Great Lakes Forecast
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000
FZUS63 KLOT 200134
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
834 PM CDT Sat May 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...30.3 inch high pressure will build across the northern
Great Lakes through Sunday, then expand across the entire Great
Lakes Region through Tuesday. Meanwhile, a 29.9 inch low pressure
trough across the southern Great Lakes tonight will drift
southward to the Ohio River Valley by Monday. The high pressure
will shift to the eastern Great Lakes by Thursday as a 29.7 inch
low pressure forms over the northern and central high Plains.

LMZ261-362-364-366-563-565-567-868-200930-
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-
834 PM CDT Sat May 19 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...North winds 15 to 25 kt. Waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft.
.SUNDAY...North winds 10 to 20 kt. Waves 4 to 6 ft occasionally
to 8 ft subsiding to 3 to 5 ft.
.SUNDAY NIGHT...North winds 10 to 20 kt becoming northeast 10 to
15 kt late in the evening, then becoming east after midnight
becoming east 5 to 10 kt late. Waves 1 to 3 ft subsiding to 1 to
2 ft.
.MONDAY...East winds 5 to 10 kt backing to north. Waves 1 to
2 ft.
.MONDAY NIGHT...North winds 5 to 10 kt veering to east. Waves
1 ft or less.
.TUESDAY...Northeast winds 5 to 10 kt backing to west. Waves
nearly calm.
.TUESDAY NIGHT...Southwest winds 5 to 10 kt. Waves 1 to 2 ft.
.WEDNESDAY...Southwest winds 5 to 10 kt. Waves 1 ft or less.
.THURSDAY...South winds 10 to 15 kt. Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-200930-
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-
834 PM CDT Sat May 19 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Northeast winds 10 to 20 kt becoming north
15 to 25 kt. Patchy fog this evening. Chance of rain showers and
slight chance of thunderstorms overnight. Waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft.
.SUNDAY...North winds 10 to 20 kt. Chance of rain showers in the
morning, then slight chance of rain showers and thunderstorms in
the afternoon. Waves 4 to 6 ft occasionally to 8 ft subsiding to
3 to 5 ft.
.SUNDAY NIGHT...North winds 10 to 20 kt becoming east. Chance of
rain showers overnight. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.MONDAY...East winds 10 to 20 kt. Chance of rain showers. Waves
1 to 3 ft.
.MONDAY NIGHT...Northeast winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 3 ft.
.TUESDAY...North winds 5 to 10 kt. Waves 1 ft or less.
.TUESDAY NIGHT...Southeast winds 5 to 10 kt becoming south. Waves
nearly calm.
.WEDNESDAY...South winds 5 to 10 kt backing to east. Waves nearly
calm.
.THURSDAY...Southeast winds 10 to 15 kt becoming south. Waves
1 to 2 ft.

$$
LMZ761-200930-
MAFOR 2003/
MICHIGAN NORTH 13830 14820 11820. Waves 3 to 5 ft building to 4
to 6 ft occasionally to 8 ft overnight. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft Sunday. Waves 1 to 3
ft Sunday evening.


MICHIGAN SOUTH 11130 12830 11826 14820. Chance of showers late
this evening. Waves 3 to 5 ft building to 4 to 6 ft occasionally
to 8 ft overnight. Waves 4 to 6 ft occasionally to 8 ft subsiding
to 3 to 5 ft Sunday. Waves 3 to 5 ft Sunday evening.

$$


JEE

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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