fzus63 kmkx 111850
glflm 
expires:202609120315;;286063

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
150 pm cdt fri sep 11 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...

30.0 inch high pressure is shifting into southern ontario this 
afternoon, allowing winds to shift generally southerly across the 
open waters of lake michigan. southerly winds will continue to 
increase into tonight as 29.4 inch low pressure moves from the 
northern great plains toward the us-canadian border. winds will 
shift out of the west-northwest during the day saturday as a cold 
front moves across the lake. expecting wind gusts to remain 
primarily in the 25-30 knot range from this evening through 
saturday, though occasional gusts approaching gale thresholds 
can't be completely ruled out. currently anticipating any such 
gusts to remain brief and isolated enough to preclude the need for
gale warnings, but will continue to monitor trends. isolated 
showers and thunderstorms are possible ahead of the approaching 
cold front, with severe weather hazards not expected.

30.2 inch high pressure will build in from the northern great 
plains sunday night into monday, bringing decreasing winds 
saturday night through sunday & light/variable winds sunday night 
into monday. the high will move east of the waters monday 
afternoon & evening, resulting in a south-southeast wind shift. 
winds will increase further & veer south-southwesterly monday 
night into tuesday as 29.4 inch low pressure develops over 
manitoba. gales continue to appear likely during this time frame, 
with headlines becoming necessary in later forecasts if trends 
continue to hold. periods of showers and thunderstorms will 
accompany the developing low from as early as monday evening 
through at least tuesday afternoon. widespread severe weather 
hazards appear low over lake michigan at this time, though an 
isolated stronger storm with gusty winds can't be entirely ruled 
out. winds will trend northerly behind a cold front tuesday night 
into wednesday, steadily tapering away from gale thresholds in the
process. 


lmz261-362-364-366-563-565-567-868-120315-
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-
150 pm cdt fri sep 11 2026

sheboygan wi to pentwater mi north...

.tonight...south winds to 30 kt diminishing to 15 to 25 kt. waves
4 to 7 ft occasionally to 9 ft. 
.saturday...south winds to 30 kt becoming southwest. slight
chance of showers in the morning, then chance of showers and
slight chance of thunderstorms in the afternoon. waves 4 to 7 ft
occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.saturday night...west winds 10 to 20 kt becoming northwest.
waves 2 to 4 ft. 
.sunday...northwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft. 
.sunday night...north winds 10 to 20 kt becoming northeast 10 to
15 kt. waves 1 to 3 ft. 
.monday...east winds 15 to 25 kt becoming southeast gales to
35 kt in the afternoon. waves 4 to 6 ft occasionally to 8 ft
building to 6 to 9 ft occasionally to 12 ft. 
.monday night...south gales to 35 kt. showers. waves 10 to 14 ft 
occasionally to 18 ft. 
.tuesday...southwest gales to 35 kt becoming west gales to 35 kt.
chance of showers. waves 10 to 14 ft occasionally to 18 ft 
subsiding to 5 to 8 ft occasionally to 10 ft. 
.wednesday...northeast winds 10 to 20 kt. waves 1 to 3 ft.  

$$

fzus63 kmkx 111850
glflm 
expires:202609120315;;286064

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
150 pm cdt fri sep 11 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...

30.0 inch high pressure is shifting into southern ontario this 
afternoon, allowing winds to shift generally southerly across the 
open waters of lake michigan. southerly winds will continue to 
increase into tonight as 29.4 inch low pressure moves from the 
northern great plains toward the us-canadian border. winds will 
shift out of the west-northwest during the day saturday as a cold 
front moves across the lake. expecting wind gusts to remain 
primarily in the 25-30 knot range from this evening through 
saturday, though occasional gusts approaching gale thresholds 
can't be completely ruled out. currently anticipating any such 
gusts to remain brief and isolated enough to preclude the need for
gale warnings, but will continue to monitor trends. isolated 
showers and thunderstorms are possible ahead of the approaching 
cold front, with severe weather hazards not expected.

30.2 inch high pressure will build in from the northern great 
plains sunday night into monday, bringing decreasing winds 
saturday night through sunday & light/variable winds sunday night 
into monday. the high will move east of the waters monday 
afternoon & evening, resulting in a south-southeast wind shift. 
winds will increase further & veer south-southwesterly monday 
night into tuesday as 29.4 inch low pressure develops over 
manitoba. gales continue to appear likely during this time frame, 
with headlines becoming necessary in later forecasts if trends 
continue to hold. periods of showers and thunderstorms will 
accompany the developing low from as early as monday evening 
through at least tuesday afternoon. widespread severe weather 
hazards appear low over lake michigan at this time, though an 
isolated stronger storm with gusty winds can't be entirely ruled 
out. winds will trend northerly behind a cold front tuesday night 
into wednesday, steadily tapering away from gale thresholds in the
process. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-120315-
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-
150 pm cdt fri sep 11 2026

sheboygan wi to pentwater mi south...

.tonight...southeast winds 15 to 25 kt becoming south. waves 3 to
5 ft. 
.saturday...south winds 15 to 25 kt becoming southwest 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft. 
.saturday night...west winds 10 to 20 kt veering to north. waves
3 to 5 ft. 
.sunday...north winds 10 to 20 kt. waves 3 to 5 ft. 
.sunday night...north winds 10 to 20 kt becoming northeast. waves
2 to 4 ft. 
.monday...east winds to 30 kt becoming southeast gales to 35 kt 
in the afternoon. waves 4 to 7 ft occasionally to 9 ft building to
7 to 10 ft occasionally to 13 ft. 
.monday night...southeast gales to 35 kt becoming south. chance 
of showers. waves 10 to 14 ft occasionally to 18 ft. 
.tuesday...southwest gales to 35 kt becoming west to 30 kt.
showers likely. waves 10 to 14 ft occasionally to 18 ft subsiding
to 5 to 8 ft occasionally to 10 ft. 
.wednesday...northeast winds 10 to 20 kt. chance of showers.
waves 2 to 4 ft.  

$$