Great Lakes Forecast
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FZUS63 KLOT 050841
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
241 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 29.0 inches is located over Lake
Superior early this morning and will stall over western Ontario
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.

LMZ261-362-364-366-563-565-567-868-051715-
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-
241 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 early 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.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-051715-
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-
241 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.

$$

&&

LMZ761-051715-
MAFOR 0510/
MICHIGAN NORTH...Gale Warning in effect...12560 19570 11560 14660
11650. Chance of snow showers this afternoon and tonight. Waves
14 to 18 feet occasionally to 23 feet subsiding to 12 to 16 feet
occasionally to 21 feet today. Waves 12 to 16 feet occasionally to
21 feet subsiding to 8 to 11 feet occasionally to 14 feet
tonight.

MICHIGAN SOUTH...Gale Warning in effect...12660 12650 13660
11650. Chance of snow showers this afternoon and tonight. Waves 12
to 16 feet occasionally to 21 feet.

$$

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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