Hazardous marine condition(s):
Hazardous Weather Outlook
Storm Watch
LMZ740>743-280415-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
221 PM CST Sat Dec 27 2025
STORM WATCH IN EFFECT FROM SUNDAY EVENING THROUGH MONDAY
MORNING
TONIGHT
Southeast winds 15 to 20 kt diminishing to 10 to 15 kt
overnight. Patchy fog. Slight chance of rain in the evening, then
rain likely after midnight. Waves 3 to 5 ft subsiding to 2 to 4
ft.
SUNDAY
South winds 10 to 20 kt. Patchy dense fog in the
morning. Rain and slight chance of thunderstorms. Waves 2 to 4 ft
subsiding to 1 to 3 ft.
SUNDAY NIGHT
West gales to 35 kt increasing to storm force
winds to 50 kt in the evening. Rain and a slight chance of
thunderstorms in the early evening, then snow likely. Chance of
freezing spray overnight. Waves building to 5 to 8 ft
occasionally to 10 ft.
MONDAY
West gales to 45 kt becoming northwest to 35 kt.
Freezing Spray. Snow likely in the morning, then a slight chance
of snow in the afternoon. Waves 6 to 9 ft occasionally to 12 ft.
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