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fzus63 kdtx 181943
glflh 
expires:202404190345;;972345

open lake forecast for lake huron
national weather service detroit/pontiac mi
343 pm edt thu apr 18 2024

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, 30.00 inches, briefly builds over the
central great lakes today. another weak cold front, 29.80 inches,
then sags south through the area late tonight into friday
bringing widespread showers and a couple thunderstorms. cooler,
moderate west-northwest flow sets up for the weekend.


lhz361-362-190345-
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-
343 pm edt thu apr 18 2024

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


$$
fzus63 kdtx 181943
glflh 
expires:202404190345;;972346

open lake forecast for lake huron
national weather service detroit/pontiac mi
343 pm edt thu apr 18 2024

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, 30.00 inches, briefly builds over the
central great lakes today. another weak cold front, 29.80 inches,
then sags south through the area late tonight into friday
bringing widespread showers and a couple thunderstorms. cooler,
moderate west-northwest flow sets up for the weekend.


lhz363-462-190345-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
343 pm edt thu apr 18 2024

.tonight...southeast winds 5 to 10 knots. showers after midnight.
waves 2 feet or less. 
.friday...north winds 5 to 10 knots becoming west 10 to 15 knots
in the late morning and afternoon. showers in the morning. waves
1 to 3 feet building to 3 to 5 feet late in the afternoon. 
.friday night...west winds 10 to 15 knots. waves 3 to 5 feet. 
.saturday...west winds 10 to 15 knots. waves 3 to 5 feet. 
.saturday night...west winds 10 to 15 knots decreasing to 5 to
10 knots in the late evening and early morning...then increasing
to 10 to 15 knots after midnight. waves 3 to 5 feet. 
.sunday...west winds 10 to 15 knots becoming southwest 15 to
20 knots late in the morning...then becoming west 10 to 15 knots
late in the afternoon. waves 2 to 4 feet subsiding to 1 to 3 feet
late in the evening. 
.monday...west winds 5 to 10 knots becoming south 10 to 15 knots.
waves 1 to 3 feet. 
.tuesday...south winds 10 to 15 knots backing to the southeast
early in the evening...then becoming north 15 to 20 knots in the
late evening and early morning. showers...then a chance of
showers in the late evening and early morning. waves 1 to 3 feet
building to 3 to 5 feet in the late evening and early morning. 


$$
fzus63 kmkx 182005
glflm 
expires:202404190330;;974008

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
305 pm cdt thu apr 18 2024

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...

lake michigan will be sandwiched between two areas of low
pressure. expect lighter winds to continue through the evening as
the southern low pressure around 29.8 inches centered over mo 
this afternoon lifts across central il/in. meanwhile the northern
low across ontario is progged to meander over into the hudson bay
region and deepen to around 29.5 inches through friday. expect a 
stronger pressure gradient develop over the region for friday with
high pressure building to around 30.4 inches across the plains 
resulting in 25-30 knot northwesterly winds for friday. high 
pressure is expected to gradually work its way south-southeast 
through the weekend with lighter winds over lake michigan. then 
southerly winds return by the start of next week ahead of a 
developing low over the plains. 



lmz261-362-364-366-563-565-567-868-190330-
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-
305 pm cdt thu apr 18 2024

sheboygan wi to pentwater mi north...

.tonight...southwest winds 10 to 20 kt becoming west 15 to 25 kt.
chance of rain showers this evening, then slight chance of rain
showers overnight. waves 2 to 4 ft. 
.friday...west winds 15 to 25 kt increasing to 30 kt. waves 4 to
6 ft occasionally to 8 ft. 
.friday night...west winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.saturday...west winds 15 to 25 kt. waves 4 to 6 ft occasionally
to 8 ft subsiding to 3 to 5 ft. 
.saturday night...west winds 10 to 20 kt. waves 2 to 4 ft. 
.sunday...west winds 15 to 25 kt becoming southwest to 30 kt.
waves 3 to 5 ft. 
.sunday night...west winds 15 to 25 kt backing to southeast 10 to
20 kt. waves 2 to 4 ft. 
.monday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 2 to 4 ft. 
.tuesday...east winds 15 to 25 kt becoming north to 30 kt. rain
showers likely. waves 4 to 6 ft occasionally to 8 ft.  

$$
fzus63 kmkx 182005
glflm 
expires:202404190330;;974007

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
305 pm cdt thu apr 18 2024

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...

lake michigan will be sandwiched between two areas of low
pressure. expect lighter winds to continue through the evening as
the southern low pressure around 29.8 inches centered over mo 
this afternoon lifts across central il/in. meanwhile the northern
low across ontario is progged to meander over into the hudson bay
region and deepen to around 29.5 inches through friday. expect a 
stronger pressure gradient develop over the region for friday with
high pressure building to around 30.4 inches across the plains 
resulting in 25-30 knot northwesterly winds for friday. high 
pressure is expected to gradually work its way south-southeast 
through the weekend with lighter winds over lake michigan. then 
southerly winds return by the start of next week ahead of a 
developing low over the plains. 



lmz080-669-671-673-675-777-779-870-872-874-876-878-190330-
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-
305 pm cdt thu apr 18 2024

sheboygan wi to pentwater mi south...

.tonight...northwest winds 10 to 20 kt increasing to 15 to 25 kt.
rain showers this evening, then chance of rain showers overnight.
waves 2 to 4 ft. 
.friday...northwest winds 15 to 25 kt becoming west to 30 kt.
waves 4 to 6 ft occasionally to 8 ft. 
.friday night...west winds 15 to 25 kt increasing to 30 kt. waves
3 to 5 ft building to 4 to 6 ft occasionally to 8 ft.
.saturday...west winds to 30 kt diminishing to 15 to 25 kt. waves
5 to 8 ft occasionally to 10 ft. 
.saturday night...west winds 10 to 15 kt increasing to 10 to
20 kt. waves 3 to 5 ft. 
.sunday...west winds 10 to 20 kt becoming southwest. waves 2 to
4 ft. 
.sunday night...southwest winds 10 to 20 kt becoming west. 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 winds 15 to 25 kt veering to northwest to
30 kt. rain showers likely. waves 3 to 5 ft.  

$$
fzus63 kmqt 182008
glfls 
expires:202404190415;;974298

open lake forecast for lake superior
national weather service marquette mi
408 pm edt thu apr 18 2024

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

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

.synopsis... a broad area of low pressure is centered over northwestern
ontario at 29.8 inches this afternoon. this area of low pressure 
slowly moves over far northern ontario tonight and into james bay
saturday morning, deepening to 29.3 inches. meanwhile, a 30.4 
inch high pressure ridge builds southeast into the northern plains
extending weak 30.0 inch ridging across western lake superior. 
the ridge builds to 30.1 inches on saturday, creating a tight 
southwest to northeast pressure gradient over the lake saturday 
morning. the gradient begins to slack on sunday as 30.3 inch high 
pressure slides into the southern plains, and a weak 29.9 inch 
trough extending from quebec dips over the east half of lake 
superior. a brief period of 30.1 inch high pressure meanders south
out of the canadian prairie sunday night into monday before broad
29.7 inch low pressure begins moving eastward into the great 
lakes on tuesday.


lsz162-190415-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
408 pm edt thu apr 18 2024 /308 pm cdt thu apr 18 2024/

.late this afternoon...southwest winds 15 to 25 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...west winds 15 to 25 knots. waves building to 3 to
6 feet occasionally to 8 feet. 
.friday...west winds 20 to 30 knots increasing to 30 knots with a
few gale force gusts to 35 knots possible late. waves building to
5 to 8 feet occasionally to 10 feet, then subsiding to 3 to
6 feet occasionally to 8 feet. 
.friday night...west winds 20 to 30 knots veering northwest late.
waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.saturday...northwest winds 15 to 25 knots backing west by mid
afternoon. waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet. 
.saturday night...west winds 15 to 25 knots. waves subsiding to
2 to 4 feet. 
.sunday...west winds 15 to 25 knots. waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.sunday night...northwest winds 10 to 20 knots becoming east 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...east winds 10 to 20 knots becoming northeast 15 to
25 knots. a chance of rain showers. waves building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...northeast winds 15 to 25 knots. a chance of rain and
snow showers. waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 1 to 3 feet. 

$$
fzus63 kmqt 182008
glfls 
expires:202404190415;;974299

open lake forecast for lake superior
national weather service marquette mi
408 pm edt thu apr 18 2024

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

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

.synopsis... a broad area of low pressure is centered over northwestern
ontario at 29.8 inches this afternoon. this area of low pressure 
slowly moves over far northern ontario tonight and into james bay
saturday morning, deepening to 29.3 inches. meanwhile, a 30.4 
inch high pressure ridge builds southeast into the northern plains
extending weak 30.0 inch ridging across western lake superior. 
the ridge builds to 30.1 inches on saturday, creating a tight 
southwest to northeast pressure gradient over the lake saturday 
morning. the gradient begins to slack on sunday as 30.3 inch high 
pressure slides into the southern plains, and a weak 29.9 inch 
trough extending from quebec dips over the east half of lake 
superior. a brief period of 30.1 inch high pressure meanders south
out of the canadian prairie sunday night into monday before broad
29.7 inch low pressure begins moving eastward into the great 
lakes on tuesday.


lsz263-190415-
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-
408 pm edt thu apr 18 2024

...gale warning in effect from friday morning through friday
evening...

.late this afternoon...west winds 15 to 25 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...west winds 15 to 25 knots. waves subsiding to 3 to
5 feet occasionally to 7 feet, then building to 4 to 7 feet
occasionally to 9 feet. 
.friday...west winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. waves building to 7 to 11 feet
occasionally to 14 feet. 
.friday night...west winds 20 to 30 knots becoming northwest
15 to 25 knots late. waves subsiding to 4 to 7 feet occasionally
to 9 feet. 
.saturday...northwest winds 15 to 25 knots backing west by mid
afternoon. waves subsiding to 3 to 6 feet occasionally to 8 feet,
then building to 4 to 7 feet occasionally to 9 feet. 
.saturday night...west winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.sunday...west winds 15 to 25 knots diminishing to 10 to 20 knots
by mid afternoon. waves subsiding to 3 to 5 feet occasionally to
7 feet. 
.sunday night...east winds 5 to 15 knots veering southeast after
midnight. waves subsiding to calm to 2 feet. 
.monday...east winds 5 to 15 knots becoming northeast 15 to
25 knots. a chance of rain showers. a chance of snow showers.
waves building to 3 to 5 feet occasionally to 7 feet. 
.tuesday...northeast winds 15 to 25 knots diminishing to 10 to
20 knots. a chance of rain and snow showers. waves building to
3 to 6 feet occasionally to 8 feet, then subsiding to 1 to
3 feet. 

$$
fzus63 kmqt 182008
glfls 
expires:202404190415;;974300

open lake forecast for lake superior
national weather service marquette mi
408 pm edt thu apr 18 2024

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

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

.synopsis... a broad area of low pressure is centered over northwestern
ontario at 29.8 inches this afternoon. this area of low pressure 
slowly moves over far northern ontario tonight and into james bay
saturday morning, deepening to 29.3 inches. meanwhile, a 30.4 
inch high pressure ridge builds southeast into the northern plains
extending weak 30.0 inch ridging across western lake superior. 
the ridge builds to 30.1 inches on saturday, creating a tight 
southwest to northeast pressure gradient over the lake saturday 
morning. the gradient begins to slack on sunday as 30.3 inch high 
pressure slides into the southern plains, and a weak 29.9 inch 
trough extending from quebec dips over the east half of lake 
superior. a brief period of 30.1 inch high pressure meanders south
out of the canadian prairie sunday night into monday before broad
29.7 inch low pressure begins moving eastward into the great 
lakes on tuesday.


lsz264-190415-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
408 pm edt thu apr 18 2024

...gale warning in effect from friday morning through friday
evening...

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

$$
fzus63 kmqt 182008
glfls 
expires:202404190415;;974301

open lake forecast for lake superior
national weather service marquette mi
408 pm edt thu apr 18 2024

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

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

.synopsis... a broad area of low pressure is centered over northwestern
ontario at 29.8 inches this afternoon. this area of low pressure 
slowly moves over far northern ontario tonight and into james bay
saturday morning, deepening to 29.3 inches. meanwhile, a 30.4 
inch high pressure ridge builds southeast into the northern plains
extending weak 30.0 inch ridging across western lake superior. 
the ridge builds to 30.1 inches on saturday, creating a tight 
southwest to northeast pressure gradient over the lake saturday 
morning. the gradient begins to slack on sunday as 30.3 inch high 
pressure slides into the southern plains, and a weak 29.9 inch 
trough extending from quebec dips over the east half of lake 
superior. a brief period of 30.1 inch high pressure meanders south
out of the canadian prairie sunday night into monday before broad
29.7 inch low pressure begins moving eastward into the great 
lakes on tuesday.


lsz265-190415-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
408 pm edt thu apr 18 2024

...gale warning in effect from friday afternoon through late
friday night...

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

$$
fzus63 kmqt 182008
glfls 
expires:202404190415;;974302

open lake forecast for lake superior
national weather service marquette mi
408 pm edt thu apr 18 2024

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

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

.synopsis... a broad area of low pressure is centered over northwestern
ontario at 29.8 inches this afternoon. this area of low pressure 
slowly moves over far northern ontario tonight and into james bay
saturday morning, deepening to 29.3 inches. meanwhile, a 30.4 
inch high pressure ridge builds southeast into the northern plains
extending weak 30.0 inch ridging across western lake superior. 
the ridge builds to 30.1 inches on saturday, creating a tight 
southwest to northeast pressure gradient over the lake saturday 
morning. the gradient begins to slack on sunday as 30.3 inch high 
pressure slides into the southern plains, and a weak 29.9 inch 
trough extending from quebec dips over the east half of lake 
superior. a brief period of 30.1 inch high pressure meanders south
out of the canadian prairie sunday night into monday before broad
29.7 inch low pressure begins moving eastward into the great 
lakes on tuesday.


lsz266-190415-
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-
408 pm edt thu apr 18 2024

...gale warning in effect from friday afternoon through late
friday night...

.late this afternoon...south winds 10 to 20 knots. a slight
chance of rain showers. waves 1 to 3 feet building to 2 to
4 feet. 
.tonight...southwest winds 10 to 20 knots veering west after
midnight, then increasing to 15 to 25 knots late. a chance of
rain showers through midnight. sprinkles after midnight. waves
building to 3 to 6 feet occasionally to 8 feet. 
.friday...west winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. waves building to 9 to 12 feet
occasionally to 15 feet. 
.friday night...west gales to 35 knots. a slight chance of rain
showers after midnight. waves subsiding to 5 to 8 feet
occasionally to 10 feet, then building to 6 to 9 feet
occasionally to 11 feet. 
.saturday...northwest gales to 35 knots becoming west 20 to
30 knots by mid afternoon. waves subsiding to 4 to 7 feet
occasionally to 9 feet. 
.saturday night...west winds 15 to 25 knots. waves subsiding to
3 to 6 feet occasionally to 8 feet. 
.sunday...west winds 20 to 30 knots veering northwest by mid
afternoon. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 
.sunday night...north winds 10 to 20 knots backing southwest
after midnight. waves subsiding to calm to 2 feet. 
.monday...southwest winds 10 to 20 knots backing northeast. a
chance of rain showers. waves building to 2 to 4 feet. 
.tuesday...north winds 20 to 30 knots diminishing to 15 to
25 knots. a chance of rain showers. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 

$$
fzus63 kmqt 182008
glfls 
expires:202404190415;;974303

open lake forecast for lake superior
national weather service marquette mi
408 pm edt thu apr 18 2024

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

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

.synopsis... a broad area of low pressure is centered over northwestern
ontario at 29.8 inches this afternoon. this area of low pressure 
slowly moves over far northern ontario tonight and into james bay
saturday morning, deepening to 29.3 inches. meanwhile, a 30.4 
inch high pressure ridge builds southeast into the northern plains
extending weak 30.0 inch ridging across western lake superior. 
the ridge builds to 30.1 inches on saturday, creating a tight 
southwest to northeast pressure gradient over the lake saturday 
morning. the gradient begins to slack on sunday as 30.3 inch high 
pressure slides into the southern plains, and a weak 29.9 inch 
trough extending from quebec dips over the east half of lake 
superior. a brief period of 30.1 inch high pressure meanders south
out of the canadian prairie sunday night into monday before broad
29.7 inch low pressure begins moving eastward into the great 
lakes on tuesday.


lsz267-190415-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
408 pm edt thu apr 18 2024

...gale warning in effect from friday afternoon through late
friday night...

.late this afternoon...south winds 5 to 15 knots. a slight chance
of rain showers. waves 1 to 3 feet.
.tonight...south winds 5 to 15 knots becoming west 10 to 20 knots
after midnight. a chance of rain showers. waves building to 2 to
4 feet. 
.friday...west winds 15 to 25 knots increasing to gales to
40 knots in the afternoon. waves building to 7 to 10 feet
occasionally to 13 feet. 
.friday night...west gales to 35 knots. a slight chance of rain 
showers. a slight chance of snow showers after midnight. waves 
subsiding to 6 to 9 feet occasionally to 11 feet. 
.saturday...northwest gales to 35 knots backing west by mid
afternoon. a slight chance of snow showers through early
afternoon. waves subsiding to 5 to 8 feet occasionally to
10 feet. 
.saturday night...west winds 15 to 25 knots. waves subsiding to
3 to 6 feet occasionally to 8 feet. 
.sunday...west winds 20 to 30 knots veering northwest by mid
afternoon. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 
.sunday night...northwest winds 10 to 20 knots backing west after
midnight. waves subsiding to 1 to 3 feet. 
.monday...southwest winds 10 to 20 knots becoming east 15 to
25 knots. a chance of rain showers. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 
.tuesday...north winds 15 to 25 knots increasing to 20 to
30 knots. a chance of rain showers. waves building to 2 to
4 feet. 

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