Great Lakes Forecast
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000
FZUS63 KLOT 251500
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
1000 AM CDT Sun Jun 25 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...A weak trough of low pressure averaging 29.8 inches
over the upper Great Lakes will drift southeast across the eastern
and lower Great Lakes today while high pressure of 30.3 inches
builds from the northern to the central Plains and lower Ohio
Valley. The high will remain in this position tonight into Monday
while weak low pressure of 29.9 inches moves across the northern
Lakes, with its trailing cold front moving across Lake Michigan.
The surface ridge axis will lift north to the southern portion of
the lake on Tuesday and then shift east. Low pressure of 29.4
inches will develop across the northern plains by Tuesday evening
and will track near or over the northern portion of the lake on
Wednesday night or Thursday morning.

LMZ261-362-364-366-563-565-567-868-252215-
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-
1000 AM CDT Sun Jun 25 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Northwest winds 10 to 20 kt becoming southwest
10 to 15 kt. Isolated showers this morning...then isolated
showers and thunderstorms this afternoon. Waves 2 to 4 ft.
.TONIGHT...West winds 10 to 15 kt becoming northwest 10 to 20 kt
late in the evening...then becoming north 15 to 25 kt after
midnight. Scattered showers and thunderstorms in the
evening...then scattered showers overnight. Waves building to 3
to 5 ft.
.MONDAY...North winds 15 to 25 kt. Showers likely in the
morning...then chance of showers in the afternoon. Waves 3 to 5
ft.
.MONDAY NIGHT...North winds 15 to 25 kt becoming west 10 to 20
kt. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.TUESDAY...West winds 10 to 20 kt becoming southwest. Waves 2 to
4 ft.
.TUESDAY NIGHT...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.
.WEDNESDAY...South winds 15 to 25 kt increasing to gales to 35
kt. Showers and thunderstorms. Waves 3 to 5 ft building to 7 to
10 ft occasionally to 13 ft.
.THURSDAY...Southwest winds 15 to 25 kt becoming northwest 10 to
20 kt. Chance of showers and thunderstorms. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-252215-
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-
1000 AM CDT Sun Jun 25 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...West winds 15 to 25 kt diminishing to 10 to
20 kt. Isolated showers and thunderstorms this afternoon. Waves
3 to 5 ft subsiding to 2 to 4 ft.
.TONIGHT...West winds 10 to 20 kt increasing to 15 to 25 kt.
Scattered showers with isolated thunderstorms in the evening...
then isolated showers overnight. Waves 2 to 4 ft building to 4 to
6 ft occasionally to 8 ft.
.MONDAY...West winds to 30 kt becoming northwest 15 to 25 kt.
Chance of showers in the afternoon. Waves 4 to 6 ft occasionally
to 8 ft subsiding to 3 to 5 ft.
.MONDAY NIGHT...Northwest winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.TUESDAY...West winds 10 to 20 kt becoming southwest and then
south. Waves 1 to 3 ft.
.TUESDAY NIGHT...South winds 10 to 20 kt becoming southwest 15 to
25 kt. Waves 2 to 4 ft building to 3 to 5 ft.
.WEDNESDAY...South winds 15 to 25 kt increasing to to 30 kt.
Showers and thunderstorms likely. Waves 3 to 6 ft occasionally to
8 ft building to 6 to 9 ft occasionally to 12 ft.
.THURSDAY...Southwest winds to 30 kt becoming west 10 to 20 kt in
the afternoon. Chance of showers and thunderstorms. Waves 4 to
7 ft occasionally to 9 ft subsiding to 3 to 5 ft.

$$
LMZ761-252215-
MAFOR 2515/
MICHIGAN NORTH 11720 11610 11510 11610 11720 11730 11830 11736.
Scattered showers and thunderstorms. Waves 2 to 4 feet today...
building to 3 to 5 feet tonight. Waves 3 to 5 feet Monday
morning.

MICHIGAN SOUTH 11630 13620 14630. Isolated showers and
thunderstorms. Waves 3 to 5 feet subsiding to 2 to 4 feet today.
Waves 2 to 4 feet building to 4 to 6 feet occasionally to 8 feet
tonight and Monday morning.

$$

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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