Great Lakes Forecast
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126
FZUS63 KLOT 220200
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
900 PM CDT Wed Jun 21 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...High pressure of 30.0 inches over the eastern Great
Lakes will continue to build east tonight as low pressure of 29.4
inches settles from northern Saskatchewan to just north of Lake
Winnipeg. This low will weaken to 29.5 inches as it slowly tracks
east to western Ontario Thursday evening. The low will then slowly
track east through Ontario Thursday night and Friday morning while
dragging an associated cold front across Lake Michigan. The cold
front will move into the Ohio Valley Friday evening as high
pressure of 30.1 inches builds across the middle Mississippi
Valley.

LMZ261-362-364-366-563-565-567-868-220915-
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-
900 PM CDT Wed Jun 21 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...South winds 10 to 15 kt increasing to 10 to
20 kt. Scattered showers and thunderstorms this evening...then
numerous showers and thunderstorms overnight. Waves 1 to 3 ft.
.THURSDAY...South winds 10 to 20 kt becoming southwest. Chance of
showers and thunderstorms. Waves 2 to 4 ft.
.THURSDAY NIGHT...Southwest winds 10 to 20 kt becoming northwest.
Showers and thunderstorms likely. Waves 3 to 5 ft.
.FRIDAY...West winds 10 to 20 kt. Waves 2 to 4 ft subsiding to
1 to 2 ft.
.FRIDAY NIGHT...Northwest winds 10 to 20 kt becoming west 15 to
25 kt. Waves 1 to 3 ft.
.SATURDAY...West winds 15 to 25 kt diminishing to 10 to 20 kt.
Chance of showers in the afternoon. Waves 1 to 3 ft.
.SATURDAY NIGHT...West winds 10 to 20 kt increasing to 15 to
25 kt. Waves 1 to 2 ft.
.SUNDAY...West winds 10 to 20 kt becoming northwest. Waves 1 to
2 ft.
.MONDAY...West winds 10 to 20 kt. Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-220915-
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-
900 PM CDT Wed Jun 21 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Southeast winds 10 to 15 kt becoming south 15
to 20 kt. Isolated showers and thunderstorms this evening...then
scattered showers and thunderstorms overnight. Waves 2 to 4 ft.
.THURSDAY...Southwest winds 15 to 25 kt becoming south 10 to
20 kt. Chance of showers and thunderstorms. Waves 3 to 5 ft.
.THURSDAY NIGHT...South winds 15 to 25 kt veering to northwest.
Chance of showers and thunderstorms in the evening... then
showers and thunderstorms likely overnight. Waves 3 to 5 ft.
.FRIDAY...Northwest winds 15 to 25 kt becoming west 10 to 20 kt.
Waves 2 to 4 ft subsiding to 1 to 3 ft.
.FRIDAY NIGHT...West winds 10 to 20 kt becoming northwest 15 to
25 kt. Waves 2 to 4 ft.
.SATURDAY...West winds to 30 kt diminishing to 10 to 20 kt in the
afternoon. Waves 2 to 4 ft.
.SATURDAY NIGHT...West winds 15 to 25 kt becoming northwest.
Waves 2 to 4 ft.
.SUNDAY...West winds 10 to 20 kt becoming northwest. Waves 2 to
4 ft.
.MONDAY...Northwest winds 10 to 20 kt becoming west. Chance of
showers. Waves 1 to 3 ft.

$$
LMZ761-220915-
MAFOR 2203/
MICHIGAN NORTH 11410 12429 11420 13520 11529. Scattered showers
and thunderstorms late this evening. Chance of showers and
thunderstorms Thursday. Waves 1 to 3 feet tonight...2 to 4 feet
Thursday and 3 to 5 feet Thursday evening.

MICHIGAN SOUTH 11310 11320 11420 19430 13530 11420 11430.
Scattered showers and thunderstorms tonight. Chance of showers and
thunderstorms Thursday and Thursday evening. Waves 2 to 4 feet
overnight. Waves 3 to 5 feet Thursday and Thursday evening.

$$

RC

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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