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
890
FZUS63 KMKX 200203
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
903 PM CDT Wed Sep 19 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 30.2 inches over Ontario and the northern Great
Lakes will gradually shift into Quebec tonight. Low pressure of
29.5 inches will develop over the Central Plains tonight and then
lift into the Upper Mississippi Valley Thursday evening. The low
will track across the Upper Great Lakes Thursday night while
dragging a strong cold front across the lake. High pressure of
30.3 inches will spread across the Upper Mississippi Valley and
Great Lakes Region through Saturday.

LMZ261-362-364-366-563-565-567-868-200930-
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-
903 PM CDT Wed Sep 19 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WATCH IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY
EVENING...

.REST OF TONIGHT...East winds 5 to 10 kt increasing to 10 to
15 kt. Scattered showers this evening, then scattered showers
with isolated thunderstorms overnight. Waves 1 to 2 ft.
.THURSDAY...Southeast winds 10 to 20 kt increasing to 30 kt.
Showers with a chance of thunderstorms in the morning, then
chance of showers and thunderstorms in the afternoon. Waves 3 to
5 ft.
.THURSDAY NIGHT...South winds to 30 kt increasing to gales to 35
kt during the evening, then becoming southwest gales to 40 kt
overnight. Chance of showers and thunderstorms. Waves 5 to 8 ft
occasionally to 10 ft building to 10 to 14 ft occasionally to 18
ft.
.FRIDAY...West gales to 40 kt becoming northwest gales to 35 kt.
Waves 10 to 14 ft occasionally to 18 ft subsiding to 6 to 9 ft
occasionally to 12 ft.
.FRIDAY NIGHT...North winds to 30 kt diminishing to 10 to 20 kt.
Waves 5 to 8 ft occasionally to 10 ft.
.SATURDAY...Southeast winds 10 to 15 kt veering to southwest
10 to 20 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.SUNDAY...Northeast winds 10 to 15 kt becoming east 10 to 20 kt.
Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-200930-
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-
903 PM CDT Wed Sep 19 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Northeast winds 10 to 15 kt becoming southeast
10 to 20 kt. Scattered showers this evening, then scattered
showers and thunderstorms overnight. Waves 2 to 4 ft.
.THURSDAY...Southeast winds 10 to 20 kt becoming south. Chance of
showers and thunderstorms in the morning. Waves 2 to 4 ft building
to 3 to 5 ft.
.THURSDAY NIGHT...South winds to 30 kt becoming southwest. A few
gale force gusts to 35kt possible. Waves 5 to 8 ft occasionally
to 10 ft building to 7 to 10 ft occasionally to 13 ft.
.FRIDAY...West winds to 30 kt becoming northwest. Gales to 35 kt
possible. Waves 6 to 9 ft occasionally to 12 ft.
.FRIDAY NIGHT...North winds to 30 kt becoming northeast 10 to
20 kt. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to
7 ft occasionally to 9 ft.
.SATURDAY...East winds 10 to 20 kt becoming southeast 5 to 10 kt.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.SUNDAY...East winds 10 to 15 kt. Waves 1 ft or less.

$$
LMZ761-200930-
MAFOR 2003/
MICHIGAN NORTH 12200 12216 11316 11310 11326 11430. Scattered
showers late this evening. Chance of showers and thunderstorms
Thursday evening. Waves 1 to 3 ft overnight. Waves 2 to 4 ft
building to 3 to 5 ft Thursday. Waves 4 to 7 ft occasionally to 9
ft Thursday evening.

MICHIGAN SOUTH 11210 11310 12316 13410 11420. Scattered showers
and thunderstorms late this evening. Chance of showers and
scattered thunderstorms Thursday morning. Waves 2 to 4 ft
overnight. Waves 2 to 4 ft building to 3 to 5 ft Thursday. Waves 4
to 6 ft occasionally to 8 ft Thursday evening.

$$


Boxell

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