fzus61 kbuf 090201
glflo 
expires:202505090900;;196163

open lake forecast for lake ontario
national weather service buffalo ny
1001 pm edt thu may 8 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 30.4 inch high over james bay will build across lake 
ontario through friday. the high will weaken as it slides southward 
into the lower ohio valley saturday as a 29.8 inch low moves up the 
new england coastline. a 30.5 inch high will then move across the 
great lakes region sunday through sunday night. the high will remain 
off the east coast monday.


loz063>065-090900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1001 pm edt thu may 8 2025

.overnight...northwest winds 5 to 15 knots becoming north.
waves 2 feet or less. 
.friday...north winds 10 to 15 knots becoming northwest. a chance
of showers late. waves 1 to 3 feet. 
.friday night...northwest winds 5 to 15 knots. a chance of
showers. waves 1 to 3 feet. 
.saturday...northwest winds 10 to 15 knots becoming west 15 to
20 knots. a chance of showers in the morning. waves 1 to 3 feet
building to 2 to 4 feet. 
.saturday night...west winds 15 to 20 knots becoming north 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.sunday...north winds 5 to 15 knots becoming south 10 knots or
less. waves 1 to 3 feet subsiding to 1 foot or less. 
.monday...south winds 5 to 15 knots. waves 2 feet or less. 
.tuesday...south winds 5 to 10 knots becoming southeast. a chance
of showers tuesday night. waves 2 feet or less. 

$$

fzus61 kbuf 090201
glflo 
expires:202505090900;;196162

open lake forecast for lake ontario
national weather service buffalo ny
1001 pm edt thu may 8 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 30.4 inch high over james bay will build across lake 
ontario through friday. the high will weaken as it slides southward 
into the lower ohio valley saturday as a 29.8 inch low moves up the 
new england coastline. a 30.5 inch high will then move across the 
great lakes region sunday through sunday night. the high will remain 
off the east coast monday.


loz062-090900-
lake ontario open waters from the niagara river to hamlin beach-
1001 pm edt thu may 8 2025

.overnight...north winds 10 knots or less. waves 1 foot or
less. 
.friday...north winds 10 knots or less becoming west. waves 1 to
2 feet. 
.friday night...west winds 5 to 15 knots becoming northwest.
waves 1 to 2 feet. 
.saturday...northwest winds 10 to 15 knots becoming west. waves
2 to 3 feet. 
.saturday night...west winds 10 to 15 knots becoming north. waves
1 to 3 feet. 
.sunday...northeast winds 5 to 10 knots becoming southeast. waves
2 feet or less. 
.monday...south winds 5 to 10 knots. waves 1 foot or less. 
.tuesday...south winds 5 to 10 knots becoming southeast. a chance
of showers tuesday night. waves 2 feet or less. 

$$

fzus61 kcle 090142
glfle 
expires:202505090815;;195453

open lake forecast for lake erie
national weather service cleveland oh
942 pm edt thu may 8 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...
high pressure 30.20 inches will persist across the area into
friday. a weak trough averaging 30.00 inches will cross lake erie 
on saturday. high pressure 30.50 inches will enter the region on 
saturday night and remain through monday. a warm front will lift
north across lake erie early next week.


lez162-163-090815-
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-
942 pm edt thu may 8 2025

.overnight...northeast winds 10 to 15 knots becoming north.
waves 1 to 3 feet. 
.friday...north winds 5 to 15 knots becoming northeast. waves
2 feet or less. 
.friday night...east winds 10 knots or less becoming west. waves
1 foot or less. 
.saturday...west winds 5 to 10 knots. waves 1 foot or less. 
.saturday night...north winds 10 to 15 knots becoming northeast.
waves 2 feet or less. 
.sunday...northeast winds 5 to 15 knots becoming southeast. waves
2 feet or less. 
.monday...southeast winds 5 to 10 knots. waves 2 feet or less. 
.tuesday...southeast winds around 10 knots. a chance of showers.
waves 2 feet or less. 

$$

fzus61 kcle 090142
glfle 
expires:202505090815;;195454

open lake forecast for lake erie
national weather service cleveland oh
942 pm edt thu may 8 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...
high pressure 30.20 inches will persist across the area into
friday. a weak trough averaging 30.00 inches will cross lake erie 
on saturday. high pressure 30.50 inches will enter the region on 
saturday night and remain through monday. a warm front will lift
north across lake erie early next week.


lez164>166-090815-
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-
942 pm edt thu may 8 2025

.overnight...northeast winds 10 to 15 knots. waves 1 to
3 feet. 
.friday...northeast winds 5 to 15 knots becoming northwest. waves
1 to 3 feet. 
.friday night...northwest winds 5 to 10 knots becoming west.
waves around 1 foot. 
.saturday...west winds 5 to 10 knots becoming southwest. waves
2 feet or less. 
.saturday night...west winds 5 to 15 knots becoming northeast.
waves 1 to 2 feet. 
.sunday...northeast winds 5 to 10 knots becoming southeast. waves
1 to 2 feet. 
.monday...southeast winds 5 to 15 knots. waves 1 to 2 feet. 
.tuesday...southeast winds 10 to 15 knots. a chance of showers
during the day, then a chance of showers and thunderstorms
tuesday night. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 090142
glfle 
expires:202505090815;;195455

open lake forecast for lake erie
national weather service cleveland oh
942 pm edt thu may 8 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...
high pressure 30.20 inches will persist across the area into
friday. a weak trough averaging 30.00 inches will cross lake erie 
on saturday. high pressure 30.50 inches will enter the region on 
saturday night and remain through monday. a warm front will lift
north across lake erie early next week.


lez061-167>169-090815-
ripley to buffalo ny extending from 5nm 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-
942 pm edt thu may 8 2025

.overnight...northeast winds 5 to 15 knots. waves 2 feet or
less. 
.friday...northeast winds 5 to 15 knots becoming northwest. waves
1 to 3 feet. 
.friday night...west winds 5 to 10 knots becoming northwest.
waves 2 feet or less. 
.saturday...west winds 5 to 15 knots becoming southwest. waves
1 to 2 feet. 
.saturday night...west winds 5 to 15 knots becoming northeast.
waves 1 to 2 feet. 
.sunday...northeast winds 5 to 10 knots becoming southeast. waves
2 feet or less. 
.monday...southeast winds 5 to 15 knots. waves 2 feet or less. 
.tuesday...southeast winds 5 to 15 knots. a chance of showers.
waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 090142
glfsc 
expires:202505090945;;195452

lake st clair forecast
national weather service detroit/pontiac mi
942 pm edt thu may 8 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, 30.30 inches, to build in through the
day bringing light winds across the great lakes. high pressure
then holds through the weekend, sustaining tranquil conditions.


lcz460-090945-
lake st clair-
942 pm edt thu may 8 2025

.rest of tonight...north winds 10 to 15 knots. clear. waves 2 feet
or less.
.friday...north winds 10 to 15 knots diminishing to 5 to 10 knots in
the late morning and afternoon. sunny. waves 2 feet or less.
.friday night...northeast winds 5 to 10 knots backing to the west
after midnight. clear. waves 2 feet or less.
.saturday...west winds 5 to 10 knots. mostly sunny. waves 2 feet or
less.
.saturday night...north winds 10 to 15 knots becoming northeast 5 to
10 knots in the late evening and overnight. clear. waves 2 feet or
less.
.sunday...northeast winds 5 to 10 knots veering to the southeast in
the afternoon and evening. clear. waves 2 feet or less.
.monday...south winds 5 to 10 knots. mostly clear. waves 2 feet or
less.
.tuesday...southeast winds 10 to 15 knots. partly cloudy. a chance
of rain. waves 2 feet or less.

$$

fzus63 kdtx 090141
glflh 
expires:202505090945;;195442

open lake forecast for lake huron
national weather service detroit/pontiac mi
941 pm edt thu may 8 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, 30.30 inches, to build in through the
day bringing light winds across the great lakes. high pressure
then holds through the weekend, sustaining tranquil conditions.


lhz462>464-090945-
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-
941 pm edt thu may 8 2025

.rest of tonight...north winds 10 to 15 knots decreasing to 5 to
10 knots early in the morning. waves 3 to 5 feet subsiding to
1 to 3 feet early in the morning. 
.friday...north winds 5 to 10 knots. waves 1 to 3 feet. 
.friday night...light and variable winds becoming southwest 5 to
10 knots after midnight. waves 2 feet or less. 
.saturday...southwest winds 5 to 10 knots. waves 2 feet or less. 
.saturday night...north winds 10 to 15 knots decreasing to 5 to
10 knots in the late evening and overnight. waves 1 to 3 feet. 
.sunday...northeast winds 5 to 10 knots becoming south 10 to
15 knots late in the evening. waves 2 feet or less. 
.monday...south winds 10 to 15 knots. waves 1 to 3 feet. 
.tuesday...south winds 10 to 15 knots. waves 1 to 3 feet. 


$$

fzus63 kdtx 090141
glflh 
expires:202505090945;;195441

open lake forecast for lake huron
national weather service detroit/pontiac mi
941 pm edt thu may 8 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, 30.30 inches, to build in through the
day bringing light winds across the great lakes. high pressure
then holds through the weekend, sustaining tranquil conditions.


lhz363-090945-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
941 pm edt thu may 8 2025

.rest of tonight...north winds 5 to 10 knots. waves 1 to 3 feet. 
.friday...north winds 5 to 10 knots until late afternoon becoming
light and variable. waves 2 feet or less. 
.friday night...light and variable winds becoming southwest 5 to
10 knots in the late evening and overnight. waves 2 feet or less.
.saturday...southwest winds 5 to 10 knots veering to the
northwest in the late morning and early afternoon...then becoming
northwest 5 to 10 knots early in the afternoon. waves 2 feet or
less. 
.saturday night...north winds 5 to 10 knots. waves 2 feet or
less. 
.sunday...east winds 5 to 10 knots becoming south 10 to 15 knots
late in the evening. waves 1 to 3 feet. 
.monday...south winds 10 to 15 knots. waves 2 to 4 feet. 
.tuesday...south winds 10 to 15 knots. waves 1 to 3 feet. 


$$

fzus63 kdtx 090141
glflh 
expires:202505090945;;195440

open lake forecast for lake huron
national weather service detroit/pontiac mi
941 pm edt thu may 8 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, 30.30 inches, to build in through the
day bringing light winds across the great lakes. high pressure
then holds through the weekend, sustaining tranquil conditions.


lhz361-362-090945-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
941 pm edt thu may 8 2025

.rest of tonight...north winds 5 to 10 knots. waves 2 feet or
less. 
.friday...north winds 5 to 10 knots early in the morning becoming
light and variable. waves 2 feet or less. 
.friday night...southeast winds 5 to 10 knots veering to the
southwest in the late evening and overnight. waves 2 feet or
less. 
.saturday...southwest winds 5 to 10 knots veering to the
northwest in the late morning and early afternoon...then
increasing to 10 to 15 knots early in the afternoon. waves 2 feet
or less. 
.saturday night...north winds 5 to 10 knots veering to the
northeast after midnight. waves 2 feet or less. 
.sunday...northeast winds 5 to 10 knots veering to the southeast
late in the morning...then becoming east 10 to 15 knots late in
the afternoon veering to the south late in the evening. waves
1 to 3 feet building to 2 to 4 feet late in the evening. 
.monday...south winds 10 to 15 knots. waves 3 to 5 feet. 
.tuesday...south winds 10 to 15 knots backing to the southeast
until early morning. waves 2 to 4 feet. 


$$

fzus63 kmkx 090153
glflm 
expires:202505090930;;195855

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
853 pm cdt thu may 8 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 30.3 inches over lake superior will shift
south across lake michigan and wisconsin on friday. a weak cold
front will then follow the high across lake michigan late friday 
night into saturday morning. thus brisk north winds over southern
lake michigan early this evening will diminish later tonight. 
winds will then become light and variable, but will become south 
to southwest ahead of the approaching cold front friday afternoon 
and night. a brief period of northerly gusts behind the weak cold 
front can be expected on saturday. the winds will return to
southerly for sunday. 



lmz080-669-671-673-675-777-779-870-872-874-876-878-090930-
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-
853 pm cdt thu may 8 2025

sheboygan wi to pentwater mi south...

.rest of tonight...north winds 15 to 25 kt becoming northeast
10 to 20 kt late this evening, then becoming east after midnight
diminishing to 10 to 15 kt late. waves 4 to 7 ft occasionally to
9 ft subsiding to 3 to 5 ft. 
.friday...northeast winds 5 to 10 kt backing to northwest. waves
1 to 3 ft subsiding to 1 to 2 ft. 
.friday night...southwest winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 2 ft. 
.saturday...west winds 10 to 20 kt becoming north. waves 1 to
3 ft building to 3 to 5 ft. 
.saturday night...north winds 10 to 20 kt becoming northeast
10 to 15 kt. waves 3 to 5 ft. 
.sunday...southeast winds 10 to 15 kt becoming south 10 to 20 kt.
waves 1 to 3 ft. 
.sunday night...southeast winds 10 to 15 kt becoming south. waves
2 to 4 ft. 
.monday...south winds 10 to 20 kt. waves 2 to 4 ft. 
.tuesday...south winds 10 to 15 kt becoming southeast 10 to
20 kt. waves 2 to 4 ft.  

$$

fzus63 kmkx 090153
glflm 
expires:202505090930;;195854

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
853 pm cdt thu may 8 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 30.3 inches over lake superior will shift
south across lake michigan and wisconsin on friday. a weak cold
front will then follow the high across lake michigan late friday 
night into saturday morning. thus brisk north winds over southern
lake michigan early this evening will diminish later tonight. 
winds will then become light and variable, but will become south 
to southwest ahead of the approaching cold front friday afternoon 
and night. a brief period of northerly gusts behind the weak cold 
front can be expected on saturday. the winds will return to
southerly for sunday. 



lmz261-362-364-366-563-565-567-868-090930-
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-
853 pm cdt thu may 8 2025

sheboygan wi to pentwater mi north...

.rest of tonight...north winds 10 to 20 kt becoming northeast
late this evening, then diminishing to 10 to 15 kt after midnight
diminishing to 5 to 10 kt late. waves 3 to 5 ft subsiding to 1 to
3 ft. 
.friday...north winds less than 10 kt backing to southwest late
in the morning, then becoming 10 to 15 kt early in the afternoon
increasing to 10 to 20 kt late. waves 1 to 2 ft. 
.friday night...southwest winds 10 to 20 kt diminishing to 10 to
15 kt late in the evening, then becoming southwest 10 to 15 kt
after midnight becoming west 5 to 10 kt late. waves 1 to 3 ft. 
.saturday...north winds 10 to 20 kt. waves 1 to 3 ft building to
2 to 4 ft. 
.saturday night...north winds 10 to 20 kt becoming northeast 5 to
10 kt overnight. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.sunday...southeast winds 10 to 15 kt becoming south 10 to 20 kt.
waves 1 to 3 ft. 
.sunday night...south winds 10 to 20 kt. waves 2 to 4 ft building
to 3 to 5 ft. 
.monday...south winds 10 to 20 kt. waves 3 to 5 ft. 
.tuesday...south winds 10 to 20 kt. waves 2 to 4 ft.  

$$

fzus63 kmqt 090201
glfls 
expires:202505090800;;196165

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu may 8 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...30.4 inch high pressure over quebec extends 30.3 inch 
ridging over the lake through tonight, weakening to 30.2 inches 
early friday morning. meanwhile, 29.5 inch low pressure over 
northern manitoba moves into hudson bay friday morning. this low 
passes 30.0 inch troughing over the lake friday evening. in the wake 
of the trough, 30.3 inch high pressure moves from manitoba to 
northern ontario friday evening, building to 30.4 inches over lake 
superior by saturday afternoon. this high slowly pushes towards the 
lower great lakes sunday afternoon as a 29.5 inch low pressure forms 
over the northern plains. as the high shifts off the atlantic coast 
monday, low pressure over the northern plains deepens to 29.3 
inches. expect troughing of around 29.8 inches to develop over lake 
superior by tuesday evening.



lsz162-090800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt thu may 8 2025 /901 pm cdt thu may 8 2025/

.rest of tonight...northeast winds 5 to 15 knots veering
southwest late. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. a slight chance of rain showers by mid
afternoon. waves calm to 2 feet. 
.friday night...northwest winds 10 to 20 knots veering northeast
late. waves calm to 2 feet. 
.saturday...northeast winds 10 to 20 knots veering east by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots. waves calm to 2 feet.
.sunday...south winds 10 to 20 knots. waves building to 1 to
3 feet. 
.sunday night...southwest winds 15 to 25 knots. waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.monday...southwest winds 15 to 25 knots becoming south 10 to
20 knots. waves subsiding to 2 to 4 feet. 
.tuesday...south winds 10 to 20 knots. waves subsiding to calm to
2 feet. 

$$

fzus63 kmqt 090201
glfls 
expires:202505090800;;196166

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu may 8 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...30.4 inch high pressure over quebec extends 30.3 inch 
ridging over the lake through tonight, weakening to 30.2 inches 
early friday morning. meanwhile, 29.5 inch low pressure over 
northern manitoba moves into hudson bay friday morning. this low 
passes 30.0 inch troughing over the lake friday evening. in the wake 
of the trough, 30.3 inch high pressure moves from manitoba to 
northern ontario friday evening, building to 30.4 inches over lake 
superior by saturday afternoon. this high slowly pushes towards the 
lower great lakes sunday afternoon as a 29.5 inch low pressure forms 
over the northern plains. as the high shifts off the atlantic coast 
monday, low pressure over the northern plains deepens to 29.3 
inches. expect troughing of around 29.8 inches to develop over lake 
superior by tuesday evening.



lsz263-090800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
1001 pm edt thu may 8 2025

.rest of tonight...east winds 5 to 15 knots becoming southeast
less than 10 knots after midnight, then becoming south 5 to
15 knots late. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. a slight chance of rain showers by mid
afternoon. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.friday night...west winds 5 to 15 knots becoming north 10 to
20 knots after midnight, then veering northeast late. waves
building to 2 to 4 feet. 
.saturday...northeast winds 5 to 15 knots veering east by mid
afternoon. waves subsiding to calm to 2 feet. 
.saturday night...east winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.sunday...south winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves building to 1 to 3 feet. 
.sunday night...south winds 10 to 20 knots veering southwest
after midnight. waves building to 3 to 6 feet occasionally to
8 feet. 
.monday...southwest winds 10 to 20 knots backing south. waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...south winds 5 to 15 knots. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 

$$

fzus63 kmqt 090201
glfls 
expires:202505090800;;196167

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu may 8 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...30.4 inch high pressure over quebec extends 30.3 inch 
ridging over the lake through tonight, weakening to 30.2 inches 
early friday morning. meanwhile, 29.5 inch low pressure over 
northern manitoba moves into hudson bay friday morning. this low 
passes 30.0 inch troughing over the lake friday evening. in the wake 
of the trough, 30.3 inch high pressure moves from manitoba to 
northern ontario friday evening, building to 30.4 inches over lake 
superior by saturday afternoon. this high slowly pushes towards the 
lower great lakes sunday afternoon as a 29.5 inch low pressure forms 
over the northern plains. as the high shifts off the atlantic coast 
monday, low pressure over the northern plains deepens to 29.3 
inches. expect troughing of around 29.8 inches to develop over lake 
superior by tuesday evening.



lsz264-090800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt thu may 8 2025

.rest of tonight...southeast winds less than 10 knots becoming
south 5 to 15 knots after midnight. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. a slight chance of rain showers by mid afternoon. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.friday night...north winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 2 to 4 feet. 
.saturday...north winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.saturday night...south winds 5 to 15 knots backing southeast
after midnight. waves calm to 2 feet. 
.sunday...south winds 10 to 20 knots. waves building to 2 to
4 feet. 
.sunday night...south winds 10 to 20 knots veering southwest
after midnight. waves building to 3 to 6 feet occasionally to
8 feet. 
.monday...southwest winds 10 to 20 knots backing south. waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...south winds 5 to 15 knots increasing to 10 to
20 knots. waves subsiding to 1 to 3 feet, then building to 2 to
4 feet. 

$$

fzus63 kmqt 090201
glfls 
expires:202505090800;;196168

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu may 8 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...30.4 inch high pressure over quebec extends 30.3 inch 
ridging over the lake through tonight, weakening to 30.2 inches 
early friday morning. meanwhile, 29.5 inch low pressure over 
northern manitoba moves into hudson bay friday morning. this low 
passes 30.0 inch troughing over the lake friday evening. in the wake 
of the trough, 30.3 inch high pressure moves from manitoba to 
northern ontario friday evening, building to 30.4 inches over lake 
superior by saturday afternoon. this high slowly pushes towards the 
lower great lakes sunday afternoon as a 29.5 inch low pressure forms 
over the northern plains. as the high shifts off the atlantic coast 
monday, low pressure over the northern plains deepens to 29.3 
inches. expect troughing of around 29.8 inches to develop over lake 
superior by tuesday evening.



lsz265-090800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt thu may 8 2025

.rest of tonight...southeast winds 5 to 15 knots veering south
late. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots becoming southeast 10 to
20 knots late. waves calm to 2 feet. 
.friday night...south winds 5 to 15 knots becoming north 10 to
20 knots after midnight, then increasing to 15 to 25 knots late.
waves building to 2 to 4 feet. 
.saturday...north winds 15 to 25 knots diminishing to 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.saturday night...south winds 5 to 15 knots backing southeast
after midnight. waves calm to 2 feet. 
.sunday...southeast winds 10 to 20 knots becoming south 15 to
25 knots by mid afternoon. waves building to 1 to 3 feet. 
.sunday night...south winds 15 to 25 knots veering southwest
after midnight. waves 1 to 3 feet. 
.monday...south winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.tuesday...south winds 15 to 25 knots diminishing to 10 to
20 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 

$$

fzus63 kmqt 090201
glfls 
expires:202505090800;;196169

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu may 8 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...30.4 inch high pressure over quebec extends 30.3 inch 
ridging over the lake through tonight, weakening to 30.2 inches 
early friday morning. meanwhile, 29.5 inch low pressure over 
northern manitoba moves into hudson bay friday morning. this low 
passes 30.0 inch troughing over the lake friday evening. in the wake 
of the trough, 30.3 inch high pressure moves from manitoba to 
northern ontario friday evening, building to 30.4 inches over lake 
superior by saturday afternoon. this high slowly pushes towards the 
lower great lakes sunday afternoon as a 29.5 inch low pressure forms 
over the northern plains. as the high shifts off the atlantic coast 
monday, low pressure over the northern plains deepens to 29.3 
inches. expect troughing of around 29.8 inches to develop over lake 
superior by tuesday evening.



lsz266-090800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
1001 pm edt thu may 8 2025

.rest of tonight...southeast winds less than 10 knots becoming
south 5 to 15 knots after midnight. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots backing southeast late. a
slight chance of rain showers by mid afternoon. waves calm to
2 feet. 
.friday night...south winds 5 to 15 knots becoming north 10 to
20 knots after midnight, then increasing to 15 to 25 knots late.
waves building to 2 to 4 feet. 
.saturday...north winds 10 to 20 knots becoming northwest 5 to
15 knots by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet. 
.saturday night...northwest winds 5 to 15 knots backing south
after midnight. waves subsiding to calm to 2 feet. 
.sunday...south winds 15 to 25 knots. waves building to 2 to
4 feet. 
.sunday night...south winds 20 to 30 knots becoming southwest
15 to 25 knots after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.monday...south winds 15 to 25 knots. waves subsiding to 2 to
4 feet, then building to 3 to 5 feet occasionally to 7 feet. 
.tuesday...south winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to 1 to 3 feet, then building to 2 to
4 feet. 

$$

fzus63 kmqt 090201
glfls 
expires:202505090800;;196170

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu may 8 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...30.4 inch high pressure over quebec extends 30.3 inch 
ridging over the lake through tonight, weakening to 30.2 inches 
early friday morning. meanwhile, 29.5 inch low pressure over 
northern manitoba moves into hudson bay friday morning. this low 
passes 30.0 inch troughing over the lake friday evening. in the wake 
of the trough, 30.3 inch high pressure moves from manitoba to 
northern ontario friday evening, building to 30.4 inches over lake 
superior by saturday afternoon. this high slowly pushes towards the 
lower great lakes sunday afternoon as a 29.5 inch low pressure forms 
over the northern plains. as the high shifts off the atlantic coast 
monday, low pressure over the northern plains deepens to 29.3 
inches. expect troughing of around 29.8 inches to develop over lake 
superior by tuesday evening.



lsz267-090800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt thu may 8 2025

.rest of tonight...northwest winds 5 to 15 knots backing
southwest late. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots backing southeast late. waves
calm to 2 feet. 
.friday night...southeast winds 5 to 15 knots backing north after
midnight, then increasing to 10 to 20 knots late. a slight chance
of rain showers through midnight. waves building to 1 to 3 feet. 
.saturday...north winds 10 to 20 knots backing northwest by mid
afternoon. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.saturday night...northwest winds 5 to 15 knots backing southeast
after midnight. waves subsiding to calm to 2 feet. 
.sunday...southeast winds 10 to 20 knots becoming south 15 to
25 knots by mid afternoon. waves building to 2 to 4 feet. 
.sunday night...south winds 15 to 25 knots. waves building to
3 to 6 feet occasionally to 8 feet. 
.monday...south winds 15 to 25 knots. waves subsiding to 2 to
4 feet, then building to 3 to 5 feet occasionally to 7 feet. 
.tuesday...south winds 10 to 20 knots. waves subsiding to 1 to
3 feet, then building to 2 to 4 feet. 

$$