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fzus63 kmkx 301505 cca
glflm 
761 

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
849 am cdt fri oct 30 2020

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... 

high pressure of 30.3 inches over the upper midwest will continue
to move east across the western great lakes and lake michigan 
today into tonight. gusty north to northwest winds this morning 
will become lighter and more variable later today and this 
evening. 

this weekend several periods of strong winds continues to look 
likely across lake michigan, as strong low pressure averaging 
29.4 inches tracks mainly east across south central canada and 
then up towards hudson bay. a trailing cold front will push across
lake michigan saturday night, followed by a stronger cold front 
on sunday. 

gales are likely for saturday and sunday with gusts possibly 
reaching storm force across the northern open waters later 
saturday afternoon and evening, and again sunday afternoon. a gale
watch has been issued for the entire lake, and may be upgraded to
storm conditions in later periods. 

&&

lmz261-362-364-366-563-565-567-868-302130-
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-
849 am cdt fri oct 30 2020

sheboygan wi to pentwater mi north...

...gale watch in effect from saturday morning through sunday
evening...

.rest of today...north winds 10 to 20 kt becoming northwest 5 to
10 kt. isolated rain showers through mid morning. waves 2 to 4 ft
subsiding to 1 to 3 ft. 
.tonight...west winds 5 to 10 kt becoming southwest late in the
evening, then becoming south 10 to 20 kt after midnight
increasing to 15 to 25 kt late. waves 1 to 3 ft building to 3 to
5 ft. 
.saturday...south winds to 30 kt increasing to gales to 45 kt.
waves 4 to 7 ft occasionally to 9 ft building to 14 to 18 ft
occasionally to 23 ft. 
.saturday night...southwest gales to 45 kt becoming west gales to
35 kt overnight. rain showers likely in the evening, then chance
of rain showers overnight. waves 14 to 18 ft occasionally to
23 ft. 
.sunday...northwest gales to 40 kt increasing to gales to 45 kt.
chance of rain showers. waves 8 to 11 ft occasionally to 14 ft
building to 8 to 12 ft occasionally to 16 ft. 
.sunday night...northwest gales to 45 kt diminishing to 15 to
25 kt. waves 8 to 12 ft occasionally to 16 ft subsiding to 5 to
8 ft occasionally to 10 ft. 
.monday...west winds to 30 kt. waves 4 to 6 ft occasionally to
8 ft. 
.tuesday...southwest winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft building to 2 to 4 ft.  

$$
fzus63 kmkx 301505 cca
glflm 

lmz080-669-671-673-675-777-779-870-872-874-876-878-302130-
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-
849 am cdt fri oct 30 2020

sheboygan wi to pentwater mi south...

...gale watch in effect from saturday morning through sunday
evening...

.rest of today...north winds 10 to 20 kt diminishing to 10 to
15 kt. isolated rain showers through mid morning. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft. 
.tonight...northeast winds 5 to 10 kt veering to southeast late
in the evening, then increasing to 10 to 15 kt after midnight
becoming south 10 to 20 kt late. waves 1 to 3 ft. 
.saturday...south winds to 30 kt increasing to gales to 40 kt.
waves 3 to 5 ft building to 10 to 14 ft occasionally to 18 ft. 
.saturday night...south gales to 40 kt becoming west. chance of
rain showers. waves 10 to 14 ft occasionally to 18 ft. 
.sunday...northwest gales to 40 kt. waves 10 to 14 ft
occasionally to 18 ft. 
.sunday night...northwest gales to 40 kt diminishing to 30 kt.
waves 10 to 14 ft occasionally to 18 ft subsiding to 7 to 10 ft
occasionally to 13 ft. 
.monday...west winds 15 to 25 kt. waves 4 to 7 ft occasionally to
9 ft. 
.tuesday...west winds 5 to 10 kt becoming southwest 10 to 20 kt.
waves 1 to 3 ft.  

$$

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