fzus61 kbuf 270802
glflo 
expires:202604271500;;599809

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon apr 27 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 30.3 inch high will build across the lower great lakes 
through monday. a 29.4 inch low over the great plains monday night 
will advance northeast into the upper great lakes later monday night 
into tuesday morning, while pushing a warm front across the lake. 
the low will head northeast to james bay tuesday night sending a 
cold front across the lake. an inverted trough averaging 29.7 inch 
inverted trough is expected across the lower great lakes wednesday 
through wednesday night. the trough/low will track to the coast of 
new england through friday while also deepening to 29.5 inches.


loz062-271500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt mon apr 27 2026

.today...east winds 10 knots or less increasing to 10 to
15 knots. waves 1 to 3 feet. 
.tonight...east winds 15 to 20 knots becoming southeast 10 to
15 knots. waves 2 to 4 feet. 
.tuesday...southeast winds 15 to 20 knots becoming south.
showers. waves 2 to 4 feet. 
.tuesday night...southwest winds 15 to 20 knots becoming
northwest and diminishing to less than 10 knots overnight. a
chance of showers in the evening. waves 1 to 3 feet. 
.wednesday...north winds 5 to 15 knots becoming northwest 15 to
20 knots. showers. waves 1 foot or less building to 2 to 4 feet. 
.thursday...northwest winds 15 to 20 knots. a chance of rain
showers during the day. waves 2 to 4 feet building to 3 to
5 feet. 
.friday...northwest winds 15 to 20 knots. waves 3 to 6 feet. 

$$

fzus61 kbuf 270802
glflo 
expires:202604271500;;599810

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon apr 27 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 30.3 inch high will build across the lower great lakes 
through monday. a 29.4 inch low over the great plains monday night 
will advance northeast into the upper great lakes later monday night 
into tuesday morning, while pushing a warm front across the lake. 
the low will head northeast to james bay tuesday night sending a 
cold front across the lake. an inverted trough averaging 29.7 inch 
inverted trough is expected across the lower great lakes wednesday 
through wednesday night. the trough/low will track to the coast of 
new england through friday while also deepening to 29.5 inches.


loz063>065-271500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt mon apr 27 2026

.today...southeast winds 10 knots or less becoming northeast.
waves 1 foot or less. 
.tonight...east winds 10 to 15 knots becoming southeast 15 to
20 knots. waves 1 to 3 feet. 
.tuesday...southeast winds 15 to 20 knots becoming south.
showers. waves 2 to 4 feet building to 3 to 5 feet. 
.tuesday night...south winds 15 to 20 knots becoming west 10 to
15 knots. showers likely in the evening, then a chance of showers
overnight. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.wednesday...northwest winds 5 to 15 knots increasing to 15 to
20 knots. showers. waves 2 feet or less building to 2 to 4 feet. 
.thursday...northwest winds 15 to 25 knots. rain showers likely
during the day, then a chance of rain showers thursday night.
waves 3 to 5 feet building to 4 to 7 feet. waves occasionally
around 9 feet. 
.friday...northwest winds to 30 knots diminishing to 15 to
25 knots. a chance of rain showers. waves 6 to 9 feet subsiding
to 4 to 7 feet. waves occasionally around 11 feet. 

$$

fzus61 kcle 270742
glfle 
expires:202604271415;;599299

open lake forecast for lake erie
national weather service cleveland oh
342 am edt mon apr 27 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 ridge averaging 30.10 inches departs tonight ahead of an
advancing cold front that will track west to east across lake erie
beginning early tuesday. a secondary trough averaging 29.70 inches
moves in from the southwest wednesday. high pressure 30.00 inches
builds in late thursday.



lez165>167-271415-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-
342 am edt mon apr 27 2026

.today...southeast winds 5 to 15 knots becoming east. waves 1 to
2 feet. 
.tonight...southeast winds 10 to 15 knots becoming south and
increasing to 15 to 25 knots. showers likely with a slight chance
of thunderstorms after midnight. waves 1 to 3 feet building to
4 to 7 feet. waves occasionally around 9 feet. 
.tuesday...south winds 15 to 25 knots becoming southwest and
diminishing to 10 to 15 knots. a chance of showers. waves 3 to
6 feet subsiding to 2 to 4 feet. 
.tuesday night...west winds 5 to 15 knots becoming north. waves
1 to 3 feet. 
.wednesday...northeast winds 5 to 15 knots becoming northwest.
showers during the day. waves 1 to 3 feet. 
.thursday...northwest winds 10 to 15 knots becoming north. waves
1 to 3 feet. 
.friday...north winds 10 to 15 knots. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 270742
glfle 
expires:202604271415;;599300

open lake forecast for lake erie
national weather service cleveland oh
342 am edt mon apr 27 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 ridge averaging 30.10 inches departs tonight ahead of an
advancing cold front that will track west to east across lake erie
beginning early tuesday. a secondary trough averaging 29.70 inches
moves in from the southwest wednesday. high pressure 30.00 inches
builds in late thursday.



lez061-168-169-271415-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
342 am edt mon apr 27 2026

.today...east winds 5 to 15 knots. waves 1 foot or less. 
.tonight...east winds 10 to 15 knots becoming south and
increasing to 15 to 25 knots. a chance of showers after midnight.
a chance of showers with a slight chance of thunderstorms late.
waves 1 to 3 feet building to 4 to 7 feet. waves occasionally
around 9 feet. 
.tuesday...south winds 15 to 25 knots becoming southwest and
diminishing to 10 to 15 knots. a chance of showers. waves 3 to
6 feet subsiding to 2 to 4 feet. 
.tuesday night...southwest winds 5 to 15 knots becoming north
less than 10 knots. waves 1 to 3 feet. 
.wednesday...northeast winds 5 to 15 knots becoming northwest.
showers during the day, then a chance of showers wednesday night.
waves 1 to 3 feet. 
.thursday...northwest winds 10 to 15 knots. waves 1 to 3 feet. 
.friday...northwest winds 10 to 15 knots. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 270742
glfle 
expires:202604271415;;599298

open lake forecast for lake erie
national weather service cleveland oh
342 am edt mon apr 27 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 ridge averaging 30.10 inches departs tonight ahead of an
advancing cold front that will track west to east across lake erie
beginning early tuesday. a secondary trough averaging 29.70 inches
moves in from the southwest wednesday. high pressure 30.00 inches
builds in late thursday.



lez162>164-271415-
detroit river lt. to maumee bay oh to reno beach oh beyond 5nm
offshoreline to us-canadian border-
reno beach to the islands oh beyond 5nm off shoreline to us-
canadian border-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
342 am edt mon apr 27 2026

.today...southeast winds 10 to 15 knots becoming east 15 to
20 knots. waves 1 to 3 feet. 
.tonight...southeast winds 15 to 20 knots becoming south. a
chance of showers early, then a chance of showers and
thunderstorms late in the evening. showers with a chance of
thunderstorms after midnight. waves 1 to 3 feet building to 3 to
6 feet. 
.tuesday...south winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. a chance of showers in the
morning. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.tuesday night...west winds 5 to 10 knots becoming north. a
chance of showers overnight. waves 2 feet or less. 
.wednesday...northeast winds 5 to 15 knots becoming north.
showers likely during the day. waves 1 to 3 feet. 
.thursday...northwest winds 10 to 15 knots becoming north. waves
1 to 3 feet. 
.friday...north winds 10 to 15 knots. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 270733
glfsc 
expires:202604271545;;598901

lake st clair forecast
national weather service detroit/pontiac mi
333 am edt mon apr 27 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...broad high pressure, 30.20 inches, holds over the
great lakes through early monday. the next low, 29.30 inches,
lifts into the northern great lakes late monday-tuesday bringing
stronger southerly winds and the next chance for thunderstorms.


lcz460-271545-
lake st clair-
333 am edt mon apr 27 2026

...small craft advisory in effect from this evening through
tuesday afternoon...

.today...southeast winds 10 to 15 knots increasing to 15 to 20 knots
in the afternoon. partly sunny. waves 2 feet or less.
.tonight...southeast winds 15 to 20 knots becoming south 20 to 25
knots with gusts to 30 knots after midnight. a chance of light
showers late in the evening. light showers and a chance of
thunderstorms after midnight. waves 1 to 3 feet building to 2 to 4
feet after midnight.
.tuesday...south winds 20 to 25 knots with gusts to 30 knots
becoming southwest 15 to 20 knots in the late morning and early
afternoon...then becoming west 10 to 15 knots early in the
afternoon. partly sunny. a chance of light showers until late
afternoon. waves 2 to 4 feet subsiding to 1 to 3 feet in the late
morning and afternoon.
.tuesday night...west winds 10 to 15 knots becoming north 5 to 10
knots in the late evening and overnight. partly cloudy becoming
mostly cloudy. waves 2 feet or less.
.wednesday...north winds 10 to 15 knots increasing to 15 to 20 knots
in the evening. mostly cloudy with a chance of light showers...then
partly cloudy in the evening. waves 2 feet or less.
.thursday...north winds 10 to 15 knots. mostly clear. waves 2 feet
or less.
.friday...north winds 10 to 15 knots. partly cloudy. waves 2 feet or
less.

$$

fzus63 kdtx 270733
glflh 
expires:202604271545;;598897

open lake forecast for lake huron
national weather service detroit/pontiac mi
333 am edt mon apr 27 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...broad high pressure, 30.20 inches, holds over the
great lakes through early monday. the next low, 29.30 inches,
lifts into the northern great lakes late monday-tuesday bringing
stronger southerly winds and the next chance for thunderstorms.


lhz361-271545-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
333 am edt mon apr 27 2026

.today...east winds 10 to 15 knots increasing to 20 to 25 knots
with gusts to around 30 knots. waves 1 to 3 feet building to 5 to
7 feet. waves occasionally around 10 feet. 
.tonight...southeast winds 20 to 25 knots with gusts to 35 knot
gales. a chance of showers in the evening...then showers and a
chance of thunderstorms after midnight. waves 8 to 12 feet. waves
occasionally around 15 feet. 
.tuesday...south winds 15 to 20 knots with gusts to around
30 knots veering to the west early in the afternoon. a chance of
showers in the morning. waves 8 to 12 feet. waves occasionally
around 15 feet. 
.tuesday night...west winds 15 to 20 knots decreasing to 5 to
10 knots. waves 4 to 6 feet subsiding to 2 to 4 feet after
midnight. waves occasionally around 8 feet. 
.wednesday...northwest winds 5 to 10 knots increasing to 10 to
15 knots late in the afternoon. waves 1 to 3 feet building to
2 to 4 feet late in the afternoon. 
.thursday...northwest winds 10 to 15 knots increasing to 15 to
20 knots by midnight. waves 2 to 4 feet subsiding to 1 to 3 feet
in the late morning and early afternoon...then building to 2 to
4 feet . 
.friday...north winds 10 to 15 knots becoming northwest 15 to
20 knots . waves 2 to 4 feet subsiding to 1 to 3 feet in the late
morning and early afternoon...then building to 3 to 5 feet . 


$$

fzus63 kdtx 270733
glflh 
expires:202604271545;;598898

open lake forecast for lake huron
national weather service detroit/pontiac mi
333 am edt mon apr 27 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...broad high pressure, 30.20 inches, holds over the
great lakes through early monday. the next low, 29.30 inches,
lifts into the northern great lakes late monday-tuesday bringing
stronger southerly winds and the next chance for thunderstorms.


lhz362-363-271545-
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-
333 am edt mon apr 27 2026

.today...southeast winds 10 to 15 knots increasing to 15 to
20 knots in the afternoon. waves 1 to 3 feet building to 3 to
5 feet in the afternoon. 
.tonight...southeast winds 15 to 20 knots increasing to 30 knots
with gusts to 35 knot gales. showers likely after midnight. waves
5 to 7 feet building to 8 to 12 feet after midnight. waves
occasionally around 15 feet. 
.tuesday...south winds 20 to 25 knots with gusts to 35 knot gales
decreasing to 15 to 20 knots with gusts to around 30 knots in the
late morning and afternoon. showers likely in the morning. waves
8 to 12 feet. waves occasionally around 15 feet. 
.tuesday night...west winds 10 to 15 knots becoming northwest
5 to 10 knots in the late evening and overnight. waves 3 to
5 feet. 
.wednesday...northwest winds 5 to 10 knots becoming north 10 to
15 knots late in the morning...then backing to the northwest late
in the afternoon increasing to 15 to 20 knots late in the
evening. waves 1 to 3 feet building to 3 to 5 feet late in the
afternoon. 
.thursday...northwest winds 10 to 15 knots increasing to 15 to
20 knots by midnight. waves 3 to 5 feet. 
.friday...northwest winds 10 to 15 knots increasing to 15 to
20 knots . waves 3 to 5 feet. 


$$

fzus63 kdtx 270733
glflh 
expires:202604271545;;598899

open lake forecast for lake huron
national weather service detroit/pontiac mi
333 am edt mon apr 27 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...broad high pressure, 30.20 inches, holds over the
great lakes through early monday. the next low, 29.30 inches,
lifts into the northern great lakes late monday-tuesday bringing
stronger southerly winds and the next chance for thunderstorms.


lhz462>464-271545-
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-
333 am edt mon apr 27 2026

.today...southeast winds 10 to 15 knots. waves 1 to 3 feet
building to 2 to 4 feet in the afternoon. 
.tonight...southeast winds 15 to 20 knots increasing to 20 to
25 knots with gusts to around 30 knots in the late evening and
overnight. showers and a chance of thunderstorms after midnight.
waves 4 to 6 feet building to 6 to 9 feet after 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 in the late morning
and afternoon. a chance of showers in the morning. waves 6 to
9 feet. waves occasionally around 12 feet. 
.tuesday night...west winds 10 to 15 knots becoming north 5 to
10 knots in the late evening and overnight. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late evening and overnight. 
.wednesday...north winds 5 to 10 knots increasing to 15 to
20 knots. a chance of showers in the morning. waves 1 to 3 feet
building to 3 to 5 feet. 
.thursday...northwest winds 10 to 15 knots. waves 3 to 5 feet
subsiding to 2 to 4 feet . 
.friday...northwest winds 10 to 15 knots. waves 2 to 4 feet. 


$$

fzus63 kmkx 270752
glflm 
expires:202604271530;;599553

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
252 am cdt mon apr 27 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...

low pressure of 29.5 inches over eastern kansas will lift into 
lake superior by late tonight while deepening to 29.3 inches.
southeasterly winds will increase throughout today to gust around
30 kt throughout the afternoon and early overnight hours. although
the cooler lake temps should dampen the threat for widespread gales
across the lake, thunderstorms during the afternoon and evening
may produce multiple periods of gale force gusts in the southern
half. trends will be monitored into the afternoon regarding the 
wind threat within the storms and regarding potential for gales 
outside of these storms. winds will shift to the west early 
tuesday morning with the cold frontal passage from this exiting 
low, and gusty westerly winds are then expected through tuesday 
afternoon.

high pressure around 30.1 inches will set up over the upper
midwest and upper great lakes tuesday through friday, producing
light and variable winds.


lmz080-669-671-673-675-777-779-870-872-874-876-878-271530-
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-
252 am cdt mon apr 27 2026

sheboygan wi to pentwater mi south...

.today...southeast winds 15 to 25 kt increasing to 30 kt. chance
of rain showers and slight chance of thunderstorms this
afternoon. waves 4 to 6 ft occasionally to 8 ft building to 7 to
10 ft occasionally to 13 ft. 
.tonight...south winds to 30 kt becoming southwest 15 to 25 kt.
rain showers with thunderstorms likely in the evening, then
chance of rain showers and slight chance of thunderstorms
overnight. waves 8 to 11 ft occasionally to 14 ft subsiding to
6 to 9 ft occasionally to 12 ft. 
.tuesday...west winds 15 to 25 kt diminishing to 10 to 15 kt.
waves 6 to 9 ft occasionally to 12 ft subsiding to 3 to 5 ft. 
.tuesday night...north winds 10 to 15 kt. waves 1 to 3 ft
subsiding to 1 to 2 ft. 
.wednesday...north winds 10 to 20 kt. waves 1 to 3 ft building to
2 to 4 ft. 
.wednesday night...north winds 10 to 20 kt diminishing to 5 to
10 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.thursday...north winds 5 to 10 kt becoming northeast 10 to
20 kt. waves 1 to 2 ft. 
.friday...north winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft building to 3 to 5 ft.  

$$

fzus63 kmkx 270752
glflm 
expires:202604271530;;599552

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
252 am cdt mon apr 27 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...

low pressure of 29.5 inches over eastern kansas will lift into 
lake superior by late tonight while deepening to 29.3 inches.
southeasterly winds will increase throughout today to gust around
30 kt throughout the afternoon and early overnight hours. although
the cooler lake temps should dampen the threat for widespread gales
across the lake, thunderstorms during the afternoon and evening
may produce multiple periods of gale force gusts in the southern
half. trends will be monitored into the afternoon regarding the 
wind threat within the storms and regarding potential for gales 
outside of these storms. winds will shift to the west early 
tuesday morning with the cold frontal passage from this exiting 
low, and gusty westerly winds are then expected through tuesday 
afternoon.

high pressure around 30.1 inches will set up over the upper
midwest and upper great lakes tuesday through friday, producing
light and variable winds.


lmz261-362-364-366-563-565-567-868-271530-
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-
252 am cdt mon apr 27 2026

sheboygan wi to pentwater mi north...

.today...southeast winds 15 to 25 kt increasing to 30 kt. chance
of rain showers and thunderstorms this afternoon. waves 4 to 6 ft
occasionally to 8 ft building to 7 to 10 ft occasionally to
13 ft. 
.tonight...southeast winds to 30 kt becoming southwest 15 to
25 kt. rain showers with thunderstorms likely in the evening,
then chance of rain showers and slight chance of thunderstorms
overnight. waves 8 to 11 ft occasionally to 14 ft subsiding to
7 to 10 ft occasionally to 13 ft. 
.tuesday...southwest winds 15 to 25 kt becoming west 10 to 20 kt.
waves 6 to 9 ft occasionally to 12 ft subsiding to 3 to 5 ft. 
.tuesday night...northwest winds 10 to 20 kt becoming north 10 to
15 kt. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.wednesday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.wednesday night...north winds 10 to 15 kt. waves 1 to 2 ft.
.thursday...north winds 10 to 15 kt becoming west 10 to 20 kt.
waves 1 to 2 ft. 
.friday...north winds 10 to 20 kt. waves 1 to 3 ft.  

$$

fzus63 kmqt 270801
glfls 
expires:202604272000;;599713

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon apr 27 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...

this morning, lake superior is between a 30.3 inch high over quebec 
and a 29.5 inch low over oklahoma. throughout today, this low moves 
northeast, reaching the upper peninsula late this evening and 
crosses the lake at 29.4 inches by early tuesday morning. the low 
reaches james bay tuesday afternoon while 30.1 inch high pressure 
builds over the canadian prairie. as the low further moves 
northeast, the high builds to 30.2 inches while a 29.8 inch low 
passes south of the lower great lakes wednesday. by thursday night, 
the 30.2 inch high will span from hudson bay to the central plains 
while low pressure of 29.5 inches will be off cape cod. the high 
then shifts directly over lake superior by saturday ahead of the 
arrival of a weak trough late saturday into sunday.



lsz162-272000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt mon apr 27 2026 /301 am cdt mon apr 27 2026/

...dense fog advisory in effect until 8 am edt /7 am cdt/ this
morning...

.early this morning...northeast winds 15 to 25 knots. patchy
dense fog. a slight chance of rain showers. waves 2 to 4 feet
building to 3 to 5 feet occasionally to 7 feet. 
.today...northeast winds 15 to 25 knots. rain showers. waves
building to 3 to 6 feet occasionally to 8 feet. 
.tonight...northeast winds 10 to 20 knots becoming northwest
15 to 25 knots after midnight, then becoming west 20 to 30 knots
late. rain showers through midnight, then a chance of rain
showers after midnight. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...west winds 20 to 30 knots diminishing to 10 to
20 knots late. waves subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 5 to 15 knots. waves subsiding
to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...northeast winds 5 to 15 knots backing north. waves
calm to 2 feet. 
.friday...southeast winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 270801
glfls 
expires:202604272000;;599714

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon apr 27 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...

this morning, lake superior is between a 30.3 inch high over quebec 
and a 29.5 inch low over oklahoma. throughout today, this low moves 
northeast, reaching the upper peninsula late this evening and 
crosses the lake at 29.4 inches by early tuesday morning. the low 
reaches james bay tuesday afternoon while 30.1 inch high pressure 
builds over the canadian prairie. as the low further moves 
northeast, the high builds to 30.2 inches while a 29.8 inch low 
passes south of the lower great lakes wednesday. by thursday night, 
the 30.2 inch high will span from hudson bay to the central plains 
while low pressure of 29.5 inches will be off cape cod. the high 
then shifts directly over lake superior by saturday ahead of the 
arrival of a weak trough late saturday into sunday.



lsz263-272000-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
401 am edt mon apr 27 2026

...dense fog advisory in effect until 8 am edt this morning...

.early this morning...east winds 10 to 20 knots. patchy dense
fog. a slight chance of rain showers. waves 2 to 4 feet. 
.today...east winds 15 to 25 knots. a chance of rain showers
through early afternoon, then rain showers and a slight chance of
thunderstorms by mid afternoon. waves building to 4 to 7 feet
occasionally to 9 feet. 
.tonight...east winds 15 to 25 knots backing north after
midnight, then becoming northwest 20 to 30 knots late. rain
showers likely through midnight, then a chance of rain showers
after midnight. waves building to 6 to 9 feet occasionally to
11 feet, then subsiding to 4 to 7 feet occasionally to 9 feet. 
.tuesday...west winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. a slight chance of rain showers
through early afternoon. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tuesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...north winds 5 to 15 knots backing northwest. waves
calm to 2 feet. 
.friday...north winds 5 to 15 knots backing west. waves calm to
2 feet. 

$$

fzus63 kmqt 270801
glfls 
expires:202604272000;;599715

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon apr 27 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...

this morning, lake superior is between a 30.3 inch high over quebec 
and a 29.5 inch low over oklahoma. throughout today, this low moves 
northeast, reaching the upper peninsula late this evening and 
crosses the lake at 29.4 inches by early tuesday morning. the low 
reaches james bay tuesday afternoon while 30.1 inch high pressure 
builds over the canadian prairie. as the low further moves 
northeast, the high builds to 30.2 inches while a 29.8 inch low 
passes south of the lower great lakes wednesday. by thursday night, 
the 30.2 inch high will span from hudson bay to the central plains 
while low pressure of 29.5 inches will be off cape cod. the high 
then shifts directly over lake superior by saturday ahead of the 
arrival of a weak trough late saturday into sunday.



lsz264-272000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt mon apr 27 2026

...dense fog advisory in effect until 8 am edt this morning...
...gale warning in effect from this afternoon through tuesday
afternoon...

.early this morning...east winds 10 to 20 knots. waves calm to
2 feet building to 1 to 3 feet. 
.today...east winds 15 to 25 knots becoming southeast 20 to
30 knots in the afternoon, then increasing to gales to 35 knots
late. a chance of rain showers through early afternoon, then rain
showers and a slight chance of thunderstorms by mid afternoon.
waves building to 6 to 9 feet occasionally to 11 feet. 
.tonight...southeast gales to 35 knots diminishing to 20 to
30 knots after midnight, then veering northwest late. rain
showers through midnight, then a chance of rain showers after
midnight. waves building to 8 to 11 feet occasionally to 14 feet,
then subsiding to 6 to 9 feet occasionally to 11 feet. 
.tuesday...west gales to 35 knots diminishing to 20 to 30 knots
late. a slight chance of rain showers through early afternoon.
waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.tuesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.wednesday night...northwest winds less than 10 knots becoming
north 5 to 15 knots after midnight. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots backing northwest. waves
calm to 2 feet. 
.friday...north winds 5 to 15 knots backing northwest. waves calm
to 2 feet. 

$$

fzus63 kmqt 270801
glfls 
expires:202604272000;;599716

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon apr 27 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...

this morning, lake superior is between a 30.3 inch high over quebec 
and a 29.5 inch low over oklahoma. throughout today, this low moves 
northeast, reaching the upper peninsula late this evening and 
crosses the lake at 29.4 inches by early tuesday morning. the low 
reaches james bay tuesday afternoon while 30.1 inch high pressure 
builds over the canadian prairie. as the low further moves 
northeast, the high builds to 30.2 inches while a 29.8 inch low 
passes south of the lower great lakes wednesday. by thursday night, 
the 30.2 inch high will span from hudson bay to the central plains 
while low pressure of 29.5 inches will be off cape cod. the high 
then shifts directly over lake superior by saturday ahead of the 
arrival of a weak trough late saturday into sunday.



lsz265-272000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt mon apr 27 2026

...gale warning in effect from this afternoon through tuesday
afternoon...

.early this morning...southeast winds 15 to 25 knots. waves calm
to 2 feet building to 1 to 3 feet. 
.today...southeast winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. a chance of rain showers. a slight
chance of thunderstorms by mid afternoon. waves building to 5 to
8 feet occasionally to 10 feet. 
.tonight...southeast gales to 35 knots diminishing to 20 to
30 knots after midnight, then veering west late. rain showers
likely and a slight chance of thunderstorms through midnight,
then a chance of rain showers after midnight. waves building to
7 to 10 feet occasionally to 13 feet, then subsiding to 3 to
6 feet occasionally to 8 feet. 
.tuesday...west gales to 40 knots diminishing to 20 to 30 knots
late. a slight chance of rain showers through early afternoon.
waves building to 5 to 8 feet occasionally to 10 feet, then
subsiding to 3 to 5 feet occasionally to 7 feet. 
.tuesday night...northwest winds 10 to 20 knots. waves subsiding
to calm to 2 feet. 
.wednesday...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.wednesday night...northwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves calm to 2 feet. 
.thursday...north winds 10 to 20 knots becoming northwest 5 to
15 knots. waves calm to 2 feet. 
.friday...north winds 10 to 20 knots backing northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 270801
glfls 
expires:202604272000;;599717

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon apr 27 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...

this morning, lake superior is between a 30.3 inch high over quebec 
and a 29.5 inch low over oklahoma. throughout today, this low moves 
northeast, reaching the upper peninsula late this evening and 
crosses the lake at 29.4 inches by early tuesday morning. the low 
reaches james bay tuesday afternoon while 30.1 inch high pressure 
builds over the canadian prairie. as the low further moves 
northeast, the high builds to 30.2 inches while a 29.8 inch low 
passes south of the lower great lakes wednesday. by thursday night, 
the 30.2 inch high will span from hudson bay to the central plains 
while low pressure of 29.5 inches will be off cape cod. the high 
then shifts directly over lake superior by saturday ahead of the 
arrival of a weak trough late saturday into sunday.



lsz266-272000-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
401 am edt mon apr 27 2026

...gale warning in effect from 3 pm edt this afternoon through
tuesday afternoon...

.early this morning...southeast winds 15 to 25 knots. waves 1 to
3 feet. 
.today...southeast winds 20 to 30 knots increasing to gales to
40 knots in the afternoon. a chance of rain showers by mid
afternoon. waves building to 8 to 11 feet occasionally to
14 feet. 
.tonight...southeast gales to 45 knots becoming south gales to
35 knots late. a slight chance of thunderstorms through midnight.
rain showers. waves building to 9 to 12 feet occasionally to
15 feet, then subsiding to 6 to 9 feet occasionally to 11 feet. 
.tuesday...west gales to 40 knots. a slight chance of rain
showers through early afternoon. waves subsiding to 5 to 8 feet
occasionally to 10 feet, then building to 10 to 14 feet
occasionally to 18 feet. 
.tuesday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet. 
.wednesday...northwest winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.wednesday night...northwest winds 10 to 20 knots veering north
after midnight. waves calm to 2 feet. 
.thursday...north winds 10 to 20 knots backing northwest. waves
building to 1 to 3 feet. 
.friday...north winds 15 to 25 knots backing northwest. waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 270801
glfls 
expires:202604272000;;599718

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon apr 27 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...

this morning, lake superior is between a 30.3 inch high over quebec 
and a 29.5 inch low over oklahoma. throughout today, this low moves 
northeast, reaching the upper peninsula late this evening and 
crosses the lake at 29.4 inches by early tuesday morning. the low 
reaches james bay tuesday afternoon while 30.1 inch high pressure 
builds over the canadian prairie. as the low further moves 
northeast, the high builds to 30.2 inches while a 29.8 inch low 
passes south of the lower great lakes wednesday. by thursday night, 
the 30.2 inch high will span from hudson bay to the central plains 
while low pressure of 29.5 inches will be off cape cod. the high 
then shifts directly over lake superior by saturday ahead of the 
arrival of a weak trough late saturday into sunday.



lsz267-272000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt mon apr 27 2026

...gale warning in effect from 3 pm edt this afternoon through
tuesday afternoon...

.early this morning...southeast winds 15 to 25 knots. waves 1 to
3 feet. 
.today...southeast winds 15 to 25 knots increasing to gales to
40 knots in the afternoon. a slight chance of rain showers by mid
afternoon. waves building to 8 to 11 feet occasionally to
14 feet. 
.tonight...southeast gales to 45 knots. a slight chance of
thunderstorms through midnight. rain showers. waves building to
9 to 12 feet occasionally to 15 feet, then subsiding to 5 to
8 feet occasionally to 10 feet. 
.tuesday...west gales to 40 knots. a chance of rain showers
through early afternoon. waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 9 to 12 feet
occasionally to 15 feet. 
.tuesday night...northwest winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. waves subsiding to 1 to 3 feet. 
.wednesday...northwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...northwest winds 10 to 20 knots veering north
after midnight. waves calm to 2 feet. 
.thursday...northwest winds 10 to 20 knots veering north. waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.friday...northwest winds 15 to 25 knots veering north. waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
1 to 3 feet. 

$$