fzus63 kmkx 201506
glflm 
expires:202512202230;;919871

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
906 am cst sat dec 20 2025

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 29.3 inches will track across ontario today and
tonight, and the associated cold front will cross lake michigan
this afternoon and early evening. southerly gusts ahead of the
front will periodically exceed gale force today. a brief decrease
in gusts may occur from late morning into the early afternoon as 
a cold front approaches and begins to cross lake michigan. 

west- northwest gusts will quickly increase behind the front late
this afternoon, and a return of widespread gales is anticipated 
across the open waters. the gale warning remains in effect until 
3 am cst. areas of moderate freezing spray are expected this 
evening as arctic air settles in behind the departed front with 
pockets of heavy freezing spray possible.

winds will steadily taper over the open waters sunday morning and 
afternoon as 30.4 inch high pressure settles into the western 
great lakes. said high will move east of lake michigan sunday 
night into monday as 29.8 inch low pressure builds in the 
northern great plains, resulting in a south to southwest wind 
shift. 25-30 knot gusts are possible during the day monday, though
gale potential is low at this time. winds will shift out of the 
west-northwest and weaken tuesday through tuesday night as the 
next area of high pressure moves into the northern great plains.


lmz261-362-364-366-563-565-567-868-202230-
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-
906 am cst sat dec 20 2025

sheboygan wi to pentwater mi north...

...gale warning in effect through late tonight...

.rest of today...southwest gales to 35 kt becoming west gales to
40 kt. chance of snow with areas of light freezing drizzle
through mid morning, then slight chance of snow this afternoon.
waves 10 to 14 ft occasionally to 18 ft subsiding to 8 to 12 ft
occasionally to 16 ft. 
.tonight...west gales to 40 kt becoming northwest gales to 35 kt.
freezing spray. patchy light freezing drizzle. waves 10 to 14 ft 
occasionally to 18 ft subsiding to 7 to 10 ft occasionally to 13 
ft. 
.sunday...northwest winds to 30 kt diminishing to 15 to 25 kt
late in the morning, then becoming west 10 to 20 kt in the
afternoon. freezing spray in the morning. waves 6 to 9 ft
occasionally to 12 ft subsiding to 1 to 3 ft. 
.sunday night...southwest winds 10 to 20 kt increasing to 15 to
25 kt. waves 2 to 4 ft building to 4 to 6 ft occasionally to
8 ft. 
.monday...southwest winds to 30 kt becoming south. chance of snow
in the morning, then snow likely in the afternoon. waves 6 to
9 ft occasionally to 12 ft. 
.monday night...south winds 10 to 20 kt becoming southwest.
chance of rain and snow. waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 6 ft occasionally to 8 ft. 
.tuesday...west winds 10 to 20 kt becoming northwest 15 to 25 kt.
waves 3 to 5 ft subsiding to 2 to 4 ft. 
.wednesday...south winds 10 to 20 kt. waves 3 to 5 ft.  

$$

fzus63 kmkx 201506
glflm 
expires:202512202230;;919872

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
906 am cst sat dec 20 2025

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 29.3 inches will track across ontario today and
tonight, and the associated cold front will cross lake michigan
this afternoon and early evening. southerly gusts ahead of the
front will periodically exceed gale force today. a brief decrease
in gusts may occur from late morning into the early afternoon as 
a cold front approaches and begins to cross lake michigan. 

west- northwest gusts will quickly increase behind the front late
this afternoon, and a return of widespread gales is anticipated 
across the open waters. the gale warning remains in effect until 
3 am cst. areas of moderate freezing spray are expected this 
evening as arctic air settles in behind the departed front with 
pockets of heavy freezing spray possible.

winds will steadily taper over the open waters sunday morning and 
afternoon as 30.4 inch high pressure settles into the western 
great lakes. said high will move east of lake michigan sunday 
night into monday as 29.8 inch low pressure builds in the 
northern great plains, resulting in a south to southwest wind 
shift. 25-30 knot gusts are possible during the day monday, though
gale potential is low at this time. winds will shift out of the 
west-northwest and weaken tuesday through tuesday night as the 
next area of high pressure moves into the northern great plains.


lmz080-669-671-673-675-777-779-870-872-874-876-878-202230-
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-
906 am cst sat dec 20 2025

sheboygan wi to pentwater mi south...

...gale warning in effect through late tonight...

.rest of today...southwest gales to 35 kt becoming west to 30 kt 
early this afternoon, then increasing to gales to 35 kt late. 
slight chance of snow, patchy drizzle and light freezing drizzle 
through mid morning, then slight chance of snow this afternoon. 
waves 10 to 14 ft occasionally to 18 ft subsiding to 8 to 11 ft 
occasionally to 14 ft. 
.tonight...west gales to 40 kt becoming northwest to 30 kt.
freezing spray overnight. waves 10 to 14 ft occasionally to
18 ft. 
.sunday...northwest winds to 30 kt diminishing to 10 to 20 kt
late in the morning, then becoming west early in the afternoon and
diminishing to 10 to 15 kt late. freezing spray in the morning. 
waves 8 to 11 ft occasionally to 14 ft subsiding to 3 to 5 ft. 
.sunday night...southwest winds 10 to 15 kt becoming south 10 to
20 kt. waves 2 to 4 ft building to 4 to 6 ft occasionally to
8 ft. 
.monday...south winds to 30 kt. chance of snow in the morning.
waves 6 to 9 ft occasionally to 12 ft. 
.monday night...south winds 10 to 20 kt becoming southwest. waves
5 to 8 ft occasionally to 10 ft subsiding to 4 to 6 ft
occasionally to 8 ft. 
.tuesday...west winds 10 to 20 kt becoming northwest. waves 3 to
5 ft. 
.wednesday...southeast winds 10 to 20 kt becoming south. waves
3 to 5 ft.  

$$