fzus61 kbuf 182002
glflo 
expires:202507190300;;671781

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt fri jul 18 2025

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 30.2 inch high will drift east into new england 
tonight, then off the new england coast saturday. a 29.7 inch low is 
then forecast to move from the western great lakes late saturday to 
new england by late sunday, with its trailing cold front crossing 
the lake sunday morning. a 30.1 inch high is then forecast to build 
from near james bay monday to new england tuesday, before moving 
offshore on wednesday.


loz063>065-190300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt fri jul 18 2025

.tonight...southwest winds 10 knots or less becoming south. waves
1 foot or less. 
.saturday...south winds 10 knots or less becoming northeast.
waves 1 foot or less. 
.saturday night...east winds 5 to 10 knots becoming southwest. a
chance of showers in the evening, then showers likely with a
chance of thunderstorms overnight. waves 2 feet or less. 
.sunday...west winds 5 to 10 knots becoming northwest. showers
likely with a chance of thunderstorms in the morning. waves 1 to
2 feet. 
.sunday night...northwest winds 10 to 15 knots becoming north
15 to 20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.monday...north winds 15 to 20 knots becoming east and
diminishing to 5 to 10 knots. waves 2 to 4 feet subsiding to
2 feet or less. 
.tuesday...east winds 10 knots or less becoming southeast. waves
1 foot or less. 
.wednesday...south winds 5 to 15 knots becoming southwest. a
chance of showers and thunderstorms wednesday night. waves 2 feet
or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 182002
glflo 
expires:202507190300;;671780

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt fri jul 18 2025

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 30.2 inch high will drift east into new england 
tonight, then off the new england coast saturday. a 29.7 inch low is 
then forecast to move from the western great lakes late saturday to 
new england by late sunday, with its trailing cold front crossing 
the lake sunday morning. a 30.1 inch high is then forecast to build 
from near james bay monday to new england tuesday, before moving 
offshore on wednesday.


loz062-190300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt fri jul 18 2025

.tonight...southeast winds 10 knots or less becoming south. waves
1 foot or less. 
.saturday...southeast winds 10 knots or less becoming east. waves
1 foot or less. 
.saturday night...southeast winds 5 to 10 knots becoming west.
showers likely in the evening, then showers likely with a chance
of thunderstorms overnight. waves 2 feet or less. 
.sunday...northwest winds 5 to 10 knots. showers likely with a
chance of thunderstorms in the morning. waves 1 to 2 feet. 
.sunday night...northwest winds 15 to 20 knots becoming north.
waves 1 to 3 feet. 
.monday...north winds 5 to 15 knots becoming east. waves 1 to
3 feet subsiding to 1 foot or less. 
.tuesday...east winds 5 to 10 knots becoming southeast. waves
around 1 foot. 
.wednesday...south winds 5 to 10 knots becoming southwest. a
chance of showers and thunderstorms wednesday night. waves 2 feet
or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 181942
glfle 
expires:202507190215;;670727

open lake forecast for lake erie
national weather service cleveland oh
342 pm edt fri jul 18 2025

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...
the lake remains between high pressure 30.10 inches to the
northeast and a stationary front over the ohio valley. this front
will advance north tonight as a warm front and cross the lake for
saturday. a cold front will cross the lake saturday night into
sunday. high pressure 30.10 inches will build from the north for
monday into tuesday. a warm front will cross the lake on
wednesday.


lez162>164-190215-
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-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
342 pm edt fri jul 18 2025

.tonight...east winds 10 knots or less becoming south. waves
1 foot or less. 
.saturday...south winds 10 knots or less. a chance of showers and
thunderstorms late. waves 1 foot or less. 
.saturday night...southwest winds 5 to 15 knots becoming west.
showers likely with a chance of thunderstorms in the evening,
then a chance of showers and thunderstorms overnight. waves
2 feet or less. 
.sunday...northwest winds 5 to 15 knots becoming north. waves
2 feet or less. 
.sunday night...north winds 5 to 10 knots becoming northeast.
waves 2 feet or less. 
.monday...northeast winds 5 to 10 knots becoming east. waves
2 feet or less. 
.tuesday...southeast winds 5 to 10 knots becoming south. waves
1 foot or less. 
.wednesday...south winds 5 to 15 knots becoming southwest. waves
2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 181942
glfle 
expires:202507190215;;670728

open lake forecast for lake erie
national weather service cleveland oh
342 pm edt fri jul 18 2025

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...
the lake remains between high pressure 30.10 inches to the
northeast and a stationary front over the ohio valley. this front
will advance north tonight as a warm front and cross the lake for
saturday. a cold front will cross the lake saturday night into
sunday. high pressure 30.10 inches will build from the north for
monday into tuesday. a warm front will cross the lake on
wednesday.


lez165>167-190215-
vermilion to avon point oh beyond 5 nm 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-
342 pm edt fri jul 18 2025

.tonight...northeast winds 10 knots or less becoming south. waves
1 foot or less. 
.saturday...south winds less than 10 knots becoming southwest.
waves 1 foot or less. 
.saturday night...south winds 5 to 15 knots becoming west. a
chance of showers and thunderstorms. waves 2 feet or less
building to 2 to 3 feet. 
.sunday...northwest winds 10 to 15 knots becoming north. a chance
of showers in the morning. waves 1 to 3 feet. 
.sunday night...north winds 10 to 15 knots becoming northeast.
waves 1 to 3 feet. 
.monday...northeast winds 5 to 15 knots becoming east. waves
2 feet or less. 
.tuesday...southeast winds 5 to 10 knots becoming south. waves
2 feet or less. 
.wednesday...south winds 5 to 15 knots becoming southwest. a
chance of showers and thunderstorms wednesday night. waves 1 to
3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 181942
glfle 
expires:202507190215;;670729

open lake forecast for lake erie
national weather service cleveland oh
342 pm edt fri jul 18 2025

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...
the lake remains between high pressure 30.10 inches to the
northeast and a stationary front over the ohio valley. this front
will advance north tonight as a warm front and cross the lake for
saturday. a cold front will cross the lake saturday night into
sunday. high pressure 30.10 inches will build from the north for
monday into tuesday. a warm front will cross the lake on
wednesday.


lez061-168-169-190215-
ripley to buffalo ny extending from 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-
342 pm edt fri jul 18 2025

.tonight...northeast winds 10 knots or less becoming south. waves
1 foot or less. 
.saturday...south winds less than 10 knots becoming west. waves
1 foot or less. 
.saturday night...south winds 10 knots or less becoming west. a
chance of showers and thunderstorms. waves 2 feet or less. 
.sunday...northwest winds 5 to 10 knots. a chance of showers and
thunderstorms in the morning. waves 1 to 2 feet. 
.sunday night...northwest winds 10 to 15 knots becoming north.
waves 1 to 2 feet. 
.monday...northeast winds 5 to 10 knots becoming east. waves
2 feet or less. 
.tuesday...southeast winds 5 to 10 knots becoming south. waves
1 foot or less. 
.wednesday...south winds 5 to 15 knots becoming southwest. a
chance of showers and thunderstorms wednesday night. waves 2 feet
or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 181938
glfsc 
expires:202507190400;;670674

lake st clair forecast
national weather service detroit/pontiac mi
338 pm edt fri jul 18 2025

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, 30.20 inches, tracks overhead today.
the next weak low pressure moves into the area on saturday
bringing humid and unsettled conditions. the cold front moves
through the area saturday night with high pressure building back
in late sunday into monday.


lcz460-190400-
lake st clair-
338 pm edt fri jul 18 2025

.tonight...southeast winds 5 to 10 knots. mostly clear. waves 2 feet
or less.
.saturday...south winds 5 to 10 knots increasing to 10 to 15 knots
in the afternoon. partly sunny. light showers likely late in the
afternoon. waves 2 feet or less.
.saturday night...southwest winds 10 to 15 knots becoming west 5 to
10 knots in the late evening and early morning...then becoming
northwest 10 to 15 knots after midnight. mostly cloudy early in the
evening becoming partly cloudy. light showers likely and a chance of
thunderstorms until early morning. waves 2 feet or less.
.sunday...north winds 10 to 15 knots diminishing to 5 to 10 knots in
the late morning and afternoon. partly sunny. waves 2 feet or less.
.sunday night...northeast winds 10 to 15 knots diminishing to 5 to
10 knots in the late evening and overnight. clear. waves 2 feet or
less.
.monday...northeast winds 5 to 10 knots increasing to 10 to 15 knots
in the evening. sunny in the morning becoming mostly clear. waves 2
feet or less.
.tuesday...southeast winds 5 to 10 knots. mostly clear. waves 2 feet
or less.
.wednesday...southwest winds 10 to 15 knots. partly cloudy. a chance
of showers and thunderstorms. waves 2 feet or less.

$$

fzus63 kdtx 181937
glflh 
expires:202507190400;;670665

open lake forecast for lake huron
national weather service detroit/pontiac mi
337 pm edt fri jul 18 2025

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, 30.20 inches, tracks overhead today.
the next weak low pressure moves into the area on saturday
bringing humid and unsettled conditions. the cold front moves
through the area saturday night with high pressure building back
in late sunday into monday.


lhz462>464-190400-
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-
337 pm edt fri jul 18 2025

.tonight...northeast winds 5 to 10 knots veering to the southeast
after midnight. waves 2 feet or less. 
.saturday...south winds 5 to 10 knots increasing to 10 to
15 knots in the late morning and early afternoon...then
decreasing to 5 to 10 knots late in the afternoon. showers likely
and a chance of thunderstorms in the afternoon. waves 1 to
3 feet. 
.saturday night...south winds 5 to 10 knots becoming 10 to
15 knots after midnight. showers likely and a chance of
thunderstorms in the evening. waves 1 to 3 feet. 
.sunday...north winds 10 to 15 knots. waves 1 to 3 feet. 
.sunday night...north winds 5 to 10 knots. waves 1 to 3 feet. 
.monday...northeast winds 5 to 10 knots. waves 2 feet or less. 
.tuesday...southeast winds 5 to 10 knots. waves 2 feet or less. 
.wednesday...south winds 10 to 15 knots decreasing to 5 to
10 knots. a chance of showers and thunderstorms...then a chance
of showers in the late evening and early morning. waves 1 to
3 feet. 


$$

fzus63 kdtx 181937
glflh 
expires:202507190400;;670664

open lake forecast for lake huron
national weather service detroit/pontiac mi
337 pm edt fri jul 18 2025

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, 30.20 inches, tracks overhead today.
the next weak low pressure moves into the area on saturday
bringing humid and unsettled conditions. the cold front moves
through the area saturday night with high pressure building back
in late sunday into monday.


lhz362-363-190400-
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-
337 pm edt fri jul 18 2025

.tonight...southeast winds 5 to 10 knots becoming south 10 to
15 knots after midnight. waves 1 to 3 feet. 
.saturday...south winds 10 to 15 knots decreasing to 5 to
10 knots in the afternoon. showers likely and a chance of
thunderstorms in the afternoon. waves 1 to 3 feet. 
.saturday night...north winds 5 to 10 knots increasing to 10 to
15 knots after midnight. a chance of showers and thunderstorms in
the evening. waves 1 to 3 feet. 
.sunday...north winds 10 to 15 knots decreasing to 5 to 10 knots
early in the afternoon. waves 1 to 3 feet. 
.sunday night...north winds 5 to 10 knots. waves 2 feet or less. 
.monday...northeast winds 5 to 10 knots veering to the east late
in the evening. waves 2 feet or less. 
.tuesday...southeast winds 5 to 10 knots increasing to 10 to
15 knots in the late evening and early morning. a chance of
showers in the late evening and early morning. waves 1 to 3 feet.
.wednesday...south winds 10 to 15 knots decreasing to 5 to
10 knots until early morning. a chance of showers. waves 1 to
3 feet. 


$$

fzus63 kdtx 181937
glflh 
expires:202507190400;;670663

open lake forecast for lake huron
national weather service detroit/pontiac mi
337 pm edt fri jul 18 2025

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, 30.20 inches, tracks overhead today.
the next weak low pressure moves into the area on saturday
bringing humid and unsettled conditions. the cold front moves
through the area saturday night with high pressure building back
in late sunday into monday.


lhz361-190400-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
337 pm edt fri jul 18 2025

.tonight...southeast winds 5 to 10 knots veering to the south
early in the morning. waves 1 to 3 feet. 
.saturday...south winds 5 to 10 knots in the morning becoming
light and variable...then becoming northeast 5 to 10 knots late
in the afternoon. a chance of showers in the afternoon. waves
2 feet or less. 
.saturday night...northeast winds 5 to 10 knots backing to the
northwest in the late evening and overnight. waves 2 feet or
less. 
.sunday...northwest winds 5 to 10 knots. waves 2 feet or less. 
.sunday night...northwest winds 5 to 10 knots. waves 2 feet or
less. 
.monday...east winds 5 to 10 knots veering to the southeast late
in the afternoon. waves 2 feet or less. 
.tuesday...southeast winds 5 to 10 knots becoming east 10 to
15 knots early in the evening...then becoming southeast 5 to
10 knots in the late evening and early morning. a chance of
showers in the late evening and early morning. waves 2 feet or
less. 
.wednesday...south winds 5 to 10 knots. a chance of showers. a
chance of thunderstorms early in the evening. waves 2 feet or
less. 


$$

fzus63 kmkx 181950
glflm 
expires:202507190315;;671188

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
250 pm cdt fri jul 18 2025

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis... 

high pressure around 30.2 inches over the great lakes region will
slowly exit to the east tonight as low pressure around 29.7 
inches develops in the lee of the colorado rockies. a warm front
will develop across northern wisconsin and the upper peninsula
overnight, bringing thunderstorms to the northern half of the lake
into the late overnight hours. additional thunderstorm development
is expected across the southern half into saturday morning. winds
become southwesterly as these storms end midday saturday, then
become northerly behind a cold front saturday afternoon. isolated
thunderstorms are possible along this front. high pressure around
30.0 inches will settle back into the region on sunday, slowly 
departing into monday and shifting winds to easterly. a low 
pressure trough of 29.8 inches will cross the upper midwest on 
tuesday, bringing southeasterly winds.



lmz080-669-671-673-675-777-779-870-872-874-876-878-190315-
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-
250 pm cdt fri jul 18 2025

sheboygan wi to pentwater mi south...

.tonight...east winds 5 to 10 kt becoming south. waves 1 to 2 ft.
.saturday...south winds 10 to 15 kt becoming southwest 10 to
20 kt. chance of showers and slight chance of thunderstorms in
the morning, then chance of showers and thunderstorms in the
afternoon. waves 1 to 3 ft. 
.saturday night...northwest winds 10 to 15 kt becoming north.
chance of showers and thunderstorms in the evening. waves 1 to
3 ft. 
.sunday...northeast winds 10 to 20 kt becoming north. waves 2 to
4 ft. 
.sunday night...northeast winds 10 to 20 kt becoming east 10 to
15 kt. waves 1 to 3 ft. 
.monday...east winds 10 to 20 kt diminishing to 10 to 15 kt.
waves 2 to 4 ft. 
.monday night...east winds 10 to 15 kt becoming southeast 10 to
20 kt. waves 1 to 3 ft. 
.tuesday...southeast winds 10 to 20 kt becoming south. waves 2 to
4 ft. 
.wednesday...south winds 10 to 20 kt becoming southwest. waves
2 to 4 ft.  

$$

fzus63 kmkx 181950
glflm 
expires:202507190315;;671187

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
250 pm cdt fri jul 18 2025

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis... 

high pressure around 30.2 inches over the great lakes region will
slowly exit to the east tonight as low pressure around 29.7 
inches develops in the lee of the colorado rockies. a warm front
will develop across northern wisconsin and the upper peninsula
overnight, bringing thunderstorms to the northern half of the lake
into the late overnight hours. additional thunderstorm development
is expected across the southern half into saturday morning. winds
become southwesterly as these storms end midday saturday, then
become northerly behind a cold front saturday afternoon. isolated
thunderstorms are possible along this front. high pressure around
30.0 inches will settle back into the region on sunday, slowly 
departing into monday and shifting winds to easterly. a low 
pressure trough of 29.8 inches will cross the upper midwest on 
tuesday, bringing southeasterly winds.



lmz261-362-364-366-563-565-567-868-190315-
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-
250 pm cdt fri jul 18 2025

sheboygan wi to pentwater mi north...

.tonight...southwest winds 5 to 10 kt becoming south. slight
chance of showers overnight. waves 1 ft or less. 
.saturday...south winds 10 to 15 kt increasing to 10 to 20 kt,
then veering to northwest 10 to 15 kt late. chance of showers and
thunderstorms in the morning, then chance of showers and slight
chance of thunderstorms in the afternoon. waves 1 to 2 ft. 
.saturday night...north winds 10 to 15 kt. waves 1 to 3 ft. 
.sunday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.sunday night...northeast winds 10 to 20 kt diminishing to 10 to
15 kt. waves 1 to 2 ft. 
.monday...east winds 10 to 15 kt. waves 1 to 3 ft. 
.monday night...east winds 10 to 15 kt becoming southeast 10 to
20 kt. waves 1 to 3 ft. 
.tuesday...south winds 10 to 20 kt. waves 2 to 4 ft. 
.wednesday...southwest winds 10 to 20 kt. chance of showers and
thunderstorms. waves 1 to 3 ft.  

$$

fzus63 kmqt 182002
glfls 
expires:202507190800;;671772

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 18 2025

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...

30.1 inch high pressure is centered over the lower great lakes this 
afternoon, and is expected to weaken into the evening. late tonight 
into saturday, a weak 29.9 inch trough sweeps across lake superior 
before being replaced with a 30.0 inch high by sunday. as the high 
shifts towards the lower great lakes through tuesday morning, it 
builds to 30.1 inches. low pressure will push out of the rockies on 
tuesday with a 29.8 inch extending from the central plains to the 
hudson bay by wednesday.



lsz162-190800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt fri jul 18 2025 /301 pm cdt fri jul 18 2025/

.late this afternoon...north winds 5 to 15 knots. showers likely.
waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots backing northeast late. a
chance of showers and a slight chance of thunderstorms. patchy
fog after midnight. waves calm to 2 feet. 
.saturday...north winds 5 to 15 knots backing southwest in the
afternoon. waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots veering north late.
areas of smoke. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots. areas of smoke through early
afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots. waves calm to 2 feet. 
.monday...east winds 10 to 20 knots. waves calm to 2 feet. 
.monday night...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. a chance of showers and thunderstorms.
waves calm to 2 feet. 
.tuesday...east winds 5 to 15 knots backing northeast. a chance
of showers and thunderstorms. waves calm to 2 feet. 
.wednesday...northwest winds 10 to 20 knots becoming north 5 to
15 knots. a chance of showers and thunderstorms. waves calm to
2 feet. 

$$

fzus63 kmqt 182002
glfls 
expires:202507190800;;671773

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 18 2025

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...

30.1 inch high pressure is centered over the lower great lakes this 
afternoon, and is expected to weaken into the evening. late tonight 
into saturday, a weak 29.9 inch trough sweeps across lake superior 
before being replaced with a 30.0 inch high by sunday. as the high 
shifts towards the lower great lakes through tuesday morning, it 
builds to 30.1 inches. low pressure will push out of the rockies on 
tuesday with a 29.8 inch extending from the central plains to the 
hudson bay by wednesday.



lsz263-190800-
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 18 2025

.late this afternoon...west winds 5 to 15 knots. a chance of
showers. waves calm to 2 feet. 
.tonight...south winds 5 to 15 knots backing east after midnight,
then backing northeast late. a chance of showers. a slight chance
of thunderstorms after midnight. patchy fog after midnight. waves
calm to 2 feet. 
.saturday...north winds 5 to 15 knots backing southwest in the
afternoon. a slight chance of showers through early afternoon.
waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots diminishing to less
than 10 knots late. areas of smoke after midnight. waves calm to
2 feet. 
.sunday...north winds 5 to 15 knots veering east by mid
afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.monday...east winds 5 to 15 knots. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots veering south after
midnight. a chance of showers and thunderstorms. waves calm to
2 feet. 
.tuesday...south winds 5 to 15 knots. a chance of showers and
thunderstorms. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering north. a chance of
showers. waves calm to 2 feet. 

$$

fzus63 kmqt 182002
glfls 
expires:202507190800;;671774

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 18 2025

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...

30.1 inch high pressure is centered over the lower great lakes this 
afternoon, and is expected to weaken into the evening. late tonight 
into saturday, a weak 29.9 inch trough sweeps across lake superior 
before being replaced with a 30.0 inch high by sunday. as the high 
shifts towards the lower great lakes through tuesday morning, it 
builds to 30.1 inches. low pressure will push out of the rockies on 
tuesday with a 29.8 inch extending from the central plains to the 
hudson bay by wednesday.



lsz264-190800-
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 18 2025

.late this afternoon...southwest winds 5 to 15 knots. a chance of
showers. waves calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots diminishing to less than
10 knots late. a chance of showers. patchy fog after midnight.
waves calm to 2 feet. 
.saturday...west winds less than 10 knots becoming southwest 5 to
15 knots in the afternoon, then veering west late. patchy fog
through early afternoon. a slight chance of showers through early
afternoon. waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots becoming northwest
less than 10 knots late. patchy dense fog through midnight. areas
of smoke after midnight. waves calm to 2 feet. 
.sunday...northwest winds less than 10 knots becoming southwest
5 to 15 knots by mid afternoon. areas of smoke through early
afternoon. waves calm to 2 feet. 
.sunday night...southwest winds less than 10 knots backing
southeast after midnight. waves calm to 2 feet. 
.monday...southeast winds 5 to 15 knots. waves calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots. a chance of
showers. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering northwest. a chance
of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 182002
glfls 
expires:202507190800;;671775

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 18 2025

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...

30.1 inch high pressure is centered over the lower great lakes this 
afternoon, and is expected to weaken into the evening. late tonight 
into saturday, a weak 29.9 inch trough sweeps across lake superior 
before being replaced with a 30.0 inch high by sunday. as the high 
shifts towards the lower great lakes through tuesday morning, it 
builds to 30.1 inches. low pressure will push out of the rockies on 
tuesday with a 29.8 inch extending from the central plains to the 
hudson bay by wednesday.



lsz265-190800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt fri jul 18 2025

.late this afternoon...northeast winds 5 to 15 knots. a chance of
showers. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots veering southeast after
midnight. a chance of showers. a slight chance of thunderstorms
after midnight. patchy fog after midnight. waves calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then becoming northwest 5 to 15 knots
late. patchy fog through early afternoon. a chance of showers
through early afternoon. waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots veering northwest
late. waves calm to 2 feet. 
.sunday...northwest winds 5 to 15 knots veering north by mid
afternoon. waves calm to 2 feet. 
.sunday night...south winds 5 to 15 knots. waves calm to 2 feet. 
.monday...southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.monday night...southeast winds 10 to 20 knots. a chance of
showers after midnight. waves calm to 2 feet. 
.tuesday...southeast winds 10 to 20 knots veering south. a chance
of showers and thunderstorms. waves calm to 2 feet. 
.wednesday...north winds 10 to 20 knots backing northwest. a
chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 182002
glfls 
expires:202507190800;;671776

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 18 2025

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...

30.1 inch high pressure is centered over the lower great lakes this 
afternoon, and is expected to weaken into the evening. late tonight 
into saturday, a weak 29.9 inch trough sweeps across lake superior 
before being replaced with a 30.0 inch high by sunday. as the high 
shifts towards the lower great lakes through tuesday morning, it 
builds to 30.1 inches. low pressure will push out of the rockies on 
tuesday with a 29.8 inch extending from the central plains to the 
hudson bay by wednesday.



lsz266-190800-
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 18 2025

.late this afternoon...south winds 5 to 15 knots. a chance of
showers. waves calm to 2 feet. 
.tonight...south winds 5 to 15 knots backing southeast after
midnight. a chance of showers. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots backing north in the
afternoon, then backing northwest late. patchy fog through early
afternoon. a chance of showers. waves calm to 2 feet. 
.saturday night...northwest winds 5 to 15 knots. patchy fog
through midnight. waves calm to 2 feet. 
.sunday...northwest winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...west winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet. 
.monday...southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.monday night...southeast winds 10 to 20 knots veering south
after midnight. waves calm to 2 feet. 
.tuesday...south winds 10 to 20 knots. a chance of showers and
thunderstorms. waves calm to 2 feet. 
.wednesday...southwest winds 10 to 20 knots becoming northwest
5 to 15 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 182002
glfls 
expires:202507190800;;671777

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 18 2025

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...

30.1 inch high pressure is centered over the lower great lakes this 
afternoon, and is expected to weaken into the evening. late tonight 
into saturday, a weak 29.9 inch trough sweeps across lake superior 
before being replaced with a 30.0 inch high by sunday. as the high 
shifts towards the lower great lakes through tuesday morning, it 
builds to 30.1 inches. low pressure will push out of the rockies on 
tuesday with a 29.8 inch extending from the central plains to the 
hudson bay by wednesday.



lsz267-190800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt fri jul 18 2025

.late this afternoon...south winds 5 to 15 knots. a slight chance
of showers. waves calm to 2 feet. 
.tonight...south winds 5 to 15 knots backing southeast after
midnight. a chance of showers. waves calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots backing northeast in
the afternoon, then backing north late. patchy fog through early
afternoon. showers likely through early afternoon, then a slight
chance of showers by mid afternoon. waves calm to 2 feet. 
.saturday night...northwest winds 10 to 20 knots. patchy fog
through midnight. waves calm to 2 feet. 
.sunday...northwest winds 10 to 20 knots. waves calm to 2 feet. 
.sunday night...northwest winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet. 
.monday...southeast winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.monday night...southeast winds 10 to 20 knots. waves calm to
2 feet. 
.tuesday...southeast winds 10 to 20 knots veering south. a chance
of showers and thunderstorms. waves calm to 2 feet. 
.wednesday...south winds 10 to 20 knots veering west. a chance of
showers. waves calm to 2 feet. 

$$