675-777-779-870-872-874-876-878-181515-
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-
350 am cdt sat jul 18 2026

sheboygan wi to pentwater mi south...

...dense smoke advisory in effect from 3 pm this afternoon to
7 am cdt monday...

.today...west winds 15 to 25 kt veering to north to 30 kt. slight
chance of showers and thunderstorms this morning, then chance of
showers and slight chance of thunderstorms this afternoon. patchy
smoke this afternoon. waves 3 to 5 ft building to 4 to 6 ft
occasionally to 8 ft. 
.tonight...north winds to 30 kt becoming northeast 10 to 20 kt.
areas of smoke. 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 backing to northwest. areas
of smoke. waves 3 to 5 ft subsiding to 1 to 2 ft. 
.sunday night...southeast winds 10 to 15 kt becoming south 10 to
20 kt. areas of smoke in the evening. waves 1 to 3 ft.
.monday...south winds 15 to 25 kt increasing to 30 kt. chance of
showers in the afternoon. waves 3 to 5 ft building to 5 to 8 ft
occasionally to 10 ft. 
.monday night...southwest winds to 30 kt. showers likely with a
chance of thunderstorms. waves 6 to 9 ft occasionally to 12 ft. 
.tuesday...northwest winds to 30 kt increasing to gales to 35 kt.
waves 5 to 8 ft occasionally to 10 ft. 
.wednesday...north gales to 35 kt. waves 8 to 12 ft occasionally
to 16 ft subsiding to 8 to 11 ft occasionally to 14 ft.  

$$

fzus63 kmqt 180801
glfls 
expires:202607182000;;165002

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat jul 18 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 moves to afternoon. weak ridging of around 30.0 
inches returns to the great lakes this evening 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. then a 30.1 inch ridge descends southeast over 
the midwest tuesday through wednesday night. 




lsz266-182000-
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-
400 am edt sat jul 18 2026

...dense smoke advisory in effect until 6 am edt early this
morning...

.early this morning...northwest winds 20 to 30 knots. patchy
smoke. waves 2 to 4 feet. 
.today...northwest winds 15 to 25 knots. patchy smoke through
early afternoon, then smoke by mid afternoon. waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.tonight...northwest winds 10 to 20 knots becoming north 5 to
15 knots after midnight, then backing southwest late. smoke.
waves subsiding to calm to 2 feet. 
.sunday...south winds 5 to 15 knots. areas of smoke. 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 and a slight chance
of thunderstorms 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...southwest winds 15 to 25 knots becoming west
gales to 35 knots after midnight. showers likely and a chance of
thunderstorms 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 8 to
11 feet occasionally to 14 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. 

$$

fzus63 kmqt 180801
glfls 
expires:202607182000;;164999

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat jul 18 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 moves to afternoon. weak ridging of around 30.0 
inches returns to the great lakes this evening 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. then a 30.1 inch ridge descends southeast over 
the midwest tuesday through wednesday night. 




lsz263-182000-
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-
400 am edt sat jul 18 2026

...dense smoke advisory in effect until 6 am edt early this
morning...

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

$$

fzus63 kmqt 180801
glfls 
expires:202607182000;;164998

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat jul 18 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 moves to afternoon. weak ridging of around 30.0 
inches returns to the great lakes this evening 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. then a 30.1 inch ridge descends southeast over 
the midwest tuesday through wednesday night. 




lsz162-182000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt sat jul 18 2026 /300 am cdt sat jul 18 2026/

...dense smoke advisory in effect until 6 am edt /5 am cdt/ early
this morning...

.early this morning...northwest winds 10 to 20 knots. waves calm
to 2 feet. 
.today...northwest winds 10 to 20 knots becoming southwest 5 to
15 knots in the afternoon. patchy smoke. waves calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots becoming north less than
10 knots after midnight, then backing southwest late. patchy
smoke. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots backing south late.
patchy smoke. waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight. patchy smoke through midnight. a slight
chance of showers through midnight, then showers likely and a
slight chance of thunderstorms after midnight. waves calm to
2 feet. 
.monday...southwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. a chance of showers through early
afternoon. a chance of thunderstorms. showers likely by mid
afternoon. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 
.monday night...west winds 15 to 25 knots. a chance of showers
through midnight. waves subsiding to 1 to 3 feet. 
.tuesday...northwest winds 15 to 25 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 180801
glfls 
expires:202607182000;;165003

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat jul 18 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 moves to afternoon. weak ridging of around 30.0 
inches returns to the great lakes this evening 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. then a 30.1 inch ridge descends southeast over 
the midwest tuesday through wednesday night. 




lsz267-182000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt sat jul 18 2026

...dense smoke advisory in effect until 6 am edt early this
morning...

.early this morning...northwest winds 15 to 25 knots. areas of
smoke. waves 2 to 4 feet. 
.today...northwest winds 15 to 25 knots. areas of smoke. waves
building to 3 to 5 feet occasionally to 7 feet. 
.tonight...northwest winds 10 to 20 knots becoming north 5 to
15 knots after midnight, then backing west late. patchy smoke
through midnight. waves subsiding to calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots backing southeast late.
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 and a slight chance
of thunderstorms after midnight. waves building to 2 to 4 feet. 
.monday...south winds 15 to 25 knots. a chance of showers through
early afternoon. showers by mid afternoon. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 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 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 180801
glfls 
expires:202607182000;;165000

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat jul 18 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 moves to afternoon. weak ridging of around 30.0 
inches returns to the great lakes this evening 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. then a 30.1 inch ridge descends southeast over 
the midwest tuesday through wednesday night. 




lsz264-182000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt sat jul 18 2026

...dense smoke advisory in effect until 6 am edt early this
morning...

.early this morning...northwest winds 10 to 20 knots. patchy
smoke. waves 1 to 3 feet. 
.today...north winds 10 to 20 knots becoming northwest 5 to
15 knots in the afternoon, then backing west late. smoke. waves
subsiding to calm to 2 feet. 
.tonight...west winds 5 to 15 knots becoming south less than
10 knots late. smoke. waves calm to 2 feet. 
.sunday...south winds 5 to 15 knots. smoke. waves calm to 2 feet.
.sunday night...south winds 5 to 15 knots becoming southwest
15 to 25 knots after midnight. smoke through midnight. a chance
of showers through midnight. a slight chance of thunderstorms.
showers likely after midnight. waves building to 2 to 4 feet. 
.monday...southwest winds 15 to 25 knots. showers. a chance of
thunderstorms by mid afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.monday night...west winds 15 to 25 knots. a chance of showers.
waves subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...northwest gales to 35 knots diminishing to 15 to
25 knots. waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 1 to 3 feet. 
.wednesday...west winds 10 to 20 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 180801
glfls 
expires:202607182000;;165001

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat jul 18 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 moves to afternoon. weak ridging of around 30.0 
inches returns to the great lakes this evening 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. then a 30.1 inch ridge descends southeast over 
the midwest tuesday through wednesday night. 




lsz265-182000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt sat jul 18 2026

...dense smoke advisory in effect until 6 am edt early this
morning...

.early this morning...northwest winds 20 to 30 knots. patchy
smoke. waves 2 to 4 feet. 
.today...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. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then backing south late. smoke. waves
subsiding to calm to 2 feet. 
.sunday...south winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon. areas of smoke. waves calm to 2 feet. 
.sunday night...south winds 10 to 20 knots becoming southwest
20 to 30 knots after midnight. areas of smoke through midnight. a
chance of showers and a slight chance of thunderstorms after
midnight. waves building to 1 to 3 feet. 
.monday...southwest winds 20 to 30 knots. showers. a chance of
thunderstorms by mid afternoon. waves building to 2 to 4 feet. 
.monday night...west winds 20 to 30 knots increasing to gales to
35 knots after midnight. showers likely and a chance of
thunderstorms through midnight. waves building to 4 to 7 feet
occasionally to 9 feet. 
.tuesday...northwest gales to 40 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. 

$$