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fzus63 kdtx 190149
glflh 
523 

open lake forecast for lake huron
national weather service detroit/pontiac mi
949 pm edt wed oct 18 2017

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...low pressure over james bay, 29.91 inches, will drag a 
cold front through lake huron and lower michigan overnight through 
thursday morning. the front will weaken as it moves south of lake 
erie by evening followed by weak high pressure through friday. a 
larger low pressure system will then develop over the plains and 
produce moderate south wind over marine areas through the weekend.

lhz361-190815-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
949 pm edt wed oct 18 2017

.rest of tonight...southwest winds 20 to 25 knots. gusts to
30 knots in the late evening and early morning. waves 5 to
7 feet. waves occasionally around 10 feet. 
.thursday...west winds 15 to 20 knots increasing to 20 to
25 knots with gusts to 30 knots in the afternoon. waves 5 to
7 feet. waves occasionally around 10 feet. 
.thursday night...west winds 15 to 20 knots becoming southwest
10 to 15 knots after midnight. waves 4 to 6 feet. 
.friday...southwest winds 10 to 15 knots becoming south 5 to
10 knots in the late morning and afternoon. waves 1 to 3 feet.
waves occasionally around 8 feet. 
.friday night...south winds 5 to 10 knots increasing to 10 to
15 knots in the late evening and early morning...then decreasing
to 5 to 10 knots after midnight. waves 1 to 3 feet. 
.saturday...south winds 5 to 10 knots increasing to 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.sunday...south winds 10 to 15 knots becoming west 5 to 10 knots
in the late evening and early morning. showers likely in the
afternoon and evening. a chance of showers in the late evening
and early morning. waves 2 to 4 feet. 
.monday...southwest winds 5 to 10 knots. a chance of showers in
the afternoon and evening. rain showers likely after midnight.
waves 1 to 3 feet. 


$$
fzus63 kdtx 190149
glflh 

lhz362-363-190815-
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-
949 pm edt wed oct 18 2017

.rest of tonight...southwest winds to 30 knots decreasing to
20 to 25 knots early in the morning. waves 8 to 12 feet. waves
occasionally around 15 feet. 
.thursday...west winds 15 to 20 knots. gusts to 30 knots early in
the morning. waves 6 to 9 feet. waves occasionally around
12 feet. 
.thursday night...west winds 15 to 20 knots decreasing to 10 to
15 knots after midnight. waves 4 to 6 feet. 
.friday...southwest winds 5 to 10 knots becoming south 10 to
15 knots in the late morning and afternoon. 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 early in the afternoon.
waves occasionally around 8 feet. 
.friday night...south winds 10 to 15 knots increasing to 15 to
20 knots in the late evening and early morning...then decreasing
to 10 to 15 knots after midnight. waves 3 to 5 feet. 
.saturday...south winds 10 to 15 knots increasing to 15 to
20 knots. waves 3 to 5 feet. 
.sunday...south winds 15 to 20 knots becoming southwest 10 to
15 knots in the late evening and early morning. a chance of
showers in the afternoon and evening. rain showers likely late in
the evening...then a chance of showers after midnight. waves 5 to
7 feet. waves occasionally around 10 feet. 
.monday...southwest winds 10 to 15 knots. a chance of showers.
waves 3 to 5 feet. 


$$
fzus63 kdtx 190149
glflh 

lhz462>464-190815-
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-
949 pm edt wed oct 18 2017

.rest of tonight...southwest winds 20 to 25 knots. waves 5 to
7 feet. waves occasionally around 10 feet. 
.thursday...southwest winds 15 to 20 knots becoming west 10 to
15 knots in the afternoon. waves 4 to 6 feet. waves occasionally
around 8 feet. 
.thursday night...west winds 10 to 15 knots. waves 3 to 5 feet. 
.friday...southwest winds 5 to 10 knots becoming south 10 to
15 knots early in the afternoon. waves 1 to 3 feet. 
.friday night...south winds 10 to 15 knots. waves 2 to 4 feet. 
.saturday...south winds 10 to 15 knots. waves 2 to 4 feet. 
.sunday...south winds 10 to 15 knots increasing to 15 to 20 knots
until early evening...then becoming southwest 10 to 15 knots in
the late evening and early morning. a chance of showers in the
afternoon. rain showers likely until early morning. waves 4 to
6 feet. waves occasionally around 8 feet. 
.monday...south winds 10 to 15 knots. a chance of showers. waves
1 to 3 feet building to 2 to 4 feet until early morning. 


$$
fzus63 klot 190151
glflm 
533 

open lake forecast for lake michigan
national weather service chicago/romeoville il
851 pm cdt wed oct 18 2017

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...expansive high pressure of 30.4 inches will remain 
over the eastern ohio valley and mid atlantic coast through 
friday. a strong low averaging 28.8 inches will take an eastward 
track across northern manitoba to hudson bay by thursday. the cold
front trailing from this low will move across the lake tonight 
into thursday. another strong low pressure area will move across 
the canadian prairies on friday and saturday...and to hudson bay 
on sunday, with its trailing cold front crossing the lake over the
weekend.

lmz261-362-364-366-563-565-567-669-868-870-190930-
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 sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
851 pm cdt wed oct 18 2017

port washington wi to whitehall mi north...

...gale warning in effect until 3 am cdt thursday...

.rest of tonight...southwest gales to 40 kt becoming west to 30 
kt after midnight, and then diminishing to 15 to 25 kt late. 
waves 12 to 16 ft occasionally to 21 ft subsiding to 6 to 9 ft 
occasionally to 12 ft. 
.thursday...west winds 15 to 25 kt becoming southwest. waves 4 to
7 ft occasionally to 9 ft subsiding to 3 to 5 ft. 
.thursday night...southwest winds 10 to 20 kt. waves 3 to 5 ft. 
.friday...south winds 15 to 25 kt increasing to 30 kt. waves 3 to
5 ft building to 4 to 7 ft occasionally to 9 ft.
.friday night...south winds to 30 kt. waves 4 to 7 ft
occasionally to 9 ft. 
.saturday...south winds to 30 kt. waves 6 to 9 ft occasionally to
12 ft. 
.saturday night...south winds to 30 kt. chance of showers. waves
6 to 9 ft occasionally to 12 ft. 
.sunday...southwest winds to 30 kt. showers likely. waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 7 ft occasionally to
9 ft. 
.monday...south winds to 30 kt. chance of showers. waves 4 to
7 ft occasionally to 9 ft.  

$$
fzus63 klot 190151
glflm 

lmz080-671-673-675-777-779-872-874-876-878-190930-
lake michigan from michigan city in to st. joseph mi 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 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-
851 pm cdt wed oct 18 2017

port washington wi to whitehall mi south...

.rest of tonight...southwest winds to 30 kt becoming west 15 to
25 kt. waves 7 to 10 ft occasionally to 13 ft subsiding to 5 to
8 ft occasionally to 10 ft. 
.thursday...northwest winds 10 to 20 kt becoming southwest 10 to
15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.thursday night...south winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 3 ft. 
.friday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 3 to 5 ft. 
.friday night...south 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...south winds to 30 kt. waves 4 to 7 ft occasionally to
9 ft. 
.saturday night...south winds to 30 kt. chance of showers. waves
5 to 8 ft occasionally to 10 ft. 
.sunday...south winds to 30 kt becoming west. chance of showers.
waves 5 to 8 ft occasionally to 10 ft. 
.monday...south winds to 30 kt. chance of showers. waves 4 to
7 ft occasionally to 9 ft.  

$$
fzus63 kmqt 190143
glfls 
795 

open lake forecast for lake superior
national weather service marquette mi
943 pm edt wed oct 18 2017

for waters beyond five 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 28.7 inch low near hudson bay through thursday will
push a trough of 29.7 inches across lake superior tonight. a 
nearly stationary 30.2 inch area of high pressure across the mid 
atlantic states will push a 30.0 inch ridge across lake superior 
thursday into friday. a 29.1 inch low pressure over the canadian 
prairies on friday will track toward hudson bay through sunday, 
passing a 29.8 inch trough across lake superior by saturday night.
weak ridging of 30.0 inches will track eastward across lake 
superior on sunday ahead of a 29.7 inch trough approaching from 
the west on monday.

lsz162-190945-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
943 pm edt wed oct 18 2017 /843 pm cdt wed oct 18 2017/

.rest of tonight...west winds 20 to 30 knots diminishing to 15 to
25 knots late. waves 3 to 6 feet occasionally to 8 feet building
to 4 to 7 feet occasionally to 9 feet. 
.thursday...west winds 15 to 25 knots backing southwest in the
afternoon, then diminishing to 10 to 20 knots late. waves
subsiding to 1 to 3 feet. 
.thursday night...southwest winds 10 to 20 knots. waves 1 to
3 feet. 
.friday...south winds 10 to 20 knots. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 
.friday night...south winds 10 to 20 knots. waves building to
2 to 4 feet. 
.saturday...south winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. a chance of showers. waves subsiding
to 1 to 3 feet. 
.saturday night...south winds 10 to 20 knots veering southwest
after midnight. a chance of showers. waves 1 to 3 feet. 
.sunday...southwest winds 10 to 20 knots. a chance of showers.
waves subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.monday...west winds 15 to 25 knots veering northwest. showers
likely, then a chance of showers. waves building to 3 to 5 feet
occasionally to 7 feet. 

$$
fzus63 kmqt 190143
glfls 

lsz267-190945-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
943 pm edt wed oct 18 2017

.rest of tonight...southwest winds 20 to 30 knots with gale force
gusts to 35 knots becoming west 20 to 30 knots after midnight. 
waves 4 to 7 feet occasionally to 9 feet building to 7 to 10 feet
occasionally to 13 feet. 
.thursday...west winds 20 to 30 knots with gale force gusts to 35
knots diminishing to 15 to 25 knots late. waves building to 8 to 
11 feet occasionally to 14 feet, then subsiding to 6 to 9 feet 
occasionally to 11 feet.
.thursday night...west winds 10 to 20 knots backing southwest
after midnight. waves subsiding to 1 to 3 feet. 
.friday...south winds 15 to 25 knots. waves 1 to 3 feet. 
.friday night...south winds 15 to 25 knots. waves building to
2 to 4 feet. 
.saturday...south winds 15 to 25 knots. a chance of showers.
waves 2 to 4 feet. 
.saturday night...south winds 15 to 25 knots. a chance of
showers. waves 2 to 4 feet. 
.sunday...southwest winds 15 to 25 knots. showers likely. waves
subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.monday...south winds 15 to 25 knots veering southwest. a chance
of showers. waves subsiding to 1 to 3 feet, then building to 2 to
4 feet. 

$$
fzus63 kmqt 190143
glfls 

lsz263-190945-
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-
943 pm edt wed oct 18 2017

.rest of tonight...west winds 20 to 30 knots. waves 5 to 9 feet
occasionally to 11 feet. 
.thursday...west winds 20 to 30 knots becoming southwest 15 to
25 knots late. waves subsiding to 3 to 5 feet occasionally to
7 feet. 
.thursday night...southwest winds 10 to 20 knots. waves subsiding
to 1 to 3 feet, then building to 2 to 4 feet. 
.friday...south winds 5 to 15 knots. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 
.friday night...south winds 10 to 20 knots. waves building to
2 to 4 feet. 
.saturday...south winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. a chance of showers. waves subsiding
to 1 to 3 feet. 
.saturday night...south winds 10 to 20 knots veering southwest
after midnight. a chance of showers. waves building to 2 to
4 feet. 
.sunday...southwest winds 10 to 20 knots. a chance of showers.
waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.monday...west winds 15 to 25 knots veering northwest. showers
likely, then a chance of showers. waves subsiding to 1 to 3 feet,
then building to 3 to 6 feet occasionally to 8 feet. 

$$
fzus63 kmqt 190143
glfls 

lsz264-190945-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
943 pm edt wed oct 18 2017

.rest of tonight...west winds 20 to 30 knots. waves 5 to 8 feet
occasionally to 10 feet building to 7 to 10 feet occasionally to
13 feet. 
.thursday...west winds 20 to 30 knots with gale force gusts to 35
knots...diminishing to 15 to 25 knots late. waves subsiding to 4 
to 7 feet occasionally to 9 feet.
.thursday night...southwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet,
then building to 2 to 4 feet. 
.friday...south winds 5 to 15 knots. waves subsiding to 1 to
3 feet, then building to 2 to 4 feet. 
.friday night...south winds 10 to 20 knots. waves building to
3 to 5 feet occasionally to 7 feet. 
.saturday...south winds 10 to 20 knots. waves 3 to 5 feet
occasionally to 7 feet. 
.saturday night...south winds 10 to 20 knots. a chance of showers
through midnight, then showers likely after midnight. waves 3 to
5 feet occasionally to 7 feet. 
.sunday...southwest winds 10 to 20 knots increasing to 15 to
25 knots. a chance of showers. waves subsiding to 2 to 4 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.monday...southwest winds 10 to 20 knots becoming north 15 to
25 knots. a chance of showers. waves subsiding to 2 to 4 feet,
then building to 3 to 5 feet occasionally to 7 feet. 

$$
fzus63 kmqt 190143
glfls 

lsz265-190945-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
943 pm edt wed oct 18 2017

.rest of tonight...west winds 20 to 30 knots. waves 2 to 4 feet
building to 4 to 7 feet occasionally to 9 feet. 
.thursday...west winds 20 to 30 knots diminishing to 10 to
20 knots late. waves building to 4 to 7 feet occasionally to
9 feet, then subsiding to 2 to 4 feet. 
.thursday night...southwest winds 10 to 20 knots. waves subsiding
to calm to 2 feet. 
.friday...south winds 10 to 20 knots. waves building to 2 to
4 feet. 
.friday night...south winds 15 to 25 knots. waves 2 to 4 feet. 
.saturday...south winds 15 to 25 knots. a chance of showers.
waves 2 to 4 feet. 
.saturday night...south winds 15 to 25 knots. a chance of showers
through midnight, then showers likely after midnight. waves 2 to
4 feet. 
.sunday...southwest winds 15 to 25 knots. a chance of showers.
waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.monday...southwest winds 15 to 25 knots veering northwest. a
chance of showers. waves subsiding to 1 to 3 feet, then building
to 3 to 5 feet occasionally to 7 feet. 

$$
fzus63 kmqt 190143
glfls 

lsz266-190945-
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-
943 pm edt wed oct 18 2017

.rest of tonight...west winds 20 to 30 knots. waves 5 to 8 feet
occasionally to 10 feet building to 7 to 10 feet occasionally to
13 feet. 
.thursday...west winds 20 to 30 knots with gale force gusts to 35
knots diminishing to 15 to 25 knots. waves building to 8 to 11 
feet occasionally to 14 feet, then subsiding to 5 to 8 feet 
occasionally to 10 feet. 
.thursday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight, then backing south late. waves
subsiding to 1 to 3 feet. 
.friday...south winds 15 to 25 knots. waves building to 2 to
4 feet. 
.friday night...south winds 15 to 25 knots. waves building to
3 to 5 feet occasionally to 7 feet. 
.saturday...south winds 15 to 25 knots. a chance of showers.
waves building to 3 to 6 feet occasionally to 8 feet. 
.saturday night...south winds 20 to 30 knots. a chance of showers
through midnight, then showers likely after midnight. waves
subsiding to 3 to 5 feet occasionally to 7 feet. 
.sunday...southwest winds 15 to 25 knots backing south. showers
likely. waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet. 
.monday...south winds 15 to 25 knots veering northwest. a chance
of showers. waves subsiding to 2 to 4 feet, then building to 3 to
6 feet occasionally to 8 feet. 

$$

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