Areas of Dangerous Heat and Heavy Rain with Possible Flooding This Week
Hot temperatures and high humidity are forecast to continue across much of northeast Texas into the mid-Mississippi Valley through this week. Heavy to excessive rainfall occurring at times through Saturday could bring areas of flooding across parts of the central Plains into the upper Midwest/Great Lakes, and Four Corners states. Read More >
| NWS Forecast for: Northerly Island to Calumet Harbor IL (LMZ742) Issued by: National Weather Service Chicago, IL Last Update: 327 AM CDT Wed Sep 16 2026 |  |
Early This Morning: North winds 10 to 15 kt becoming northeast by daybreak. Chance of showers and slight chance of thunderstorms. Waves 1 to 3 ft. Today: Northeast winds 10 to 15 kt. Slight chance of showers in the morning, then chance of showers in the afternoon. Waves 2 to 4 ft. Tonight: Northeast winds 10 to 15 kt becoming southeast 5 to 10 kt. Chance of showers and slight chance of thunderstorms. Waves 2 to 4 ft subsiding to 1 to 3 ft. Thursday: Northwest winds around 10 kt becoming north in the afternoon. Chance of showers in the morning. Waves 1 to 2 ft. Thursday Night: North winds around 10 kt becoming northeast. Mostly cloudy. Waves 1 to 3 ft. | |
| Zone Forecast: Northerly Island to Calumet Harbor IL (LMZ742) | |
Visit your local NWS office at: https://www.weather.gov/lot |