| NWS Forecast for: Northerly Island to Calumet Harbor IL (LMZ742) Issued by: National Weather Service Chicago, IL Last Update: 404 AM CST Fri Dec 5 2025 |  |
Today: Southwest winds 15 to 20 kt increasing to 20 to 25 kt. Mostly cloudy. Waves 2 to 4 ft. Tonight: Southwest winds 20 to 25 kt becoming west 15 to 20 kt overnight. Chance of snow and patchy freezing drizzle. Waves 2 to 4 ft subsiding to 1 to 3 ft. Saturday: Northwest winds 10 to 15 kt. Mostly cloudy. Waves 1 to 2 ft. Saturday Night: West winds around 5 to 10 kt. Slight chance of snow in the evening, then snow likely overnight. Waves 1 to 2 ft. | |
| Zone Forecast: Northerly Island to Calumet Harbor IL (LMZ742) | |
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