| NWS Forecast for: Northerly Island to Calumet Harbor IL (LMZ742) Issued by: National Weather Service Chicago, IL Last Update: 319 PM CDT Tue Apr 1 2025 |  |
Tonight: East winds 20 to 25 kt increasing to 35 kt gales overnight. Showers and thunderstorms developing late this evening. Waves 3 to 5 ft building to 8 to 11 ft occasionally to 14 ft. Wednesday: Southeast gales to 35 kt gradually diminishing to 20 to 25 kt during the morning, then becoming southwest gales to 35 kt during the afternoon. Occasional showers and thunderstorms, most numerous in the morning. Waves 8 to 11 ft occasionally to 14 ft subsiding to 4 to 7 ft occasionally to 9 ft. Wednesday Night: Southwest winds to 30 kt diminishing to 15 to 20 kt overnight. Slight chance of showers and thunderstorms in the evening. Waves 3 to 5 ft subsiding to 1 to 2 ft. Thursday: West winds 10 to 20 kt. Becoming mostly cloudy. Waves 1 to 2 ft. | |
| Zone Forecast: Northerly Island to Calumet Harbor IL (LMZ742) | |
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