928
FZUS53 KLOT 211413
NSHLOT
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
913 AM CDT TUE APR 21 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.
LMZ740-212115-
WINTHROP HARBOR TO WILMETTE HARBOR IL-
913 AM CDT TUE APR 21 2026
REST OF TODAY
SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST IN
THE AFTERNOON. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON. WAVES 2 TO 4 FT.
TONIGHT
WEST WINDS 10 TO 15 KT BECOMING NORTH OVERNIGHT.
PATCHY FOG IN THE EVENING, THEN AREAS OF FOG OVERNIGHT. WAVES
1 TO 2 FT.
WEDNESDAY
NORTH WINDS AROUND 10 KT BECOMING NORTHEAST IN THE
AFTERNOON. AREAS OF FOG IN THE MORNING, THEN PATCHY FOG IN THE
AFTERNOON. WAVES 1 TO 2 FT.
WEDNESDAY NIGHT
SOUTHEAST WINDS AROUND 10 KT BECOMING SOUTH
OVERNIGHT. PARTLY CLOUDY. WAVES 1 TO 2 FT.
LMZ741-742-212115-
WILMETTE HARBOR TO NORTHERLY ISLAND IL-
NORTHERLY ISLAND TO CALUMET HARBOR IL-
913 AM CDT TUE APR 21 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM CDT THIS AFTERNOON
REST OF TODAY
SOUTH WINDS 15 TO 20 KT BECOMING SOUTHWEST AND
INCREASING TO 20 TO 25 KT, THEN DIMINISHING TO 15 TO 20 KT LATE IN
THE AFTERNOON. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON. WAVES 1 TO 3 FT.
TONIGHT
SOUTHWEST WINDS 10 TO 15 KT BECOMING NORTHWEST
OVERNIGHT. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
EVENING. PATCHY FOG IN THE EVENING, THEN AREAS OF FOG OVERNIGHT.
WAVES 1 TO 2 FT.
WEDNESDAY
NORTH WINDS AROUND 10 KT BECOMING NORTHEAST IN THE
AFTERNOON. AREAS OF FOG IN THE MORNING, THEN PATCHY FOG IN THE
AFTERNOON. WAVES 1 TO 2 FT.
WEDNESDAY NIGHT
SOUTHEAST WINDS AROUND 10 KT BECOMING SOUTH
OVERNIGHT. MOSTLY CLOUDY IN THE EVENING, THEN BECOMING PARTLY
CLOUDY. WAVES 1 TO 2 FT.
LMZ743>745-212115-
CALUMET HARBOR IL TO GARY IN-GARY TO BURNS HARBOR IN-
BURNS HARBOR TO MICHIGAN CITY IN-
913 AM CDT TUE APR 21 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING
REST OF TODAY
SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST AND
INCREASING TO 20 TO 25 KT. CHANCE OF SHOWERS AND THUNDERSTORMS IN
THE AFTERNOON. WAVES 1 TO 3 FT.
TONIGHT
SOUTHWEST WINDS 10 TO 20 KT BECOMING NORTHWEST
OVERNIGHT. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING.
AREAS OF FOG OVERNIGHT. WAVES 1 TO 3 FT SUBSIDING TO AROUND 1 FT.
WEDNESDAY
NORTH WINDS AROUND 10 KT. AREAS OF FOG IN THE
MORNING. WAVES AROUND 1 FT.
WEDNESDAY NIGHT
EAST WINDS AROUND 10 KT BECOMING SOUTH
OVERNIGHT. PARTLY CLOUDY. WAVES AROUND 1 FT.
RATZER
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