Great Lakes Forecast
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FZUS63 KLOT 231945
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
245 PM CDT Sun Jul 23 2017

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 29.8 inches over the eastern Great Lakes will move
east to New England Monday. A weak cold front trailing west from
this low will move across the lake tonight with high pressure of
30.2 inches building into the western Great Lakes Monday in the wake
of this front. This high will slowly move east, reaching New England
by Wednesday morning. Meanwhile, a 29.5 inch low will track from
Alberta Monday night to Hudson Bay by Wednesday morning. A cold
front extending south from this low will move across the lake
Wednesday night.

LMZ261-362-364-366-563-565-567-868-240315-
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-
245 PM CDT Sun Jul 23 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Northwest winds 10 to 20 kt becoming northeast.
Isolated showers this evening. Waves 2 to 4 ft.
.MONDAY...Northeast winds 10 to 20 kt becoming north. Waves 3 to
5 ft.
.MONDAY NIGHT...North winds 10 to 20 kt veering to southeast
10 to 15 kt. Waves 1 to 3 ft subsiding to 1 to 2 ft.
.TUESDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.TUESDAY NIGHT...South winds 10 to 20 kt increasing to 15 to
25 kt. Waves 2 to 4 ft.
.WEDNESDAY...Southwest winds 15 to 25 kt. Showers and
thunderstorms, mainly likely in the afternoon. Waves 3 to 5 ft.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 kt veering to north
10 to 15 kt. Chance of showers and thunderstorms. Waves 3 to 5 ft
subsiding to 1 to 3 ft.
.THURSDAY...North winds 10 to 20 kt increasing to 15 to 25 kt.
Waves building to 3 to 5 ft.
.FRIDAY...Northeast winds 10 to 20 kt. Waves 2 to 4 ft.


$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-240315-
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-
245 PM CDT Sun Jul 23 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...West winds around 10 kt becoming north and increasing
to 10 to 20 kt. Waves 1 to 2 ft building to 2 to 4 ft.
.MONDAY...North winds 10 to 20 kt. Waves 3 to 5 ft.
.MONDAY NIGHT...Northeast winds 10 to 20 kt veering to southeast.
Waves 2 to 4 ft subsiding to 1 to 3 ft.
.TUESDAY...Southeast winds 10 to 20 kt. Waves 1 to 3 ft.
.TUESDAY NIGHT...Southeast winds 10 to 20 kt becoming south.
Waves 1 to 3 ft.
.WEDNESDAY...South winds 10 to 20 kt. Chance of showers and
thunderstorms in the afternoon. Waves 2 to 4 ft.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 kt becoming west.
Showers and thunderstorms likely. Waves 1 to 3 ft.
.THURSDAY...North winds 10 to 20 kt increasing to 30 kt in the
afternoon. Chance of showers and thunderstorms. Waves 2 to 4 ft
building to 4 to 6 ft occasionally to 8 ft.
.FRIDAY...Northeast winds 10 to 20 kt. Waves 3 to 6 ft
occasionally to 8 ft.

$$

LMZ761-240315-
MAFOR 2321/
MICHIGAN NORTH 11720 11820 14120 11120 11820. Waves 2 to 4 ft
tonight and 3 to 5 ft Monday.

MICHIGAN SOUTH 11610 11710 15820. Waves 1 to 2 ft building to 2
to 4 ft tonight and building to 3 to 5 ft Monday.

$$

- Izzi

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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