Tracking Storm System Across the Eastern U.S.
A storm system will continue to produce widespread showers and thunderstorms as it progresses eastward across the central U.S. into the Northeast through the weekend. There are risks of severe thunderstorms and excessive rainfall on Saturday from the Ozarks into the mid-Mississippi River Valley with potential for damaging winds, large hail, tornadoes, and flash flooding. Read More >
| NWS Forecast for: Northerly Island to Calumet Harbor IL (LMZ742) Issued by: National Weather Service Chicago, IL Last Update: 1019 AM CDT Sat Oct 18 2025 |  |
Rest Of Today: Southwest winds 15 to 20 kt diminishing to 10 to 15 kt. A chance of showers and thunderstorms in the afternoon. waves 1 to 3 ft. Tonight: South winds 10 to 15 kt becoming west and increasing to 15 to 25 kt overnight. Showers and a chance of thunderstorms in the evening, then rain and slight chance of thunderstorms overnight. Waves 1 to 2 ft building to 2 to 4 ft. Sunday: Northwest gales to 35 kt. Rain in the morning, then chance of rain in the afternoon. Waves 5 to 8 ft occasionally to 10 ft. Sunday Night: Northwest winds to 30 kt becoming west and diminishing to 10 to 20 kt. Clear. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft. | |
| Zone Forecast: Northerly Island to Calumet Harbor IL (LMZ742) | |
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