179
FZUS53 KLOT 180137
NSHLOT
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
837 PM CDT FRI APR 17 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>742-180915-
WINTHROP HARBOR TO WILMETTE HARBOR IL-
WILMETTE HARBOR TO NORTHERLY ISLAND IL-
NORTHERLY ISLAND TO CALUMET HARBOR IL-
837 PM CDT FRI APR 17 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY EVENING
..TORNADO WATCH 131 IN EFFECT UNTIL 11 PM CDT THIS EVENING
REST OF TONIGHT
SOUTH WINDS 20 TO 25 KT BECOMING WEST LATE.
SHOWERS AND THUNDERSTORMS THIS EVENING, THEN SHOWERS AND A CHANCE
OF THUNDERSTORMS AFTER MIDNIGHT. SOME THUNDERSTORMS MAY BE SEVERE
WITH DAMAGING WINDS AND WATERSPOUTS. WAVES 3 TO 5 FT SUBSIDING TO
2 TO 4 FT.
SATURDAY
NORTHWEST WINDS 20 TO 25 KT BECOMING WEST. SLIGHT
CHANCE OF SHOWERS IN THE MORNING. WAVES 2 TO 4 FT.
SATURDAY NIGHT
WEST WINDS 15 TO 20 KT DIMINISHING TO 10 TO
15 KT. PARTLY CLOUDY IN THE EVENING, THEN BECOMING MOSTLY CLEAR.
WAVES 1 TO 3 FT.
SUNDAY
WEST WINDS 10 TO 15 KT BECOMING NORTHWEST 15 TO 20 KT
IN THE AFTERNOON. SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON.
WAVES 1 TO 2 FT.
LMZ743>745-180915-
CALUMET HARBOR IL TO GARY IN-GARY TO BURNS HARBOR IN-
BURNS HARBOR TO MICHIGAN CITY IN-
837 PM CDT FRI APR 17 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY EVENING
..TORNADO WATCH 131 IN EFFECT UNTIL 11 PM CDT THIS EVENING
REST OF TONIGHT
SOUTH WINDS 20 TO 25 KT BECOMING SOUTHWEST
LATE. SHOWERS AND THUNDERSTORMS THIS EVENING, THEN SHOWERS WITH
A CHANCE OF THUNDERSTORMS AFTER MIDNIGHT. SOME THUNDERSTORMS MAY
BE SEVERE WITH DAMAGING WINDS AND WATERSPOUTS. WAVES 2 TO 4 FT.
SATURDAY
NORTHWEST WINDS 20 TO 25 KT. CHANCE OF SHOWERS IN THE
MORNING. WAVES 3 TO 5 FT.
SATURDAY NIGHT
NORTHWEST WINDS 15 TO 20 KT BECOMING WEST 10
TO 15 KT. PARTLY CLOUDY IN THE EVENING THEN CLEARING. WAVES 2 TO
4 FT.
SUNDAY
WEST WINDS 10 TO 20 KT BECOMING NORTHWEST IN THE
AFTERNOON. MOSTLY SUNNY IN THE MORNING, THEN BECOMING MOSTLY
CLOUDY. WAVES 1 TO 3 FT.
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