Great Lakes Forecast
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000
FZUS63 KLOT 140749
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
249 AM CDT Fri Jul 14 2017

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 of 29.9 inches over Lake Ontario will
move slowly east today with a trailing cold front clearing the
southern part of the lake soon after daybreak. High pressure of
30.2 inches will expand from the Upper Mississippi Valley over the
southern Great Lakes tonight and Saturday morning before shifting
south. Low pressure of 29.9 inches will move from western Ontario
Saturday morning to the eastern Great Lakes by midday Sunday,
steering a cold front southward across the lake Saturday night.
High pressure of 30.1 inches will then build over the lake by
Sunday evening.

LMZ261-362-364-366-563-565-567-868-141530-
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-
249 AM CDT Fri Jul 14 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Northwest winds 10 to 20 kt diminishing to 10 to 15 kt
late in the day. Patchy fog this morning. Slight chance of
showers this morning. Waves 2 to 4 ft subsiding to 1 to 3 ft late
in the day.
.TONIGHT...Northwest winds 10 to 15 kt becoming southwest after
midnight. Waves 1 to 2 ft.
.SATURDAY...Southwest winds 10 to 15 kt increasing to 15 to
25 kt by early afternoon. Waves 1 to 3 ft building to 3 to 5 ft
late in the day.
.SATURDAY NIGHT...Southwest winds 10 to 20 kt veering to north 15
to 20 kt during the late evening. Chance of showers and
thunderstorms in the evening, some which may be gusty. 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 10 to
15 kt. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.MONDAY...Northeast winds 5 to 10 kt backing to southwest. Waves
1 to 3 ft.
.TUESDAY...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-141530-
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-
249 AM CDT Fri Jul 14 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...North winds 10 to 15 kt increasing to 10 to 20 kt after
daybreak. Areas of fog early this morning. Waves 2 to 4 ft.
.TONIGHT...North winds 10 to 20 kt becoming northwest 10 to 15 kt
after midnight. Waves 2 to 4 ft subsiding to 1 to 3 ft after
midnight.
.SATURDAY...Northwest winds 10 to 15 kt becoming west 5 to 10 kt
late in the morning, then becoming southwest 10 to 15 kt early in
the afternoon and increasing to 10 to 20 kt late. Waves 1 to 3
ft.
.SATURDAY NIGHT...Southwest winds 10 to 20 kt veering northwest
late. A slight chance of showers and thunderstorms overnight.
Waves 2 to 4 ft.
.SUNDAY...North winds 10 to 20 kt increasing to 15 to 25 kt late
in the morning. Waves 3 to 5 ft building to 4 to 6 ft
occasionally to 8 ft by early afternoon.
.SUNDAY NIGHT...North winds 15 to 25 kt becoming northeast 10 to
20 kt after midnight. Waves subsiding to 3 to 5 ft overnight.
.MONDAY...Northeast winds 10 to 15 kt becoming north. Waves 2 to
4 ft subsiding to 1 to 3 ft.
.TUESDAY...South winds 10 to 20 kt. Waves 1 to 3 ft.

$$

LMZ761-141530-
MAFOR 1409/
MICHIGAN NORTH 14720 13710 11510. Waves 2 to 4 ft subsiding to 1
to 3 ft late in the day.

MICHIGAN SOUTH 11813 11823 14820 11820 11710. Waves 2 to 4 ft
through this evening, subsiding to 1 to 3 ft after midnight.

$$

MTF

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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