Great Lakes Forecast
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FZUS63 KLOT 231948
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
248 PM CDT Fri Jun 23 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 29.4 inches over northern Quebec will
continue to lift to the northeast while the associated cold front
pushes through the Ohio Valley. A secondary weak trough averaging
30.0 inches will cross the lake Sunday. High pressure of 30.2
inches over central Canada will build into the northern Plains
Saturday and strengthen to 30.4 inches on Sunday. High pressure
will spread east across the western Great Lakes region early next
week. High pressure will prevail over the Great Lakes through mid
week and then shift east off the mid Atlantic coast Wednesday
night and Thursday. A series of low pressure systems are then
expected to track across the upper Great Lakes during the middle
and later parts of next week.

LMZ261-362-364-366-563-565-567-868-240330-
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-
248 PM CDT Fri Jun 23 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Northwest winds 10 to 20 kt becoming west. Waves 1 to
3 ft.
.SATURDAY...West winds 10 to 20 kt. Slight chance of showers in
the morning...then chance of showers and slight chance of
thunderstorms in the afternoon. Waves 2 to 4 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt. Chance of showers.
Waves 2 to 4 ft.
.SUNDAY...Northwest winds 10 to 20 kt becoming west 10 to 15 kt.
Chance of showers and thunderstorms in the afternoon. Waves 1 to
3 ft.
.SUNDAY NIGHT...Northwest winds 10 to 20 kt becoming north.
Chance of showers. Waves 1 to 3 ft.
.MONDAY...North winds 10 to 20 kt becoming northwest. Chance of
showers in the morning. Waves 1 to 3 ft.
.MONDAY NIGHT...West winds 10 to 20 kt. Waves 1 to 2 ft.
.TUESDAY...West winds 10 to 20 kt becoming southwest. Waves 1 to
3 ft.
.WEDNESDAY...South winds to 30 kt. Waves 4 to 6 ft occasionally
to 8 ft building to 4 to 7 ft occasionally to 9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-240330-
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-
248 PM CDT Fri Jun 23 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...West winds 10 to 20 kt becoming northwest. Waves 2 to
4 ft building to 3 to 5 ft.
.SATURDAY...Northwest winds 10 to 20 kt becoming west. Slight
chance of showers and thunderstorms in the afternoon. Waves 3 to
5 ft subsiding to 2 to 4 ft.
.SATURDAY NIGHT...West winds 10 to 20 kt increasing to 15 to
25 kt. Waves 2 to 4 ft.
.SUNDAY...West winds 10 to 20 kt. Waves 2 to 4 ft.
.SUNDAY NIGHT...West winds 10 to 20 kt becoming northwest 15 to
25 kt. Chance of showers. Waves 2 to 4 ft.
.MONDAY...Northwest winds 15 to 25 kt diminishing to 10 to 20 kt.
Chance of showers in the morning. Waves 3 to 5 ft.
.MONDAY NIGHT...Northwest winds 10 to 20 kt becoming west. Waves
2 to 4 ft subsiding to 1 to 2 ft.
.TUESDAY...West winds 10 to 20 kt becoming southwest. Waves 1 to
2 ft.
.WEDNESDAY...South winds to 30 kt. Chance of showers. Waves 4 to
7 ft occasionally to 9 ft.

$$

LMZ761-240330-
MAFOR 2321/
MICHIGAN NORTH 11520 12720 14620 11620. Chance of showers
Saturday. Waves 1 to 3 feet tonight. Waves 2 to 4 feet Saturday.

MICHIGAN SOUTH 12620 14720 12620. Waves 2 to 4 feet building to 3
to 5 feet tonight. Waves 3 to 5 feet subsiding to 2 to 4 feet
Saturday.

$$

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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