Great Lakes Forecast
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331
FZUS63 KLOT 200139
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
839 PM CDT Thu Apr 19 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...High pressure of 30.6 inches over the western Great
Lakes will drift very slowly east across the central and eastern
Lakes through Sunday. The high then will move across southern New
England by Monday morning, while low pressure of 29.7 inches
tracks across northern Manitoba and Ontario, reaching James Bay by
Monday night. A cold front trailing from this low will move
across the western Lakes during the middle of next week.

LMZ261-362-364-366-563-565-567-868-200915-
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-
839 PM CDT Thu Apr 19 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Northwest winds 10 to 20 kt diminishing to
less than 10 kt. Waves 1 to 3 ft.
.FRIDAY...West winds 5 to 10 kt becoming southwest. Waves 1 to 3
ft.
.FRIDAY NIGHT...Southwest winds 5 to 10 kt becoming south. Waves
1 to 2 ft.
.SATURDAY...South winds 5 to 10 kt becoming southwest. Waves 1 to
2 ft.
.SATURDAY NIGHT...South winds 5 to 10 kt becoming southeast.
Waves 1 to 2 ft.
.SUNDAY...Southeast winds 5 to 10 kt becoming northeast. Waves 1
to 2 ft.
.SUNDAY NIGHT...East winds 5 to 10 kt becoming south. Waves 1 to
2 ft.
.MONDAY...South winds 10 to 15 kt becoming southwest. Waves 1 to
3 ft.
.TUESDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-200915-
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-
839 PM CDT Thu Apr 19 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Northwest winds 10 to 20 kt becoming north
less than 10 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding
to 2 to 4 ft.
.FRIDAY...Northwest winds less than 10 kt becoming variable at
5 to 10 kt. Waves subsiding to 1 to 3 ft.
.FRIDAY NIGHT...East winds 5 to 10 kt. Waves 1 to 2 ft.
.SATURDAY...East winds 5 to 10 kt becoming northeast. Waves 1 to
2 ft.
.SATURDAY NIGHT...Northeast winds 5 to 10 kt becoming east. Waves
1 to 2 ft.
.SUNDAY...East winds 5 to 10 kt becoming northeast 10 to 15 kt.
Waves 1 to 3 ft.
.SUNDAY NIGHT...Northeast winds 10 to 15 kt becoming east. Waves
1 to 3 ft.
.MONDAY...East winds 10 to 15 kt becoming northeast 5 to 10 kt.
Waves 1 to 3 ft.
.TUESDAY...Southeast winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.

$$
LMZ761-200915-
MAFOR 2003/
MICHIGAN NORTH 11810 11800 11700 11600 11500 12510 11500. Waves 1
to 3 ft.

MICHIGAN SOUTH 11720 12800 12700 11600 11700 11200. Waves 4 to 6
ft occasionally to 8 ft subsiding to 2 to 4 ft overnight. Waves
subsiding to 1 to 3 ft Friday.

$$

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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