Great Lakes Forecast
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FZUS63 KLOT 190808
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
208 AM CST Fri Jan 19 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...While high pressure of 30.3 inches remains steady
over the Southeast, low pressure of 29.3 inches will cross
eastward over Ontario today and this evening. An associated cold
front will weaken as it moves over the northern part of the lake
overnight. Weak high pressure of 29.9 inches will prevail over the
lake Saturday into early Sunday. Low pressure of 29.5 inches will
develop across the central Plains Sunday afternoon. As this moves
northeast and deepens to 29.4 inches, a warm front will lift
northward across the lake on Monday. The low will pass across the
the lake on Monday night and onward to Quebec Tuesday, continuing
to gradually deepen.

LMZ261-362-364-366-563-565-567-868-191630-
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-
208 AM CST Fri Jan 19 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT FROM THIS AFTERNOON THROUGH THIS
EVENING...

.TODAY...Southwest winds 15 to 25 kt increasing to 30 kt late this
morning, and to gales to 35 kt by mid afternoon. Waves 3 to 6 ft
occasionally to 8 ft building to 7 to 10 ft occasionally to 13 ft.
.TONIGHT...Southwest gales to 35 kt becoming west to 30 kt after
midnight, then diminishing to 15 to 25 kt late. Waves 7 to 10 ft
occasionally to 13 ft subsiding to 6 to 9 ft occasionally to 12
ft.
.SATURDAY...West winds 10 to 20 kt becoming southwest 10 to
15 kt by early afternoon. Waves 4 to 6 ft occasionally to 8 ft
subsiding to 2 to 4 ft.
.SATURDAY NIGHT...Southwest winds 10 to 15 kt becoming south.
Waves 1 to 3 ft.
.SUNDAY...East winds 10 to 15 kt becoming northeast 10 to 20 kt.
Waves building to 2 to 4 ft.
.SUNDAY NIGHT...East winds 15 to 25 kt increasing to 30 kt.
Chance of rain and snow. Waves building to 4 to 7 ft occasionally
to 9 ft.
.MONDAY...East gales to 35 kt diminishing to 30 kt. Rain. Waves
6 to 9 ft occasionally to 12 ft.
.TUESDAY...Northwest gales to 35 kt diminishing to 30 kt. Chance
of snow showers. Waves 5 to 8 ft occasionally to 10 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-191630-
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-
208 AM CST Fri Jan 19 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT FROM THIS AFTERNOON THROUGH LATE
TONIGHT...

.TODAY...Southwest winds to 30 kt increasing to gales to 35 kt in
mid-afternoon. Waves 4 to 7 ft occasionally to 9 ft building to 7
to 10 ft occasionally to 13 ft.
.TONIGHT...Southwest gales to 35 kt diminishing to 30 kt late.
Waves 8 to 11 ft occasionally to 14 ft subsiding to 6 to 9 ft
occasionally to 12 ft.
.SATURDAY...Southwest winds 15 to 25 kt diminishing to 10 to
20 kt by early afternoon. Waves 4 to 7 ft occasionally to 9 ft
subsiding to 2 to 4 ft.
.SATURDAY NIGHT...Southwest winds 10 to 20 kt. Waves subsiding to 1
to 3 ft.
.SUNDAY...Southeast winds 10 to 15 kt. Chance of rain. Waves 1 to
3 ft.
.SUNDAY NIGHT...Southeast winds 10 to 20 kt increasing to 15 to
25 kt. Rain. Waves building to 3 to 5 ft.
.MONDAY...Southeast winds to 30 kt becoming south. Rain. Waves
4 to 7 ft occasionally to 9 ft.
.TUESDAY...Northwest winds to 30 kt. Chance of snow showers.
Waves 6 to 9 ft occasionally to 12 ft.

$$

LMZ761-191630-
MAFOR 1910/
MICHIGAN NORTH...Gale Warning in effect...12530 12540 13550 11640.
Waves 3 to 6 ft occasionally to 8 ft building to 7 to 10 ft
occasionally to 13 ft this afternoon and continuing this evening.
Waves subsiding to 6 to 9 ft occasionally to 12 ft overnight.

MICHIGAN SOUTH...Gale Warning in effect...14540 14550. Waves 4 to
7 ft occasionally to 9 ft building to 7 to 10 ft occasionally to
13 ft this afternoon, further building to 8 to 11 ft occasionally
to 14 ft this evening. Waves subsiding to 6 to 9 ft occasionally
to 12 ft late tonight.

$$

MTF

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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