| NWS Forecast for: Northerly Island to Calumet Harbor IL (LMZ742) Issued by: National Weather Service Chicago, IL Last Update: 256 AM CST Wed Nov 4 2026 |  |
Today: South winds to 30 kt easing to 20 to 25 kt early this morning, then becoming southwest by midday. Showers this morning, then a slight chance of showers in the afternoon. Waves 3 to 5 ft subsiding to 2 to 4 ft. Tonight: Southwest winds 20 to 25 kt. Mostly cloudy. Waves 2 to 4 ft. Thursday: Southwest winds 20 to 25 kt becoming west 15 to 20 kt in the afternoon. Slight chance of showers in the morning, then chance of showers in the afternoon. Waves 2 to 4 ft. Thursday Night: Northwest winds 15 to 25 kt becoming north at 20 to 25 kt. Showers likely in the evening, then chance of showers overnight. Waves 2 to 4 ft occasionally to 8 ft building to 6 to 9 ft occasionally to 12 ft. | |
| Zone Forecast: Northerly Island to Calumet Harbor IL (LMZ742) | |
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