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 >

Coastal Waters Forecast for Wilmette Harbor to Northerly Island IL (LMZ741) (Text-Only)
NWS Forecast for: Wilmette Harbor to Northerly Island IL (LMZ741)
Issued by: National Weather Service Chicago, IL
Last Update: 932 PM CDT Fri Oct 17 2025
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Rest Of Tonight: South winds 15 to 25 kt. Showers likely a chance of thunderstorms late. Waves 2 to 4 ft.

Saturday: Southwest winds 15 to 20 kt. Showers likely and a chance of thunderstorms in the morning, then chance of showers and slight chance of thunderstorms in the afternoon. Waves 1 to 3 ft.

Saturday Night: South winds 10 to 15 kt becoming west and increasing to 20 to 25 kt overnight. Showers likely and a chance of thunderstorms in the evening, then showers and slight chance of thunderstorms overnight. Waves 1 to 2 ft building to 2 to 4 ft.

Sunday: Northwest gales to 35 kt. Showers likely in the morning, then slight chance of showers in the afternoon. Waves quickly building to 4 to 7 ft occasionally to 9 ft.







Zone Forecast: Wilmette Harbor to Northerly Island IL (LMZ741)

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