Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 162102
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
302 PM CST Tue Jan 16 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...Low pressure of 30.3 inches centered over the
eastern lakes will weaken tonight. Strong high pressure of 30.9
inches is centered Kansas and will move to the lower Ohio Valley
Wednesday. The high will continue to slowly sag south to the Gulf
coast by Thursday night while weakening to 30.4 inches. The high
will then slowly move to the southeast Atlantic coast by Sunday.
Meanwhile, a series of low pressure systems, averaging 29.7
inches will track across the Upper Great Lakes region over the
next few days.

LMZ261-362-364-366-563-565-567-868-170430-
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-
302 PM CST Tue Jan 16 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WATCH IN EFFECT FROM LATE TONIGHT THROUGH LATE WEDNESDAY
NIGHT...

.TONIGHT...North winds 15 to 25 kt becoming southwest gales to 35
kt late. Chance of snow showers this evening. Waves 4 to 7 ft
occasionally to 9 ft.
.WEDNESDAY...Southwest gales to 35 kt. Freezing spray. Waves 5 to
8 ft occasionally to 10 ft building to 8 to 12 ft occasionally to
16 ft.
.WEDNESDAY NIGHT...Southwest gales to 35 kt becoming west to 30
kt. Waves 8 to 12 ft occasionally to 16 ft subsiding to 6 to 9 ft
occasionally to 12 ft.
.THURSDAY...West winds to 30 kt diminishing to 15 to 25 kt. Waves
5 to 8 ft occasionally to 10 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.THURSDAY NIGHT...West winds 10 to 20 kt becoming southwest.
Waves 4 to 6 ft occasionally to 8 ft.
.FRIDAY...Southwest winds to 30 kt. Waves 4 to 6 ft occasionally
to 8 ft building to 6 to 9 ft occasionally to 12 ft.
.FRIDAY NIGHT...Southwest winds to 30 kt. Waves 7 to 10 ft
occasionally to 13 ft.
.SATURDAY...Southwest winds 10 to 20 kt. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft.
.SUNDAY...Southeast winds 10 to 20 kt becoming east. Chance of
rain and snow. Waves 1 to 3 ft building to 3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-170430-
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-
302 PM CST Tue Jan 16 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH THURSDAY
AFTERNOON...

.TONIGHT...North winds to 30 kt becoming west. Chance of snow
showers. Waves 5 to 8 feet occasionally to 10 feet subsiding to 4
to 7 feet occasionally to 9 feet.
.WEDNESDAY...West winds to 30 kt becoming southwest gales to
35 kt. Slight chance of snow showers in the morning. Freezing
spray in the afternoon. Waves 4 to 7 feet occasionally to 9 feet
building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY NIGHT...Southwest gales to 35 kt. Freezing spray.
Waves 8 to 12 ft occasionally to 16 ft subsiding to 8 to 11 ft
occasionally to 14 ft.
.THURSDAY...Southwest gales to 35 kt diminishing to 30 kt.
Freezing spray in the morning. Waves 7 to 10 ft occasionally to 13
ft.
.THURSDAY NIGHT...Southwest winds to 30 kt diminishing to 15 to
25 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft.
.FRIDAY...Southwest winds to 30 kt. Waves 4 to 6 ft occasionally
to 8 ft building to 5 to 8 ft occasionally to 10 ft.
.FRIDAY NIGHT...Southwest winds to 30 kt. Waves 6 to 9 ft
occasionally to 12 ft.
.SATURDAY...Southwest winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft.
.SUNDAY...South winds 10 to 20 kt. Chance of rain. Waves 2 to
4 ft.

$$

LMZ761-170430-
MAFOR 1622/
MICHIGAN NORTH 11840 11830 11630 11640 12650 12550. Chance of
snow showers this evening. Waves 4 to 7 feet occasionally to 9
feet tonight. Waves 5 to 8 feet occasionally to 10 feet building
to 8 to 12 feet occasionally to 16 feet Wednesday.

MICHIGAN SOUTH 12847 11737 11630 13640 11550. Chance of snow
showers after midnight tonight. Waves 5 to 8 feet occasionally to
10 feet subsiding to 4 to 7 feet occasionally to 9 feet tonight.
Waves 4 to 7 feet occasionally to 9 feet building to 5 to 8 feet
occasionally to 10 feet Wednesday.

$$

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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