Great Lakes Forecast
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FZUS63 KLOT 151942
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
242 PM CDT Sun Apr 15 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...Low pressure of 29.6 inches over southern Indiana
will gradually deepen to 29.4 inches while lifting across the
eastern Great Lakes tonight and Monday. The low will continue to
lift into southern Quebec Tuesday morning. Meanwhile, high
pressure of 30.8 inches centered over Northern Ontario will drift
to northern Quebec by this evening. A ridge of high pressure
averaging 30.4 inches will build into the Northern and Central
Plains today and then spread to the Middle and Upper Mississippi
Valley Monday night into Tuesday. Low pressure will develop across
the central Plains on Tuesday, and then track to the southern
Great Lakes Wednesday.

LMZ261-362-364-366-563-565-160315-
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-
242 PM CDT Sun Apr 15 2018

TWO RIVERS WI TO MANISTEE MI NORTH...

...GALE WARNING IN EFFECT UNTIL 1 AM CDT MONDAY...

.TONIGHT...Northeast gales to 35 kt becoming north to 30 kt
overnight. Snow with areas of light freezing drizzle. Waves 8 to
12 ft occasionally to 16 ft.
.MONDAY...North winds to 30 kt becoming northwest. Snow showers.
Waves 7 to 10 ft occasionally to 13 ft.
.MONDAY NIGHT...Northwest winds to 30 kt. Snow showers likely in
the evening, then chance of snow showers overnight. Waves 6 to
9 ft occasionally to 12 ft.
.TUESDAY...Northwest winds to 30 kt diminishing to 15 to 25 kt.
Chance of snow showers in the morning. Waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft.
.TUESDAY NIGHT...North winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.WEDNESDAY...Northeast winds 10 to 20 kt increasing to 15 to
25 kt. Chance of rain and snow in the afternoon. Waves 1 to 3 ft
building to 3 to 5 ft.
.WEDNESDAY NIGHT...Northeast winds to 30 kt. Chance of rain and
snow. Waves 4 to 7 ft occasionally to 9 ft.
.THURSDAY...North winds to 30 kt diminishing to 15 to 25 kt.
Waves 4 to 7 ft occasionally to 9 ft.
.FRIDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ567-669-868-870-160315-
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 Pentwater to Manistee MI 5 NM offshore to Mid
Lake-
Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid
Lake-
242 PM CDT Sun Apr 15 2018

TWO RIVERS WI TO MANISTEE MI SOUTH TO PORT WASHINGTON WI TO
WHITEHALL MI...

...GALE WARNING IN EFFECT UNTIL 7 PM CDT THIS EVENING...

.TONIGHT...Northeast gales to 35 kt becoming north to 30 kt.
Drizzle, snow with patchy light freezing drizzle this evening,
then snow, areas of drizzle and light freezing drizzle overnight.
Waves 8 to 11 ft occasionally to 14 ft.
.MONDAY...North winds to 30 kt becoming northwest. Snow showers
likely in the morning, then chance of snow showers in the
afternoon. Waves 8 to 11 ft occasionally to 14 ft.
.MONDAY NIGHT...Northwest winds to 30 kt. Chance of snow showers.
Waves 7 to 10 ft occasionally to 13 ft.
.TUESDAY...Northwest winds to 30 kt diminishing to 10 to 20 kt in
the afternoon. Waves 6 to 9 ft occasionally to 12 ft subsiding to
4 to 6 ft occasionally to 8 ft.
.TUESDAY NIGHT...North winds 10 to 15 kt becoming northeast.
Waves 2 to 4 ft subsiding to 1 to 3 ft.
.WEDNESDAY...East winds 10 to 20 kt becoming northeast. Rain
likely in the afternoon. Waves 1 to 3 ft building to 2 to 4 ft.
.WEDNESDAY NIGHT...Northeast winds to 30 kt. Rain likely with a
chance of snow. Waves 4 to 6 ft occasionally to 8 ft building to
4 to 7 ft occasionally to 9 ft.
.THURSDAY...North winds to 30 kt. Waves 4 to 7 ft occasionally to
9 ft.
.FRIDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ080-671-673-675-777-779-872-874-876-878-160315-
Lake Michigan from Michigan City IN to St. Joseph MI 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 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-
242 PM CDT Sun Apr 15 2018

PORT WASHINGTON WI TO WHITEHALL MI SOUTH...

.TONIGHT...North winds to 30 kt becoming northwest. Drizzle with
possible snow and freezing drizzle this evening, then snow likely
with possible drizzle and freezing drizzle overnight. Waves 6 to
9 ft occasionally to 12 ft.
.MONDAY...Northwest winds to 30 kt. Snow likely in the morning,
then chance of snow showers in the afternoon. Waves 7 to 10 ft
occasionally to 13 ft building to 8 to 11 ft occasionally to
14 ft.
.MONDAY NIGHT...Northwest winds to 30 kt. Chance of snow showers.
Waves 7 to 10 ft occasionally to 13 ft.
.TUESDAY...Northwest winds to 30 kt diminishing to 10 to 20 kt in
the afternoon. Waves 6 to 9 ft occasionally to 12 ft subsiding to
4 to 7 ft occasionally to 9 ft.
.TUESDAY NIGHT...North winds 10 to 15 kt becoming northeast 10 to
20 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.WEDNESDAY...East winds 15 to 25 kt. Chance of rain in the
morning, then rain likely in the afternoon. Waves 2 to 4 ft.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 kt becoming north to
30 kt. Chance of rain. Waves 3 to 5 ft building to 4 to 7 ft
occasionally to 9 ft.
.THURSDAY...North winds to 30 kt diminishing to 15 to 25 kt.
Waves 5 to 8 ft occasionally to 10 ft.
.FRIDAY...North winds 10 to 20 kt. Waves 3 to 5 ft.

$$

LMZ761-160315-
MAFOR 1521/
MICHIGAN NORTH...GALE WARNING IN EFFECT...14157 11857 12847
11747. Areas of light freezing drizzle early this evening. Waves
10 to 14 ft occasionally to 18 ft subsiding to 8 to 11 ft
occasionally to 14 ft tonight. Waves 8 to 11 ft occasionally to
14 ft Monday.

MICHIGAN SOUTH...12847 11845 14747 11740. Patchy light freezing
drizzle early this evening. Areas of drizzle with patchy light
freezing drizzle late this evening. Chance of snow showers Monday.
Waves 8 to 11 ft occasionally to 14 ft tonight. Waves 8 to 11 ft
occasionally to 14 ft building to 8 to 12 ft occasionally to 16 ft
Monday.

$$

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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