fzus61 kbuf 162201
glflo 
expires:202604170315;;487531

open lake forecast for lake ontario
national weather service buffalo ny
601 pm edt thu apr 16 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a 29.7 inch low over southern quebec will move to the 
saint lawrence valley this evening, then to the canadian maritimes 
by friday morning...with a 30.0 inch high then building across the 
lower great lakes friday, and new england friday night. a 29.4 inch 
low near lake superior friday evening will move to james bay and 
deepen to 29.0 inches saturday, while pushing a trailing strong cold 
front across the lake later saturday and saturday evening. a 30.4 
inch high will then settle southeastward across the great lakes 
sunday through monday night, before sliding off the mid-atlantic 
coast tuesday.


loz063>065-170315-
lake ontario open waters from hamlin beach to the saint lawrence
river-
601 pm edt thu apr 16 2026

.tonight...southwest winds 5 to 15 knots becoming northwest.
showers with a chance of thunderstorms early, then a chance of
showers from late evening on. areas of fog from late evening on.
some thunderstorms may produce gusty winds early. waves 1 to
3 feet. 
.friday...north winds 10 knots or less becoming west. patchy fog
early. a chance of showers early. waves 2 feet or less. 
.friday night...west winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.saturday...southeast winds 10 to 15 knots becoming south 15 to
20 knots. showers likely in the afternoon. waves 1 to 3 feet
building to 2 to 4 feet. 
.saturday night...south winds 15 to 20 knots becoming west. rain
showers. waves 2 to 4 feet building to 3 to 6 feet. 
.sunday...west winds 15 to 25 knots becoming northwest. rain
showers likely with a chance of snow showers during the day, then
a chance of rain and snow showers sunday night. waves 3 to 6 feet
building to 5 to 9 feet. waves occasionally around 11 feet. 
.monday...northwest winds 15 to 25 knots becoming west. waves
5 to 8 feet subsiding to 3 to 6 feet. waves occasionally around
10 feet. 
.tuesday...south winds 15 to 20 knots becoming west. a chance of
rain showers tuesday night. waves 2 to 4 feet building to 3 to
5 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 162201
glflo 
expires:202604170315;;487530

open lake forecast for lake ontario
national weather service buffalo ny
601 pm edt thu apr 16 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a 29.7 inch low over southern quebec will move to the 
saint lawrence valley this evening, then to the canadian maritimes 
by friday morning...with a 30.0 inch high then building across the 
lower great lakes friday, and new england friday night. a 29.4 inch 
low near lake superior friday evening will move to james bay and 
deepen to 29.0 inches saturday, while pushing a trailing strong cold 
front across the lake later saturday and saturday evening. a 30.4 
inch high will then settle southeastward across the great lakes 
sunday through monday night, before sliding off the mid-atlantic 
coast tuesday.


loz062-170315-
lake ontario open waters from the niagara river to hamlin beach-
601 pm edt thu apr 16 2026

.tonight...west winds 5 to 15 knots becoming northwest. showers
likely early, then a chance of showers. areas of fog from late
evening on. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...northwest winds 10 knots or less becoming south. patchy
fog early. waves 1 foot or less. 
.friday night...southeast winds 10 knots or less becoming east.
waves 1 foot or less. 
.saturday...southeast winds 5 to 15 knots becoming southwest
15 to 20 knots. a chance of showers in the morning, then showers
in the afternoon. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday night...southwest winds 15 to 20 knots becoming west.
rain showers. waves 2 to 4 feet building to 3 to 5 feet. 
.sunday...west winds 15 to 25 knots becoming northwest. a chance
of rain showers during the day. waves 3 to 6 feet. 
.monday...northwest winds 15 to 20 knots becoming southwest 10 to
15 knots. waves 3 to 6 feet subsiding to 1 to 2 feet. 
.tuesday...south winds 15 to 20 knots becoming west. waves 2 to
4 feet building to 3 to 5 feet. 

$$

fzus61 kcle 161945
glfle 
expires:202604170215;;482066

open lake forecast for lake erie
national weather service cleveland oh
345 pm edt thu apr 16 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a weak trough averaging 29.90 inches resides over lake erie for
the time being before a cold front moves southeastward across the
lake this evening through tonight. behind the front, a high
pressure ridge averaging 30.00 inches builds from the northern
great lakes through friday. during friday night through 
saturday morning, the ridge will exit eastward and allow a warm 
front to sweep northward across lake erie. a cold front should 
then sweep eastward across lake erie late saturday afternoon 
through saturday night. behind the cold front, a trough averaging 
29.90 inches should linger over the lake through sunday before a 
ridge averaging 30.30 inches builds from the west by monday. on 
tuesday, the ridge should exit eastward and allow a warm front to 
sweep northward across lake erie.


lez061-165>169-170215-
ripley to buffalo ny extending from 5nm 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-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
345 pm edt thu apr 16 2026

.tonight...southwest winds 10 knots or less becoming northwest. a
slight chance of showers and thunderstorms this evening, then a
slight chance of showers after midnight. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.friday...northwest winds less than 10 knots becoming northeast.
waves 1 foot or less. 
.friday night...east winds 5 to 15 knots becoming southeast. a
chance of showers overnight. waves 1 to 3 feet. 
.saturday...south winds 15 to 20 knots becoming southwest.
showers in the morning, then showers with a chance of
thunderstorms in the afternoon. waves 2 to 4 feet building to
3 to 5 feet. 
.saturday night...southwest winds 15 to 20 knots becoming west.
rain showers in the evening, then a chance of rain showers
overnight. waves 2 to 4 feet. 
.sunday...west winds 15 to 20 knots becoming northwest. a chance
of rain showers during the day. waves 3 to 5 feet. 
.monday...northwest winds 15 to 20 knots becoming south. waves
3 to 5 feet subsiding to 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming west. waves 2 to
4 feet building to 3 to 5 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 161945
glfle 
expires:202604170215;;482065

open lake forecast for lake erie
national weather service cleveland oh
345 pm edt thu apr 16 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a weak trough averaging 29.90 inches resides over lake erie for
the time being before a cold front moves southeastward across the
lake this evening through tonight. behind the front, a high
pressure ridge averaging 30.00 inches builds from the northern
great lakes through friday. during friday night through 
saturday morning, the ridge will exit eastward and allow a warm 
front to sweep northward across lake erie. a cold front should 
then sweep eastward across lake erie late saturday afternoon 
through saturday night. behind the cold front, a trough averaging 
29.90 inches should linger over the lake through sunday before a 
ridge averaging 30.30 inches builds from the west by monday. on 
tuesday, the ridge should exit eastward and allow a warm front to 
sweep northward across lake erie.


lez162>164-170215-
detroit river lt. to maumee bay oh to reno beach oh beyond 5nm
offshoreline to us-canadian border-
reno beach to the islands oh beyond 5nm off shoreline to us-
canadian border-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
345 pm edt thu apr 16 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 161944
glfsc 
expires:202604170345;;482039

lake st clair forecast
national weather service detroit/pontiac mi
344 pm edt thu apr 16 2026

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...weak area of low pressure, 29.60 inches, tracks into
the great lakes today maintaining periods of showers and
thunderstorms. a powerful cold front looks to cross the area on
saturday, with will present strong winds ahead and behind the
front.


lcz460-170345-
lake st clair-
344 pm edt thu apr 16 2026

.tonight...northwest winds 5 to 10 knots veering to the north in the
late evening and overnight. mostly cloudy this evening becoming
partly cloudy. a chance of thunderstorms early in the evening.
patchy fog early in the evening. areas of fog late in the
evening...then widespread fog after midnight. waves 2 feet or less.
.friday...light and variable winds becoming southeast 5 to 10 knots
late in the afternoon. partly sunny. widespread fog early in the
morning...then areas of fog late in the morning. waves 2 feet or
less.
.friday night...southeast winds 10 to 15 knots increasing to 15 to
20 knots after midnight. partly cloudy ...then mostly cloudy with
light showers likely and a chance of thunderstorms after midnight.
waves 2 feet or less.
.saturday...south winds 15 to 20 knots veering to the west early in
the afternoon. light showers and a chance of thunderstorms until
late afternoon...then light showers likely early in the afternoon.
waves 1 to 3 feet.
.saturday night...west winds 15 to 20 knots. partly cloudy. light
showers likely early in the evening...then a chance of light showers
by midnight. waves 1 to 3 feet.
.sunday...northwest winds 15 to 20 knots. mostly sunny in the
morning becoming partly cloudy. waves 1 to 3 feet.
.monday...south winds 10 to 15 knots. mostly clear. waves 2 feet or
less.
.tuesday...west winds 20 to 25 knots. partly cloudy. waves 2 to 4
feet.

$$

fzus63 kdtx 161944
glflh 
expires:202604170345;;482036

open lake forecast for lake huron
national weather service detroit/pontiac mi
344 pm edt thu apr 16 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...weak area of low pressure, 29.60 inches, tracks into
the great lakes today maintaining periods of showers and
thunderstorms. a powerful cold front looks to cross the area on
saturday, with will present strong winds ahead and behind the
front.


lhz361-362-170345-
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-
344 pm edt thu apr 16 2026

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


$$

fzus63 kdtx 161944
glflh 
expires:202604170345;;482037

open lake forecast for lake huron
national weather service detroit/pontiac mi
344 pm edt thu apr 16 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...weak area of low pressure, 29.60 inches, tracks into
the great lakes today maintaining periods of showers and
thunderstorms. a powerful cold front looks to cross the area on
saturday, with will present strong winds ahead and behind the
front.


lhz363-462>464-170345-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
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-
344 pm edt thu apr 16 2026

.tonight...north winds 5 to 10 knots  becoming light and
variable. areas of fog in the evening...then widespread fog after
midnight. waves 2 feet or less. 
.friday...light and variable winds becoming east 5 to 10 knots in
the afternoon. widespread fog in the morning. waves 2 feet or
less. 
.friday night...east winds 10 to 15 knots becoming southeast
20 to 25 knots with gusts to around 30 knots. a chance of showers
after midnight. waves 1 to 3 feet building to 4 to 6 feet in the
late evening and overnight. waves occasionally around 8 feet. 
.saturday...south winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots with gusts to around
30 knots in the late morning and early afternoon...then veering
to the southwest early in the afternoon. showers in the morning...
then a chance of showers in the afternoon. waves 6 to 9 feet.
waves occasionally around 12 feet. 
.saturday night...west winds 15 to 20 knots. a chance of showers
in the evening. waves 5 to 7 feet. waves occasionally around
10 feet. 
.sunday...northwest winds 15 to 20 knots increasing to 20 to
25 knots late in the evening. waves 6 to 9 feet building to 8 to
12 feet late in the afternoon. waves occasionally around 15 feet.
.monday...northwest winds 15 to 20 knots decreasing to 10 to
15 knots in the late morning and early afternoon...then becoming
northeast 5 to 10 knots early in the evening becoming south 15 to
20 knots by midnight. waves 6 to 9 feet subsiding to 2 to 4 feet
early in the evening...then building to 4 to 6 feet by midnight.
waves occasionally around 12 feet. 
.tuesday...south winds 20 to 25 knots with gusts to around
30 knots becoming southwest 15 to 20 knots early in the evening...
then becoming west 10 to 15 knots by midnight. waves 6 to 9 feet
subsiding to 3 to 5 feet by midnight. waves occasionally around
12 feet. 


$$

fzus63 kmkx 161950
glflm 
expires:202604170315;;482164

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
250 pm cdt thu apr 16 2026

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

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

.synopsis...

a weakening boundary is slowly moving toward the southern end of
lake michigan. this boundary is expected to clear the southern
end of lake michigan this evening, with winds becoming light and
variable tonight for a time as a weak surface ridge moves over
the lake. dense fog will continue over the lake through this
time. winds then come around to southerly tomorrow morning as a
surface low of 29.5 inches approaches from the central plains. 
this surface low will quickly move from omaha to duluth from the
morning into the afternoon. winds will become gusty and 
southeasterly friday night, and strong to severe storms will 
move east over the lake as a cold front sweeps through the area.
winds then become northwesterly behind the cold front saturday 
morning. breezy northwesterly winds then continue saturday 
through sunday as the low then races northeast toward hudson 
bay. 

winds ease monday morning as high pressure move southeast over
the upper great lakes.



lmz080-669-671-673-675-777-779-870-872-874-876-878-170315-
lake michigan from michigan city in to st. joseph mi 5 nm
offshore to mid lake-
lake michigan from sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from port washington to north point light wi 5 nm
offshore to mid lake-
lake michigan from north point light to wind point wi 5 nm
offshore to mid lake-
lake michigan from wind point wi to winthrop harbor il 5 nm
offshore to mid lake-
lake michigan from winthrop harbor to wilmette harbor il 5 nm
offshore to mid lake-
lake michigan from wilmette harbor il to michigan city in 5 nm
offshore to mid lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
lake michigan from grand haven to whitehall mi 5 nm offshore to
mid lake-
lake michigan from holland to grand haven mi 5 nm offshore to mid
lake-
lake michigan from south haven to holland mi 5 nm offshore to mid
lake-
lake michigan from st. joseph to south haven mi 5 nm offshore to
mid lake-
250 pm cdt thu apr 16 2026

sheboygan wi to pentwater mi south...

...dense fog advisory in effect until 7 am cdt friday...

.tonight...north winds 5 to 10 kt veering to southeast. areas of
dense fog. waves 1 to 2 ft. 
.friday...southeast winds 5 to 10 kt increasing to 15 to 25 kt.
areas of dense fog in the morning, then patchy dense fog in the
afternoon. waves 1 to 2 ft building to 3 to 5 ft. 
.friday night...south winds 15 to 25 kt becoming southwest. rain
showers with a chance of thunderstorms. waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 7 ft occasionally to
9 ft. 
.saturday...west winds 15 to 25 kt. chance of rain showers. waves
4 to 7 ft occasionally to 9 ft. 
.saturday night...west winds 10 to 20 kt increasing to 15 to
25 kt. waves 4 to 6 ft occasionally to 8 ft building to 4 to 7 ft
occasionally to 9 ft. 
.sunday...northwest winds 15 to 25 kt. waves 4 to 7 ft
occasionally to 9 ft. 
.sunday night...north winds 10 to 20 kt diminishing to 10 to
15 kt. waves 3 to 5 ft subsiding to 1 to 3 ft. 
.monday...southeast winds 10 to 15 kt increasing to 10 to 20 kt.
waves 2 to 4 ft. 
.tuesday...southwest winds to 30 kt diminishing to 15 to 25 kt.
waves 7 to 10 ft occasionally to 13 ft.  

$$

fzus63 kmkx 161950
glflm 
expires:202604170315;;482163

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
250 pm cdt thu apr 16 2026

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

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

.synopsis...

a weakening boundary is slowly moving toward the southern end of
lake michigan. this boundary is expected to clear the southern
end of lake michigan this evening, with winds becoming light and
variable tonight for a time as a weak surface ridge moves over
the lake. dense fog will continue over the lake through this
time. winds then come around to southerly tomorrow morning as a
surface low of 29.5 inches approaches from the central plains. 
this surface low will quickly move from omaha to duluth from the
morning into the afternoon. winds will become gusty and 
southeasterly friday night, and strong to severe storms will 
move east over the lake as a cold front sweeps through the area.
winds then become northwesterly behind the cold front saturday 
morning. breezy northwesterly winds then continue saturday 
through sunday as the low then races northeast toward hudson 
bay. 

winds ease monday morning as high pressure move southeast over
the upper great lakes.



lmz261-362-364-366-563-565-567-868-170315-
lake michigan from seul choix point to rock island passage 5 nm
offshore to mid lake-
lake michigan south of a line from seul choix point to the
mackinac bridge and north of a line from charlevoix mi to south
fox island 5 nm offshore-
lake michigan from charlevoix to point betsie mi 5 nm offshore to
mid lake-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
lake michigan from rock island passage to sturgeon bay wi-
lake michigan from sturgeon bay to two rivers wi 5 nm offshore to
mid lake-
lake michigan from two rivers to sheboygan wi 5 nm offshore to
mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
250 pm cdt thu apr 16 2026

sheboygan wi to pentwater mi north...

...dense fog advisory in effect until 7 am cdt friday...

.tonight...northeast winds 5 to 10 kt veering to southeast.
patchy dense fog this evening, then areas of dense fog overnight.
waves 1 to 2 ft. 
.friday...southeast winds 10 to 15 kt increasing to 15 to 25 kt.
areas of dense fog in the morning, then patchy dense fog in the
afternoon. waves 1 to 3 ft building to 3 to 5 ft. 
.friday night...southeast winds 15 to 25 kt becoming southwest.
rain showers with a chance of thunderstorms. waves 5 to 8 ft
occasionally to 10 ft. 
.saturday...west winds 15 to 25 kt. chance of rain showers. waves
4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft
occasionally to 8 ft. 
.saturday night...west winds 15 to 25 kt becoming northwest to
30 kt. waves 4 to 6 ft occasionally to 8 ft. 
.sunday...northwest winds to 30 kt. waves 4 to 6 ft occasionally
to 8 ft subsiding to 3 to 5 ft. 
.sunday night...north winds 15 to 25 kt diminishing to 10 to
20 kt. waves 2 to 4 ft. 
.monday...southwest winds 10 to 15 kt becoming south 10 to 20 kt.
waves 2 to 4 ft. 
.tuesday...southwest gales to 35 kt diminishing to 15 to 25 kt.
waves 7 to 10 ft occasionally to 13 ft.  

$$

fzus63 kmqt 162001
glfls 
expires:202604170800;;482400

open lake forecast for lake superior
national weather service marquette mi
400 pm edt thu apr 16 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

weak ridging of around 29.8 inches persists over lake superior 
through tonight. troughing averaging 29.5 inches moves across the 
lake friday evening and saturday morning. ridging builds over lake 
superior the remainder of saturday and throughout sunday, reaching 
about 30.3 inches monday morning. this gives way quickly to 
troughing monday evening as a low swings southeast through ontario 
toward james bay, decreasing to around 29.6 by monday evening.



lsz264-170800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 pm edt thu apr 16 2026

.late this afternoon...southeast winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. patchy fog through midnight, then areas
of dense fog after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.friday...southeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. areas of dense fog through early
afternoon. a slight chance of showers and thunderstorms by mid
afternoon. waves building to 6 to 9 feet occasionally to 11 feet.
.friday night...south winds 20 to 30 knots becoming west 15 to
25 knots after midnight, then increasing to 20 to 30 knots late.
rain showers and a chance of thunderstorms through midnight, then
a chance of rain showers, possibly mixed with freezing rain, snow
showers and sleet after midnight. waves building to 8 to 11 feet
occasionally to 14 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 
.saturday...west gales to 35 knots. a slight chance of snow
showers through early afternoon. waves building to 8 to 11 feet
occasionally to 14 feet. 
.saturday night...northwest gales to 35 knots. waves subsiding to
5 to 8 feet occasionally to 10 feet. 
.sunday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. waves subsiding to 2 to 4 feet. 
.sunday night...northwest winds 5 to 15 knots veering north after
midnight. waves subsiding to calm to 2 feet. 
.monday...south winds 15 to 25 knots increasing to 20 to
30 knots. waves building to 5 to 8 feet occasionally to 10 feet. 
.tuesday...west winds 20 to 30 knots becoming north 5 to
15 knots. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 

$$

fzus63 kmqt 162001
glfls 
expires:202604170800;;482401

open lake forecast for lake superior
national weather service marquette mi
400 pm edt thu apr 16 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

weak ridging of around 29.8 inches persists over lake superior 
through tonight. troughing averaging 29.5 inches moves across the 
lake friday evening and saturday morning. ridging builds over lake 
superior the remainder of saturday and throughout sunday, reaching 
about 30.3 inches monday morning. this gives way quickly to 
troughing monday evening as a low swings southeast through ontario 
toward james bay, decreasing to around 29.6 by monday evening.



lsz265-170800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 pm edt thu apr 16 2026

.late this afternoon...east winds 10 to 20 knots. patchy dense
fog. waves calm to 2 feet. 
.tonight...southeast winds 10 to 20 knots increasing to 15 to
25 knots late. areas of dense fog. waves building to 2 to 4 feet.
.friday...southeast winds 20 to 30 knots becoming south to
30 knots with a few gale force gusts to 35 knots possible late. a
slight chance of rain showers by mid afternoon. waves building to
6 to 9 feet occasionally to 11 feet. 
.friday night...south winds to 30 knots with a few gale force
gusts to 35 knots possible becoming west 20 to 30 knots after
midnight, then increasing to 30 knots with a few gale force gusts
to 35 knots possible late. rain showers and a chance of
thunderstorms through midnight, then a chance of rain showers,
possibly mixed with snow and sleet after midnight. waves building
to 7 to 10 feet occasionally to 13 feet, then subsiding to 3 to
6 feet occasionally to 8 feet. 
.saturday...west gales to 40 knots. a slight chance of rain
showers through early afternoon. a slight chance of snow showers
and sleet. waves building to 7 to 10 feet occasionally to
13 feet. 
.saturday night...northwest gales to 40 knots. waves subsiding to
6 to 9 feet occasionally to 11 feet. 
.sunday...northwest gales to 35 knots diminishing to 20 to
30 knots by mid afternoon. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.sunday night...northwest winds 10 to 20 knots. waves subsiding
to calm to 2 feet. 
.monday...southeast winds 10 to 20 knots becoming south gales to
35 knots. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 
.tuesday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet, then building to
2 to 4 feet. 

$$

fzus63 kmqt 162001
glfls 
expires:202604170800;;482398

open lake forecast for lake superior
national weather service marquette mi
400 pm edt thu apr 16 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

weak ridging of around 29.8 inches persists over lake superior 
through tonight. troughing averaging 29.5 inches moves across the 
lake friday evening and saturday morning. ridging builds over lake 
superior the remainder of saturday and throughout sunday, reaching 
about 30.3 inches monday morning. this gives way quickly to 
troughing monday evening as a low swings southeast through ontario 
toward james bay, decreasing to around 29.6 by monday evening.



lsz162-170800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt thu apr 16 2026 /300 pm cdt thu apr 16 2026/

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...northeast winds 10 to 20 knots. patchy fog. waves
building to 2 to 4 feet. 
.friday...east winds 10 to 20 knots backing northeast in the
afternoon, then backing northwest late. patchy fog through early
afternoon. rain showers likely and a chance of thunderstorms by
mid afternoon. waves subsiding to 1 to 3 feet. 
.friday night...west winds 15 to 25 knots increasing to 20 to
30 knots late. rain showers likely and a slight chance of
thunderstorms through midnight, then a slight chance of rain
showers after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.saturday...west gales to 35 knots diminishing to 20 to 30 knots
by mid afternoon. a slight chance of snow 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...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. waves subsiding to 2 to 4 feet. 
.sunday...northwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.sunday night...northwest winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.monday...south winds 10 to 20 knots becoming southwest 15 to
25 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 
.tuesday...west winds 10 to 20 knots becoming north 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 162001
glfls 
expires:202604170800;;482403

open lake forecast for lake superior
national weather service marquette mi
400 pm edt thu apr 16 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

weak ridging of around 29.8 inches persists over lake superior 
through tonight. troughing averaging 29.5 inches moves across the 
lake friday evening and saturday morning. ridging builds over lake 
superior the remainder of saturday and throughout sunday, reaching 
about 30.3 inches monday morning. this gives way quickly to 
troughing monday evening as a low swings southeast through ontario 
toward james bay, decreasing to around 29.6 by monday evening.



lsz267-170800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 pm edt thu apr 16 2026

.late this afternoon...northwest winds 5 to 15 knots. areas of
dense fog. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots veering southeast after
midnight. areas of dense fog through midnight, then widespread
dense fog after midnight. waves calm to 2 feet. 
.friday...southeast winds 10 to 20 knots increasing to 20 to
30 knots. areas of dense fog through early afternoon. waves
building to 4 to 7 feet occasionally to 9 feet. 
.friday night...southeast winds to 30 knots with a few gale force
gusts to 35 knots possible veering south after midnight, then
veering west late. rain showers and a slight chance of
thunderstorms. waves building to 4 to 8 feet occasionally to
10 feet. 
.saturday...west gales to 40 knots. a chance of rain showers,
possibly mixed with snow. a slight chance of sleet by mid
afternoon. waves building to 10 to 14 feet occasionally to
18 feet. 
.saturday night...west gales to 40 knots veering northwest after
midnight. waves subsiding to 10 to 14 feet occasionally to
18 feet. 
.sunday...northwest gales to 40 knots. waves subsiding to 7 to
10 feet occasionally to 13 feet. 
.sunday night...northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. waves subsiding to 2 to 4 feet. 
.monday...south winds 10 to 20 knots increasing to gales to
35 knots. waves subsiding to calm to 2 feet, then building to
6 to 9 feet occasionally to 11 feet. 
.tuesday...west winds 20 to 30 knots becoming northwest 10 to
20 knots. waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 162001
glfls 
expires:202604170800;;482402

open lake forecast for lake superior
national weather service marquette mi
400 pm edt thu apr 16 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

weak ridging of around 29.8 inches persists over lake superior 
through tonight. troughing averaging 29.5 inches moves across the 
lake friday evening and saturday morning. ridging builds over lake 
superior the remainder of saturday and throughout sunday, reaching 
about 30.3 inches monday morning. this gives way quickly to 
troughing monday evening as a low swings southeast through ontario 
toward james bay, decreasing to around 29.6 by monday evening.



lsz266-170800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
400 pm edt thu apr 16 2026

.late this afternoon...east winds 5 to 15 knots. patchy dense
fog. waves calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. areas of dense fog. waves building to
3 to 5 feet occasionally to 7 feet. 
.friday...southeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon, then becoming south to 30 knots with a
few gale force gusts to 35 knots possible late. areas of dense
fog through early afternoon. waves building to 7 to 10 feet
occasionally to 13 feet. 
.friday night...south winds to 30 knots with a few gale force
gusts to 35 knots possible veering west late. a slight chance of
thunderstorms through midnight. rain showers. a slight chance of
sleet after midnight. waves building to 8 to 11 feet occasionally
to 14 feet, then subsiding to 5 to 8 feet occasionally to
10 feet. 
.saturday...west gales to 40 knots. a slight chance of rain
showers through early afternoon. a slight chance of freezing
rain, snow showers and sleet. waves building to 10 to 14 feet
occasionally to 18 feet. 
.saturday night...northwest gales to 40 knots. waves 10 to
14 feet occasionally to 18 feet. 
.sunday...northwest gales to 35 knots. waves subsiding to 6 to
9 feet occasionally to 11 feet. 
.sunday night...northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. waves subsiding to 2 to 4 feet. 
.monday...south winds 15 to 25 knots increasing to gales to
40 knots. waves subsiding to calm to 2 feet, then building to
7 to 10 feet occasionally to 13 feet. 
.tuesday...west winds 20 to 30 knots becoming northwest 10 to
20 knots. waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 162001
glfls 
expires:202604170800;;482399

open lake forecast for lake superior
national weather service marquette mi
400 pm edt thu apr 16 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

weak ridging of around 29.8 inches persists over lake superior 
through tonight. troughing averaging 29.5 inches moves across the 
lake friday evening and saturday morning. ridging builds over lake 
superior the remainder of saturday and throughout sunday, reaching 
about 30.3 inches monday morning. this gives way quickly to 
troughing monday evening as a low swings southeast through ontario 
toward james bay, decreasing to around 29.6 by monday evening.



lsz263-170800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
400 pm edt thu apr 16 2026

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...east winds 5 to 15 knots veering southeast late.
patchy fog. waves building to 2 to 4 feet. 
.friday...east winds 10 to 20 knots veering south late. patchy
fog through early afternoon. a chance of showers and
thunderstorms by mid afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.friday night...west winds 20 to 30 knots. rain showers and a
chance of thunderstorms through midnight, then a slight chance of
rain showers, snow showers and sleet after midnight. waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
4 to 7 feet occasionally to 9 feet. 
.saturday...west winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. a slight chance of snow showers. waves
building to 8 to 11 feet occasionally to 14 feet. 
.saturday night...northwest gales to 35 knots. waves subsiding to
4 to 7 feet occasionally to 9 feet. 
.sunday...northwest winds 20 to 30 knots becoming west 15 to
25 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.sunday night...northwest winds 10 to 20 knots becoming south
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...south winds 10 to 20 knots becoming southwest 20 to
30 knots. waves building to 4 to 7 feet occasionally to 9 feet. 
.tuesday...west winds 15 to 25 knots becoming north 5 to
15 knots. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 

$$