Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 170243
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
843 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...Strong high pressure of 30.7 inches over the central
Plains 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.

LMZ261-362-364-366-563-565-567-868-170900-
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-
843 PM CST Tue Jan 16 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT FROM 6 AM CST WEDNESDAY THROUGH LATE
WEDNESDAY NIGHT...

.REST OF TONIGHT...West winds 10 to 20 kt increasing to 30 kt
overnight. Chance of snow showers this evening. Waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 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.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-170900-
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-
843 PM CST Tue Jan 16 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

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

.REST OF TONIGHT...Northwest winds 15 to 25 kt becoming west.
Chance of snow showers. Waves 4 to 7 ft occasionally to 9 ft.
.WEDNESDAY...West winds to 30 kt becoming southwest gales to 35
kt in the afternoon. Slight chance of snow showers in the
morning. Freezing spray in the afternoon. Waves building to 5 to
8 feet occasionally to 10 ft.
.WEDNESDAY NIGHT...Southwest gales to 35 kt. Freezing spray.
Waves 8 to 12 ft occasionally to 16 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.

$$
LMZ761-170900-
MAFOR 1704/
MICHIGAN NORTH...Gale Warning in effect...11620 11630 11640
11550 14550. Chance of snow showers this evening. Freezing spray
Wednesday. Waves 3 to 5 ft building to 4 to 6 ft occasionally to
8 ft tonight. Waves 5 to 8 ft occasionally to 10 ft building to 8
to 12 ft occasionally to 16 ft Wednesday. Waves 8 to 12 ft
occasionally to 16 ft Wednesday evening.

MICHIGAN SOUTH 11737 11730 11630 12640 13550. Chance of snow
showers tonight. Freezing spray Wednesday afternoon and Wednesday
evening. Waves 4 to 7 ft occasionally to 9 ft tonight. Waves 5 to
8 ft occasionally to 10 ft Wednesday. Waves 8 to 12 ft
occasionally to 16 ft Wednesday evening.

$$

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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