Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FZUS63 KLOT 201949
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
249 PM CDT Thu Jul 20 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 trough of low pressure averaging 29.9 inches over
the lake will weaken this evening. A weak high of 30.0 inches will
move over the lake tonight, and then shift over the eastern Great
Lakes Friday evening. Low pressure of 29.6 inches will move over
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.

LMZ261-362-364-366-563-565-567-868-210330-
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-
249 PM CDT Thu Jul 20 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Southwest winds 10 to 15 kt becoming variable 5 to 10
kt. Waves 1 ft or less.
.FRIDAY...South winds 5 to 10 kt increasing to 10 to 15 kt.
Slight chance of showers and thunderstorms in the afternoon.
Waves 1 ft or less.
.FRIDAY NIGHT...South winds 10 to 15 kt becoming southeast 15 to
25 kt. Chance of showers and thunderstorms. Waves 1 to 2 ft.
.SATURDAY...Southeast winds 10 to 20 kt becoming east 10 to
15 kt. Chance of showers and thunderstorms. Waves 1 to 2 ft.
.SATURDAY NIGHT...Northeast winds 10 to 15 kt becoming north.
Chance of showers and thunderstorms. Waves 1 to 2 ft.
.SUNDAY...North winds 10 to 15 kt increasing to 15 to 25 kt after
midnight. Chance of showers and thunderstorms. Waves 1 to 2 ft.
.SUNDAY NIGHT...Northeast winds 15 to 25 kt. Waves 2 to 4 ft
building to 3 to 5 ft.
.MONDAY...Northeast winds 15 to 25 kt. Waves 3 to 5 ft.
.TUESDAY...Northeast winds 5 to 10 kt backing to west. Waves 1 ft
or less.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-210330-
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-
249 PM CDT Thu Jul 20 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Variable winds 10 to 15 kt diminishing to 5 to 10 kt.
Waves 1 to 3 ft.
.FRIDAY...Southeast winds 5 to 10 kt increasing to 10 to 15 kt in
the afternoon. Slight chance of showers and thunderstorms in the
morning...then chance of showers and thunderstorms in the
afternoon. Waves 1 ft or less.
.FRIDAY NIGHT...Southeast winds 10 to 20 kt increasing to 15 to
25 kt. Showers and thunderstorms likely in the evening... then
showers and thunderstorms overnight. Waves 1 to 3 ft.
.SATURDAY...South winds 10 to 20 kt becoming southwest. Chance of
showers and thunderstorms. Waves 1 to 3 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt. Chance of showers
and thunderstorms in the evening. Waves 1 to 2 ft.
.SUNDAY...West winds 10 to 20 kt. Waves 1 to 3 ft.
.SUNDAY NIGHT...North winds 10 to 20 kt increasing to 15 to
25 kt after midnight. Waves 1 to 3 ft building to 3 to 5 ft.
.MONDAY...North winds 15 to 25 kt. Waves 3 to 5 ft.
.TUESDAY...East winds 10 to 15 kt becoming northeast. Waves 1 to
2 ft.

$$

LMZ761-210330-
MAFOR 2021/
MICHIGAN NORTH 11510 14900 12400 11410. Waves 1 foot or less.


MICHIGAN SOUTH 11910 14900 12300 11410. Chance of showers and
thunderstorms Friday. Waves 1 to 3 feet tonight. Waves 1 foot or
less Friday.

$$


JEE

Experimental modernized open lake forecast is available online at
weather.gov/lot/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.