| NWS Forecast for: Winthrop Harbor to Wilmette Harbor IL (LMZ740) Issued by: National Weather Service Chicago, IL Last Update: 307 PM CDT Tue May 20 2025 |  |
Tonight: East winds 15 to 25 kt with gusts to 30 kt this evening diminishing to 10 to 20 kt late. Showers likely and a chance of thunderstorms in the evening, then showers likely and areas of drizzle after midnight. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft occasionally to 9 ft. Wednesday: Northeast winds 10 to 20 kt becoming northwest in the afternoon. Showers likely. Waves subsiding to 3 to 5 ft. Wednesday Night: Northwest winds 15 to 20 kt. Showers likely in the evening, then chance of showers overnight. Waves 3 to 5 ft. Thursday: Northwest winds 15 to 20 kt becoming north 15 to 25 kt. Slight chance of showers in the morning. Waves 3 to 6 ft occasionally to 8 ft. | |
| Zone Forecast: Winthrop Harbor to Wilmette Harbor IL (LMZ740) | |
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