731
FZUS53 KLOT 152304
NSHLOT
NEARSHORE MARINE FORECAST
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
604 PM CDT SUN MAR 15 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.
LMZ740-160315-
WINTHROP HARBOR TO WILMETTE HARBOR IL-
604 PM CDT SUN MAR 15 2026
..GALE WARNING IN EFFECT THROUGH MONDAY EVENING
TONIGHT
NORTH GALES TO 35 KT BECOMING NORTHWEST AND INCREASING
TO 40 KT. RAIN WITH POSSIBLE FREEZING RAIN AND THUNDERSTORMS
LIKELY IN THE EVENING, THEN SNOW AFTER MIDNIGHT. WAVES 3 TO 5 FT
BUILDING TO 8 TO 12 FT OCCASIONALLY TO 16 FT.
MONDAY
NORTHWEST GALES TO 40 KT. SNOW. WAVES 8 TO 12 FT
OCCASIONALLY TO 16 FT SUBSIDING TO 7 TO 10 FT OCCASIONALLY TO 13
FT.
MONDAY NIGHT
NORTHWEST GALES TO 35 KT DIMINISHING TO 20 TO
25 KT. CHANCE OF SNOW IN THE EVENING. WAVES 6 TO 9 FT
OCCASIONALLY TO 12 FT SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO
9 FT.
TUESDAY
NORTHWEST WINDS 15 TO 20 KT BECOMING WEST 10 TO 15 KT
IN THE AFTERNOON. PARTLY CLOUDY. WAVES 3 TO 5 FT SUBSIDING TO
1 TO 3 FT.
LMZ741-742-160315-
WILMETTE HARBOR TO NORTHERLY ISLAND IL-
NORTHERLY ISLAND TO CALUMET HARBOR IL-
604 PM CDT SUN MAR 15 2026
..GALE WARNING IN EFFECT THROUGH MONDAY EVENING
TONIGHT
NORTH WINDS TO 30 KT BECOMING NORTHWEST AND INCREASING
TO 40 KT. RAIN AND SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING,
THEN SNOW LIKELY AND A CHANCE OF RAIN AFTER MIDNIGHT. WAVES 3 TO
5 FT BUILDING TO 8 TO 12 FT OCCASIONALLY TO 16 FT.
MONDAY
NORTHWEST GALES TO 40 KT. SNOW. WAVES 8 TO 12 FT
OCCASIONALLY TO 16 FT SUBSIDING TO 7 TO 10 FT OCCASIONALLY TO 13
FT.
MONDAY NIGHT
NORTHWEST GALES TO 35 KT DIMINISHING TO 20 TO 25
KT. CHANCE OF SNOW IN THE EVENING, THEN SLIGHT CHANCE OF SNOW
SHOWERS OVERNIGHT. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT SUBSIDING
TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
TUESDAY
NORTHWEST WINDS 15 TO 20 KT BECOMING WEST 10 TO 15 KT.
PARTLY CLOUDY. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO
2 TO 4 FT.
LMZ743>745-160315-
CALUMET HARBOR IL TO GARY IN-GARY TO BURNS HARBOR IN-
BURNS HARBOR TO MICHIGAN CITY IN-
604 PM CDT SUN MAR 15 2026
..SEVERE THUNDERSTORM WATCH 56 IN EFFECT UNTIL 1 AM CDT MONDAY
..GALE WARNING IN EFFECT THROUGH MONDAY EVENING
TONIGHT
NORTHWEST WINDS TO 30 KT BECOMING WEST AND INCREASING
TO 40 KT GALES. RAIN AND SLIGHT CHANCE OF THUNDERSTORMS IN THE
EVENING, THEN CHANCE OF RAIN AND SNOW AFTER MIDNIGHT. SOME
THUNDERSTORMS MAY BE SEVERE WITH DAMAGING WINDS. WAVES 3 TO 5 FT
BUILDING TO 8 TO 12 FT OCCASIONALLY TO 16 FT.
MONDAY
NORTHWEST GALES TO 40 KT. SNOW. WAVES 12 TO 16 FT
OCCASIONALLY TO 21 FT.
MONDAY NIGHT
NORTHWEST GALES TO 35 KT DIMINISHING TO 30 KT.
CHANCE OF SNOW IN THE EVENING, THEN CHANCE OF SNOW SHOWERS
OVERNIGHT. WAVES 12 TO 16 FT OCCASIONALLY TO 21 FT SUBSIDING TO
8 TO 12 FT OCCASIONALLY TO 16 FT.
TUESDAY
NORTHWEST WINDS 15 TO 25 KT BECOMING WEST 10 TO 20 KT.
FREEZING SPRAY IN THE MORNING. WAVES 6 TO 9 FT OCCASIONALLY TO
12 FT SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
KJB
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