Hazardous marine condition(s):
Hazardous Weather Outlook
Small Craft Advisory
Gale Warning
LMZ740>742-151515-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
315 AM CDT Thu Oct 15 2026
SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON
GALE WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE
FRIDAY NIGHT
TODAY
East winds 15 to 20 kt becoming southeast. Scattered
showers throughout the day. Waves 3 to 5 ft.
TONIGHT
South winds 15 to 25 kt becoming west to 30 kt with a
few gale force gusts to 35 kt. Showers in the evening. Waves 3 to
5 ft.
FRIDAY
Northwest winds to 30 kt becoming northerly gales to 40
kt in the afternoon. Numerous showers especially in the afternoon.
Slight chance of waterspouts in the afternoon. Waves 4 to 6 ft
occasionally to 8 ft quickly building to 7 to 10 ft occasionally
to 13 ft.
FRIDAY NIGHT
Northerly gales to 40 kt diminishing to 30 kt
after midnight. Scattered showers ending by midnight. Waves 12 to
14 ft occasionally to 18 ft.
$$