fzus61 kbuf 122002
glflo 
expires:202507130300;;332488

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sat jul 12 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 29.7 inch low north of lake superior will make its way 
to james bay tonight while deepening to 29.3 inches. the low will 
then lift north across hudson bay and into northern quebec 
sunday...while slowly dragging its trailing cold front across the 
lake late sunday and sunday night. a 30.1 inch high will slowly 
drift from the upper midwest to new england monday through 
wednesday...then a 29.7 inch low will track northeastward across the 
great lakes and into quebec wednesday night and thursday.


loz063>065-130300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt sat jul 12 2025

.tonight...east winds 5 to 15 knots becoming south. a chance of
showers after midnight. a chance of showers and thunderstorms
late. waves 1 to 3 feet. 
.sunday...south winds 5 to 15 knots becoming southwest. a chance
of showers and thunderstorms in the morning, then showers with a
chance of thunderstorms in the afternoon. waves 1 to 3 feet
subsiding to 1 foot or less. 
.sunday night...south winds 5 to 10 knots becoming west. a chance
of showers and thunderstorms in the evening, then a chance of
showers overnight. waves 1 foot or less. 
.monday...west winds 10 knots or less becoming southwest. waves
1 foot or less. 
.monday night...southwest winds 5 to 10 knots. waves 1 foot or
less. 
.tuesday...southwest winds 10 knots or less becoming south. waves
1 foot or less. 
.wednesday...south winds 5 to 10 knots. a chance of showers
wednesday night. waves 2 feet or less. 
.thursday...southwest winds 5 to 10 knots becoming west. showers
likely with a chance of thunderstorms. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 122002
glflo 
expires:202507130300;;332487

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sat jul 12 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 29.7 inch low north of lake superior will make its way 
to james bay tonight while deepening to 29.3 inches. the low will 
then lift north across hudson bay and into northern quebec 
sunday...while slowly dragging its trailing cold front across the 
lake late sunday and sunday night. a 30.1 inch high will slowly 
drift from the upper midwest to new england monday through 
wednesday...then a 29.7 inch low will track northeastward across the 
great lakes and into quebec wednesday night and thursday.


loz062-130300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt sat jul 12 2025

.tonight...southeast winds 5 to 10 knots becoming southwest. a
chance of showers after midnight. a chance of showers and
thunderstorms late. waves 1 to 2 feet. 
.sunday...southwest winds 5 to 10 knots becoming west. a chance
of showers and thunderstorms. waves 1 to 2 feet. 
.sunday night...west winds 5 to 10 knots. a chance of showers and
thunderstorms in the evening. waves 1 foot or less. 
.monday...west winds 10 knots or less becoming southwest. waves
1 foot or less. 
.monday night...southwest winds 5 to 10 knots. waves 2 feet or
less. 
.tuesday...southwest winds 10 knots or less. waves 1 foot or
less. 
.wednesday...southwest winds 10 knots or less becoming south. a
chance of showers wednesday night. waves 1 foot or less. 
.thursday...southwest winds 10 to 15 knots. a chance of showers.
waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 121944
glfle 
expires:202507130215;;331511

open lake forecast for lake erie
national weather service cleveland oh
344 pm edt sat jul 12 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...
a cold front will move east across lake erie on sunday. high 
pressure 30.10 inches will build across the region for monday 
and tuesday. a warm front lifts north across the lake on
wednesday, followed by a cold front thursday night or friday. 


lez164>167-130215-
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-
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-
344 pm edt sat jul 12 2025

.tonight...south winds 10 to 15 knots becoming southwest. a
chance of showers and thunderstorms through the early overnight,
then a chance of showers with a slight chance of thunderstorms
late. waves 1 to 2 feet. 
.sunday...west winds 5 to 10 knots. a chance of showers and
thunderstorms early, then a slight chance of showers and
thunderstorms. waves 2 feet or less. 
.sunday night...west winds 5 to 10 knots. waves 1 foot or less. 
.monday...northwest winds 10 knots or less becoming west. waves
1 foot or less. 
.monday night...southwest winds 10 knots or less becoming south.
waves 1 foot or less. 
.tuesday...south winds 10 knots or less. waves 1 foot or less. 
.wednesday...south winds 5 to 15 knots becoming southwest. a
chance of showers during the day, then a chance of showers and
thunderstorms wednesday night. waves 2 feet or less. 
.thursday...southwest winds 10 to 15 knots becoming west. a
chance of showers and thunderstorms. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 121944
glfle 
expires:202507130215;;331512

open lake forecast for lake erie
national weather service cleveland oh
344 pm edt sat jul 12 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...
a cold front will move east across lake erie on sunday. high 
pressure 30.10 inches will build across the region for monday 
and tuesday. a warm front lifts north across the lake on
wednesday, followed by a cold front thursday night or friday. 


lez061-168-169-130215-
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-
344 pm edt sat jul 12 2025

.tonight...south winds 5 to 10 knots becoming southwest. a chance
of showers and thunderstorms early, then a slight chance of
showers and thunderstorms late this evening. a chance of showers
and thunderstorms after midnight. waves 2 feet or less. 
.sunday...southwest winds 5 to 10 knots becoming west. a chance
of showers and thunderstorms through early afternoon, then a
slight chance of showers and thunderstorms late. waves 1 to
2 feet. 
.sunday night...southwest winds 10 knots or less. waves 2 feet or
less. 
.monday...southwest winds 10 knots or less becoming west. waves
1 foot or less. 
.monday night...southwest winds 5 to 10 knots becoming south.
waves 1 foot or less. 
.tuesday...west winds 10 knots or less becoming south. waves
1 foot or less. 
.wednesday...south winds 5 to 10 knots becoming southwest. a
chance of showers during the day, then a chance of showers and
thunderstorms wednesday night. waves 2 feet or less. 
.thursday...southwest winds around 10 knots. a chance of showers
and thunderstorms. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 121944
glfle 
expires:202507130215;;331510

open lake forecast for lake erie
national weather service cleveland oh
344 pm edt sat jul 12 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...
a cold front will move east across lake erie on sunday. high 
pressure 30.10 inches will build across the region for monday 
and tuesday. a warm front lifts north across the lake on
wednesday, followed by a cold front thursday night or friday. 


lez162-163-130215-
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-
344 pm edt sat jul 12 2025

.tonight...southwest winds 10 to 15 knots becoming west. showers
likely with a chance of thunderstorms this evening, then a chance
of showers with a slight chance of thunderstorms after midnight.
waves 1 to 2 feet. 
.sunday...west winds 5 to 10 knots. a slight chance of showers
and thunderstorms early. waves 1 foot or less. 
.sunday night...west winds 5 to 10 knots becoming northwest.
waves 1 foot or less. 
.monday...west winds 10 knots or less becoming southwest. waves
1 foot or less. 
.monday night...south winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.tuesday...southwest winds 10 knots or less becoming south. waves
1 foot or less. 
.wednesday...south winds 5 to 10 knots becoming southwest. a
chance of showers and thunderstorms. waves 1 foot or less. 
.thursday...southwest winds around 10 knots becoming west. a
chance of showers and thunderstorms. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 122002
glflh 
expires:202507130415;;332484

open lake forecast for lake huron
national weather service detroit/pontiac mi
402 pm edt sat jul 12 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...the thunderstorm threat has generally receeded
although some isolated development remains possible through the
evening hours. high pressure, 30.10 inches, will then fill in by
monday morning, bringing dry conditions and lighter winds.


lhz462>464-130415-
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-
402 pm edt sat jul 12 2025

.tonight...south winds 10 to 15 knots becoming southwest 5 to
10 knots in the late evening and overnight. a chance of showers
and thunderstorms in the evening...then a chance of showers after
midnight. waves 1 to 3 feet. 
.sunday...southwest winds 5 to 10 knots. waves 2 feet or less. 
.sunday night...north winds 5 to 10 knots veering to the south in
the late evening and early morning...then veering to the
southwest after midnight. waves 2 feet or less. 
.monday...southwest winds 5 to 10 knots backing to the south
early in the afternoon. waves 2 feet or less. 
.monday night...south winds 5 to 10 knots veering to the
southwest after midnight. waves 2 feet or less. 
.tuesday...light and variable winds becoming south 5 to 10 knots.
waves 2 feet or less. 
.wednesday...south winds 5 to 10 knots backing to the north early
in the evening...then increasing to 10 to 15 knots in the late
evening and early morning. a chance of showers. waves 1 to
3 feet. 
.thursday...north winds 10 to 15 knots backing to the west early
in the evening...then veering to the west 10 to 15 knots in the
late evening and early morning. a chance of showers. a chance of
thunderstorms in the late morning and early afternoon. waves 1 to
3 feet. 


$$

fzus63 kdtx 122002
glfsc 
expires:202507130415;;332490

lake st clair forecast
national weather service detroit/pontiac mi
402 pm edt sat jul 12 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...the thunderstorm threat has generally receeded
although some isolated development remains possible through the
evening hours. high pressure, 30.10 inches, will then fill in by
monday morning, bringing dry conditions and lighter winds.


lcz460-130415-
lake st clair-
402 pm edt sat jul 12 2025

.tonight...southwest winds 10 to 15 knots becoming west 5 to 10
knots after midnight. mostly cloudy with a chance of showers and
thunderstorms in the evening...then partly cloudy with a chance of
light showers after midnight. waves 2 feet or less.
.sunday...west winds 5 to 10 knots backing to the southwest in the
afternoon. mostly sunny. waves 2 feet or less.
.sunday night...northwest winds 5 to 10 knots. mostly clear. waves 2
feet or less.
.monday...west winds 5 to 10 knots backing to the south early in the
afternoon. sunny. waves 2 feet or less.
.monday night...southwest winds 5 to 10 knots. clear. waves 2 feet
or less.
.tuesday...light and variable winds becoming south 5 to 10 knots in
the afternoon and evening. mostly clear. waves 2 feet or less.
.wednesday...south winds 10 to 15 knots. partly cloudy. a chance of
showers and thunderstorms. waves 2 feet or less.
.thursday...northwest winds 10 to 15 knots. partly cloudy. showers
likely and a chance of thunderstorms. waves 2 feet or less.

$$

fzus63 kdtx 122002
glflh 
expires:202507130415;;332482

open lake forecast for lake huron
national weather service detroit/pontiac mi
402 pm edt sat jul 12 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...the thunderstorm threat has generally receeded
although some isolated development remains possible through the
evening hours. high pressure, 30.10 inches, will then fill in by
monday morning, bringing dry conditions and lighter winds.


lhz361-130415-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
402 pm edt sat jul 12 2025

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


$$

fzus63 kdtx 122002
glflh 
expires:202507130415;;332483

open lake forecast for lake huron
national weather service detroit/pontiac mi
402 pm edt sat jul 12 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...the thunderstorm threat has generally receeded
although some isolated development remains possible through the
evening hours. high pressure, 30.10 inches, will then fill in by
monday morning, bringing dry conditions and lighter winds.


lhz362-363-130415-
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-
402 pm edt sat jul 12 2025

.tonight...south winds 10 to 15 knots becoming southwest 5 to
10 knots in the late evening and overnight. a chance of showers
in the evening. waves 2 to 4 feet. 
.sunday...west winds 5 to 10 knots backing to the southeast late
in the afternoon. waves 1 to 3 feet. 
.sunday night...southeast winds 5 to 10 knots early in the
evening becoming light and variable...then becoming south 5 to
10 knots after midnight. waves 2 feet or less. 
.monday...southwest winds 5 to 10 knots becoming south 10 to
15 knots in the late morning and afternoon. waves 1 to 3 feet. 
.monday night...southeast winds 5 to 10 knots early in the
evening becoming light and variable. waves 1 to 3 feet. 
.tuesday...light and variable winds becoming south 5 to 10 knots
late in the morning...then backing to the southeast late in the
afternoon becoming south 10 to 15 knots late in the evening.
waves 2 feet or less. 
.wednesday...south winds 5 to 10 knots becoming east 10 to
15 knots until early evening...then backing to the north in the
late evening and early morning. a chance of showers. waves 1 to
3 feet. 
.thursday...north winds 10 to 15 knots. a chance of showers.
waves 1 to 3 feet. 


$$

fzus63 kmkx 121935
glflm 
expires:202507130330;;331332

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
235 pm cdt sat jul 12 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... 

low pressure of 29.5 inches will continue to lift northward across
ontario and into the james bay region tonight. a weak cold front
will cross the lake this evening, with winds gradually turning
more westerly as the front progresses eastward. high pressure of
29.9 inches will move across the southern portion of the lake on
sunday. 

southerly flow then returns to the lake on monday, continuing
through at least tuesday. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-130330-
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-
235 pm cdt sat jul 12 2025

sheboygan wi to pentwater mi south...

.tonight...southwest winds 10 to 20 kt becoming west 10 to 15 kt.
slight chance of showers this evening. waves 1 to 3 ft. 
.sunday...west winds 10 to 15 kt backing to south. waves 1 to
2 ft. 
.sunday night...south winds 10 to 15 kt becoming southwest. areas
of smoke. waves 1 to 2 ft. 
.monday...southwest winds 10 to 20 kt becoming south. areas of
smoke in the morning. waves 1 to 3 ft. 
.monday night...south winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 3 ft. 
.tuesday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.tuesday night...south winds 10 to 15 kt. chance of showers.
waves 1 to 3 ft. 
.wednesday...southwest winds 10 to 20 kt veering to west. chance
of showers. waves 2 to 4 ft. 
.thursday...west winds 10 to 20 kt veering to north. chance of
showers. waves 3 to 5 ft.  

$$

fzus63 kmkx 121935
glflm 
expires:202507130330;;331331

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
235 pm cdt sat jul 12 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... 

low pressure of 29.5 inches will continue to lift northward across
ontario and into the james bay region tonight. a weak cold front
will cross the lake this evening, with winds gradually turning
more westerly as the front progresses eastward. high pressure of
29.9 inches will move across the southern portion of the lake on
sunday. 

southerly flow then returns to the lake on monday, continuing
through at least tuesday. 


lmz261-362-364-366-563-565-567-868-130330-
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-
235 pm cdt sat jul 12 2025

sheboygan wi to pentwater mi north...

.tonight...southwest winds 10 to 20 kt becoming west 10 to 15 kt.
slight chance of showers and thunderstorms this evening. patchy
dense fog overnight. waves 1 to 3 ft. 
.sunday...west winds 10 to 15 kt becoming southwest 10 to 20 kt.
waves 1 to 3 ft. 
.sunday night...southwest winds 10 to 20 kt. areas of smoke
overnight. waves 2 to 4 ft. 
.monday...southwest winds 10 to 20 kt. waves 1 to 3 ft. 
.monday night...south winds 10 to 20 kt diminishing to 5 to 10 kt
overnight. waves 1 to 3 ft. 
.tuesday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.tuesday night...southwest winds 10 to 20 kt becoming south 10 to
15 kt. chance of showers and thunderstorms. waves 1 to 3 ft. 
.wednesday...northeast winds 10 to 20 kt. chance of showers.
waves 2 to 4 ft. 
.thursday...northeast winds 10 to 20 kt becoming north 15 to
25 kt. waves 3 to 5 ft.  

$$

fzus63 kmqt 122001
glfls 
expires:202507130800;;332358

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat jul 12 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...

a 29.8 inch trough moves across the lake through this afternoon as a 
low over northern ontario deepens to 29.6 inches. this low deepens 
further to 29.4 inches tonight as it drifts northeast towards hudson 
bay while 30.0 inch high pressure builds just south of the great 
lakes basin. the high maintains strength and position on sunday 
while the low deepens to 29.2 inches over hudson bay. on monday, 
weak ridging near 30.0 inches builds over lake superior as 29.7 inch 
low pressure forms over the high plains. this low will pass a 29.9 
inch trough over lake superior tuesday before 30.1 inch high 
pressure builds in its wake over northern ontario wednesday into 
thursday.



lsz162-130800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sat jul 12 2025 /301 pm cdt sat jul 12 2025/

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

$$

fzus63 kmqt 122001
glfls 
expires:202507130800;;332359

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat jul 12 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...

a 29.8 inch trough moves across the lake through this afternoon as a 
low over northern ontario deepens to 29.6 inches. this low deepens 
further to 29.4 inches tonight as it drifts northeast towards hudson 
bay while 30.0 inch high pressure builds just south of the great 
lakes basin. the high maintains strength and position on sunday 
while the low deepens to 29.2 inches over hudson bay. on monday, 
weak ridging near 30.0 inches builds over lake superior as 29.7 inch 
low pressure forms over the high plains. this low will pass a 29.9 
inch trough over lake superior tuesday before 30.1 inch high 
pressure builds in its wake over northern ontario wednesday into 
thursday.



lsz263-130800-
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 sat jul 12 2025

.late this afternoon...west winds 10 to 20 knots. areas of smoke.
a chance of showers and thunderstorms. waves calm to 2 feet. 
.tonight...west winds 10 to 20 knots. areas of smoke. waves
building to 1 to 3 feet. 
.sunday...southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. areas of smoke. waves building to 2 to
4 feet. 
.sunday night...southwest winds 10 to 20 knots becoming west 5 to
15 knots late. areas of smoke through midnight. a slight chance
of showers and thunderstorms through midnight. waves subsiding to
1 to 3 feet. 
.monday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves subsiding to 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. 
.tuesday night...north winds 5 to 15 knots veering northeast
after midnight. showers likely through midnight. a chance of
thunderstorms. a chance of showers after midnight. waves calm to
2 feet. 
.wednesday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots backing west. waves
calm to 2 feet. 

$$

fzus63 kmqt 122001
glfls 
expires:202507130800;;332360

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat jul 12 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...

a 29.8 inch trough moves across the lake through this afternoon as a 
low over northern ontario deepens to 29.6 inches. this low deepens 
further to 29.4 inches tonight as it drifts northeast towards hudson 
bay while 30.0 inch high pressure builds just south of the great 
lakes basin. the high maintains strength and position on sunday 
while the low deepens to 29.2 inches over hudson bay. on monday, 
weak ridging near 30.0 inches builds over lake superior as 29.7 inch 
low pressure forms over the high plains. this low will pass a 29.9 
inch trough over lake superior tuesday before 30.1 inch high 
pressure builds in its wake over northern ontario wednesday into 
thursday.



lsz264-130800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt sat jul 12 2025

.late this afternoon...west winds 5 to 15 knots. a chance of
showers and thunderstorms. waves calm to 2 feet. 
.tonight...west winds 10 to 20 knots. a slight chance of showers
through midnight. areas of smoke. waves building to 2 to 4 feet. 
.sunday...southwest winds 10 to 20 knots. areas of smoke. waves
2 to 4 feet. 
.sunday night...southwest winds 10 to 20 knots becoming west 5 to
15 knots late. a slight chance of showers and thunderstorms
through midnight. areas of smoke. waves subsiding to 1 to 3 feet.
.monday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves subsiding to calm to 2 feet. 
.monday night...south winds 5 to 15 knots backing southeast after
midnight. a chance of showers after midnight. waves calm to
2 feet. 
.tuesday...south winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 
.tuesday night...north winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots backing north. a
chance of showers. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots backing west. waves calm to
2 feet. 

$$

fzus63 kmqt 122001
glfls 
expires:202507130800;;332361

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat jul 12 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...

a 29.8 inch trough moves across the lake through this afternoon as a 
low over northern ontario deepens to 29.6 inches. this low deepens 
further to 29.4 inches tonight as it drifts northeast towards hudson 
bay while 30.0 inch high pressure builds just south of the great 
lakes basin. the high maintains strength and position on sunday 
while the low deepens to 29.2 inches over hudson bay. on monday, 
weak ridging near 30.0 inches builds over lake superior as 29.7 inch 
low pressure forms over the high plains. this low will pass a 29.9 
inch trough over lake superior tuesday before 30.1 inch high 
pressure builds in its wake over northern ontario wednesday into 
thursday.



lsz265-130800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt sat jul 12 2025

.late this afternoon...west winds 5 to 15 knots. a chance of
showers and thunderstorms. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots increasing to 10 to 20 knots
after midnight. areas of smoke. waves calm to 2 feet. 
.sunday...west winds 10 to 20 knots backing south late. areas of
smoke. waves calm to 2 feet. 
.sunday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight, then becoming west 10 to 20 knots
late. a slight chance of showers and thunderstorms through
midnight. areas of smoke. waves calm to 2 feet. 
.monday...west winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. waves calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots. waves calm to
2 feet. 
.tuesday...south winds 10 to 20 knots. a chance of showers and
thunderstorms. waves calm to 2 feet. 
.tuesday night...northwest winds 10 to 20 knots veering north
after midnight. a chance of showers and thunderstorms. waves calm
to 2 feet. 
.wednesday...north winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 
.thursday...north winds 10 to 20 knots backing northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 122001
glfls 
expires:202507130800;;332362

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat jul 12 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...

a 29.8 inch trough moves across the lake through this afternoon as a 
low over northern ontario deepens to 29.6 inches. this low deepens 
further to 29.4 inches tonight as it drifts northeast towards hudson 
bay while 30.0 inch high pressure builds just south of the great 
lakes basin. the high maintains strength and position on sunday 
while the low deepens to 29.2 inches over hudson bay. on monday, 
weak ridging near 30.0 inches builds over lake superior as 29.7 inch 
low pressure forms over the high plains. this low will pass a 29.9 
inch trough over lake superior tuesday before 30.1 inch high 
pressure builds in its wake over northern ontario wednesday into 
thursday.



lsz266-130800-
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 sat jul 12 2025

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

$$

fzus63 kmqt 122001
glfls 
expires:202507130800;;332363

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat jul 12 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...

a 29.8 inch trough moves across the lake through this afternoon as a 
low over northern ontario deepens to 29.6 inches. this low deepens 
further to 29.4 inches tonight as it drifts northeast towards hudson 
bay while 30.0 inch high pressure builds just south of the great 
lakes basin. the high maintains strength and position on sunday 
while the low deepens to 29.2 inches over hudson bay. on monday, 
weak ridging near 30.0 inches builds over lake superior as 29.7 inch 
low pressure forms over the high plains. this low will pass a 29.9 
inch trough over lake superior tuesday before 30.1 inch high 
pressure builds in its wake over northern ontario wednesday into 
thursday.



lsz267-130800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt sat jul 12 2025

.late this afternoon...west winds 10 to 20 knots. a slight chance
of showers and thunderstorms. waves calm to 2 feet. 
.tonight...west winds 10 to 20 knots becoming southwest 5 to
15 knots after midnight, then increasing to 10 to 20 knots late.
a slight chance of showers and thunderstorms through midnight.
areas of smoke after midnight. waves calm to 2 feet. 
.sunday...southwest winds 10 to 20 knots backing south late.
areas of smoke. waves calm to 2 feet. 
.sunday night...south winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight, then diminishing to 10 to 20 knots
late. areas of smoke. a slight chance of showers. a slight chance
of thunderstorms after midnight. waves building to 1 to 3 feet. 
.monday...west winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. areas of smoke through early afternoon. a
slight chance of showers and thunderstorms through early
afternoon. waves subsiding to calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots. waves calm to
2 feet. 
.tuesday...south winds 10 to 20 knots. a chance of showers. waves
calm to 2 feet. 
.tuesday night...southwest winds 10 to 20 knots. a chance of
showers and thunderstorms. waves building to 1 to 3 feet. 
.wednesday...north winds 10 to 20 knots. a chance of showers and
thunderstorms. waves subsiding to calm to 2 feet. 
.thursday...north winds 10 to 20 knots. waves calm to 2 feet. 

$$