Great Lakes Forecast
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FZUS63 KLOT 221952
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
252 PM CDT Sun Apr 22 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...Expansive high pressure of 30.5 inches over the
eastern Great Lakes will drift to offshore of the Northeast by
Monday evening. Meanwhile, low pressure of 29.8 inches across the
Lower Mississippi Valley will gradually weaken as it drifts
northeast through Monday. Low pressure passing well to the north
over Hudson Bay will usher a cold front across the lake Tuesday.
Weakening high pressure of 30.2 inches will then move over the
lake on Wednesday night. This will be followed by low pressure
moving from the Canadian Prairies to the Great Lakes late in the
week.

LMZ261-362-364-366-563-565-567-868-230330-
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-
252 PM CDT Sun Apr 22 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Variable winds less than 10 kt becoming east 10 to 15
kt...then becoming southeast. Waves 1 to 2 ft.
.MONDAY...Southeast winds 5 to 10 kt backing to northeast 10 to
15 kt. Waves 1 to 3 ft.
.MONDAY NIGHT...Northeast winds 10 to 15 kt becoming east. Waves
1 to 3 ft subsiding to 1 to 2 ft.
.TUESDAY...Northeast winds less than 10 kt becoming north 10 to
20 kt in the afternoon. Waves 1 to 2 ft.
.TUESDAY NIGHT...North winds to 30 kt. Waves 3 to 5 ft building
to 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY...North winds to 30 kt diminishing to 10 to 20 kt in
the afternoon. Waves 4 to 7 ft occasionally to 9 ft.
.WEDNESDAY NIGHT...West winds 5 to 10 kt becoming southwest.
Waves 1 to 3 ft subsiding to 1 to 2 ft.
.THURSDAY...Southwest winds 10 to 20 kt becoming south. Waves
2 to 4 ft.
.FRIDAY...North winds 15 to 25 kt. Waves 4 to 6 ft occasionally
to 8 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-230330-
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-
252 PM CDT Sun Apr 22 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Northeast winds 10 to 20 kt diminishing to 10 to 15
kt. Waves 1 to 3 ft.
.MONDAY...Northeast winds 10 to 15 kt becoming north 10 to 20 kt.
Waves 1 to 3 ft.
.MONDAY NIGHT...Northeast winds 10 to 20 kt becoming east 10 to
15 kt late in the evening, then diminishing to 5 to 10 kt after
midnight becoming east 5 to 10 kt late. Waves 1 to 3 ft.
.TUESDAY...Northeast winds 5 to 10 kt becoming north. Chance of
rain in the morning. Waves 1 to 2 ft.
.TUESDAY NIGHT...North winds to 30 kt. Waves 3 to 5 ft building
to 4 to 7 ft occasionally to 9 ft.
.WEDNESDAY...North winds to 30 kt diminishing to 15 to 25 kt.
Waves 4 to 7 ft occasionally to 9 ft.
.WEDNESDAY NIGHT...North winds 10 to 20 kt becoming west 5 to
10 kt overnight. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.THURSDAY...Southwest winds 10 to 20 kt becoming south. Waves
1 to 3 ft.
.FRIDAY...North winds 15 to 25 kt. Chance of rain. Waves 4 to
7 ft occasionally to 9 ft.

$$

LMZ761-230330-
MAFOR 2221/
MICHIGAN NORTH 11900 12200 12310 11300 11200 11110. Waves 1 to 3
ft.

MICHIGAN SOUTH 11120 11110 12210 13110 11820. Waves 1 to 3 ft
tonight.

$$


Rodriguez

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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