| NWS Forecast for: Northerly Island to Calumet Harbor IL (LMZ742) Issued by: National Weather Service Chicago, IL Last Update: 220 PM CST Sun Nov 30 2025 | |
Tonight: Northwest winds 15 to 25 kt diminishing to 10 to 15 kt. Mostly cloudy. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. Monday: West winds 10 to 15 kt becoming south in the afternoon. Snow in the afternoon. Waves 2 to 4 ft subsiding to 1 to 2 ft. Monday Night: South winds 10 to 15 kt becoming west overnight. Snow in the evening, then chance of snow overnight. Waves 1 to 2 ft. Tuesday: West winds 10 to 15 kt. Slight chance of snow showers in the afternoon. Waves 1 to 2 ft. | |
| Zone Forecast: Northerly Island to Calumet Harbor IL (LMZ742) | |
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