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
000
FZUS63 KLOT 190113
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
813 PM CDT Wed Jul 18 2018

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 30.1 inches centered over the
Great Lakes will move to New England by Thursday. Low pressure of
29.7 inches over the northern Plains will deepen to 29.5 inches
as it slowly tracks to the Upper Mississippi Valley Thursday
night. This low will reach southern Lake Michigan by Friday night,
then slowly move southeast to the Ohio Valley through the
weekend.


LMZ261-362-364-366-563-565-567-868-190930-
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-
813 PM CDT Wed Jul 18 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Southwest winds 10 to 15 kt becoming south
after midnight. Waves 1 to 2 ft.
.THURSDAY...South winds 10 to 15 kt becoming southeast in the
afternoon and increasing to 10 to 20 kt late. Waves 1 to 3 ft.
.THURSDAY NIGHT...East winds 10 to 20 kt becoming southeast 15 to
25 kt after midnight. Chance of showers and thunderstorms
overnight. Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8
ft.
.FRIDAY...East winds 15 to 25 kt diminishing to 10 to 20 kt.
Chance of showers and thunderstorms. Waves 4 to 7 ft occasionally
to 9 ft.
.FRIDAY NIGHT...Northeast winds 10 to 20 kt diminishing to 10 to
15 kt. Chance of showers. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.SATURDAY...Northeast winds 10 to 20 kt. Chance of showers. Waves
1 to 3 ft.
.SATURDAY NIGHT...Northeast winds 10 to 20 kt. Chance of showers.
Waves 2 to 4 ft.
.SUNDAY...Northeast winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 3 to 5 ft.
.MONDAY...North winds 5 to 10 kt becoming northwest 10 to 15 kt.
Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-190930-
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-
813 PM CDT Wed Jul 18 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Northeast winds 10 to 15 kt veering to
southeast. Waves 1 to 2 ft.
.THURSDAY...Southeast winds 10 to 15 kt increasing to 10 to
20 kt by late morning. Slight chance of showers and thunderstorms
late in the afternoon. Waves 2 to 4 ft.
.THURSDAY NIGHT...Southeast winds 10 to 20 kt increasing to 15 to
25 kt by late evening. Chance of showers and thunderstorms in the
evening, then showers and thunderstorms likely overnight. Waves 2
to 4 ft building to 4 to 7 ft occasionally to 9 ft.
.FRIDAY...Southeast winds 15 to 25 kt. Showers and thunderstorms
likely. Waves 4 to 7 ft occasionally to 9 ft.
.FRIDAY NIGHT...Northeast winds 10 to 20 kt becoming north.
Chance of showers. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.SATURDAY...North winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of showers. Waves building to 3 to 5 ft.
.SATURDAY NIGHT...North winds 10 to 20 kt. Chance of showers.
Waves building to 3 to 6 ft occasionally to 8 ft.
.SUNDAY...North winds 10 to 20 kt becoming northeast. Chance of
showers. Waves 3 to 6 ft occasionally to 8 ft.
.MONDAY...Northeast winds 10 to 15 kt becoming north. Waves 2 to
4 ft.

$$
LMZ761-190930-
MAFOR 1903/
MICHIGAN NORTH 11510 14410 11310 12320. Waves 1 to 3 ft through
Thursday building to 2 to 4 ft early Thursday evening.

MICHIGAN SOUTH 11110 11210 12310 13320 11320. Chance of showers
and thunderstorms Thursday evening. Waves 1 to 2 ft tonight
building to 2 to 4 ft early Thursday morning, further building to
3 to 5 ft Thursday 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.