Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 150150
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
850 PM CDT Mon Aug 14 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...Weak low pressure of 29.8 inches over Iowa will cross
southern Lake Michigan overnight and move into the central Great
Lakes on Tuesday. Another low averaging 29.6 inches will develop
over eastern Colorado Tuesday and track toward the western Lakes
by Thursday morning. This low pressure area will then move east
later Thursday through Thursday night, with the trailing cold
front sweeping across the lake.

LMZ261-362-364-366-563-565-150930-
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-
850 PM CDT Mon Aug 14 2017

TWO RIVERS WI TO MANISTEE MI NORTH...

.REST OF TONIGHT...South winds 5 to 10 kt backing to northeast.
Slight chance of showers and thunderstorms. Waves 1 ft or less.
.TUESDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.
.TUESDAY NIGHT...North winds 10 to 20 kt becoming east. Waves
2 to 4 ft.
.WEDNESDAY...East winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.
.WEDNESDAY NIGHT...East winds 15 to 25 kt becoming southeast to
30 kt. Chance of showers in the evening...then showers likely
overnight. Waves 2 to 4 ft building to 3 to 5 ft.
.THURSDAY...Southeast winds to 30 kt becoming south 15 to 25 kt.
Showers in the morning...then chance of showers and thunderstorms
in the afternoon. Waves 4 to 6 ft occasionally to 8 ft subsiding
to 3 to 5 ft.
.THURSDAY NIGHT...Southwest winds 15 to 25 kt veering to north to
30 kt. Chance of showers and thunderstorms. Waves 2 to 4 ft.
.FRIDAY...Northwest winds to 30 kt diminishing to 10 to 20 kt in
the afternoon. Waves 2 to 4 ft.
.SATURDAY...Northwest winds 10 to 15 kt becoming west 5 to 10 kt.
Waves 1 ft or less.

$$

LMZ080-567-669-671-673-675-777-779-868-870-872-874-876-878-150930-
Lake Michigan from Michigan City IN to St. Joseph MI 5 NM
offshore to Mid Lake-
Lake Michigan from Two Rivers to Sheboygan WI 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 Pentwater to Manistee MI 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-
850 PM CDT Mon Aug 14 2017

TWO RIVERS WI TO MANISTEE MI SOUTH...

.REST OF TONIGHT...Southeast winds 5 to 10 kt increasing to 10 to
15 kt late this evening...then becoming south 10 to 20 kt after
midnight veering to northwest late. Chance of showers and
thunderstorms. Waves 1 to 3 ft.
.TUESDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.
.TUESDAY NIGHT...North winds 10 to 20 kt becoming east. Waves
2 to 4 ft.
.WEDNESDAY...Southeast winds 10 to 20 kt becoming east 10 to
15 kt. Waves 1 to 3 ft.
.WEDNESDAY NIGHT...Southeast winds 15 to 25 kt increasing to
30 kt. Chance of showers and thunderstorms in the evening... then
showers likely with a chance of thunderstorms overnight. Waves
1 to 3 ft building to 3 to 5 ft.
.THURSDAY...South winds to 30 kt becoming southwest 10 to 20 kt
in the afternoon. Chance of showers and thunderstorms. Waves 3 to
5 ft subsiding to 2 to 4 ft.
.THURSDAY NIGHT...West winds 15 to 25 kt becoming northwest to
30 kt. Waves 2 to 4 ft.
.FRIDAY...Northwest winds to 30 kt diminishing to 15 to 25 kt.
Waves 3 to 5 ft.
.SATURDAY...Northwest winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 2 ft.

$$
LMZ761-150930-
MAFOR 1503/
MICHIGAN NORTH 11200 12110 14820 11820. Slight chance of showers
and thunderstorms overnight. Waves 1 foot or less overnight. Waves
2 to 4 feet Tuesday and Tuesday evening.

MICHIGAN SOUTH 11300 11310 11420 11720 14820. Chance of showers
and thunderstorms overnight. Waves 1 to 3 feet overnight. Waves 2
to 4 feet Tuesday and Tuesday 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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