Great Lakes Forecast
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000
FZUS63 KLOT 212203
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
503 PM CDT Fri Jul 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...A weak ridge over Lake Michigan will move into the
eastern Great Lakes this evening. Low pressure of 29.6 inches will
move over the southern end of the lake Saturday night, and then
move over the eastern Great Lakes Sunday. An expansive 30.2 inch
high will then spread over the northern and western Great Lakes
Monday night and Tuesday.

LMZ261-362-364-366-563-565-567-868-220315-
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-
503 PM CDT Fri Jul 21 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Southeast winds 10 to 15 kt. Chance of showers and
thunderstorms. Waves 1 to 3 ft.
.SATURDAY...Northeast winds 10 to 15 kt. Showers and
thunderstorms likely in the morning...then slight chance of
showers and thunderstorms in the afternoon. Waves 1 to 3 ft.
.SATURDAY NIGHT...Northeast winds 10 to 15 kt veering to south.
Chance of showers and thunderstorms. Waves 1 to 2 ft.
.SUNDAY...West winds 10 to 15 kt veering to north 10 to 20 kt.
Chance of showers in the morning...then chance of showers and
thunderstorms in the afternoon. Waves 1 to 2 ft.
.SUNDAY NIGHT...North winds 15 to 25 kt. Waves 1 to 3 ft.
.MONDAY...North winds 15 to 25 kt. Waves 2 to 4 ft.
.MONDAY NIGHT...Northeast winds 10 to 20 kt becoming southeast
10 to 15 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft overnight.
.TUESDAY...South winds 10 to 20 kt. Waves 1 to 2 ft.
.WEDNESDAY...West winds 10 to 20 kt. Waves 1 to 3 ft.

$$

LMZ669-671-673-870-872-874-876-878-220315-
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 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-
503 PM CDT Fri Jul 21 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH TO WIND POINT WI TO HOLLAND
MI...

.TONIGHT...Southeast winds increasing to 10 to 20 kt. Showers and
thunderstorms. Waves 1 to 3 ft.
.SATURDAY...South winds 10 to 20 kt backing to north 10 to 15 kt.
Showers and thunderstorms likely in the morning...then slight
chance of showers and thunderstorms in the afternoon. Waves 1 to
3 ft.
.SATURDAY NIGHT...North winds 10 to 15 kt backing to west. Waves
1 to 3 ft.
.SUNDAY...West winds 10 to 15 kt. Waves 1 to 3 ft.
.SUNDAY NIGHT...North winds 15 to 25 kt. Waves 1 to 3 ft.
.MONDAY...North winds 15 to 25 kt. Waves 3 to 5 ft.
.MONDAY NIGHT...Northeast winds 10 to 20 kt becoming east 10 to
15 kt. Waves 3 to 5 ft.
.TUESDAY...Southeast winds 10 to 20 kt. Waves 2 to 4 ft.
.WEDNESDAY...Southwest winds 10 to 20 kt becoming northwest 10 to
15 kt. Chance of showers. Waves 1 to 2 ft.

$$

LMZ080-675-777-779-220315-
Lake Michigan from Michigan City IN to St. Joseph MI 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-
503 PM CDT Fri Jul 21 2017

WIND POINT WI TO HOLLAND MI SOUTH...

...SEVERE THUNDERSTORM WATCH 429 IN EFFECT UNTIL MIDNIGHT CDT
TONIGHT...

.TONIGHT...Southeast winds increasing to 10 to 20 kt. Showers and
thunderstorms. Waves 1 to 3 ft.
.SATURDAY...South winds 10 to 20 kt backing to north 10 to 15 kt.
Showers and thunderstorms likely in the morning...then slight
chance of showers and thunderstorms in the afternoon. Waves 1 to
3 ft.
.SATURDAY NIGHT...North winds 10 to 15 kt backing to west. Waves
1 to 3 ft.
.SUNDAY...West winds 10 to 15 kt. Waves 1 to 3 ft.
.SUNDAY NIGHT...North winds 15 to 25 kt. Waves 1 to 3 ft.
.MONDAY...North winds 15 to 25 kt. Waves 3 to 5 ft.
.MONDAY NIGHT...Northeast winds 10 to 20 kt becoming east 10 to
15 kt. Waves 3 to 5 ft.
.TUESDAY...Southeast winds 10 to 20 kt. Waves 2 to 4 ft.
.WEDNESDAY...Southwest winds 10 to 20 kt becoming northwest 10 to
15 kt. Chance of showers. Waves 1 to 2 ft.

$$
LMZ761-220315-
MAFOR 2121 AMD/
MICHIGAN NORTH 14310 11219 12110. Chance of showers and
thunderstorms early this evening. Chance of showers and
thunderstorms late Saturday. Waves 1 to 3 feet.

MICHIGAN SOUTH...Severe Thunderstorm Watch in effect...12310
13329 12429 11610. Waves 1 to 3 feet.

$$


Rodriguez

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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