Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
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

000
FZUS63 KLOT 090300
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
900 PM CST Fri Dec 8 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...Low pressure of 29.7 inches over northern Wisconsin
will move across the center of Lake Michigan late tonight while
deepening 29.6 inches. The low will then lift through the eastern
Great Lakes Saturday afternoon and evening. A weak ridge of high
pressure averaging 30.0 inches will move across the lake Saturday
night. Another weak low pressure is expected to form near Lake
Superior Sunday morning and move to New England Monday morning as
yet another low forms over the upper midwest Sunday and moves
across the Great Lakes Monday.

LMZ261-362-364-563-091030-
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 Rock Island Passage to Sturgeon Bay WI-
900 PM CST Fri Dec 8 2017

STURGEON BAY WI TO POINT BETSIE MI NORTH...

.REST OF TONIGHT...Variable winds 10 to 15 kt becoming northeast
10 to 20 kt after midnight and increasing to 30 kt late. Snow
through early evening... then chance of snow overnight. Waves 2 to
4 ft building to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...Northeast winds to 30 kt becoming north. Chance of
snow in the morning...then slight chance of snow in the
afternoon. Waves 6 to 9 ft occasionally to 12 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt becoming west.
Chance of snow overnight. Waves 4 to 7 ft occasionally to 9 ft
subsiding to 3 to 5 ft.
.SUNDAY...West winds 10 to 20 kt becoming northwest. Chance of
snow in the morning. Waves 4 to 6 ft occasionally to 8 ft.
.SUNDAY NIGHT...Northwest winds 10 to 20 kt diminishing to 10 to
15 kt. Chance of snow. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.MONDAY...South winds 10 to 15 kt backing to northeast 10 to
20 kt. Snow likely in the morning...then chance of snow in the
afternoon. Waves 1 to 2 ft building to 2 to 4 ft.
.MONDAY NIGHT...North winds 15 to 25 kt increasing to 30 kt.
Chance of snow. Waves 4 to 7 ft occasionally to 9 ft building to
7 to 10 ft occasionally to 13 ft.
.TUESDAY...North winds to 30 kt. Chance of snow. Waves 7 to 10 ft
occasionally to 13 ft subsiding to 6 to 9 ft occasionally to
12 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt becoming west. Chance of
snow. Waves 2 to 4 ft.

$$

LMZ366-565-567-669-868-870-091030-
Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to
Mid Lake-
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 Sheboygan to Port Washington WI 5 NM offshore
to Mid Lake-
Lake Michigan from Pentwater to Manistee MI 5 NM offshore to Mid
Lake-
Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid
Lake-
900 PM CST Fri Dec 8 2017

STURGEON BAY WI TO POINT BETSIE MI SOUTH TO PORT WASHINGTON WI TO
WHITEHALL MI...

...GALE WARNING IN EFFECT FROM 6 AM CST SATURDAY THROUGH SATURDAY
AFTERNOON...

.REST OF TONIGHT...Southwest winds 15 to 20 kt becoming west
after midnight and then northwest 15 to 25 kt late. Snow. Waves 2
to 4 ft building to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...North gales to 35 kt increasing to gales to 45 kt...
then diminishing to gales to 35 kt late. Snow likely in the
morning...then chance of snow in the afternoon. Chance of
waterspouts. Waves 6 to 9 ft occasionally to 12 ft building to 8
to 12 ft occasionally to 16 ft.
.SATURDAY NIGHT...Northwest winds to 30 kt diminishing to 15 to
25 kt late in the evening...then becoming west 10 to 20 kt
overnight. Waves 8 to 11 ft occasionally to 14 ft subsiding to
4 to 6 ft occasionally to 8 ft.
.SUNDAY...West winds 15 to 25 kt becoming northwest 10 to 20 kt.
Waves 4 to 6 ft occasionally to 8 ft.
.SUNDAY NIGHT...Northwest winds 10 to 20 kt. Chance of snow
overnight. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.MONDAY...Southwest winds 10 to 20 kt veering to north. Chance of
snow in the morning...then snow likely in the afternoon. Waves
1 to 3 ft building to 2 to 4 ft.
.MONDAY NIGHT...North winds to 30 kt increasing to gales to
35 kt. Freezing spray. Snow likely. Waves 5 to 8 ft occasionally
to 10 ft building to 8 to 12 ft occasionally to 16 ft.
.TUESDAY...Northwest gales to 35 kt diminishing to 30 kt. Chance
of snow. Waves 8 to 12 ft occasionally to 16 ft.
.WEDNESDAY...West winds 10 to 20 kt. Chance of snow. Waves 3 to
5 ft subsiding to 2 to 4 ft.

$$

LMZ080-671-673-675-777-779-872-874-876-878-091030-
Lake Michigan from Michigan City IN to St. Joseph MI 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 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-
900 PM CST Fri Dec 8 2017

PORT WASHINGTON WI TO WHITEHALL MI SOUTH...

...GALE WARNING IN EFFECT FROM 6 AM CST SATURDAY THROUGH SATURDAY
EVENING...

.REST OF TONIGHT...Southwest winds to 30 kt becoming west late.
Snow likely through early evening...then snow overnight. Waves 4
to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft.
.SATURDAY...Northwest gales to 35 kt becoming north gales to
45 kt. A few storm force gusts to 50 kt possible in the afternoon.
Snow likely in the morning...then chance of snow in the
afternoon. Chance of waterspouts. Waves 6 to 9 ft occasionally to
12 ft building to 12 to 16 ft occasionally to 21 ft.
.SATURDAY NIGHT...Northwest gales to 35 kt diminishing to 15 to
25 kt late in the evening...then becoming west 10 to 20 kt
overnight. Chance of snow in the evening. Waves 10 to 14 ft
occasionally to 18 ft subsiding to 6 to 9 ft occasionally to 12
ft.
.SUNDAY...West winds to 30 kt diminishing to 15 to 25 kt. Chance
of snow in the afternoon. Waves 4 to 7 ft occasionally to 9 ft.
.SUNDAY NIGHT...Northwest winds 10 to 20 kt becoming west. Chance
of snow. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft.
.MONDAY...Southwest winds 10 to 20 kt becoming west 15 to 25 kt.
Chance of snow in the morning...then chance of snow and rain in
the afternoon. Waves 1 to 3 ft building to 3 to 5 ft.
.MONDAY NIGHT...Northwest winds to 30 kt increasing to gales to
35 kt. Snow likely. Waves 6 to 9 ft occasionally to 12 ft
building to 10 to 14 ft occasionally to 18 ft.
.TUESDAY...Northwest gales to 35 kt. Snow likely. Waves 10 to
14 ft occasionally to 18 ft.
.WEDNESDAY...West winds 10 to 20 kt. Chance of snow. Waves 4 to
6 ft occasionally to 8 ft subsiding to 3 to 5 ft.

$$
LMZ761-091030-
MAFOR 0904/
MICHIGAN NORTH...Gale Warning in effect Sturgeon Bay WI to Point
Betsie MI...11917 19527 11837 11147 13850 11840 11730. Chance of
snow Saturday morning. Waves 2 to 4 feet building to 4 to 6 feet
occasionally to 8 feet overnight. Waves 8 to 11 feet occasionally
to 14 feet building to 8 to 12 feet occasionally to 16 feet
Saturday. Waves 7 to 10 feet occasionally to 13 feet subsiding to
5 to 8 feet occasionally to 10 feet Saturday evening.

MICHIGAN SOUTH...Gale Warning in effect...12547 11647 11757 11867
19877 11860 19870 11760 11740. Chance of snow Saturday afternoon
and Saturday evening. Waves 5 to 8 feet occasionally to 10 feet
subsiding to 4 to 7 feet occasionally to 9 feet overnight. Waves 7
to 10 feet occasionally to 13 feet building to 12 to 16 feet
occasionally to 21 feet Saturday. Waves 10 to 14 feet occasionally
to 18 feet subsiding to 8 to 12 feet occasionally to 16 feet
Saturday evening.

$$

RC

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.