Marine and Coastal Impacts from Imelda; Unsettled Weather in the West
Swells and high surf from both Imelda and Humberto are expected to bring dangerous marine conditions and rip currents to much of the East Coast over the next several days. A series of Pacific frontal systems will bring waves of showers and thunderstorms to portions of northern California and the Pacific Northwest through midweek. Read More >
| 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: 911 AM CDT Tue Sep 30 2025 |  |
| Rest Of Today: Northeast winds 5 to 10 kt becoming north 10 to 15 kt. Waves 1 to 2 ft. Tonight: Northeast winds 10 to 20 kt becoming east. Waves 1 to 2 ft building to 3 to 5 ft. Wednesday: East winds 10 to 20 kt diminishing to 10 to 15 kt. Waves 3 to 5 ft subsiding to 1 to 3 ft. Wednesday Night: East winds 15 to 25 kt becoming southeast. Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. Thursday: Southeast winds 10 to 20 kt. Waves 4 to 6 ft occasionally to 8 ft. Thursday Night: Southeast winds 10 to 15 kt becoming south. Waves 2 to 4 ft. Friday: South winds 10 to 20 kt. Waves 2 to 4 ft. Saturday: Southwest winds 10 to 20 kt becoming south 15 to 25 kt. Waves 3 to 5 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 |