Great Lakes Forecast
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000
FZUS63 KLOT 122059
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
259 PM CST Fri Jan 12 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 30.7 inches from Alberta into the
northern Plains will move to the Ohio Valley Saturday night then
to the eastern Great Lakes and Quebec on Sunday. A 30.1 inch low
will form over Minnesota Sunday and will move across Lake Michigan
Monday. Another high of 31.1 inches will build into the northern
Great Plains Monday then shift to the mid Mississippi Valley
Wednesday weakening slightly to 30.7 inches.

LMZ261-362-364-366-563-565-567-868-130430-
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-
259 PM CST Fri Jan 12 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.TONIGHT...North gales to 35 kt diminishing to 30 kt. Freezing
spray. Isolated snow showers. Waves 10 to 14 ft occasionally to 18
ft subsiding to 7 to 10 ft occasionally to 13 ft.
.SATURDAY...North winds 15 to 25 kt becoming northwest 10 to
20 kt. Freezing spray in the morning. Isolated snow showers.
Waves subsiding to 3 to 5 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt becoming west.
Waves 2 to 4 ft subsiding to 1 to 2 ft.
.SUNDAY...Southwest winds 15 to 25 kt increasing to 30 kt. Waves
2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.
.SUNDAY NIGHT...South winds to 30 kt. Snow likely. Waves 5 to
8 ft occasionally to 10 ft.
.MONDAY...South winds to 30 kt becoming east 10 to 20 kt in the
afternoon. Snow likely. Waves 4 to 7 ft occasionally to 9 ft
subsiding to 3 to 5 ft.
.MONDAY NIGHT...Northeast winds 15 to 25 kt increasing to 30 kt.
Scattered snow showers. Waves 2 to 4 ft building to 4 to 6 ft
occasionally to 8 ft.
.TUESDAY...Northeast winds to 30 kt becoming north. Scattered
snow showers. Waves 4 to 7 ft occasionally to 9 ft.
.WEDNESDAY...West winds 15 to 25 kt increasing to 30 kt. Waves
3 to 5 ft building to 4 to 7 ft occasionally to 9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-130430-
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-
259 PM CST Fri Jan 12 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.TONIGHT...North gales to 40 kt diminishing to 30 kt. Freezing
spray. Scattered snow showers. Waves 12 to 16 ft occasionally to
21 ft subsiding to 8 to 12 ft occasionally to 16 ft.
.SATURDAY...North winds to 30 kt becoming northwest 10 to 20 kt.
Freezing spray in the morning. Scattered snow showers. Waves 7 to
10 ft occasionally to 13 ft subsiding to 4 to 7 ft occasionally
to 9 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt becoming west 10 to
15 kt. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.SUNDAY...Southwest winds 10 to 20 kt becoming south to 30 kt in
the afternoon. Waves 1 to 3 ft building to 3 to 5 ft.
.SUNDAY NIGHT...South winds to 30 kt. Snow likely in the
evening...then snow overnight. Freezing spray overnight. Waves
5 to 8 ft occasionally to 10 ft.
.MONDAY...Southwest winds to 30 kt becoming west 15 to 25 kt.
Snow likely in the morning...then chance of snow in the
afternoon. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to
5 ft.
.MONDAY NIGHT...Northwest winds to 30 kt. Freezing spray.
Scattered snow showers. Waves 4 to 7 ft occasionally to 9 ft.
.TUESDAY...North winds to 30 kt. Snow showers likely. Waves 4 to
7 ft occasionally to 9 ft.
.WEDNESDAY...West winds 10 to 20 kt increasing to 30 kt in the
afternoon. Scattered snow showers. Waves 3 to 5 ft.

$$

LMZ761-130430-
MAFOR 1222/
MICHIGAN NORTH...Gale Warning in effect...13850 12840 11830 11730
11720. Waves 10 to 14 feet occasionally to 18 feet subsiding to 7
to 10 feet occasionally to 13 feet tonight. Waves subsiding to 3
to 5 feet Saturday.

MICHIGAN SOUTH...Gale Warning in effect...11857 12850 12840 11830
11730 11720. Scattered snow showers. Waves 12 to 16 feet
occasionally to 21 feet subsiding to 8 to 12 feet occasionally to
16 feet tonight. Waves 7 to 10 feet occasionally to 13 feet
subsiding to 4 to 7 feet occasionally to 9 feet Saturday.

$$


Rodriguez

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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