Great Lakes Forecast
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000
FZUS63 KLOT 042041
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
241 PM 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 29.3 inches located over the upper
Mississippi Valley will deepen to 28.8 inches as it reaches south
central Ontario early Tuesday morning. The low will slowly shift
to James Bay by midday Wednesday then to far northern Quebec
Thursday. Another low of 29.6 inches will form over Lake Superior
Friday and shift to Lake Huron Saturday. A weak ridge averaging
30.1 inches passes over the western lakes Saturday night or
Sunday.

LMZ261-362-364-366-563-565-567-868-050430-
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 PM CST Mon Dec 4 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

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

.TONIGHT...South gales to 45 kt becoming southwest. A few storm
force gusts to 50 kt possible. Rain showers likely with slight
chance of thunderstorms this 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. Slight chance
of snow showers. Waves 12 to 16 ft occasionally to 21 ft.
.TUESDAY NIGHT...West gales to 45 kt diminishing to gales to
40 kt. Chance of snow in the evening. Waves 10 to 14 ft
occasionally to 18 ft subsiding to 8 to 12 ft occasionally to
16 ft.
.WEDNESDAY...West gales to 35 kt diminishing to 30 kt. Chance of
snow. Waves 7 to 10 ft occasionally to 13 ft subsiding to 4 to
7 ft occasionally to 9 ft.
.WEDNESDAY NIGHT...Northwest winds to 30 kt. Chance of snow.
Waves 4 to 7 ft occasionally to 9 ft.
.THURSDAY...Northwest winds to 30 kt diminishing to 15 to 25 kt.
Chance of snow. Waves 3 to 5 ft.
.THURSDAY NIGHT...Northwest winds 10 to 20 kt becoming west.
Chance of snow. Waves 2 to 4 ft.
.FRIDAY...West winds 15 to 25 kt. Chance of snow. Waves 1 to
3 ft.
.SATURDAY...North winds to 30 kt becoming northwest. Chance of
snow. Waves 4 to 7 ft occasionally to 9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-050430-
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 PM CST Mon Dec 4 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

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

.TONIGHT...South gales to 45 kt becoming west gales to 40 kt.
Chance of rain showers and slight chance of thunderstorms this
evening. Waves 12 to 16 ft occasionally to 21 ft.
.TUESDAY...West gales to 40 kt increasing to gales to 45 kt.
Slight chance of snow showers in the afternoon. Waves 10 to 14 ft
occasionally to 18 ft.
.TUESDAY NIGHT...West gales to 45 kt diminishing to gales to
40 kt. Chance of snow in the evening. Waves 10 to 14 ft
occasionally to 18 ft subsiding to 8 to 12 ft occasionally to
16 ft.
.WEDNESDAY...West gales to 35 kt diminishing to 30 kt. Chance of
snow. 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.
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 diminishing to 10 to
20 kt. Chance of snow. Waves 4 to 6 ft occasionally to 8 ft.
.THURSDAY NIGHT...West winds 10 to 20 kt. Chance of snow. Waves
2 to 4 ft.
.FRIDAY...West winds 15 to 25 kt increasing to 30 kt. Chance of
snow. Waves 2 to 4 ft.
.SATURDAY...Northwest winds to 30 kt. Chance of snow. Waves 4 to
7 ft occasionally to 9 ft.

$$

&&STORM

LMZ761-050430-
MAFOR 0422/
MICHIGAN NORTH...Gale Warning in effect...11466 11466 19476 11566
19576 12560 19570 12560 11660. Waves 14 to 18 feet occasionally
to 23 feet tonight. Waves 12 to 16 feet occasionally to 21 feet
Tuesday.


MICHIGAN SOUTH...Gale Warning in effect...11450 11466 11556 14650
11660. Waves 12 to 16 feet occasionally to 21 feet tonight. Waves
10 to 14 feet occasionally to 18 feet Tuesday.

$$


JEE

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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