fzus61 kbuf 122011
glflo 
expires:202503130315;;033659

open lake forecast for lake ontario
national weather service buffalo ny
411 pm edt wed mar 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 30.2 inch high across the lake tonight will slide
east across the canadian maritimes thursday. a 28.8 inch low over
the plains states friday will then lift northeast to lake 
superior friday night and saturday, then to james bay on sunday. 
the low will push its trailing cold front across the lake sunday.
a 30.4 inch high will then build across the southeastern states,
ridging northward across the lower great lakes on monday.


loz062-130315-
lake ontario open waters from the niagara river to hamlin beach-
411 pm edt wed mar 12 2025

.tonight...east winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.thursday...east winds 5 to 15 knots becoming northeast less than
10 knots. waves 1 to 3 feet. 
.thursday night...northeast winds less than 10 knots becoming
east. waves 1 foot or less. 
.friday...east winds 5 to 15 knots. waves 2 feet or less. 
.friday night...east winds 10 to 15 knots becoming southeast.
waves 1 to 3 feet. 
.saturday...southeast winds 15 to 20 knots becoming south.
showers. waves 1 to 3 feet building to 2 to 4 feet. 
.sunday...south winds 15 to 25 knots becoming west. rain showers
during the day, then a chance of rain showers sunday night. waves
3 to 6 feet. 
.monday...west winds 15 to 20 knots becoming southwest 10 to
15 knots. waves 2 to 4 feet. 

$$

fzus61 kbuf 122011
glflo 
expires:202503130315;;033660

open lake forecast for lake ontario
national weather service buffalo ny
411 pm edt wed mar 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 30.2 inch high across the lake tonight will slide
east across the canadian maritimes thursday. a 28.8 inch low over
the plains states friday will then lift northeast to lake 
superior friday night and saturday, then to james bay on sunday. 
the low will push its trailing cold front across the lake sunday.
a 30.4 inch high will then build across the southeastern states,
ridging northward across the lower great lakes on monday.


loz063>065-130315-
lake ontario open waters from hamlin beach to the saint lawrence
river-
411 pm edt wed mar 12 2025

.tonight...northeast winds 15 to 20 knots becoming east 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.thursday...east winds 5 to 15 knots becoming northeast. waves
1 to 3 feet. 
.thursday night...northeast winds 10 knots or less becoming
southeast. waves 1 foot or less. 
.friday...southeast winds 5 to 15 knots. waves 2 feet or less. 
.friday night...southeast winds 10 to 15 knots increasing to
15 to 20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday...southeast winds 15 to 25 knots. a chance of showers
during the day, then showers likely saturday night. waves 2 to
4 feet building to 3 to 6 feet. 
.sunday...south winds to 30 knots becoming west and diminishing
to 15 to 20 knots. rain showers. waves 4 to 7 feet subsiding to
3 to 6 feet. waves occasionally around 9 feet. 
.monday...west winds 15 to 20 knots becoming southwest 10 to
15 knots. waves 2 to 4 feet building to 3 to 5 feet, then
subsiding to 2 to 4 feet. 

$$

fzus61 kcle 122003
glfle 
expires:202503130230;;032618

open lake forecast for lake erie
national weather service cleveland oh
403 pm edt wed mar 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...
high pressure 30.00 inches over quebec will maintain a ridge 
across lake erie through thursday before shifting to the east 
coast on friday. low pressure 28.90 inches will approach the 
upper midwest by saturday lifting a warm front north across lake 
erie friday night and early saturday. this low will continue 
northeast towards james bay while a secondary low pressure 29.20 
inches tracks north across western lake erie saturday night. a 
cold front will sweep east across lake erie behind this system 
sunday morning, with high pressure 30.10 inches building in sunday
night and monday.


lez164>168-130230-
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-geneva-on-
the-lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
403 pm edt wed mar 12 2025

.tonight...northeast winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 6 feet subsiding to 1 to 3 feet. 
.thursday...northeast winds 5 to 10 knots. waves 1 to 3 feet
subsiding to 1 foot or less. 
.thursday night...east winds 5 to 10 knots. waves 2 feet or less.
.friday...east winds 5 to 15 knots becoming southeast. waves
2 feet or less. 
.friday night...southeast winds 10 to 15 knots increasing to
15 to 25 knots. a chance of showers overnight. waves 1 to 3 feet
building to 3 to 6 feet. 
.saturday...south winds 20 to 25 knots. showers during the day,
then showers with a chance of thunderstorms saturday night. waves
4 to 7 feet. waves occasionally around 9 feet. 
.sunday...southwest winds 15 to 25 knots becoming west. rain
showers likely during the day. waves 4 to 7 feet subsiding to
3 to 6 feet. waves occasionally around 9 feet. 
.monday...west winds 15 to 20 knots becoming southwest. waves
3 to 5 feet subsiding to 2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 122003
glfle 
expires:202503130230;;032617

open lake forecast for lake erie
national weather service cleveland oh
403 pm edt wed mar 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...
high pressure 30.00 inches over quebec will maintain a ridge 
across lake erie through thursday before shifting to the east 
coast on friday. low pressure 28.90 inches will approach the 
upper midwest by saturday lifting a warm front north across lake 
erie friday night and early saturday. this low will continue 
northeast towards james bay while a secondary low pressure 29.20 
inches tracks north across western lake erie saturday night. a 
cold front will sweep east across lake erie behind this system 
sunday morning, with high pressure 30.10 inches building in sunday
night and monday.


lez162-163-130230-
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-
403 pm edt wed mar 12 2025

.tonight...northeast winds 5 to 15 knots. waves 3 to 5 feet
subsiding to 1 to 3 feet. 
.thursday...northeast winds 5 to 10 knots becoming east. waves
2 feet or less. 
.thursday night...east winds 5 to 10 knots. waves 1 foot or less.
.friday...east winds 5 to 15 knots becoming southeast. waves
2 feet or less. 
.friday night...southeast winds 10 to 15 knots becoming south and
increasing to 15 to 25 knots. showers likely overnight. waves
1 to 3 feet building to 3 to 5 feet. 
.saturday...south winds 20 to 25 knots. showers. waves 3 to
5 feet subsiding to 2 to 4 feet. 
.sunday...southwest winds 15 to 20 knots becoming west. a chance
of rain showers during the day. waves 2 to 4 feet subsiding to
1 to 3 feet. 
.monday...west winds 15 to 20 knots becoming southwest. waves
1 to 3 feet. 

$$

fzus61 kcle 122003
glfle 
expires:202503130230;;032619

open lake forecast for lake erie
national weather service cleveland oh
403 pm edt wed mar 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...
high pressure 30.00 inches over quebec will maintain a ridge 
across lake erie through thursday before shifting to the east 
coast on friday. low pressure 28.90 inches will approach the 
upper midwest by saturday lifting a warm front north across lake 
erie friday night and early saturday. this low will continue 
northeast towards james bay while a secondary low pressure 29.20 
inches tracks north across western lake erie saturday night. a 
cold front will sweep east across lake erie behind this system 
sunday morning, with high pressure 30.10 inches building in sunday
night and monday.


lez061-169-130230-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
403 pm edt wed mar 12 2025

.tonight...northeast winds 15 to 20 knots diminishing to 5 to
15 knots. the lake is mostly ice covered.
.thursday...northeast winds 10 knots or less. 
.thursday night...northeast winds 10 knots or less becoming east.
.friday...east winds 5 to 10 knots becoming southeast. 
.friday night...southeast winds 10 to 15 knots becoming south
15 to 20 knots. 
.saturday...south winds 15 to 25 knots. showers.
.sunday...south winds 15 to 25 knots becoming west. rain showers
during the day. 
.monday...west winds 10 to 15 knots becoming southwest. 

winds and waves higher in and near thunderstorms.

waves omitted due to the lake being mostly ice covered.

$$

fzus63 kdtx 121938
glflh 
expires:202503130345;;031355

open lake forecast for lake huron
national weather service detroit/pontiac mi
338 pm edt wed mar 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...high pressure, 30.20 inches, over quebec will move to
the canadian maritimes by thursday morning. a ridge of high
pressure, 30.10 inches, will extend across the eastern great
lakes through this time period. this will result in relatively
tranquil weather conditions. deepening low pressure is then
forecast to move from the central plains friday into the western
great lakes saturday. this system will result in windy conditions
and periodic showers through the weekend.


lhz462>464-130345-
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-
338 pm edt wed mar 12 2025

.tonight...northeast winds 5 to 10 knots veering to the east in
the late evening and early morning...then becoming light and
variable early in the morning. waves 1 to 3 feet. 
.thursday...light and variable winds. waves 2 feet or less. 
.thursday night...northeast winds 5 to 10 knots veering to the
southeast in the late evening and overnight. waves 2 feet or
less. 
.friday...southeast winds 10 to 15 knots. waves 1 to 3 feet
building to 2 to 4 feet early in the afternoon. 
.friday night...southeast winds 15 to 20 knots increasing to
20 to 25 knots with gusts to around 30 knots in the late evening
and overnight. a chance of showers after midnight. waves 4 to
6 feet building to 6 to 9 feet after midnight. waves occasionally
around 12 feet. 
.saturday...southeast winds 20 to 25 knots with gusts to around
30 knots becoming south to 30 knots late in the morning...then
decreasing to 15 to 20 knots late in the evening. a chance of
showers...then showers likely late in the evening. waves 8 to
12 feet. waves occasionally around 15 feet. 
.sunday...south winds 15 to 20 knots veering to the west. a
chance of showers. waves 4 to 6 feet. waves occasionally around
8 feet. 
.monday...west winds 15 to 20 knots becoming southwest 10 to
15 knots early in the evening...then backing to the south in the
late evening and early morning. waves 3 to 5 feet. 


$$

fzus63 kdtx 121938
glflh 
expires:202503130345;;031353

open lake forecast for lake huron
national weather service detroit/pontiac mi
338 pm edt wed mar 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...high pressure, 30.20 inches, over quebec will move to
the canadian maritimes by thursday morning. a ridge of high
pressure, 30.10 inches, will extend across the eastern great
lakes through this time period. this will result in relatively
tranquil weather conditions. deepening low pressure is then
forecast to move from the central plains friday into the western
great lakes saturday. this system will result in windy conditions
and periodic showers through the weekend.


lhz361-130345-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
338 pm edt wed mar 12 2025

.tonight...southeast winds 10 to 15 knots decreasing to 5 to
10 knots after midnight. waves 2 to 4 feet subsiding to 1 to
3 feet after midnight. 
.thursday...light and variable winds becoming east 5 to 10 knots
late in the afternoon. waves 2 feet or less. 
.thursday night...southeast winds 5 to 10 knots increasing to
10 to 15 knots after midnight. waves 2 feet or less. 
.friday...east winds 10 to 15 knots. waves 1 to 3 feet building
to 2 to 4 feet in the late morning and afternoon. 
.friday night...east winds 10 to 15 knots increasing to 15 to
20 knots in the late evening and overnight. a chance of showers
and thunderstorms after midnight. waves 4 to 6 feet building to
6 to 9 feet after midnight. waves occasionally around 12 feet. 
.saturday...southeast winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots late in the afternoon...
then becoming south 10 to 15 knots late in the evening. a chance
of thunderstorms in the morning. a chance of showers. waves 8 to
12 feet. waves occasionally around 15 feet. 
.sunday...southeast winds 10 to 15 knots becoming west 15 to
20 knots. a chance of showers. a chance of snow showers until
early evening. waves 4 to 6 feet. 
.monday...west winds 15 to 20 knots decreasing to 10 to 15 knots
in the late morning and early afternoon...then backing to the
southwest until early morning. waves 3 to 5 feet subsiding to
1 to 3 feet in the late evening and early morning. waves
occasionally around 8 feet. 


$$

fzus63 kdtx 121938
glfsc 
expires:202503130345;;031359

lake st clair forecast
national weather service detroit/pontiac mi
338 pm edt wed mar 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...high pressure, 30.20 inches, over quebec will move to
the canadian maritimes by thursday morning. a ridge of high
pressure, 30.10 inches, will extend across the eastern great
lakes through this time period. this will result in relatively
tranquil weather conditions. deepening low pressure is then
forecast to move from the central plains friday into the western
great lakes saturday. this system will result in windy conditions
and periodic showers through the weekend.


lcz460-130345-
lake st clair-
338 pm edt wed mar 12 2025

.tonight...northeast winds 5 to 10 knots until early morning
becoming light and variable. clear. waves 2 feet or less.
.thursday...light and variable winds. sunny. waves 2 feet or less.
.thursday night...light and variable winds becoming east 5 to 10
knots in the late evening and overnight. mostly clear. waves 2 feet
or less.
.friday...southeast winds 5 to 10 knots increasing to 10 to 15 knots
early in the afternoon. partly sunny. waves 2 feet or less.
.friday night...southeast winds 15 to 20 knots increasing to 20 to
25 knots after midnight. partly cloudy in the evening.. then mostly
cloudy with showers likely after midnight. waves 1 to 3 feet
building to 2 to 4 feet after midnight.
.saturday...south winds to 30 knots. mostly cloudy becoming partly
sunny in the afternoon. waves 3 to 5 feet. waves occasionally around
7 feet. a small craft advisory may be needed.
.sunday...west winds 20 to 25 knots. mostly cloudy. light showers
and a chance of thunderstorms. waves 2 to 4 feet.
.monday...southwest winds 15 to 20 knots. partly cloudy. waves 2
feet or less.

$$

fzus63 kdtx 121938
glflh 
expires:202503130345;;031354

open lake forecast for lake huron
national weather service detroit/pontiac mi
338 pm edt wed mar 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...high pressure, 30.20 inches, over quebec will move to
the canadian maritimes by thursday morning. a ridge of high
pressure, 30.10 inches, will extend across the eastern great
lakes through this time period. this will result in relatively
tranquil weather conditions. deepening low pressure is then
forecast to move from the central plains friday into the western
great lakes saturday. this system will result in windy conditions
and periodic showers through the weekend.


lhz362-363-130345-
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-
338 pm edt wed mar 12 2025

.tonight...east winds 5 to 10 knots veering to the southeast
after midnight. waves 1 to 3 feet. 
.thursday...light and variable winds becoming southeast 5 to
10 knots. waves 2 feet or less. 
.thursday night...southeast winds 5 to 10 knots. waves 2 feet or
less. 
.friday...southeast winds 10 to 15 knots. waves 1 to 3 feet
building to 2 to 4 feet in the late morning and afternoon. 
.friday night...southeast winds 15 to 20 knots increasing to
20 to 25 knots with gusts to around 30 knots after midnight. a
chance of showers and thunderstorms after midnight. waves 4 to
6 feet building to 6 to 9 feet after midnight. waves occasionally
around 12 feet. 
.saturday...southeast winds 20 to 25 knots with gusts to around
30 knots becoming south to 30 knots with gusts to 35 knot gales
late in the morning...then becoming southeast 20 to 25 knots with
gusts to around 30 knots late in the afternoon becoming south
15 to 20 knots late in the evening. a chance of showers and
thunderstorms in the morning...then a chance of showers. waves
10 to 14 feet. waves occasionally around 18 feet. 
.sunday...southeast winds 10 to 15 knots becoming west 15 to
20 knots. a chance of showers. a chance of snow showers until
early evening. waves 5 to 7 feet. waves occasionally around
10 feet. 
.monday...west winds 15 to 20 knots becoming south 10 to 15 knots
until early morning. waves 4 to 6 feet. waves occasionally around
8 feet. 


$$

fzus63 kmkx 121919
glflm 
expires:202503130315;;030633

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
219 pm cdt wed mar 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...

30.1 inch high pressure will progress into the saint lawrence 
valley tonight as a weak area of 29.7 inch low pressure 
concurrently moves toward the southern hudson bay. light 
southeasterly winds will thus become established over the northern
half of the open waters this evening, with easterly winds 
persisting further south. a broad area of 29.2 inch low pressure 
will migrate into the northern rocky mountains on thursday, 
allowing southeasterly breezes to become established across the 
entirety of lake michigan.

a strong area of low pressure near 28.9 inches will form in the 
central great plains on friday, quickly progressing into the upper
mississippi valley by dawn saturday. gusty southeast winds will 
develop ahead of the approaching low by friday evening, when 
widespread gusts between 25-30 knots are expected across all of 
the open waters. these gusts will continue into the first half of 
saturday evening as the low pressure center moves from northern 
wisconsin to ontario. thunderstorms will accompany the approaching
low late friday night, with rain showers continuing into saturday.
severe weather is not expected at this time. gusts between 30-35+
knots are possible late friday night through saturday. trends 
will be monitored for potential gale watches or warnings in the 
coming forecasts. winds will shift out of the west-northwest 
by early sunday morning as a front crosses the open waters. 20-25
knot gusts will continue into sunday afternoon, gradually 
tapering sunday night.


lmz261-362-364-366-563-565-567-868-130315-
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-
219 pm cdt wed mar 12 2025

sheboygan wi to pentwater mi north...

.tonight...northeast winds 10 to 15 kt veering to south. waves
1 to 2 ft. 
.thursday...south winds 5 to 10 kt increasing to 10 to 15 kt,
then becoming southeast late. waves 1 ft or less. 
.thursday night...southeast winds 5 to 10 kt increasing to 10 to
20 kt. waves 1 to 2 ft building to 2 to 4 ft. 
.friday...southeast winds 10 to 20 kt increasing to 15 to 25 kt.
waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft. 
.friday night...southeast winds to 30 kt. chance of rain in the
evening, then rain overnight. waves 4 to 7 ft occasionally to
9 ft building to 5 to 8 ft occasionally to 10 ft. 
.saturday...southeast winds to 30 kt becoming south. rain likely
in the morning, then chance of rain in the afternoon. waves 7 to
10 ft occasionally to 13 ft building to 8 to 12 ft occasionally
to 16 ft. 
.saturday night...southwest winds to 30 kt. chance of rain. waves
8 to 11 ft occasionally to 14 ft subsiding to 5 to 8 ft
occasionally to 10 ft. 
.sunday...west winds 15 to 25 kt. chance of snow and rain. waves
4 to 6 ft occasionally to 8 ft. 
.monday...west winds 10 to 20 kt becoming southwest. waves 3 to
5 ft.  

$$

fzus63 kmkx 121919
glflm 
expires:202503130315;;030634

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
219 pm cdt wed mar 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...

30.1 inch high pressure will progress into the saint lawrence 
valley tonight as a weak area of 29.7 inch low pressure 
concurrently moves toward the southern hudson bay. light 
southeasterly winds will thus become established over the northern
half of the open waters this evening, with easterly winds 
persisting further south. a broad area of 29.2 inch low pressure 
will migrate into the northern rocky mountains on thursday, 
allowing southeasterly breezes to become established across the 
entirety of lake michigan.

a strong area of low pressure near 28.9 inches will form in the 
central great plains on friday, quickly progressing into the upper
mississippi valley by dawn saturday. gusty southeast winds will 
develop ahead of the approaching low by friday evening, when 
widespread gusts between 25-30 knots are expected across all of 
the open waters. these gusts will continue into the first half of 
saturday evening as the low pressure center moves from northern 
wisconsin to ontario. thunderstorms will accompany the approaching
low late friday night, with rain showers continuing into saturday.
severe weather is not expected at this time. gusts between 30-35+
knots are possible late friday night through saturday. trends 
will be monitored for potential gale watches or warnings in the 
coming forecasts. winds will shift out of the west-northwest 
by early sunday morning as a front crosses the open waters. 20-25
knot gusts will continue into sunday afternoon, gradually 
tapering sunday night.


lmz080-669-671-673-675-777-779-870-872-874-876-878-130315-
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-
219 pm cdt wed mar 12 2025

sheboygan wi to pentwater mi south...

.tonight...northeast winds 5 to 10 kt becoming east. waves 1 to
3 ft subsiding to 1 ft or less. 
.thursday...east winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.thursday night...east winds 5 to 10 kt becoming southeast 10 to
15 kt late in the evening, then increasing to 10 to 20 kt after
midnight becoming southeast 10 to 20 kt late. waves 1 to 2 ft
building to 2 to 4 ft. 
.friday...southeast winds 10 to 20 kt increasing to 15 to 25 kt.
waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft. 
.friday night...southeast winds to 30 kt. chance of rain and
thunderstorms in the evening, then rain overnight. waves 4 to
7 ft occasionally to 9 ft building to 5 to 8 ft occasionally to
10 ft. 
.saturday...south gales to 35 kt. chance of rain in the morning. 
waves 8 to 11 ft occasionally to 14 ft building to 8 to 12 ft 
occasionally to 16 ft. 
.saturday night...southwest winds to 30 kt becoming west 15 to
25 kt. chance of rain. waves 7 to 10 ft occasionally to 13 ft
subsiding to 4 to 7 ft occasionally to 9 ft. 
.sunday...west winds 15 to 25 kt. chance of snow and rain. waves
4 to 7 ft occasionally to 9 ft. 
.monday...west winds 10 to 20 kt becoming south. waves 3 to 5 ft.
 

$$

fzus63 kmqt 121947
glfls 
expires:202503130400;;031862

open lake forecast for lake superior
national weather service marquette mi
347 pm edt wed mar 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...weak pressure gradient across lake superior this
afternoon as 30.1 high pressure over southern quebec is opposed by
29.5 inch high pressure over western montana. a 29.7 inch low
passing over far northern ontario overnight tonight will pass a
weak 29.9 inch trough over the lake. through the day thursday, the
gradient sharpens somewhat as 30.3 inch high pressure over the
canadian maritimes is opposed by 29.2 inch low pressure over the
high plains. by friday morning, a 29.0 inch colorado low will move
over the central plains, deepening to 28.9 inches over kansas by
friday night, opposing 30.2 inch high pressure over quebec.
through the day saturday, this low will weaken slightly as it
approaches lake superior in the evening at around 29.1 inches. the
low will roughly maintain strength as it reaches the shores of
hudson bay by sunday afternoon with 30.1 inch high pressure
filling in over the southern plains. this high will pass a 30.0
inch ridge over the lake by monday morning as a 29.6 inch low
approaches the western end of the lake by the evening hours of
monday.


lsz267-130400-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
347 pm edt wed mar 12 2025

.late this afternoon...southeast winds 10 to 20 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.tonight...south winds 10 to 20 knots veering southwest late.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots backing southeast late.
waves calm to 2 feet. 
.thursday night...southeast winds 10 to 20 knots increasing to
15 to 25 knots late. waves building to 2 to 4 feet. 
.friday...southeast winds 15 to 25 knots. waves building to 3 to
5 feet occasionally to 7 feet. 
.friday night...southeast winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a chance of rain showers after
midnight. waves building to 3 to 6 feet occasionally to 8 feet. 
.saturday...southeast winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. rain showers. waves subsiding to 3 to
5 feet occasionally to 7 feet. 
.saturday night...south winds 15 to 25 knots veering west after
midnight. a chance of rain showers. waves subsiding to 2 to
4 feet. 
.sunday...northwest gales to 35 knots diminishing to 20 to
30 knots. a chance of rain showers. a chance of snow showers.
waves building to 9 to 12 feet occasionally to 15 feet, then
subsiding to 5 to 8 feet occasionally to 10 feet. 
.monday...west winds 15 to 25 knots becoming southwest 10 to
20 knots. waves subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 121947
glfls 
expires:202503130400;;031861

open lake forecast for lake superior
national weather service marquette mi
347 pm edt wed mar 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...weak pressure gradient across lake superior this
afternoon as 30.1 high pressure over southern quebec is opposed by
29.5 inch high pressure over western montana. a 29.7 inch low
passing over far northern ontario overnight tonight will pass a
weak 29.9 inch trough over the lake. through the day thursday, the
gradient sharpens somewhat as 30.3 inch high pressure over the
canadian maritimes is opposed by 29.2 inch low pressure over the
high plains. by friday morning, a 29.0 inch colorado low will move
over the central plains, deepening to 28.9 inches over kansas by
friday night, opposing 30.2 inch high pressure over quebec.
through the day saturday, this low will weaken slightly as it
approaches lake superior in the evening at around 29.1 inches. the
low will roughly maintain strength as it reaches the shores of
hudson bay by sunday afternoon with 30.1 inch high pressure
filling in over the southern plains. this high will pass a 30.0
inch ridge over the lake by monday morning as a 29.6 inch low
approaches the western end of the lake by the evening hours of
monday.


lsz266-130400-
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-
347 pm edt wed mar 12 2025

.late this afternoon...south winds 10 to 20 knots. waves 1 to
3 feet. 
.tonight...south winds 10 to 20 knots becoming southwest 5 to
15 knots late. waves subsiding to calm to 2 feet. 
.thursday...west winds 5 to 15 knots backing east late. waves
calm to 2 feet. 
.thursday night...southeast winds 10 to 20 knots increasing to
15 to 25 knots late. waves building to 3 to 5 feet occasionally
to 7 feet. 
.friday...southeast winds 15 to 25 knots. waves subsiding to 2 to
4 feet, then building to 3 to 5 feet occasionally to 7 feet. 
.friday night...southeast winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a chance of rain showers after
midnight. waves building to 3 to 6 feet occasionally to 8 feet. 
.saturday...southeast winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. rain showers likely. waves building to
4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.saturday night...south winds 15 to 25 knots veering west after
midnight. a chance of rain showers. waves subsiding to 3 to
6 feet occasionally to 8 feet. 
.sunday...northwest gales to 35 knots diminishing to 20 to
30 knots. a chance of rain showers. a chance of snow showers.
waves building to 9 to 12 feet occasionally to 15 feet, then
subsiding to 5 to 8 feet occasionally to 10 feet. 
.monday...southwest 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 121947
glfls 
expires:202503130400;;031860

open lake forecast for lake superior
national weather service marquette mi
347 pm edt wed mar 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...weak pressure gradient across lake superior this
afternoon as 30.1 high pressure over southern quebec is opposed by
29.5 inch high pressure over western montana. a 29.7 inch low
passing over far northern ontario overnight tonight will pass a
weak 29.9 inch trough over the lake. through the day thursday, the
gradient sharpens somewhat as 30.3 inch high pressure over the
canadian maritimes is opposed by 29.2 inch low pressure over the
high plains. by friday morning, a 29.0 inch colorado low will move
over the central plains, deepening to 28.9 inches over kansas by
friday night, opposing 30.2 inch high pressure over quebec.
through the day saturday, this low will weaken slightly as it
approaches lake superior in the evening at around 29.1 inches. the
low will roughly maintain strength as it reaches the shores of
hudson bay by sunday afternoon with 30.1 inch high pressure
filling in over the southern plains. this high will pass a 30.0
inch ridge over the lake by monday morning as a 29.6 inch low
approaches the western end of the lake by the evening hours of
monday.


lsz265-130400-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
347 pm edt wed mar 12 2025

.late this afternoon...southeast winds 10 to 20 knots. waves calm
to 2 feet. 
.tonight...south winds 5 to 15 knots veering west late. waves
calm to 2 feet. 
.thursday...west winds 5 to 15 knots backing east late. waves
calm to 2 feet. 
.thursday night...southeast winds 10 to 20 knots. waves building
to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.friday...southeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. waves building to 2 to 4 feet. 
.friday night...southeast winds 15 to 25 knots. a chance of rain
showers after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.saturday...southeast winds 15 to 25 knots. rain showers likely.
waves subsiding to 2 to 4 feet. 
.saturday night...south winds 15 to 25 knots becoming west 20 to
30 knots after midnight. a chance of rain showers. a chance of
snow showers after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.sunday...northwest gales to 35 knots becoming west 20 to
30 knots. a chance of snow showers. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 1 to 3 feet. 
.monday...southwest winds 10 to 20 knots veering west. waves
subsiding to calm to 2 feet. 

$$

fzus63 kmqt 121947
glfls 
expires:202503130400;;031859

open lake forecast for lake superior
national weather service marquette mi
347 pm edt wed mar 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...weak pressure gradient across lake superior this
afternoon as 30.1 high pressure over southern quebec is opposed by
29.5 inch high pressure over western montana. a 29.7 inch low
passing over far northern ontario overnight tonight will pass a
weak 29.9 inch trough over the lake. through the day thursday, the
gradient sharpens somewhat as 30.3 inch high pressure over the
canadian maritimes is opposed by 29.2 inch low pressure over the
high plains. by friday morning, a 29.0 inch colorado low will move
over the central plains, deepening to 28.9 inches over kansas by
friday night, opposing 30.2 inch high pressure over quebec.
through the day saturday, this low will weaken slightly as it
approaches lake superior in the evening at around 29.1 inches. the
low will roughly maintain strength as it reaches the shores of
hudson bay by sunday afternoon with 30.1 inch high pressure
filling in over the southern plains. this high will pass a 30.0
inch ridge over the lake by monday morning as a 29.6 inch low
approaches the western end of the lake by the evening hours of
monday.


lsz264-130400-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
347 pm edt wed mar 12 2025

.late this afternoon...southeast winds 5 to 15 knots. flurries.
waves calm to 2 feet. 
.tonight...south winds 5 to 15 knots veering west late. waves
calm to 2 feet. 
.thursday...west winds 5 to 15 knots backing southeast late.
waves calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots increasing to
10 to 20 knots late. waves building to 3 to 5 feet occasionally
to 7 feet. 
.friday...southeast winds 10 to 20 knots. a slight chance of rain
showers by mid afternoon. waves subsiding to 2 to 4 feet, then
building to 3 to 5 feet occasionally to 7 feet. 
.friday night...southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. a chance of rain showers. waves
building to 3 to 6 feet occasionally to 8 feet. 
.saturday...southeast winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. rain showers. waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.saturday night...south winds 15 to 25 knots veering west after
midnight. a chance of rain showers. waves subsiding to 3 to
6 feet occasionally to 8 feet. 
.sunday...northwest gales to 35 knots diminishing to 20 to
30 knots. waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 
.monday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. waves subsiding to 1 to 3 feet, then building to 2 to
4 feet. 

$$

fzus63 kmqt 121947
glfls 
expires:202503130400;;031858

open lake forecast for lake superior
national weather service marquette mi
347 pm edt wed mar 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...weak pressure gradient across lake superior this
afternoon as 30.1 high pressure over southern quebec is opposed by
29.5 inch high pressure over western montana. a 29.7 inch low
passing over far northern ontario overnight tonight will pass a
weak 29.9 inch trough over the lake. through the day thursday, the
gradient sharpens somewhat as 30.3 inch high pressure over the
canadian maritimes is opposed by 29.2 inch low pressure over the
high plains. by friday morning, a 29.0 inch colorado low will move
over the central plains, deepening to 28.9 inches over kansas by
friday night, opposing 30.2 inch high pressure over quebec.
through the day saturday, this low will weaken slightly as it
approaches lake superior in the evening at around 29.1 inches. the
low will roughly maintain strength as it reaches the shores of
hudson bay by sunday afternoon with 30.1 inch high pressure
filling in over the southern plains. this high will pass a 30.0
inch ridge over the lake by monday morning as a 29.6 inch low
approaches the western end of the lake by the evening hours of
monday.


lsz263-130400-
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-
347 pm edt wed mar 12 2025

.late this afternoon...east winds less than 10 knots. waves calm
to 2 feet. 
.tonight...east winds less than 10 knots becoming southwest 5 to
15 knots after midnight, then veering west late. waves calm to
2 feet. 
.thursday...west winds 5 to 15 knots diminishing to less than
10 knots in the afternoon, then becoming east 5 to 15 knots late.
waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots veering southeast
after midnight. waves building to 2 to 4 feet, then subsiding to
1 to 3 feet. 
.friday...southeast winds 10 to 20 knots becoming east 15 to
25 knots by mid afternoon. a slight chance of rain showers. waves
building to 2 to 4 feet. 
.friday night...east winds 15 to 25 knots increasing to 20 to
30 knots after midnight. a chance of rain showers. waves building
to 3 to 5 feet occasionally to 7 feet. 
.saturday...east winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. rain showers. waves building to 3 to
6 feet occasionally to 8 feet. 
.saturday night...northwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. a chance of rain and snow
showers. waves subsiding to 2 to 4 feet, then building to 4 to
7 feet occasionally to 9 feet. 
.sunday...northwest gales to 35 knots becoming west 20 to
30 knots. waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet. 
.monday...southwest winds 10 to 20 knots becoming north 5 to
15 knots. waves subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 121947
glfls 
expires:202503130400;;031857

open lake forecast for lake superior
national weather service marquette mi
347 pm edt wed mar 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...weak pressure gradient across lake superior this
afternoon as 30.1 high pressure over southern quebec is opposed by
29.5 inch high pressure over western montana. a 29.7 inch low
passing over far northern ontario overnight tonight will pass a
weak 29.9 inch trough over the lake. through the day thursday, the
gradient sharpens somewhat as 30.3 inch high pressure over the
canadian maritimes is opposed by 29.2 inch low pressure over the
high plains. by friday morning, a 29.0 inch colorado low will move
over the central plains, deepening to 28.9 inches over kansas by
friday night, opposing 30.2 inch high pressure over quebec.
through the day saturday, this low will weaken slightly as it
approaches lake superior in the evening at around 29.1 inches. the
low will roughly maintain strength as it reaches the shores of
hudson bay by sunday afternoon with 30.1 inch high pressure
filling in over the southern plains. this high will pass a 30.0
inch ridge over the lake by monday morning as a 29.6 inch low
approaches the western end of the lake by the evening hours of
monday.


lsz162-130400-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
347 pm edt wed mar 12 2025 /247 pm cdt wed mar 12 2025/

.late this afternoon...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...east winds 5 to 15 knots veering west after midnight.
waves calm to 2 feet. 
.thursday...west winds 5 to 15 knots backing east in the
afternoon, then increasing to 10 to 20 knots late. waves building
to 1 to 3 feet. 
.thursday night...east winds 10 to 20 knots. a slight chance of
rain showers after midnight. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.friday...east winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. a chance of rain showers. waves subsiding to
calm to 2 feet, then building to 2 to 4 feet. 
.friday night...northeast winds 15 to 25 knots. a chance of rain
showers through midnight. rain showers likely after midnight.
waves 2 to 4 feet. 
.saturday...east winds 10 to 20 knots backing north by mid
afternoon. rain showers. waves subsiding to 1 to 3 feet. 
.saturday night...northwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. a chance of rain and snow
showers. waves building to 3 to 6 feet occasionally to 8 feet. 
.sunday...northwest winds 20 to 30 knots becoming west 15 to
25 knots. waves subsiding to 1 to 3 feet. 
.monday...southwest winds 10 to 20 knots veering north. waves
subsiding to calm to 2 feet. 

$$