(1/3)
Latest Great Lakes Marine Forecast by KMKX
Issued 2/20/2026 8:44 AM US/Central.
Valid through 2/20/2026 4:15 PM US/Central.
fzus63 kmkx 201444
glflm
expires:202602202215;;961770
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
844 am cst fri feb 20 2026
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 around 29.2 inches over north central lake michigan
will track to lake huron by late this afternoon. west to northwest
gales will develop over the southern half of lake michigan today
as the strong low departs. a gale warning remains in effect into
this evening.
northwest winds gradually subside late tonight as low pressure
weakens over lake huron. northwest to north winds continue
through the weekend and into early next week as polar high
pressure builds southward towards the dakotas and minnesota.
these winds will become gusty sunday into monday morning as the
polar high draws closer, and could reach gale force sunday night
into monday morning. the high pressure area then moves across
lake michigan monday night with light and variable winds expected.
lmz261-362-364-366-563-565-202215-
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-
844 am cst fri feb 20 2026
two rivers wi to manistee mi north...
.rest of today...east gales to 40 kt becoming northeast to 30 kt
early this afternoon, then becoming north gales to 35 kt late.
rain with freezing rain likely through mid morning, then rain and
snow likely this afternoon. waves 4 to 6 ft occasionally to 8 ft
building to 5 to 8 ft occasionally to 10 ft.
.tonight...northwest gales to 35 kt becoming north 10 to 20 kt.
snow likely with possible rain and freezing rain in the evening,
then chance of snow and slight chance of light freezing rain
overnight. waves 5 to 8 ft occasionally to 10 ft subsiding to
4 to 6 ft occasionally to 8 ft.
.saturday...north winds 10 to 20 kt diminishing to 10 to 15 kt.
snow likely in the morning, then chance of snow in the afternoon.
waves 3 to 5 ft subsiding to 2 to 4 ft.
.saturday night...north winds 10 to 20 kt increasing to 15 to
25 kt. chance of snow. waves 2 to 4 ft building to 4 to 6 ft
occasionally to 8 ft.
.sunday...north winds 15 to 25 kt increasing to 30 kt. chance of
snow in the morning. waves 6 to 9 ft occasionally to 12 ft.
.sunday night...north winds to 30 kt. waves 8 to 11 ft
occasionally to 14 ft.
.monday...north winds to 30 kt diminishing to 15 to 25 kt. waves
8 to 12 ft occasionally to 16 ft subsiding to 6 to 9 ft
occasionally to 12 ft.
.tuesday...south winds to 30 kt. chance of snow. waves 5 to 8 ft
occasionally to 10 ft building to 10 to 14 ft occasionally to
18 ft.
$$
(2/3)
Latest Great Lakes Marine Forecast by KMKX
Issued 2/20/2026 8:44 AM US/Central.
Valid through 2/20/2026 4:15 PM US/Central.
fzus63 kmkx 201444
glflm
expires:202602202215;;961771
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
844 am cst fri feb 20 2026
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 around 29.2 inches over north central lake michigan
will track to lake huron by late this afternoon. west to northwest
gales will develop over the southern half of lake michigan today
as the strong low departs. a gale warning remains in effect into
this evening.
northwest winds gradually subside late tonight as low pressure
weakens over lake huron. northwest to north winds continue
through the weekend and into early next week as polar high
pressure builds southward towards the dakotas and minnesota.
these winds will become gusty sunday into monday morning as the
polar high draws closer, and could reach gale force sunday night
into monday morning. the high pressure area then moves across
lake michigan monday night with light and variable winds expected.
lmz567-669-868-870-202215-
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-
844 am cst fri feb 20 2026
two rivers wi to manistee mi south to port washington wi to
whitehall mi...
...gale warning in effect through this evening...
.rest of today...south winds to 30 kt becoming southwest late
this morning, then becoming west gales to 40 kt this afternoon.
chance of rain through mid morning, then rain likely with slight
chance of snow this afternoon. waves 4 to 6 ft occasionally to
8 ft building to 8 to 12 ft occasionally to 16 ft.
.tonight...northwest gales to 40 kt diminishing to 15 to 25 kt.
chance of snow and rain likely in the evening, then slight chance
of snow overnight. waves 8 to 12 ft occasionally to 16 ft
subsiding to 6 to 9 ft occasionally to 12 ft.
.saturday...northwest winds 10 to 20 kt. waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft.
.saturday night...northwest winds 10 to 20 kt increasing to 15 to
25 kt. chance of snow. waves 3 to 5 ft building to 5 to 8 ft
occasionally to 10 ft.
.sunday...northwest winds to 30 kt. chance of snow. waves 7 to
10 ft occasionally to 13 ft building to 8 to 11 ft occasionally
to 14 ft.
.sunday night...north winds to 30 kt increasing to gales to
35 kt. waves 10 to 14 ft occasionally to 18 ft.
.monday...north gales to 35 kt diminishing to 30 kt. waves 10 to
14 ft occasionally to 18 ft.
.tuesday...south winds to 30 kt. waves 6 to 9 ft occasionally to
12 ft building to 10 to 14 ft occasionally to 18 ft.
$$
(3/3)
Latest Great Lakes Marine Forecast by KMKX
Issued 2/20/2026 8:44 AM US/Central.
Valid through 2/20/2026 4:15 PM US/Central.
fzus63 kmkx 201444
glflm
expires:202602202215;;961772
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
844 am cst fri feb 20 2026
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 around 29.2 inches over north central lake michigan
will track to lake huron by late this afternoon. west to northwest
gales will develop over the southern half of lake michigan today
as the strong low departs. a gale warning remains in effect into
this evening.
northwest winds gradually subside late tonight as low pressure
weakens over lake huron. northwest to north winds continue
through the weekend and into early next week as polar high
pressure builds southward towards the dakotas and minnesota.
these winds will become gusty sunday into monday morning as the
polar high draws closer, and could reach gale force sunday night
into monday morning. the high pressure area then moves across
lake michigan monday night with light and variable winds expected.
lmz080-671-673-675-777-779-872-874-876-878-202215-
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-
844 am cst fri feb 20 2026
port washington wi to whitehall mi south...
...gale warning in effect through this evening...
.rest of today...southwest gales to 40 kt becoming west gales to
45 kt. chance of rain and snow through mid morning, then chance
of snow and rain this afternoon. waves 6 to 9 ft occasionally to
12 ft building to 10 to 14 ft occasionally to 18 ft.
.tonight...west gales to 40 kt becoming northwest 15 to 25 kt.
waves 10 to 14 ft occasionally to 18 ft subsiding to 6 to 9 ft
occasionally to 12 ft.
.saturday...northwest winds 10 to 20 kt. waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft.
.saturday night...northwest winds 10 to 20 kt increasing to 15 to
25 kt. chance of snow overnight. waves 4 to 6 ft occasionally to
8 ft building to 5 to 8 ft occasionally to 10 ft.
.sunday...northwest winds to 30 kt. snow likely in the morning,
then chance of snow in the afternoon. waves 8 to 11 ft
occasionally to 14 ft building to 8 to 12 ft occasionally to
16 ft.
.sunday night...northwest winds to 30 kt becoming north gales to
35 kt. chance of snow. waves 10 to 14 ft occasionally to 18 ft.
.monday...north gales to 35 kt diminishing to 30 kt. chance of
snow. waves 10 to 14 ft occasionally to 18 ft.
.tuesday...southwest winds to 30 kt becoming south. waves 6 to
9 ft occasionally to 12 ft building to 8 to 11 ft occasionally to
14 ft.
$$
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