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
328
FZUS63 KLOT 231444
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
844 AM CST Fri Feb 23 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...Weak low pressure of 30.0 inches over the upper lakes
will move into Quebec today. High pressure of 30.4 inches over
the northern Plains this morning will move across the northern
lakes Saturday morning. Low pressure of 29.7 inches will develop
over the Southern Plains tonight...deepen rapidly...then lift
across Lake Superior Sunday at 29.0 inches. A 30.2 inch high will
build over the Central Plains Monday and move to the upper Ohio
Valley Tuesday.

LMZ261-362-364-366-563-565-567-868-232100-
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-
844 AM CST Fri Feb 23 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WATCH IN EFFECT FROM SATURDAY EVENING THROUGH LATE SUNDAY
NIGHT...

.REST OF TODAY...South winds 15 to 25 kt becoming west. Patchy
fog this morning. Wintry mix this morning. Waves 3 to 6 ft
occasionally to 8 ft.
.TONIGHT...West winds 15 to 25 kt becoming northwest 10 to 20
kt...then becoming north 10 to 15 kt late. Waves 3 to 5 ft
subsiding to 2 to 4 ft.
.SATURDAY...Northeast winds 10 to 20 kt becoming east 15 to 25
kt. Waves 2 to 4 ft.
.SATURDAY NIGHT...East winds to 30 kt becoming south gales to
40 kt overnight. Rain, chance of snow, light freezing rain and
light sleet in the evening...then rain overnight. Waves 5 to 8 ft
occasionally to 10 ft.
.SUNDAY...Southwest gales to 45 kt diminishing to gales to 40 kt.
Chance of rain in the morning. Waves 10 to 14 ft occasionally to
18 ft.
.SUNDAY NIGHT...Southwest gales to 40 kt becoming west to 30 kt
overnight. Waves 8 to 11 ft occasionally to 14 ft subsiding to
5 to 8 ft occasionally to 10 ft.
.MONDAY...Southwest winds 10 to 20 kt. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft.
.TUESDAY...Southwest winds 15 to 25 kt diminishing to 10 to 15 kt
in the afternoon. Waves 4 to 6 ft occasionally to 8 ft subsiding
to 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-232100-
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-
844 AM CST Fri Feb 23 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WATCH IN EFFECT FROM SATURDAY EVENING THROUGH LATE SUNDAY
NIGHT...

.REST OF TODAY...South winds 15 to 25 kt becoming west. Chance of
rain this morning. Waves 3 to 5 ft.
.TONIGHT...West winds 10 to 20 kt veering to northeast. Slight
chance of light freezing rain overnight. Waves 3 to 5 ft
subsiding to 2 to 4 ft.
.SATURDAY...East winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of rain and light freezing rain in the morning... then
chance of rain in the afternoon. Waves 2 to 4 ft building to 3 to
5 ft.
.SATURDAY NIGHT...Southeast gales to 35 kt veering to southwest
gales to 40 kt. Rain in the evening...then rain likely overnight.
Waves 6 to 9 ft occasionally to 12 ft.
.SUNDAY...West gales to 40 kt becoming southwest gales to 35 kt.
Waves 8 to 12 ft occasionally to 16 ft.
.SUNDAY NIGHT...Southwest gales to 35 kt becoming west to 30 kt.
Waves 5 to 8 ft occasionally to 10 ft.
.MONDAY...Southwest winds 10 to 20 kt. Waves 3 to 5 ft subsiding
to 2 to 4 ft.
.TUESDAY...Southwest winds 10 to 20 kt becoming south. Waves 3 to
5 ft subsiding to 1 to 3 ft.

$$
LMZ761-232100-
MAFOR 2316/
MICHIGAN NORTH 11437 19530 12630 11730 11720 11820 11110 11210.
Waves 3 to 6 ft occasionally to 8 ft today. Waves 3 to 5 ft
subsiding to 2 to 4 ft tonight. Waves 2 to 4 ft Saturday morning.

MICHIGAN SOUTH 11430 19530 12630 12720 11820 11120 11220. Chance
of rain this morning. Chance of light freezing rain Saturday
morning. Waves 3 to 5 ft today. Waves 3 to 5 ft subsiding to 2
to 4 ft tonight. Waves 2 to 4 ft Saturday morning.

$$

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.