032
FZUS53 KLOT 201941
NSHLOT
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
241 PM CDT MON APR 20 2026
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>742-210600-
WINTHROP HARBOR TO WILMETTE HARBOR IL-
WILMETTE HARBOR TO NORTHERLY ISLAND IL-
NORTHERLY ISLAND TO CALUMET HARBOR IL-
241 PM CDT MON APR 20 2026
TONIGHT
EAST WINDS 10 TO 15 KT BECOMING SOUTHEAST EARLY THIS
EVENING, THEN BECOMING SOUTH AND INCREASING TO 15 TO 20 KT.
PARTLY CLOUDY IN THE EVENING, THEN BECOMING MOSTLY CLOUDY. WAVES 1
TO 3 FT BUILDING TO 2 TO 4 FT.
TUESDAY
SOUTHWEST WINDS 15 TO 25 KT. PARTLY CLOUDY. WAVES 2 TO
4 FT SUBSIDING TO 1 TO 3 FT.
TUESDAY NIGHT
WEST WINDS 10 TO 15 KT BECOMING NORTH OVERNIGHT.
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING. WAVES
1 TO 2 FT.
WEDNESDAY
NORTH WINDS AROUND 10 KT BECOMING NORTHEAST IN THE
AFTERNOON. PARTLY CLOUDY. WAVES 1 TO 2 FT.
LMZ743>745-210600-
CALUMET HARBOR IL TO GARY IN-GARY TO BURNS HARBOR IN-
BURNS HARBOR TO MICHIGAN CITY IN-
241 PM CDT MON APR 20 2026
TONIGHT
NORTHEAST WINDS 10 TO 15 KT EARLY, BECOMING SOUTH AND
INCREASING TO 15 TO 25 KT. MOSTLY CLEAR IN THE EVENING, THEN
BECOMING PARTLY CLOUDY. WAVES 1 TO 3 FT.
TUESDAY
SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST. SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. WAVES 1 TO
3 FT.
TUESDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KT BECOMING NORTHWEST
OVERNIGHT. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING.
WAVES 1 TO 2 FT.
WEDNESDAY
NORTH WINDS AROUND 10 KT. PARTLY CLOUDY. WAVES
AROUND 1 FT.
RATZER
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page