Great Lakes Forecast
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FZUS63 KLOT 051453
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
853 AM CST Tue Dec 5 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...Deep low pressure of 28.8 inches is located over
central Ontario this morning and will stall today as it deepens
to 28.7 inches. 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 Friday night into Saturday.

LMZ261-362-364-366-563-565-567-868-052230-
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-
853 AM CST Tue Dec 5 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT THROUGH WEDNESDAY MORNING...

.TODAY...Southwest gales to 45 kt becoming west. Occasional storm
force gusts to 50 kt possible this morning. Slight chance of snow
showers this morning...then chance of snow showers this
afternoon. Waves 14 to 18 ft occasionally to 23 ft subsiding to 12
to 16 ft occasionally to 21 ft.
.TONIGHT...West gales to 45 kt easing to 40 kt. Chance of snow
showers. Waves 12 to 16 ft occasionally to 21 ft subsiding to 8 to
11 ft occasionally to 14 ft.
.WEDNESDAY...West gales to 35 kt diminishing to 30 kt. Chance of
snow showers. Waves 7 to 10 ft occasionally to 13 ft subsiding to
6 to 9 ft occasionally to 12 ft.
.WEDNESDAY NIGHT...Northwest winds to 30 kt. Chance of snow
showers. Waves 4 to 7 ft occasionally to 9 ft.
.THURSDAY...Northwest winds to 30 kt diminishing to 15 to 25 kt.
Chance of snow showers. Waves 4 to 6 ft occasionally to 8 ft.
.THURSDAY NIGHT...Northwest winds 10 to 20 kt becoming west.
Chance of snow showers. Waves 2 to 4 ft.
.FRIDAY...West winds 15 to 25 kt. Chance of snow showers. Waves
3 to 5 ft.
.SATURDAY...North winds to 30 kt becoming northwest 15 to 25 kt.
Chance of snow showers. Waves 5 to 8 ft occasionally to 10 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-052230-
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-
853 AM CST Tue Dec 5 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT THROUGH WEDNESDAY MORNING...

.TODAY...West gales to 45 kt. Slight chance of snow showers this
morning...then chance of snow showers this afternoon. Waves 12 to
16 ft occasionally to 21 ft.
.TONIGHT...West gales to 45 kt diminishing to gales to 40 kt.
Chance of snow showers. Waves 12 to 16 ft occasionally to 21 ft.
.WEDNESDAY...West gales to 35 kt diminishing to 30 kt. Chance of
snow showers in the afternoon. Waves 8 to 12 ft occasionally to
16 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. Chance of snow showers.
Waves 4 to 6 ft occasionally to 8 ft.
.THURSDAY NIGHT...West winds 10 to 20 kt. Chance of snow showers.
Waves 3 to 5 ft.
.FRIDAY...West winds to 30 kt. Chance of snow showers. Waves 2 to
4 ft building to 3 to 5 ft.
.SATURDAY...North winds to 30 kt becoming northwest 15 to 25 kt.
Chance of snow showers. Waves 6 to 9 ft occasionally to 12 ft
building to 7 to 10 ft occasionally to 13 ft.

$$

LMZ761-052230-
MAFOR 0516/
MICHIGAN NORTH...Gale Warning in effect...11560 19570 13660
13650 11640. Chance of snow showers today...tonight...and
Wednesday morning. Waves 14 to 18 ft occasionally to 23 ft
subsiding to 12 to 16 ft occasionally to 21 ft this afternoon and
to 8 to 11 ft occasionally to 14 ft overnight. Waves 7 to 10 ft
occasionally to 13 ft Wednesday morning.

MICHIGAN SOUTH...Gale Warning in effect...11660 19560 13660
14650. Chance of snow showers this afternoon and tonight. Waves
12 to 16 feet occasionally to 21 feet today and tonight subsiding
to 8 to 12 feet occasionally to 16 feet Wednesday morning.

$$

MDB

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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