| NWS Forecast for: Northerly Island to Calumet Harbor IL (LMZ742) Issued by: National Weather Service Chicago, IL Last Update: 217 PM CST Thu Jan 29 2026 | |
Tonight: Northwest winds 10 to 15 kt. Partly cloudy. Waves 1 to 2 ft. Friday: North winds 15 to 20 kt becoming northeast 15 to 25 kt by midday. Snow showers in the morning, then scattered snow showers in the afternoon. Waves 1 to 3 ft building to 4 to 6 ft occasionally to 8 ft. Friday Night: North winds 15 to 25 kt early becoming northwest and easing to 15 to 20 kt. Snow showers in the evening, then scattered snow showers overnight. Waves 4 to 7 ft occasionally to 9 ft. Saturday: North winds 10 to 20 kt. Numerous snow showers in the morning, then scattered snow showers in the afternoon. Waves 5 to 8 ft occasionally to 10 ft subsiding to 3 to 6 ft occasionally to 8 ft. wave heights are for ice free areas. | |
| Zone Forecast: Northerly Island to Calumet Harbor IL (LMZ742) | |
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