Great Lakes Forecast
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000
FZUS63 KMKX 212001
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
301 PM CDT Fri Sep 21 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...

Low pressure of 29.0 inches just southeast of James Bay, Canada
will continue northeastward across northern Quebec tonight. High
pressure of 30.4 inches over the northern Great Plains will spread
to central Wisconsin and lower Michigan for Saturday.

On Sunday, an additional area of high pressure of 30.5 inches
will slide across Ontario and Quebec with an easterly flow over
Lake Michigan.

LMZ261-563-565-567-669-671-868-870-872-212145-
Lake Michigan from Seul Choix Point to Rock Island Passage 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 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 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-
301 PM CDT Fri Sep 21 2018

NORTH POINT LIGHT WI TO GRAND HAVEN MI NORTH...

...GALE WARNING IN EFFECT UNTIL 7 PM CDT THIS EVENING...

.REST OF TODAY...West gales to 40 kt becoming northwest. Waves
7 to 10 ft occasionally to 13 ft.
.TONIGHT...Northwest gales to 35 kt becoming north 10 to 15 kt.
Waves 7 to 10 ft occasionally to 13 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.SATURDAY...Northeast winds 10 to 15 kt veering to south 10 to
20 kt. Waves 3 to 5 ft.
.SATURDAY NIGHT...Southwest winds 10 to 20 kt. Waves 3 to 5 ft.
.SUNDAY...Northeast winds 10 to 15 kt veering to southeast 10 to
20 kt. Waves 1 to 3 ft building to 2 to 4 ft.
.SUNDAY NIGHT...Southeast winds 10 to 20 kt increasing to 15 to
25 kt. Waves 3 to 5 ft.
.MONDAY...Southeast winds 15 to 25 kt becoming south. Waves 3 to
5 ft.
.TUESDAY...Southwest winds 15 to 25 kt becoming west 10 to 20 kt.
Chance of showers. Waves 3 to 5 ft.

$$

LMZ362-364-366-212145-
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-
301 PM CDT Fri Sep 21 2018

WILMETTE HARBOR IL TO ST. JOSEPH MI SOUTH TO ROCK ISLAND PASSAGE
TO CHARLEVOIX MI...

...GALE WARNING IN EFFECT UNTIL 11 PM CDT THIS EVENING...

.REST OF TODAY...West gales to 45 kt becoming northwest gales to
40 kt. Chance of showers. Waves 8 to 11 ft occasionally to 14 ft.
.TONIGHT...Northwest gales to 35 kt becoming north 10 to 15 kt.
Slight chance of showers in the evening. Waves 6 to 9 ft
occasionally to 12 ft subsiding to 3 to 5 ft.
.SATURDAY...West winds 10 to 15 kt becoming southwest 10 to
20 kt. Waves 2 to 4 ft.
.SATURDAY NIGHT...Southwest winds 10 to 20 kt becoming west.
Waves 3 to 5 ft.
.SUNDAY...North winds 10 to 20 kt becoming east. Waves 2 to 4 ft.
.SUNDAY NIGHT...East winds 10 to 20 kt becoming southeast. Waves
3 to 5 ft.
.MONDAY...Southeast winds 10 to 20 kt becoming south. Waves 3 to
5 ft.
.TUESDAY...Southwest winds 15 to 25 kt becoming northwest 10 to
20 kt. Waves 3 to 5 ft.

$$

LMZ080-673-675-777-779-874-876-878-212145-
Lake Michigan from Michigan City IN to St. Joseph MI 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 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-
301 PM CDT Fri Sep 21 2018

NORTH POINT LIGHT WI TO GRAND HAVEN MI SOUTH...

.REST OF TODAY...West to 30 kt becoming northwest to 30 kt. Waves
7 to 10 ft occasionally to 13 ft.
.TONIGHT...Northwest winds to 30 kt becoming north 15 to 25 kt
late in the evening, then diminishing to 10 to 20 kt after
midnight becoming northeast late. Waves 7 to 10 ft occasionally
to 13 ft subsiding to 4 to 7 ft occasionally to 9 ft.
.SATURDAY...East winds 10 to 20 kt diminishing to 5 to 10 kt.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.SATURDAY NIGHT...Southeast winds 5 to 10 kt becoming south.
Waves 1 to 2 ft.
.SUNDAY...Southeast winds 5 to 10 kt becoming east. Waves 1 ft or
less.
.SUNDAY NIGHT...East winds 10 to 20 kt becoming southeast. Waves
1 to 3 ft building to 3 to 5 ft.
.MONDAY...Southeast winds 10 to 20 kt. Waves 3 to 5 ft.
.TUESDAY...Southwest winds 10 to 20 kt becoming west. Chance of
showers. Waves 2 to 4 ft.

$$

LMZ761-212145-
MAFOR 2115/
MICHIGAN NORTH...GALE WARNING IN EFFECT...12660 12750 11840 11820
11810 11610. Slight chance of showers far north. Waves 8 to 12 ft
occasionally to 16 ft this afternoon. Waves 7 to 10 ft
occasionally to 13 ft subsiding to 4 to 6 ft occasionally to 8 ft
tonight. Waves 3 to 5 ft subsiding to 2 to 4 ft Saturday morning.

MICHIGAN SOUTH...GALE WARNING IN EFFECT...12650 12740 12820
12110. Waves 8 to 11 ft occasionally to 14 ft this afternoon.
Waves 7 to 10 ft occasionally to 13 ft subsiding to 4 to 7 ft
occasionally to 9 ft tonight. Waves 4 to 6 ft occasionally to 8 ft
Saturday morning.

$$


Gehring

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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