Great Lakes Forecast
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000
FZUS63 KLOT 040843
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
243 AM CST Mon Dec 4 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...Low pressure of 29.4 inches is located over South
Dakota  early this morning and will lift to western Lake Superior
deepening to 29.1 inches this evening...then further deepen to
28.8 inches overnight as it lifts across western Ontario. The low
will slowly shift to James Bay by midday Wednesday then lift to
far northern Quebec Thursday. Another low of 29.7 inches will form
over Lake Superior Friday and shift to Lake Huron Saturday.

LMZ261-362-364-366-563-565-567-868-041630-
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-
243 AM CST Mon Dec 4 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT THROUGH LATE TUESDAY NIGHT...

.TODAY...South gales to 35 kt increasing to gales to 45 kt. Rain
showers and slight chance of thunderstorms this morning... then
rain showers likely this afternoon. Waves 7 to 10 ft occasionally
to 13 ft building to 14 to 18 ft occasionally to 23 ft.
.TONIGHT...South gales to 45 kt becoming southwest. A few storm
force gusts to 50 kt possible. Rain showers and slight chance of
thunderstorms in the evening...then slight chance of rain showers
overnight. Waves 14 to 18 ft occasionally to 23 ft.
.TUESDAY...Southwest gales to 45 kt becoming west. Waves 12 to
16 ft occasionally to 21 ft.
.TUESDAY NIGHT...West gales to 45 kt diminishing to gales to
35 kt overnight. Chance of snow showers. Waves 10 to 14 ft
occasionally to 18 ft subsiding to 8 to 11 ft occasionally to
14 ft.
.WEDNESDAY...West winds to 30 kt. A few gales to 35 kt possible in
the morning. Chance of snow showers. Waves 6 to 9 ft occasionally
to 12 ft subsiding to 4 to 7 ft occasionally to 9 ft.
.WEDNESDAY NIGHT...Northwest winds to 30 kt diminishing to 15 to
25 kt. Chance of snow showers. Waves 4 to 7 ft occasionally to
9 ft.
.THURSDAY...Northwest winds 15 to 25 kt diminishing to 10 to
20 kt. Chance of snow showers. Waves 3 to 5 ft.
.FRIDAY...West winds 10 to 20 kt. Chance of snow showers. Waves
1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-041630-
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-
243 AM CST Mon Dec 4 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT THROUGH LATE TUESDAY NIGHT...

.TODAY...South gales to 35 kt increasing to 40 kt. Slight chance
of showers. Waves 6 to 9 ft occasionally to 12 ft building to 10
to 14 ft occasionally to 18 ft.
.TONIGHT...South gales to 40 kt becoming west. Rain showers and
slight chance of thunderstorms in the evening. Waves 12 to 16 ft
occasionally to 21 ft.
.TUESDAY...West gales to 40 kt increasing to gales to 45 kt.
Waves 10 to 14 ft occasionally to 18 ft.
.TUESDAY NIGHT...West gales to 45 kt diminishing to gales to
35 kt overnight. Chance of snow showers overnight. Waves 10 to
14 ft occasionally to 18 ft.
.WEDNESDAY...West winds to 30 kt. A few gales to 35 kt possible in
the morning. Chance of snow showers. Waves 8 to 11 ft
occasionally to 14 ft subsiding to 6 to 9 ft occasionally to 12
ft.
.WEDNESDAY NIGHT...Northwest winds to 30 kt. Chance of snow
showers. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to
7 ft occasionally to 9 ft.
.THURSDAY...Northwest winds 15 to 25 kt becoming west 10 to
20 kt. Chance of snow showers. Waves 4 to 6 ft occasionally to
8 ft.
.FRIDAY...West winds 10 to 20 kt. Chance of snow showers. Waves
2 to 4 ft.

$$

&&

LMZ761-041630-
MAFOR 0410/
MICHIGAN NORTH...Gale Warning in effect...13456 13466 11566 11560
19570. Waves 7 to 10 feet occasionally to 13 feet building to 14
to 18 feet occasionally to 23 feet today. Waves 14 to 18 feet
occasionally to 23 feet tonight.

MICHIGAN SOUTH...Gale Warning in effect...11456 14450 11456 11556
11650. Waves 6 to 9 feet occasionally to 12 feet building to 10
to 14 feet occasionally to 18 feet today. Waves 12 to 16 feet
occasionally to 21 feet tonight.

$$

BMD

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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