Great Lakes Forecast
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000
FZUS63 KLOT 191950
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
250 PM CDT Thu Apr 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...High pressure of 30.6 inches over the Upper
Mississippi Valley will move slowly east to the western Great
Lakes on Friday, while weakening slightly to 30.5 inches. The high
will then continue to drift very slowly east across the central
and eastern Lakes through Sunday. The high will move across
southern New England by Monday morning, while low pressure of 29.7
inches tracks across northern Manitoba and Ontario, reaching
James Bay by Monday night. A cold front trailing from this low
will move across the western Lakes during the middle of next week.

LMZ261-362-364-366-563-565-567-868-200330-
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-
250 PM CDT Thu Apr 19 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Northwest winds 15 to 20 kt diminishing to 10 to 15 kt
this evening, and to 5 to 10 kt overnight. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 1 to 3 ft.
.FRIDAY...West winds 5 to 10 kt becoming southwest. Waves 1 to 2
ft.
.FRIDAY NIGHT...Southwest winds 5 to 10 kt becoming south. Waves
1 to 2 ft.
.SATURDAY...South winds 5 to 10 kt becoming southwest. Waves 1 to
2 ft.
.SATURDAY NIGHT...South winds 5 to 10 kt becoming southeast.
Waves 1 to 2 ft.
.SUNDAY...Southeast winds 5 to 10 kt becoming northeast. Waves 1
to 2 ft.
.SUNDAY NIGHT...East winds 5 to 10 kt becoming south. Waves 1 to
2 ft.
.MONDAY...South winds 10 to 15 kt becoming southwest. Waves 1 to
3 ft.
.TUESDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-200330-
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-
250 PM CDT Thu Apr 19 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...North winds 15 to 25 kt early, diminishing to 10 to 15
kt this evening, then becoming northwest at less than 10 kt by
morning. Waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to 4
ft late.
.FRIDAY...Northwest winds less than 10 kt becoming variable at
5 to 10 kt. Waves subsiding to 1 to 3 ft.
.FRIDAY NIGHT...East winds 5 to 10 kt. Waves 1 to 2 ft.
.SATURDAY...East winds 5 to 10 kt becoming northeast. Waves 1 to
2 ft.
.SATURDAY NIGHT...Northeast winds 5 to 10 kt becoming east. Waves
1 to 2 ft.
.SUNDAY...East winds 5 to 10 kt becoming northeast 10 to 15 kt.
Waves 1 to 3 ft.
.SUNDAY NIGHT...Northeast winds 10 to 15 kt becoming east. Waves
1 to 3 ft.
.MONDAY...East winds 10 to 15 kt becoming northeast 5 to 10 kt.
Waves 1 to 3 ft.
.TUESDAY...Southeast winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.

$$

LMZ761-200330-
MAFOR 1921/
MICHIGAN NORTH 12720 11710 12700 11600 11500 11510. Waves 4 to 6
ft occasionally to 8 ft subsiding to 1 to 3 ft tonight and to 1
to 2 ft by Friday afternoon.

MICHIGAN SOUTH 11830 11820 11710 14700 11900. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 2 to 4 ft late tonight and to
1 to 3 ft by Friday afternoon.

$$

Ratzer

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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