fzus63 kdtx 172007
glflh 
311 

open lake forecast for lake huron
national weather service detroit/pontiac mi
307 pm est sun jan 17 2021

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...a weak upper-level disturbance will track eastward
across the northern ohio valley the remainder of today as a
frontal boundary remains draped across the central great lakes.
broad low pressure, averaging 29.90 inches, then remains in place
across the great lakes monday and tuesday before a higher ridge
of pressure, 30.10 inches, builds eastward into the region for
the middle of the week.

lhz361-180900-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
307 pm est sun jan 17 2021

.tonight...north winds 5 to 10 knots. waves 2 feet or less. 
.monday...northeast winds 5 to 10 knots in the morning becoming
light and variable. waves 2 feet or less. 
.monday night...light and variable winds becoming southwest 5 to
10 knots after midnight. a chance of snow. waves 2 feet or less. 
.tuesday...west winds 10 to 15 knots increasing to 15 to 20 knots
in the late morning and afternoon. waves 1 to 3 feet building to
3 to 5 feet in the late morning and afternoon. 
.tuesday night...northwest winds 15 to 20 knots decreasing to
10 to 15 knots in the late evening and overnight. waves 3 to
5 feet. 
.wednesday...northwest winds 5 to 10 knots backing to the
southwest late in the morning...then increasing to 15 to 20 knots
late in the afternoon. a chance of snow late in the afternoon. a
chance of rain late in the evening. waves 1 to 3 feet building to
3 to 5 feet late in the afternoon. 
.thursday...west winds 15 to 20 knots. waves 4 to 6 feet. waves
occasionally around 8 feet. 
.friday...northwest winds 15 to 20 knots decreasing to 10 to
15 knots. waves 3 to 5 feet. 


$$

fzus63 kdtx 172007
glflh 

lhz362-363-180900-
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-
307 pm est sun jan 17 2021

.tonight...north winds 10 to 15 knots decreasing to 5 to 10 knots
after midnight. a chance of snow after midnight. waves 1 to
3 feet. 
.monday...north winds 5 to 10 knots until late afternoon becoming
light and variable. a chance of snow in the morning. waves 2 feet
or less. 
.monday night...light and variable winds becoming southwest 5 to
10 knots in the late evening and early morning...then becoming
west 10 to 15 knots after midnight. a chance of snow. waves
2 feet or less building to 2 to 4 feet after midnight. 
.tuesday...west winds 15 to 20 knots. waves 3 to 5 feet. 
.tuesday night...west winds 15 to 20 knots. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.wednesday...west winds 10 to 15 knots becoming southwest 15 to
20 knots with gusts to around 30 knots late in the afternoon...
then becoming south 20 to 25 knots with gusts to around 30 knots
late in the evening. waves 3 to 5 feet building to 6 to 9 feet
late in the evening. waves occasionally around 12 feet. 
.thursday...west winds 15 to 20 knots with gusts to around
30 knots. waves 5 to 7 feet. waves occasionally around 10 feet. 
.friday...northwest winds 15 to 20 knots. waves 5 to 7 feet.
waves occasionally around 10 feet. 


$$

fzus63 kdtx 172007
glflh 

lhz462>464-180900-
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-
307 pm est sun jan 17 2021

.tonight...northwest winds 5 to 10 knots. a chance of snow. waves
1 to 3 feet. 
.monday...northwest winds 5 to 10 knots. snow likely in the
morning...then a chance of snow in the afternoon. waves 1 to
3 feet. 
.monday night...west winds 5 to 10 knots increasing to 15 to
20 knots. a chance of snow. waves 1 to 3 feet building to 2 to
4 feet after midnight. 
.tuesday...west winds 15 to 20 knots. waves 3 to 5 feet. 
.tuesday night...west winds 15 to 20 knots. waves 4 to 6 feet. 
.wednesday...west winds 15 to 20 knots decreasing to 10 to
15 knots late in the morning...then becoming southwest 15 to
20 knots late in the afternoon increasing to 20 to 25 knots with
gusts to around 30 knots late in the evening. waves 4 to 6 feet.
waves occasionally around 8 feet. 
.thursday...west winds 15 to 20 knots with gusts to around
30 knots. waves 4 to 6 feet. waves occasionally around 8 feet. 
.friday...northwest winds 15 to 20 knots. waves 4 to 6 feet. 


$$

fzus63 kmkx 172051
glflm 
738 

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
251 pm cst sun jan 17 2021

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... 

modest northwest winds will continue through tonight. winds will 
increase slightly and shift to the west-northwest for monday as 
low pressure around 29.9 inches moves across the northern great 
lakes. the next low around 29.1 inches will cross manitoba and 
ontario wednesday through thursday while weakening to 29.4 inches.
gusty southwest winds ahead of the trough may reach gale force
wednesday afternoon and evening. gusty northwest winds should
remain below gales behind the cold front wednesday night through
friday. 

&&

lmz261-362-364-366-563-565-567-868-180430-
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-
251 pm cst sun jan 17 2021

sheboygan wi to pentwater mi north...

.tonight...north winds 10 to 20 kt diminishing to 10 to 15 kt.
scattered snow showers with a chance of rain showers. waves 2 to
4 ft. 
.monday...north winds 10 to 15 kt becoming west 10 to 20 kt.
scattered snow showers in the morning, then isolated snow showers
in the afternoon. waves 1 to 3 ft. 
.monday night...west winds 10 to 20 kt becoming northwest. chance
of snow in the evening. waves 3 to 5 ft. 
.tuesday...northwest winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.tuesday night...northwest winds 10 to 20 kt becoming west. waves
4 to 6 ft occasionally to 8 ft. 
.wednesday...west winds 10 to 20 kt becoming southwest to 30 kt
in the afternoon. waves 3 to 5 ft building to 6 to 9 ft
occasionally to 12 ft. 
.wednesday night...southwest gales to 35 kt diminishing to 30 kt.
waves 8 to 12 ft occasionally to 16 ft. 
.thursday...west winds to 30 kt. waves 6 to 9 ft occasionally to
12 ft. 
.friday...northwest winds to 30 kt diminishing to 15 to 25 kt.
waves 5 to 8 ft occasionally to 10 ft.  

$$

fzus63 kmkx 172051
glflm 

lmz080-669-671-673-675-777-779-870-872-874-876-878-180430-
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-
251 pm cst sun jan 17 2021

sheboygan wi to pentwater mi south...

.tonight...northwest winds 10 to 20 kt. scattered snow showers
with a chance of rain showers. waves 3 to 5 ft. 
.monday...northwest winds 10 to 20 kt becoming west. scattered
snow showers in the morning, then isolated snow showers in the
afternoon. waves 3 to 5 ft. 
.monday night...west winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.tuesday...west winds 10 to 20 kt. waves 4 to 7 ft occasionally
to 9 ft. 
.tuesday night...west winds 15 to 25 kt. waves 4 to 7 ft
occasionally to 9 ft. 
.wednesday...west winds 10 to 20 kt becoming southwest to 30 kt
in the afternoon. waves 4 to 6 ft occasionally to 8 ft building
to 4 to 7 ft occasionally to 9 ft. 
.wednesday night...southwest gales to 35 kt. waves 7 to 10 ft
occasionally to 13 ft. 
.thursday...west winds 15 to 25 kt increasing to 30 kt. waves
5 to 8 ft occasionally to 10 ft. 
.friday...northwest winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmqt 172059
glfls 
257 

open lake forecast for lake superior
national weather service marquette mi
359 pm est sun jan 17 2021

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 29.9 inch surface trough will linger over lake 
superior through monday. on monday night, a weak 29.8 inch low 
develops over eastern lake superior and shifts into the southeast
ontario on tuesday. a 30.1 inch ridge builds over lake superior on
tuesday. a broad 29.2 inch low over northern saskatchewan 
wednesday morning will move southeast into ontario an weaken to
29.3 inches by thursday morning. ridging of 30.2 inches will build
over lake superior on friday. 

lsz162-180500-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
359 pm est sun jan 17 2021 /259 pm cst sun jan 17 2021/

.late this afternoon...northwest winds 5 to 15 knots. flurries.
waves calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots veering north by
midnight, then becoming northwest 10 to 20 knots late. a slight
chance of freezing drizzle in the evening. a chance of snow
showers. waves calm to 2 feet. 
.monday...northwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. a chance of snow showers. waves calm
to 2 feet. 
.monday night...northwest winds 15 to 25 knots. a slight chance
of snow showers. waves building to 1 to 3 feet. 
.tuesday...northwest winds 10 to 20 knots. a chance of snow
showers. waves subsiding to calm to 2 feet, then building to 1 to
3 feet. 
.tuesday night...northwest winds 10 to 20 knots backing west
after midnight. waves 1 to 3 feet. 
.wednesday...southwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.wednesday night...west winds 20 to 30 knots. waves building to
4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.thursday...west winds 20 to 30 knots becoming northwest 15 to
25 knots. freezing spray. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.friday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 172059
glfls 

lsz263-180500-
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-
359 pm est sun jan 17 2021

.late this afternoon...north winds 5 to 15 knots. flurries and a
slight chance of freezing drizzle. waves 1 to 3 feet subsiding to
calm to 2 feet. 
.tonight...north winds 5 to 15 knots. a slight chance of freezing
drizzle in the evening. a chance of snow showers. waves calm to
2 feet. 
.monday...north winds 5 to 15 knots increasing to 15 to 25 knots.
a chance of snow showers. waves building to 2 to 4 feet. 
.monday night...north winds 20 to 30 knots. a chance of snow
showers. freezing spray after midnight. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.tuesday...north winds 15 to 25 knots becoming northwest 10 to
20 knots in the afternoon. freezing spray in the morning. a
chance of snow showers. waves subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 10 to 20 knots backing west
after midnight. freezing spray in the evening. a chance of snow
showers. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.wednesday...southwest winds 10 to 20 knots becoming south 20 to
30 knots in the afternoon. waves building to 4 to 7 feet
occasionally to 9 feet. 
.wednesday night...southwest winds 20 to 30 knots veering west
after midnight. a chance of rain showers. waves building to 5 to
8 feet occasionally to 10 feet. 
.thursday...west winds 20 to 30 knots becoming northwest 15 to
25 knots. a chance of rain showers. a chance of snow showers.
freezing spray. waves subsiding to 3 to 5 feet occasionally to
7 feet. 
.friday...northwest winds 10 to 20 knots. freezing spray. a
chance of snow showers. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 172059
glfls 

lsz264-180500-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
359 pm est sun jan 17 2021

.late this afternoon...north winds 5 to 15 knots. a chance of
snow showers and a slight chance of freezing drizzle. waves 1 to
3 feet. 
.tonight...northeast winds 5 to 15 knots backing north late. a
chance of snow showers. waves subsiding to calm to 2 feet. 
.monday...north winds 5 to 15 knots increasing to 15 to 25 knots
by mid afternoon. a chance of snow showers in the morning, then
snow showers likely in the afternoon. waves building to 2 to
4 feet. 
.monday night...north winds 20 to 30 knots diminishing to 15 to
25 knots by midnight, then increasing to 20 to 30 knots late.
freezing spray. a chance of snow showers. waves building to 3 to
5 feet occasionally to 7 feet. 
.tuesday...north winds 20 to 30 knots becoming northwest 5 to
15 knots in the afternoon. freezing spray. a chance of snow
showers. waves subsiding to 2 to 4 feet. 
.tuesday night...northwest winds 5 to 15 knots. a chance of snow
showers. waves subsiding to 1 to 3 feet. 
.wednesday...southwest winds 10 to 20 knots becoming south 20 to
30 knots in the afternoon. a chance of snow showers. waves
building to 4 to 7 feet occasionally to 9 feet. 
.wednesday night...southwest winds 15 to 25 knots veering west
after midnight. a chance of snow showers. waves building to 5 to
8 feet occasionally to 10 feet. 
.thursday...west winds 15 to 25 knots veering northwest. a chance
of snow showers. freezing spray. waves subsiding to 4 to 7 feet
occasionally to 9 feet. 
.friday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots. freezing spray. a chance of snow showers. waves
subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 172059
glfls 

lsz265-180500-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
359 pm est sun jan 17 2021

.late this afternoon...north winds 10 to 20 knots. a chance of
snow showers and a slight chance of freezing drizzle. waves 1 to
3 feet. 
.tonight...north winds 10 to 20 knots diminishing to 5 to
15 knots by midnight, then becoming northwest 10 to 20 knots
late. a slight chance of freezing drizzle in the evening. a
chance of snow showers. waves subsiding to calm to 2 feet. 
.monday...northwest winds 5 to 15 knots becoming west 10 to
20 knots. a chance of snow showers. waves calm to 2 feet. 
.monday night...northwest winds 20 to 30 knots. a chance of snow
showers. freezing spray after midnight. waves building to 3 to
5 feet occasionally to 7 feet. 
.tuesday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. freezing spray. a chance of snow
showers. waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 2 to 4 feet. 
.tuesday night...northwest winds 10 to 20 knots backing west
after midnight. freezing spray in the evening. a chance of snow
showers. waves subsiding to 1 to 3 feet. 
.wednesday...southwest winds 10 to 20 knots becoming south 15 to
25 knots in the afternoon. waves subsiding to calm to 2 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.wednesday night...southwest winds 20 to 30 knots veering west
after midnight. a chance of snow showers. waves building to 3 to
6 feet occasionally to 8 feet. 
.thursday...west gales to 35 knots becoming northwest 20 to
30 knots. a chance of snow showers, then snow showers likely.
freezing spray. waves building to 3 to 6 feet occasionally to
8 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. freezing spray. a chance of snow showers. waves
subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 172059
glfls 

lsz266-180500-
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-
359 pm est sun jan 17 2021

.late this afternoon...north winds 10 to 20 knots. a chance of
snow showers and a slight chance of freezing drizzle. waves 1 to
3 feet. 
.tonight...northeast winds 10 to 20 knots becoming east 5 to
15 knots late. a slight chance of freezing drizzle in the
evening. a chance of snow showers. waves subsiding to calm to
2 feet. 
.monday...east winds 5 to 15 knots veering southeast by late
morning, then becoming southwest 10 to 20 knots by mid afternoon.
a chance of snow showers. waves building to 1 to 3 feet. 
.monday night...northwest winds 15 to 25 knots increasing to
20 to 30 knots late. a chance of snow showers. freezing spray
after midnight. waves building to 3 to 6 feet occasionally to
8 feet. 
.tuesday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. freezing spray. snow showers likely.
waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.tuesday night...northwest winds 10 to 20 knots. freezing spray.
snow showers likely in the evening. a chance of snow showers
after midnight. waves subsiding to 2 to 4 feet. 
.wednesday...southwest winds 10 to 20 knots becoming south 20 to
30 knots in the afternoon. a chance of snow showers. waves
building to 5 to 8 feet occasionally to 10 feet. 
.wednesday night...southwest winds 20 to 30 knots veering west
after midnight. a chance of snow showers. waves building to 5 to
9 feet occasionally to 11 feet. 
.thursday...west winds 20 to 30 knots veering northwest. a chance
of snow showers, then snow showers likely. freezing spray. waves
building to 6 to 10 feet occasionally to 13 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. freezing spray. snow showers likely. a chance of snow
showers. waves subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 172059
glfls 

lsz267-180500-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
359 pm est sun jan 17 2021

.late this afternoon...northeast winds 10 to 20 knots. waves 1 to
3 feet. 
.tonight...northeast winds 10 to 20 knots veering east by
midnight. waves subsiding to calm to 2 feet. 
.monday...east winds 10 to 20 knots becoming southeast 5 to
15 knots by late morning, then veering south by mid afternoon. a
chance of snow showers. waves calm to 2 feet. 
.monday night...south winds 10 to 20 knots becoming west 15 to
25 knots by midnight, then veering northwest late. a chance of
snow showers in the evening, then snow showers likely after
midnight. waves building to 3 to 5 feet occasionally to 7 feet. 
.tuesday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. freezing spray. a chance of snow
showers. waves building to 3 to 6 feet occasionally to 8 feet. 
.tuesday night...northwest winds 10 to 20 knots. freezing spray
in the evening. snow showers likely in the evening, then a chance
of snow showers after midnight. waves subsiding to 2 to 4 feet. 
.wednesday...southwest winds 10 to 20 knots becoming south 20 to
30 knots in the afternoon. a chance of snow showers. waves
building to 4 to 7 feet occasionally to 9 feet. 
.wednesday night...south winds 20 to 30 knots veering southwest
after midnight. snow showers likely. waves building to 5 to
8 feet occasionally to 10 feet. 
.thursday...west winds 20 to 30 knots veering northwest. snow
showers likely, then a chance of snow showers. waves building to
7 to 10 feet occasionally to 13 feet, then subsiding to 5 to
8 feet occasionally to 10 feet. 
.friday...northwest winds 15 to 25 knots becoming north 10 to
20 knots. a chance of snow showers. waves subsiding to 2 to
4 feet. 

$$