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National Weather Service Marine Forecast FZUS63 KLOT

FZUS63 KLOT 190757
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
257 AM CDT Thu Jul 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
High pressure of 30.1 inches across the Great Lakes
will move to New England today. Low pressure of 29.7 inches over
the northern Plains will deepen to 29.5 inches as it slowly tracks
to the Upper Mississippi Valley tonight. This low will reach
southern Lake Michigan by Friday evening, then slowly move
southeast to the Ohio Valley through the weekend.

LMZ261-362-364-366-563-565-567-868-191530-
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-
257 AM CDT Thu Jul 19 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

TODAY
South winds 5 to 10 kt increasing to 10 to 15 kt, then
becoming southeast 10 to 20 kt in the afternoon. Waves 1 to 3 ft.

TONIGHT
East winds 10 to 20 kt becoming southeast 15 to 25 kt.
Slight chance of showers in the evening, then chance of showers
and slight chance of thunderstorms overnight. Waves 2 to 4 ft
building to 4 to 7 ft occasionally to 9 ft.

FRIDAY
Southeast winds 15 to 25 kt becoming northeast 10 to
20 kt. Chance of showers. Waves 5 to 8 ft occasionally to 10 ft
subsiding to 3 to 5 ft.

FRIDAY NIGHT
Northeast winds 10 to 20 kt. Scattered showers.
Waves 3 to 5 ft.

SATURDAY
Northeast winds 15 to 25 kt increasing to 30 kt. A few
gale force gusts. Scattered showers. Waves building to 4 to 7 ft
occasionally to 9 ft.

SATURDAY NIGHT
Northeast winds to 30 kt diminishing to 15 to
25 kt. Chance of showers. Waves 4 to 6 ft occasionally to 8 ft.

SUNDAY
Northeast winds 10 to 20 kt. Waves 2 to 4 ft.

MONDAY
North winds 5 to 10 kt becoming northwest. Waves 1 to
2 ft. 



LMZ080-669-671-673-675-777-779-870-872-874-876-878-191530-
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-
257 AM CDT Thu Jul 19 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

TODAY
Southeast winds 5 to 10 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft building to 2 to 4 ft late.

TONIGHT
Southeast winds 10 to 20 kt increasing to 30 kt.
Chance of showers and slight chance of thunderstorms in the
evening, then showers likely with a chance of thunderstorms
overnight. Waves 2 to 4 ft building to 5 to 8 ft occasionally to
10 ft.

FRIDAY
Southeast winds 15 to 25 kt diminishing to 10 to 20 kt.
Intermittent showers with a chance of thunderstorms. Waves 5 to
8 ft occasionally to 10 ft subsiding to 3 to 5 ft.

FRIDAY NIGHT
Northeast winds 10 to 20 kt becoming north 15 to
25 kt. Intermittent showers and thunderstorms likely. Chance of
waterspouts overnight. Waves 3 to 5 ft.

SATURDAY
North winds 15 to 25 kt increasing to 30 kt. A few
gale force gusts. Chance of waterspouts in the morning.
Intermittent showers with a chance of thunderstorms in the
morning, then scattered showers in the afternoon. Waves building
to 5 to 8 ft occasionally to 10 ft.

SATURDAY NIGHT
North winds to 30 kt becoming northeast 15 to
25 kt. Chance of waterspouts. Chance of showers and
thunderstorms. Waves subsiding to 4 to 7 ft occasionally to 9 ft.

SUNDAY
Northeast winds 10 to 20 kt. Chance of waterspouts.
Waves subsiding to 3 to 5 ft.

MONDAY
Northeast winds 10 to 15 kt becoming north. Waves 1 to
3 ft. 



LMZ761-191530-
MAFOR 1909/
MICHIGAN NORTH 11400 13410 11320 11220 11320 11330. Chance of
showers late this evening. Waves 1 to 3 ft today. Waves 2 to 4 ft
building to 4 to 7 ft occasionally to 9 ft tonight.

MICHIGAN SOUTH 11300 13310 12320 11330 11346. Chance of showers
late, then chance of thunderstorms late this evening. Waves 1 to
3 ft building to 2 to 4 ft today. Waves 2 to 4 ft building to 5
to 8 ft occasionally to 10 ft tonight.



Rodriguez

Experimental modernized open lake forecast is available online at
weather.gov/lot/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes