Great Lakes Forecast
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000
FZUS63 KLOT 200148
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
848 PM CDT Wed Jul 19 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 high pressure of 30.1 inches over the lake
will move over the eastern Great Lakes late tonight. A trough of
low pressure will develop over the northern and central Plains
this evening and then shift over the lake Thursday morning
averaging 29.9 inches. A 30.0 inch high will move over the lake
early Friday morning, and shift to over the eastern Great Lakes
Friday evening. Another low of 29.6 inches is forecast to move
over the lake Saturday night.

LMZ261-362-364-366-563-565-567-868-200930-
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-
848 PM CDT Wed Jul 19 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Southeast winds 10 to 15 kt becoming variable
overnight. Slight chance of showers this evening...then chance of
showers and thunderstorms overnight. Waves 1 to 2 ft.
.THURSDAY...South winds 10 to 15 kt becoming southwest. Chance of
showers and thunderstorms in the morning...then slight chance of
showers and thunderstorms in the afternoon. Waves 1 to 2 ft.
.THURSDAY NIGHT...Variable winds 5 to 10 kt becoming south late.
Waves 1 to 2 ft.
.FRIDAY...South winds 5 to 10 kt. Waves 1 ft or less.
.FRIDAY NIGHT...Southeast winds 10 to 15 kt becoming east 10 to
20 kt. Chance of showers and thunderstorms. Waves 1 to 2 ft.
.SATURDAY...East winds 10 to 15 kt becoming northeast. Chance of
showers and thunderstorms. Waves 1 to 2 ft.
.SATURDAY NIGHT...North winds 10 to 15 kt backing to west 10 to
20 kt. Chance of showers and thunderstorms. Waves 1 to 2 ft.
.SUNDAY...North winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of showers and thunderstorms. Waves 2 to 4 ft.
.MONDAY...North winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-200930-
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-
848 PM CDT Wed Jul 19 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Northeast winds less than 10 kt veering to
southeast late this evening...then becoming south 10 to 15 kt
overnight. Showers and thunderstorms likely in the evening with
gusty northwest winds, then chance of showers and thunderstorms
again overnight. Waves 1 to 2 ft.
.THURSDAY...Southwest winds 10 to 15 kt veering to north. Chance
of showers and thunderstorms in the morning...then slight chance
of showers and thunderstorms in the afternoon. Waves 1 to 2 ft.
.THURSDAY NIGHT...North winds 10 to 15 kt becoming east 5 to
10 kt. Waves 1 to 2 ft.
.FRIDAY...Southeast winds 5 to 10 kt increasing to 10 to 15 kt.
Chance of showers and thunderstorms in the afternoon. Waves 1 ft
or less.
.FRIDAY NIGHT...East winds 15 to 25 kt becoming southeast.
Showers and thunderstorms likely. Waves 2 to 4 ft.
.SATURDAY...South winds 10 to 15 kt becoming west. Chance of
showers and thunderstorms. Waves 1 to 3 ft.
.SATURDAY NIGHT...Northwest winds 10 to 15 kt increasing to 10 to
20 kt. Chance of showers and thunderstorms. Waves 1 to 2 ft.
.SUNDAY...West winds 10 to 20 kt becoming northwest 15 to 25 kt.
Waves 1 to 3 ft.
.MONDAY...North winds 15 to 25 kt. Waves 3 to 5 ft.

$$
LMZ761-200930-
MAFOR 2003/
MICHIGAN NORTH 12300 11910 11410 11510 11610 11500 11400. Chance
of showers and thunderstorms late this evening. Chance of showers
and thunderstorms late Thursday. Waves 1 foot or less.

MICHIGAN SOUTH 10200 11300 12410 12510 11610 12810. Chance of
showers and thunderstorms overnight. Chance of showers and
thunderstorms late Thursday. Waves 1 to 3 ft.

$$


KMD

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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