| NWS Forecast for: Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake (LMZ777) Issued by: National Weather Service Chicago, IL Last Update: 855 AM CST Tue Dec 2 2025 |  |
| Rest Of Today: Northwest winds 10 to 15 kt becoming southwest 10 to 20 kt. Patchy dense fog through mid morning. Waves 2 to 4 ft. Tonight: Southwest winds 10 to 20 kt increasing to 30 kt. Chance of snow overnight. Waves 2 to 4 ft building to 7 to 10 ft occasionally to 13 ft. Wednesday: Southwest winds to 30 kt becoming northwest. Snow likely in the morning, then snow in the afternoon. Waves 8 to 12 ft occasionally to 16 ft subsiding to 6 to 9 ft occasionally to 12 ft. Wednesday Night: Northwest winds to 30 kt. Chance of snow in the evening. Freezing spray overnight. Waves 8 to 12 ft occasionally to 16 ft. Thursday: Northwest winds 15 to 25 kt becoming west 10 to 20 kt. Freezing spray in the morning. Waves 8 to 11 ft occasionally to 14 ft subsiding to 4 to 7 ft occasionally to 9 ft. Thursday Night: Southwest winds to 30 kt. Waves 4 to 7 ft occasionally to 9 ft building to 8 to 11 ft occasionally to 14 ft. Friday: Southwest winds to 30 kt. Chance of snow. Waves 8 to 11 ft occasionally to 14 ft. Saturday: Northwest winds 10 to 20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft. | |
| Zone Forecast: Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake (LMZ777) | |
Visit your local NWS office at: https://www.weather.gov/lot |