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fzus63 klot 212031
glflm 
408 

open lake forecast for lake michigan
national weather service chicago/romeoville il
231 pm cst sun jan 21 2018

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 29.6 inches over kansas will deepen to 
29.4 inches and cross lake michigan monday night, then continue 
across southern quebec tuesday evening. a broad ridge of high 
pressure of 30.3 inches over the plains tuesday night will move 
across the western great lakes wednesday. another low of 29.4 inches 
will develop in lee of the rockies friday. this low will reach lake 
superior saturday.

lmz261-362-364-366-563-565-220445-
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-
231 pm cst sun jan 21 2018

two rivers wi to manistee mi north...

...gale warning in effect from monday morning through tuesday
afternoon...

.tonight...northeast winds 10 to 20 kt increasing to 30 kt late.
slight chance of rain showers and light freezing rain this
evening...then chance of rain showers and slight chance of snow
showers overnight. waves 1 to 2 ft building to 4 to 6 ft
occasionally to 8 ft. 
.monday...east winds to 30 kt increasing to gales to 40 kt. rain 
or snow showers. waves 5 to 8 ft occasionally to 10 ft building 
to 8 to 12 ft occasionally to 16 ft. 
.monday night...northeast winds to 30 kt increasing to gales to 
40 kt. rain and snow showers in the evening...then snow likely 
overnight. waves 8 to 12 ft occasionally to 16 ft subsiding to 7 
to 10 ft occasionally to 13 ft after midnight.
.tuesday...north gales to 40 kt. chance of snow in the morning.
waves 8 to 12 ft occasionally to 16 ft subsiding to 8 to 11 ft
occasionally to 14 ft in the afternoon. 
.tuesday night...north winds to 30 kt diminishing to 10 to 20 kt
overnight. waves 5 to 8 ft occasionally to 10 ft subsiding to
4 to 6 ft occasionally to 8 ft overnight. 
.wednesday...north winds 10 to 15 kt. waves 2 to 4 ft subsiding
to 1 to 3 ft in the afternoon. 
.wednesday night...northeast winds 10 to 15 kt veering to south
5 to 10 kt. chance of snow. waves 1 to 2 ft. 
.thursday...south winds 10 to 15 kt. waves 1 to 2 ft.
.friday...south winds to 30 kt. waves 6 to 9 ft occasionally to
12 ft.  

$$
fzus63 klot 212031
glflm 

lmz080-567-669-671-673-675-777-779-868-870-872-874-876-878-220445-
lake michigan from michigan city in to st. joseph mi 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 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 pentwater to manistee mi 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-
231 pm cst sun jan 21 2018

two rivers wi to manistee mi south...

...gale watch in effect from late monday night through tuesday
afternoon...

.tonight...east winds 15 to 25 kt. areas of fog. chance of rain
showers and slight chance of light freezing rain this evening...
then rain showers with isolated thunderstorms overnight. waves
1 to 3 ft building to 4 to 6 ft occasionally to 8 ft. 
.monday...southeast winds to 30 kt. areas of fog. showers and 
scattered thunderstorms in the morning...then showers in the 
afternoon. waves 4 to 7 ft occasionally to 9 ft building to 6 to 9
ft occasionally to 12 ft from late morning on. 
.monday night...southeast winds 15 to 25 kt veering to southwest 
winds to 30 kt after midnight...then becoming northwest gales to 
40 kt late. rain likely in the evening...then snow or rain 
overnight. waves 6 to 9 ft occasionally to 12 ft building to 8 to 
11 ft occasionally to 14 ft late. 
.tuesday...northwest gales to 40 kt. snow likely in the morning...
then chance of snow in the afternoon. waves 8 to 12 ft
occasionally to 16 ft. 
.tuesday night...northwest winds to 30 kt diminishing to 10 to
20 kt overnight. waves 7 to 10 ft occasionally to 13 ft subsiding
to 4 to 7 ft occasionally to 9 ft overnight. 
.wednesday...northwest winds 10 to 20 kt. waves 3 to 5 ft
subsiding to 2 to 4 ft in the afternoon. 
.wednesday night...northwest winds 10 to 15 kt becoming west 5 to
10 kt. waves 1 to 3 ft. 
.thursday...south winds 10 to 20 kt. waves 1 to 3 ft.
.friday...south winds to 30 kt. waves 6 to 9 ft occasionally to
12 ft.  

$$

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