991
FZUS53 KLOT 212008
NSHLOT
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
308 PM CDT FRI AUG 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>742-220315-
WINTHROP HARBOR TO WILMETTE HARBOR IL-
WILMETTE HARBOR TO NORTHERLY ISLAND IL-
NORTHERLY ISLAND TO CALUMET HARBOR IL-
308 PM CDT FRI AUG 21 2026
...SEVERE THUNDERSTORM WATCH 610 IN EFFECT UNTIL 10 PM CDT THIS
EVENING...
TONIGHT
SOUTH WINDS 10 TO 15 KT BECOMING WEST LATE. SHOWERS
AND THUNDERSTORMS LIKELY IN THE EVENING, THEN CHANCE OF SHOWERS
AND THUNDERSTORMS AFTER MIDNIGHT. SOME THUNDERSTORMS MAY BE
SEVERE WITH DAMAGING WINDS AND LARGE HAIL IN THE EVENING. WAVES
1 TO 3 FT. WIND AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.
SATURDAY
NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH.
SCATTERED SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON. WAVES 2 TO 4 FT.
SATURDAY NIGHT
NORTHWEST WINDS 10 TO 15 KT BECOMING NORTH.
MOSTLY CLEAR. WAVES 2 TO 4 FT.
SUNDAY
NORTHWEST WINDS 10 TO 15 KT BECOMING NORTH. MOSTLY
SUNNY. WAVES 2 TO 4 FT.
LMZ743-744-220315-
CALUMET HARBOR IL TO GARY IN-GARY TO BURNS HARBOR IN-
308 PM CDT FRI AUG 21 2026
...SEVERE THUNDERSTORM WATCH 610 IN EFFECT UNTIL 10 PM CDT THIS
EVENING...
TONIGHT
SOUTH WINDS 10 TO 15 KT BECOMING WEST LATE. SHOWERS
AND THUNDERSTORMS LIKELY IN THE EVENING, THEN CHANCE OF SHOWERS
AND THUNDERSTORMS AFTER MIDNIGHT. SOME THUNDERSTORMS MAY BE
SEVERE WITH DAMAGING WINDS AND LARGE HAIL IN THE EVENING. WAVES
1 TO 3 FT. WIND AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.
SATURDAY
NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH IN THE
AFTERNOON. SLIGHT CHANCE OF THUNDERSTORMS WITH ISOLATED SHOWERS
IN THE AFTERNOON. WAVES 2 TO 4 FT.
SATURDAY NIGHT
NORTHWEST WINDS 10 TO 15 KT BECOMING NORTH.
MOSTLY CLEAR IN THE EVENING, THEN BECOMING PARTLY CLOUDY. WAVES
2 TO 4 FT.
SUNDAY
NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH IN THE
AFTERNOON. MOSTLY SUNNY. WAVES 3 TO 5 FT.
LMZ745-220315-
BURNS HARBOR TO MICHIGAN CITY IN-
308 PM CDT FRI AUG 21 2026
TONIGHT
SOUTH WINDS 10 TO 15 KT BECOMING WEST LATE. SHOWERS
AND THUNDERSTORMS LIKELY IN THE EVENING, THEN CHANCE OF SHOWERS
AND THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 TO 3 FT. WIND AND
WAVES HIGHER IN AND NEAR THUNDERSTORMS.
SATURDAY
NORTHWEST WINDS 15 TO 20 KT. SLIGHT CHANCE OF
THUNDERSTORMS WITH ISOLATED SHOWERS IN THE AFTERNOON. WAVES 3
TO 5 FT.
SATURDAY NIGHT
NORTHWEST WINDS 15 TO 20 KT BECOMING NORTH.
SLIGHT CHANCE OF SHOWERS OVERNIGHT. WAVES 3 TO 5 FT.
SUNDAY
NORTHWEST WINDS 15 TO 20 KT BECOMING NORTH. MOSTLY
SUNNY. WAVES 3 TO 6 FT OCCASIONALLY TO 8 FT. A SMALL CRAFT
ADVISORY WILL LIKELY BE NEEDED.
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