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
771
FZUS63 KLOT 191340
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
840 AM CDT Thu Apr 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...Low pressure of 29.6 inches will move off the mid
Atlantic coast today, while high pressure of 30.4 inches drifts
east across the northern and central Plains. This high will move
into the western Great Lakes region Friday, and will linger into
the weekend. Low pressure averaging 29.5 inches will travel from
Saskatchewan to Hudson Bay Saturday night through Monday evening.

LMZ261-362-364-366-563-565-567-868-192130-
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-
840 AM CDT Thu Apr 19 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...North winds 15 to 25 kt diminishing to 10 to 20
kt this afternoon. Waves 7 to 10 ft occasionally to 13 ft
subsiding to 4 to 6 ft occasionally to 8 ft.
.TONIGHT...North winds 10 to 20 kt becoming northwest 5 to 10 kt
overnight. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.FRIDAY...West winds less than 10 kt becoming southwest. Waves
1 to 2 ft.
.FRIDAY NIGHT...Southwest winds 5 to 10 kt. Waves 1 ft or less.
.SATURDAY...Southwest winds 5 to 10 kt. Waves nearly calm.
.SATURDAY NIGHT...South winds less than 10 kt. Waves nearly calm.
.SUNDAY...South winds 5 to 10 kt. Waves nearly calm.
.MONDAY...South winds 10 to 15 kt becoming southwest. Waves 1 to
3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-192130-
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-
840 AM CDT Thu Apr 19 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...North winds 20 to 25 kt easing to 15 to 20 kt by
late afternoon. A few gusts to 30 kt this morning. Waves 8 to 11
ft occasionally to 14 ft subsiding to 6 to 9 ft occasionally to 12
ft.
.TONIGHT...North winds 10 to 20 kt diminishing to 5 to 10 kt.
Waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft.
.FRIDAY...Northwest winds 5 to 10 kt becoming variable. Waves 1
to 3 ft.
.FRIDAY NIGHT...Variable winds 5 to 10 kt becoming southeast.
Waves 1 ft or less.
.SATURDAY...East winds less than 10 kt becoming variable. Waves
nearly calm.
.SATURDAY NIGHT...Northeast winds 5 to 10 kt becoming east. Waves
1 ft or less.
.SUNDAY...East winds 5 to 10 kt increasing to 10 to 15 kt. Waves
1 ft or less.
.MONDAY...East winds 10 to 15 kt becoming northeast 5 to 10 kt.
Waves 1 to 2 ft.

$$
LMZ761-192130-
MAFOR 1915/
MICHIGAN NORTH 12830 14820 11700 11600. Waves 7 to 10 ft
occasionally to 13 ft subsiding to 4 to 6 ft occasionally to 8 ft
this afternoon. Waves subsiding to 2 to 4 ft tonight and to 1 to
3 ft by Friday morning.

MICHIGAN SOUTH 12830 19840 12820 12810 11800 11700. Waves 8 to 11
ft occasionally to 14 ft subsiding to 6 to 9 ft occasionally to
12 ft this afternoon and to 2 to 4 ft overnight. Waves subsiding
to 1 to 3 ft Friday morning.

$$

Ratzer

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.