Great Lakes Forecast
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000
FZUS63 KLOT 220830
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
230 AM CST Mon Jan 22 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 29.4 inches over the Kansas City area
early this morning will cross Lake Michigan tonight, then
continue across southern Quebec Tuesday evening. A broad ridge of
high pressure of 30.3 inches over the Plains Tuesday night will
move across the western Great Lakes Wednesday and to the northeast
U.S. on Friday, strengthening to 30.7 inches as it does so.
Another low of 29.4 inches will develop in lee of the northern
Rockies Thursday night, moving to near James Bay by Saturday
morning.

LMZ261-362-364-366-563-565-221645-
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-
230 AM CST Mon Jan 22 2018

TWO RIVERS WI TO MANISTEE MI NORTH...

...GALE WARNING IN EFFECT FROM 9 AM CST THIS MORNING THROUGH
TUESDAY AFTERNOON...

.TODAY...Northeast winds 15 to 25 kt increasing to gales to 40
kt. Patchy fog. Chance of rain showers early this morning and then
rain and snow showers. Waves 4 to 6 ft occasionally to 8 ft
building to 8 to 12 ft occasionally to 16 ft.
.TONIGHT...Northeast gales to 40 kt diminishing to 35 kt. Wintry
mix. Waves 8 to 12 ft occasionally to 16 ft.
.TUESDAY...North gales to 40 kt diminishing to gales to 35 kt.
Chance of snow in the morning. Waves 8 to 12 ft occasionally to
16 ft subsiding to 7 to 10 ft occasionally to 13 ft.
.TUESDAY NIGHT...North winds to 30 kt diminishing to 15 to 20 kt.
Waves 6 to 9 ft occasionally to 12 ft subsiding to 3 to 5 ft.
.WEDNESDAY...North winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 2 to 4 ft subsiding to 1 to 3 ft.
.WEDNESDAY NIGHT...West winds 5 to 10 kt becoming southwest.
Waves 1 to 2 ft.
.THURSDAY...South winds 10 to 20 kt. Waves 1 to 3 ft.
.FRIDAY...South winds to 30 kt. Waves 6 to 9 ft occasionally to
12 ft.

$$

LMZ080-567-669-671-673-675-777-779-868-870-872-874-876-878-221645-
Lake Michigan from Michigan City IN to St. Joseph MI 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 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 Pentwater to Manistee MI 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-
230 AM CST Mon Jan 22 2018

TWO RIVERS WI TO MANISTEE MI SOUTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL 9 PM CST THIS EVENING...
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY
AFTERNOON...

.TODAY...East winds 15 to 25 kt increasing to 30 kt and then
becoming southeast 15 to 25 kt. Areas of dense fog. Rain showers
with a chance of thunderstorms this morning... then rain showers
this afternoon. Waves 3 to 5 ft building to 5 to 8 ft
occasionally to 10 ft.
.TONIGHT...Southeast winds 15 to 20 kt becoming southwest 15 to 25
kt late in the evening...then becoming northwest gales to 35 kt
late. Areas of dense fog in the evening. Rain showers likely with
slight chance of thunderstorms in the evening...then rain and snow
overnight. Waves 4 to 7 ft occasionally to 9 ft building to 8 to
12 ft occasionally to 16 ft late.
.TUESDAY...Northwest gales to 40 kt diminishing to gales to
35 kt. Chance of snow in the morning...then chance of snow
showers in the afternoon. Waves 10 to 14 ft occasionally to 18 ft
subsiding to 8 to 11 ft occasionally to 14 ft.
.TUESDAY NIGHT...Northwest winds to 30 kt diminishing to 10 to
20 kt overnight. Waves 7 to 10 ft occasionally to 13 ft subsiding
to 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt. Waves 3 to 5 ft
subsiding to 2 to 4 ft.
.WEDNESDAY NIGHT...West winds 10 to 15 kt becoming southwest.
Waves 1 to 3 ft.
.THURSDAY...South winds 10 to 20 kt. Waves 1 to 3 ft.
.FRIDAY...South winds to 30 kt. Waves 5 to 8 ft occasionally to
10 ft.

$$

LMZ761-221645-
MAFOR 2210/
MICHIGAN NORTH...Gale Warning in effect...10133 11143 12157 19257
13157 12157. Patchy fog today. Chance of rain showers early this
morning. Wintry mix tonight. Waves 4 to 6 ft occasionally to 8 ft
building to 8 to 12 ft occasionally to 16 ft today. Waves 8 to 12
ft occasionally to 16 ft tonight.

MICHIGAN SOUTH...Gale Warning in effect...11234 11244 11344 11334
11324 11324 11536 11647 19757. Rain showers today through this
evening. Chance of thunderstorms early this morning. Waves 3 to 5
ft building to 5 to 8 ft occasionally to 10 ft today. Waves 4 to
7 ft occasionally to 9 ft building to 7 to 10 ft occasionally to
13 ft tonight.

$$

RC

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

Graphical marine forecasts are available online at:
weather.gov/greatlakes


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