Great Lakes Forecast
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000
FZUS63 KLOT 201448
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
848 AM CST Sat Jan 20 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...A trough of low pressure of 29.6 inches over the
South High Plains will will deepen to 29.4 inches as it moves to
northern Lake Michigan Monday night, then continues northeast
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.

LMZ261-362-364-366-563-565-202245-
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-
848 AM CST Sat Jan 20 2018

TWO RIVERS WI TO MANISTEE MI NORTH...

...GALE WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY
EVENING...

.REST OF TODAY...West winds 10 to 20 kt diminishing to 5 to
10 kt. Waves 2 to 4 ft.
.TONIGHT...Southwest winds 5 to 10 kt becoming south. Waves 1 to
3 ft.
.SUNDAY...Southeast winds 10 to 15 kt backing to northeast 10 to
20 kt. Waves 1 to 3 ft.
.SUNDAY NIGHT...Northeast winds 15 to 25 kt becoming east gales to
35 kt by morning. Chance of snow and rain overnight. Waves 3 to 5
ft building to 4 to 7 ft occasionally to 9 ft.
.MONDAY...East gales to 40 kt. Snow and rain. Waves 8 to 11 ft
occasionally to 14 ft.
.MONDAY NIGHT...East gales to 40 kt becoming northeast gales to
35 kt. Snow, rain and light sleet. Waves 8 to 11 ft occasionally
to 14 ft subsiding to 6 to 9 ft occasionally to 12 ft.
.TUESDAY...North gales to 35 kt. Snow likely. Waves 6 to 9 ft
occasionally to 12 ft.
.WEDNESDAY...North winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 3 to 5 ft subsiding to 1 to 3 ft.

$$

LMZ567-669-671-673-868-870-872-874-202245-
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 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-
848 AM CST Sat Jan 20 2018

TWO RIVERS WI TO MANISTEE MI SOUTH TO WIND POINT WI TO HOLLAND
MI...

.REST OF TODAY...West winds 10 to 20 kt becoming southwest 10 to
15 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.TONIGHT...South winds 10 to 15 kt. Waves 1 to 3 ft.
.SUNDAY...South winds 10 to 15 kt backing to east 10 to 20 kt.
Chance of rain with areas of drizzle in the afternoon. Waves 1 to
3 ft.
.SUNDAY NIGHT...East winds 10 to 20 kt increasing to 30 kt
overnight. Chance of rain in the evening...then rain likely
overnight. Waves 1 to 3 ft building to 3 to 5 ft.
.MONDAY...East winds to 30 kt becoming southeast. Rain. Waves 5
to 8 ft occasionally to 10 ft.
.MONDAY NIGHT...Southeast winds 10 to 20 kt veering to northwest
gales to 35 kt overnight. Rain likely. Waves 4 to 6 ft
occasionally to 8 ft building to 5 to 8 ft occasionally to 10 ft.
.TUESDAY...Northwest gales to 40 kt. Chance of snow. Waves 7 to
10 ft occasionally to 13 ft building to 8 to 11 ft occasionally
to 14 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt. Waves 3 to 5 ft
subsiding to 2 to 4 ft.

$$

LMZ080-675-777-779-876-878-202245-
Lake Michigan from Michigan City IN to St. Joseph MI 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 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-
848 AM CST Sat Jan 20 2018

WIND POINT WI TO HOLLAND MI SOUTH...

.REST OF TODAY...Southwest winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.TONIGHT...Southwest winds 10 to 20 kt becoming south 10 to
15 kt. Patchy drizzle overnight. Waves 1 to 3 ft.
.SUNDAY...Southeast winds 10 to 15 kt becoming east 10 to 20 kt.
Chance of rain with areas of drizzle. Waves 1 to 3 ft.
.SUNDAY NIGHT...East winds 10 to 20 kt increasing to 30 kt
overnight. Rain developing. Waves 1 to 3 ft building to 3 to 5
ft.
.MONDAY...Southeast winds to 30 kt becoming south. Areas of fog.
Rain. Waves 4 to 7 ft occasionally to 9 ft.
.MONDAY NIGHT...South winds 15 to 25 kt becoming southwest. Rain
likely. Waves 2 to 4 ft.
.TUESDAY...Northwest gales to 40 kt. Chance of snow and rain
likely. Waves 6 to 9 ft occasionally to 12 ft building to 8 to
11 ft occasionally to 14 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft.

$$
LMZ761-202245-
MAFOR 2016/
MICHIGAN NORTH 12610 11500 14410 11310. Waves 2 to 4 ft today.
Waves 1 to 3 ft tonight and Sunday morning.

MICHIGAN SOUTH 14520 11520 12410 11315. Patchy drizzle after
midnight tonight. Chance of rain with areas of drizzle Sunday
morning. Waves 3 to 5 ft subsiding to 2 to 4 ft today. Waves 1 to
3 ft tonight and Sunday morning.

$$

Experimental modernized open lake forecast is available online at
weather.gov/lot/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes



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