543
FZUS53 KLOT 170853
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
353 AM CDT Tue Jun 17 2025

For waters within 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 waves, along with the
average height of the highest 10 percent of the waves which will
occasionally be encountered.

LMZ740>742-171515-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
353 AM CDT Tue Jun 17 2025

.TODAY...South winds 10 to 15 kt becoming southwest. Chance of
showers and thunderstorms in the afternoon. Waves 1 to 2 ft.
.TONIGHT...Southwest winds 5 to 10 kt becoming south overnight.
Showers and thunderstorms likely in the evening, then chance of
showers and thunderstorms overnight. Waves 1 ft or less.
.WEDNESDAY...South winds 10 to 15 kt increasing to 15 to 25 kt.
Showers likely and a chance of thunderstorms in the morning, then
showers with thunderstorms likely in the afternoon. Waves around
1 ft building to 1 to 3 ft.
.WEDNESDAY NIGHT...West winds 15 to 20 kt diminishing to 10 to
15 kt. Chance of showers and thunderstorms in the evening, then
slight chance of showers and thunderstorms overnight. Waves 1 to
3 ft.

$$

LMZ743>745-171515-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
353 AM CDT Tue Jun 17 2025

.TODAY...South winds around 10 kt becoming southwest 10 to 15 kt.
Slight chance of showers and thunderstorms in the afternoon.
Waves around 1 ft.
.TONIGHT...Southwest winds 10 to 15 kt becoming south 5 to 10 kt
overnight. Showers and thunderstorms likely in the evening, then
chance of showers and thunderstorms overnight. Waves around 1 ft.
.WEDNESDAY...South winds 10 to 15 kt increasing to 15 to 25 kt.
Showers likely and a chance of thunderstorms in the morning, then
showers with thunderstorms likely in the afternoon. Waves around
1 ft building to 1 to 3 ft.
.WEDNESDAY NIGHT...Southwest winds 15 to 20 kt becoming west
10 to 15 kt. Chance of showers and thunderstorms in the evening,
then slight chance of showers overnight. Waves 1 to 3 ft.

$$

Ratzer