Coastal Waters Forecast for Northerly Island to Calumet Harbor IL (LMZ742) (Text-Only)
NWS Forecast for: Northerly Island to Calumet Harbor IL (LMZ742)
Issued by: National Weather Service Chicago, IL
Last Update: 418 AM CDT Tue May 21 2024




Today: East winds 5 to 10 kt becoming south and increasing to 30 kt by early afternoon. Mostly cloudy in the morning, then becoming partly cloudy. Waves around 1 ft building to 1 to 3 ft.

Tonight: South winds to 30 kt with occasional gale force gusts to 35 kt becoming southwest after midnight, then diminishing to 15 to 25 kt by sunrise. A period of showers and thunderstorms late in the evening. Some thunderstorms may be severe with wind gusts over 50 kt. Waves 2 to 4 ft.

Wednesday: Southwest winds 10 to 20 kt becoming west. Partly cloudy in the morning then clearing. Waves 1 to 3 ft.

Wednesday Night: West winds 10 to 15 kt diminishing to 5 to 10 kt. Mostly clear. Waves 1 to 2 ft.







Zone Forecast: Northerly Island to Calumet Harbor IL (LMZ742)

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