Great Lakes Forecast
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434
FZUS63 KLOT 202019
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
219 PM CST Sat Jan 20 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...A trough of low pressure of 29.6 inches over the
South High Plains will will deepen to 29.4 inches as it moves to
northern Lake Michigan Monday night, then continues northeast
across southern Quebec Tuesday evening. A broad ridge of high
pressure of 30.3 inches over the Plains Tuesday night will move
across the western Great Lakes Wednesday.

LMZ261-362-364-366-563-565-210430-
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-
219 PM CST Sat Jan 20 2018

TWO RIVERS WI TO MANISTEE MI NORTH...

...GALE WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY
EVENING...

.TONIGHT...Southwest winds 10 to 15 kt becoming south. Waves 1 to
3 ft.
.SUNDAY...Southeast winds 10 to 15 kt backing to northeast 10 to
20 kt. Waves 1 to 3 ft.
.SUNDAY NIGHT...Northeast winds 10 to 20 kt becoming east gales to
35 kt late. Chance of rain and snow overnight. Waves 3 to 5 ft
building to 4 to 7 ft occasionally to 9 ft.
.MONDAY...East gales to 40 kt. Periods of Rain, snow and sleet.
Waves 7 to 10 ft occasionally to 13 ft building to 8 to 11 ft
occasionally to 14 ft.
.MONDAY NIGHT...Northeast gales to 35 kt. Snow, rain and sleet in
the evening...then snow overnight. Waves 8 to 11 ft occasionally
to 14 ft subsiding to 6 to 9 ft occasionally to 12 ft.
.TUESDAY...North gales to 35 kt diminishing to 30 kt. Snow likely
in the morning...then chance of snow in the afternoon. Waves 7 to
10 ft occasionally to 13 ft.
.TUESDAY NIGHT...North winds to 30 kt diminishing to 15 to 25 kt.
Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.WEDNESDAY...North winds 10 to 20 kt becoming northeast 10 to
15 kt. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.THURSDAY...Southwest winds 10 to 15 kt becoming south 10 to
20 kt. Waves 1 to 3 ft building to 3 to 5 ft.

$$

LMZ080-567-669-671-673-675-777-779-868-870-872-874-876-878-210430-
Lake Michigan from Michigan City IN to St. Joseph MI 5 NM
offshore to Mid Lake-
Lake Michigan from Two Rivers to Sheboygan WI 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 Pentwater to Manistee MI 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-
219 PM CST Sat Jan 20 2018

TWO RIVERS WI TO MANISTEE MI SOUTH...

.TONIGHT...South winds 10 to 15 kt. Patchy drizzle overnight.
Waves 1 to 3 ft.
.SUNDAY...Southeast winds 10 to 15 kt becoming east 10 to 20 kt.
Areas of drizzle. Waves 1 to 3 ft.
.SUNDAY NIGHT...East winds 10 to 20 kt increasing to 30 kt.
Widespread fog. Chance of rain in the evening...then rain
overnight. Waves 2 to 4 ft building to 3 to 5 ft.
.MONDAY...East winds to 30 kt becoming southeast. Areas of fog.
Rain. Waves 5 to 8 ft occasionally to 10 ft.
.MONDAY NIGHT...South winds 10 to 20 kt veering to west gales to
35 kt overnight. Rain likely in the evening...then rain and snow
likely overnight. Waves 4 to 6 ft occasionally to 8 ft building
to 5 to 8 ft occasionally to 10 ft.
.TUESDAY...Northwest gales to 40 kt. Chance of snow. Waves 7 to
10 ft occasionally to 13 ft building to 8 to 11 ft occasionally to
14 ft.
.TUESDAY NIGHT...Northwest winds to 30 kt diminishing to 15 to
25 kt. Chance of snow. Waves 7 to 10 ft occasionally to 13 ft
subsiding to 4 to 7 ft occasionally to 9 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft.
.THURSDAY...West winds 10 to 20 kt becoming south. Waves 1 to
3 ft building to 3 to 5 ft.

$$

LMZ761-210430-
MAFOR 2022/
MICHIGAN NORTH 11510 14410 11310 11210 11220. Waves 1 to 3 ft.

MICHIGAN SOUTH 14410 11410 12315 11215. Patchy drizzle after
midnight tonight. Areas of drizzle Sunday. Waves 1 to 3 ft.


$$


KJB

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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