593
FZUS53 KLOT 311440 AAA
NSHLOT
NEARSHORE MARINE FORECAST...UPDATED
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
940 AM CDT TUE MAR 31 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.
LMZ740-312115-
WINTHROP HARBOR TO WILMETTE HARBOR IL-
940 AM CDT TUE MAR 31 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING
REST OF TODAY
SOUTH WINDS 20 TO 25 KT SHIFTING NORTH THIS
AFTERNOON. SHOWERS AND THUNDERSTORMS LIKELY. WAVES 2 TO 4 FT.
TONIGHT
NORTH WINDS 20 TO 25 KT. RAIN SHOWERS LIKELY AND A
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN CHANCE OF SHOWERS
OVERNIGHT. WAVES 3 TO 5 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO
10 FT.
WEDNESDAY
NORTHEAST WINDS 20 TO 25 KT. CHANCE OF SHOWERS.
WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
WEDNESDAY NIGHT
NORTHEAST WINDS 20 TO 25 KT BECOMING EAST.
RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT.
LMZ741-742-312115-
WILMETTE HARBOR TO NORTHERLY ISLAND IL-
NORTHERLY ISLAND TO CALUMET HARBOR IL-
940 AM CDT TUE MAR 31 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING
...SEVERE THUNDERSTORM WATCH 78 IN EFFECT UNTIL 5 PM CDT THIS
AFTERNOON...
REST OF TODAY
SOUTHWEST WINDS TO 30 KT SHIFTING NORTH 20 TO
25 KT THIS AFTERNOON. SHOWERS AND THUNDERSTORMS LIKELY. WAVES 2
TO 4 FT.
TONIGHT
NORTH WINDS 20 TO 25 KT. RAIN SHOWERS LIKELY AND A
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN CHANCE OF SHOWERS
OVERNIGHT. WAVES 3 TO 5 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO
10 FT.
WEDNESDAY
NORTHEAST WINDS 20 TO 25 KT. CHANCE OF SHOWERS.
WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
WEDNESDAY NIGHT
NORTHEAST WINDS 20 TO 25 KT BECOMING EAST.
RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT.
LMZ743>745-312115-
CALUMET HARBOR IL TO GARY IN-GARY TO BURNS HARBOR IN-
BURNS HARBOR TO MICHIGAN CITY IN-
940 AM CDT TUE MAR 31 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING
...SEVERE THUNDERSTORM WATCH 78 IN EFFECT UNTIL 5 PM CDT THIS
AFTERNOON...
REST OF TODAY
SOUTHWEST WINDS TO 30 KT SHIFTING NORTH 20 TO
25 KT LATE THIS AFTERNOON. SHOWERS AND THUNDERSTORMS LIKELY.
WAVES 2 TO 4 FT.
TONIGHT
NORTH WINDS 20 TO 25 KT. RAIN SHOWERS AND A CHANCE OF
THUNDERSTORMS IN THE EVENING, THEN SHOWERS LIKELY OVERNIGHT.
WAVES 3 TO 5 FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
WEDNESDAY
NORTHEAST WINDS 20 TO 25 KT DIMINISHING TO 15 TO
20 KT. RAIN SHOWERS LIKELY. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
WEDNESDAY NIGHT
EAST WINDS 15 TO 20 KT IN THE EVENING. RAIN
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS. WAVES 3 TO 5 FT.
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