Great Lakes Forecast
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298
FZUS63 KLOT 231343
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
843 AM CDT Mon Oct 23 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 29.9 inches is centered over the lower
Ohio Valley and another low of 29.5 inches is centered over
southern Manitoba. These lows will merge over Michigan today and
deepen rapidly to a strong 28.9 inch low by early Tuesday. The
low will meander over northern Michigan Tuesday then lift to
Quebec Wednesday and weaken. Low pressure of 29.4 inches will move
into the Dakotas Wednesday and across Lake Superior Thursday.

LMZ261-362-364-366-563-565-567-868-232145-
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-
843 AM CDT Mon Oct 23 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH TUESDAY
MORNING...
...STORM WARNING IN EFFECT FROM TUESDAY MORNING THROUGH LATE
TUESDAY NIGHT...
...GALE WARNING IN EFFECT FROM LATE TUESDAY NIGHT THROUGH
WEDNESDAY MORNING...

.REST OF TODAY...Variable winds 5 to 10 kt becoming northeast 10
to 20 kt early this afternoon and increasing to 15 to 25 kt late.
Chance of rain. Waves 1 to 2 ft building to 2 to 4 ft.
.TONIGHT...North winds to 30 kt increasing to gales to 35 kt in
the evening...then becoming northwest gales to 45 kt overnight.
Showers. Waves 4 to 7 ft occasionally to 9 ft building to 10 to
14 ft occasionally to 18 ft late.
.TUESDAY...Northwest gales to 45 kt increasing to storm force
winds to 50 kt. Rain showers. Waves 12 to 16 ft occasionally to
21 ft.
.TUESDAY NIGHT...Northwest storm force winds to 50 kt diminishing
to gales to 40 kt. Rain showers likely in the evening...then
chance of rain showers overnight. Waves subsiding to 10 to 14 ft
occasionally to 18 ft.
.WEDNESDAY...Northwest winds to 30 kt becoming west 10 to 20 kt
in the afternoon. Waves 8 to 11 ft occasionally to 14 ft
subsiding to 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY NIGHT...West winds 10 to 20 kt becoming south 15 to
25 kt. Waves 2 to 4 ft.
.THURSDAY...South winds to 30 kt becoming southwest. Waves 4 to
6 ft occasionally to 8 ft building to 5 to 8 ft occasionally to
10 ft.
.FRIDAY...Northwest gales to 35 kt diminishing to 30 kt. Chance
of rain showers. Waves 5 to 8 ft occasionally to 10 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-232145-
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-
843 AM CDT Mon Oct 23 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT FROM TUESDAY MORNING THROUGH WEDNESDAY
MORNING...

.REST OF TODAY...North winds 15 to 25 kt increasing to 30 kt
early this afternoon and becoming northwest late. Rain. Waves 4
to 7 ft occasionally to 9 ft building to 5 to 8 ft occasionally
to 10 ft.
.TONIGHT...Northwest winds to 30 kt becoming west. Showers likely
in the evening...then showers overnight. Waves 6 to 9 ft
occasionally to 12 ft.
.TUESDAY...West gales to 35 kt becoming northwest gales to 45 kt.
Rain showers. Waves 8 to 11 ft occasionally to 14 ft building to
12 to 16 ft occasionally to 21 ft late.
.TUESDAY NIGHT...Northwest gales to 45 kt diminishing to gales to
40 kt. Rain showers likely in the evening... then chance of rain
showers overnight. Waves 12 to 16 ft occasionally to 21 ft.
.WEDNESDAY...Northwest winds to 30 kt becoming west 15 to 25 kt.
Waves 8 to 12 ft occasionally to 16 ft subsiding to 5 to 8 ft
occasionally to 10 ft.
.WEDNESDAY NIGHT...West winds 10 to 20 kt becoming southwest
15 to 25 kt. Waves 3 to 5 ft.
.THURSDAY...Southwest winds to 30 kt. Waves 4 to 7 ft
occasionally to 9 ft building to 6 to 9 ft occasionally to 12 ft.
.FRIDAY...West gales to 35 kt diminishing to 30 kt. Chance of
rain showers. Waves 6 to 9 ft occasionally to 12 ft.

$$

&&STORM


LMZ761-232145-
MAFOR 2315/
MICHIGAN NORTH...Storm Warning in effect...11900 11120 11136
11846 11856 12766 11766 19776. Chance of rain today. Waves 1 to 2
feet building to 2 to 4 feet today. Waves 4 to 7 feet
occasionally to 9 feet building to 10 to 14 feet occasionally to
18 feet tonight. Waves building to 12 to 16 feet occasionally to
21 feet Tuesday morning.

MICHIGAN SOUTH...Gale Warning in effect...12836 14746 11646
11656. Waves 4 to 7 feet occasionally to 9 feet building to 5 to
8 feet occasionally to 10 feet today. Waves 6 to 9 feet
occasionally to 12 feet tonight. Waves 8 to 11 feet occasionally
to 14 feet Tuesday morning.

$$


KJB

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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