Heavy to Excessive Rains in The Four Corners Region and Midwest; Heat Persists in the South-Central U.S.
Repeated rounds of showers and thunderstorms could bring a flash flooding threat across the Four Corners region and from the mid-Mississippi Valley into the lower Great Lakes. Hot temperatures and high humidity will continue to challenge daily records from the Southern Plains to the lower Mississippi Valley. 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: 859 AM CDT Wed Sep 16 2026 | |
Rest Of Today: Northeast winds 10 to 15 kt increasing to 10 to 20 kt. Chance of showers and slight chance of thunderstorms through mid morning, then chance of showers this afternoon. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. Tonight: Northeast winds 10 to 20 kt becoming east 10 to 15 kt, then diminishing to 5 to 10 kt late. Chance of showers and slight chance of thunderstorms. Waves 2 to 4 ft subsiding to 1 to 3 ft. Thursday: Northeast winds 5 to 10 kt becoming north 10 to 15 kt. Chance of showers in the morning. Waves 1 to 2 ft. Thursday Night: North winds 10 to 15 kt becoming northeast 10 to 20 kt. Waves 1 to 3 ft. Friday: East winds 10 to 20 kt diminishing to 10 to 15 kt. Waves 2 to 4 ft. Friday Night: East winds 15 to 25 kt becoming southeast to 30 kt. Showers with a chance of thunderstorms. Waves 4 to 6 ft occasionally to 8 ft building to 7 to 10 ft occasionally to 13 ft. Saturday: Southeast winds to 30 kt. Showers with a chance of thunderstorms. Waves 8 to 11 ft occasionally to 14 ft subsiding to 7 to 10 ft occasionally to 13 ft. Sunday: Northeast winds to 30 kt. Chance of showers. Waves 6 to 9 ft occasionally to 12 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 |