Great Lakes Forecast
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085
FZUS63 KMKX 192027
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
327 PM CDT Wed Sep 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 over Ontario and the
northern Great Lakes will gradually shift northeast tonight. Low
pressure of 29.5 inches will develop over the Central Plains
tonight and then lift northeast to the Upper Mississippi Valley
Thursday evening. The low will track across the Upper Great Lakes
Thursday night while dragging a strong cold front across the lake.
High pressure of 30.3 inches will spread across the Upper
Mississippi Valley and Great Lakes Region Saturday.

LMZ261-362-364-366-563-565-567-868-200315-
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-
327 PM CDT Wed Sep 19 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WATCH IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY
EVENING...

.TONIGHT...East winds 10 to 15 kt. Slight chance of showers and
thunderstorms this evening, then showers likely with slight
chance of thunderstorms overnight. Waves 1 to 3 ft.
.THURSDAY...East winds 10 to 20 kt becoming southeast 15 to
25 kt. Showers likely with slight chance of thunderstorms in the
morning, then showers likely with a chance of thunderstorms in
the afternoon. Waves 2 to 4 ft.
.THURSDAY NIGHT...South winds to 30 kt increasing to gales to
35 kt late in the evening, then becoming southwest gales to 40 kt
after midnight diminishing to gales to 35 kt late. Chance of
showers and thunderstorms. Waves 4 to 6 ft occasionally to 8 ft
building to 10 to 14 ft occasionally to 18 ft.
.FRIDAY...West gales to 35 kt becoming northwest to 30 kt. Waves
8 to 12 ft occasionally to 16 ft subsiding to 5 to 8 ft
occasionally to 10 ft.
.FRIDAY NIGHT...North winds to 30 kt becoming northeast 10 to
20 kt overnight. Waves 5 to 8 ft occasionally to 10 ft.
.SATURDAY...Southeast winds 10 to 15 kt veering to southwest.
Waves 3 to 5 ft subsiding to 1 to 3 ft.
.SATURDAY NIGHT...Southwest winds 10 to 15 kt veering to
northwest. Waves 1 to 2 ft.
.SUNDAY...East winds 10 to 15 kt. Waves 1 to 3 ft.
.MONDAY...South winds 10 to 20 kt. Waves 4 to 6 ft occasionally
to 8 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-200315-
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-
327 PM CDT Wed Sep 19 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Northeast winds 10 to 15 kt becoming southeast 10 to
20 kt. Slight chance of showers and thunderstorms this evening,
then chance of showers and thunderstorms overnight. Waves 2 to
4 ft.
.THURSDAY...Southeast winds 10 to 20 kt becoming south. Chance of
showers and thunderstorms in the morning, then slight chance of
showers and thunderstorms in the afternoon. Waves 2 to 4 ft.
.THURSDAY NIGHT...South winds to 30 kt becoming southwest. Waves
4 to 6 ft occasionally to 8 ft building to 7 to 10 ft
occasionally to 13 ft.
.FRIDAY...West winds to 30 kt becoming northwest. Waves 7 to
10 ft occasionally to 13 ft.
.FRIDAY NIGHT...North winds to 30 kt becoming northeast 10 to
20 kt overnight. Waves 6 to 9 ft occasionally to 12 ft subsiding
to 5 to 8 ft occasionally to 10 ft.
.SATURDAY...East winds 10 to 15 kt diminishing to 5 to 10 kt.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.SATURDAY NIGHT...Northeast winds 5 to 10 kt becoming east. Waves
1 to 2 ft.
.SUNDAY...East winds 5 to 10 kt becoming southeast. Waves 1 to
2 ft.
.MONDAY...Southeast winds 10 to 20 kt. Waves 4 to 6 ft
occasionally to 8 ft.

$$

LMZ761-200315-
MAFOR 1921/
MICHIGAN NORTH 11100 13200 12219 12316. Chance of showers this
evening. Chance of thunderstorms late Thursday morning. Waves 1 to
3 ft tonight. Waves 2 to 4 ft Thursday.

MICHIGAN SOUTH 12100 11210 11310 12319 12410. Chance of showers
and thunderstorms late this evening through Thursday morning.
Waves 2 to 4 ft.

$$


DDV

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

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



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