Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Graphics & Text | 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
512
FZUS63 KLOT 260750
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
250 AM CDT Wed Jul 26 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 30.2 inches across the Northeast
U.S. will move slowly east through Thursday. Meanwhile, low
pressure of 29.7 inches across the central Plains today will move
to central Illinois by daybreak Thursday, and then to the Mid-
Atlantic by early Friday. This will assist a cold front down the
lake late tonight and into Thursday morning. High pressure of 30.2
inches will then build southeast across Lake Michigan on late
Friday night into Saturday, then slowly inch south into early next
week.

LMZ261-362-364-366-563-565-567-868-261530-
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 AM CDT Wed Jul 26 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...South winds to 30 kt becoming southwest late this morning
and then diminishing to 15 to 25 kt this afternoon. Chance of
showers and thunderstorms. Waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 6 ft occasionally to 8 ft this afternoon.
.TONIGHT...Southwest winds 10 to 20 kt becoming west 10 to 15 kt
late in the evening...then veering to northeast overnight. Chance
of showers and thunderstorms. Waves 3 to 5 ft subsiding to 2 to 4
ft.
.THURSDAY...Northeast winds 10 to 20 kt increasing to 15 to 25
kt early in the afternoon. Waves 2 to 4 ft building to 4 to 6 ft
occasionally to 8 ft.
.THURSDAY NIGHT...Northeast winds 15 to 25 kt. Waves 4 to 6 ft
occasionally to 8 ft.
.FRIDAY...Northeast winds 15 to 25 kt. Waves 3 to 6 ft
occasionally to 8 ft.
.FRIDAY NIGHT...Northeast winds 15 to 25 kt becoming north 10 to
20 kt. Waves subsiding to 2 to 4 ft.
.SATURDAY...North winds 10 to 15 kt becoming northwest. Waves
1 to 3 ft.
.SUNDAY...Southwest winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-261530-
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 AM CDT Wed Jul 26 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Southeast winds 15 to 20 kt becoming south after sunrise.
Chance of showers and thunderstorms, mainly this afternoon. Waves
3 to 5 ft.
.TONIGHT...South winds 10 to 20 kt becoming southwest 10 to 15 kt
late in the evening, then backing to northeast 10 to 15 kt
overnight. Showers and thunderstorms likely. Waves 2 to 4 ft.
.THURSDAY...Northeast winds 10 to 15 kt becoming north 15 to
25 kt in the afternoon. Chance of showers and thunderstorms in
the morning. Waves 2 to 4 ft building to 4 to 7 ft occasionally
to 9 ft.
.THURSDAY NIGHT...Northeast winds 15 to 25 kt with occasional
gusts to 30 kt. Waves 5 to 8 ft occasionally to 10 ft.
.FRIDAY...Northeast winds 10 to 20 kt becoming north to 30 kt in
the afternoon. Waves 4 to 7 ft occasionally to 9 ft.
.FRIDAY NIGHT...Northeast winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 4 to 6 ft occasionally to 8 ft.
.SATURDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.
.SUNDAY...Northwest winds 10 to 15 kt diminishing to 5 to 10 kt.
Waves 1 to 2 ft.

$$

LMZ761-261530-
MAFOR 2609/
MICHIGAN NORTH 12440 11540 12530 11520 11610 11810. Chance of
showers and thunderstorms. Waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 6 ft occasionally to 8 ft this afternoon,
further subsiding to 2 to 4 ft by overnight.

MICHIGAN SOUTH 11320 14420 11429 11519 11719. Chance of showers
and thunderstorms this afternoon. Waves 3 to 5 ft today subsiding
to 2 to 4 ft early this evening.

$$

MTF

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.