Great Lakes Forecast
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000
FZUS63 KLOT 220141
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
841 PM CDT Mon May 21 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 29.9 inches across the middle
Mississippi Valley will move to southern Michigan by late tonight,
and to the eastern Great Lakes by Tuesday. High pressure of 30.1
inches will build over the Great Lakes Tuesday night and
Wednesday. Late in the week, low pressure of 29.5 inches will move
from the Upper Midwest into the Great Lakes.

LMZ261-362-364-366-563-565-567-868-220915-
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-
841 PM CDT Mon May 21 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...East winds 10 to 15 kt becoming northeast.
Patchy fog this evening, then areas of fog overnight. Chance of
rain showers this evening, then slight chance of rain showers
overnight. Waves 1 to 3 ft.
.TUESDAY...Northeast winds 10 to 15 kt becoming northwest. Patchy
fog in the morning. Slight chance of rain showers in the morning.
Waves 1 to 3 ft.
.TUESDAY NIGHT...West winds 5 to 10 kt becoming southwest. Waves
1 to 2 ft.
.WEDNESDAY...Southwest winds 10 to 15 kt. Waves 1 ft or less.
.WEDNESDAY NIGHT...Southwest winds 10 to 15 kt. Waves 1 ft or
less.
.THURSDAY...Southwest winds 10 to 15 kt becoming south 10 to
20 kt. Waves 1 to 3 ft.
.THURSDAY NIGHT...Southwest winds 10 to 20 kt. Chance of rain
showers and thunderstorms. Waves 1 to 3 ft.
.FRIDAY...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.
.SATURDAY...South winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-220915-
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-
841 PM CDT Mon May 21 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT TUESDAY...

.REST OF TONIGHT...East winds 10 to 20 kt backing to north 10 to
15 kt. Areas of dense fog this evening, then widespread dense fog
overnight. Chance of rain showers this evening, then slight
chance of rain showers overnight. Waves 2 to 4 ft subsiding to
1 to 3 ft.
.TUESDAY...Northwest winds 10 to 15 kt becoming north. Areas of
dense fog in the morning. Waves 1 to 3 ft.
.TUESDAY NIGHT...North winds 10 to 15 kt becoming northwest less
than 10 kt. Waves 1 to 2 ft.
.WEDNESDAY...Southwest winds 10 to 15 kt becoming south. Waves
1 ft or less.
.WEDNESDAY NIGHT...South winds 10 to 15 kt becoming southeast.
Waves 1 ft or less.
.THURSDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.
.THURSDAY NIGHT...South winds 10 to 20 kt becoming southwest.
Waves 1 to 3 ft.
.FRIDAY...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.
.SATURDAY...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.

$$
LMZ761-220915-
MAFOR 2203/
MICHIGAN NORTH 11210 12113 12110 11810 11710 11600. Chance of
showers late this evening. Waves 1 to 3 ft tonight and Tuesday.
Waves 1 to 2 ft Tuesday evening.

MICHIGAN SOUTH 11214 11114 11814 11714 11713 13810. Chance of
showers overnight. Waves 2 to 4 ft subsiding to 1 to 3 ft overnight.
Waves 1 to 3 ft Tuesday. Waves 1 to 2 ft Tuesday evening.

$$


JEE

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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