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: Winthrop Harbor to Wilmette Harbor IL (LMZ740) Issued by: National Weather Service Chicago, IL Last Update: 256 AM CDT Sun Oct 19 2025 |  |
Today: Northwest gales to 35 kt. Rain ending during the late morning. Waves 4 to 7 ft occasionally to 9 ft building to 6 to 9 ft occasionally to 12 ft, then subsiding to 4 to 7 ft occasionally to 9 ft. Tonight: Northwest winds 15 to 25 kt becoming west 10 to 20 kt. Clear. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. Monday: Southwest winds 10 to 15 kt becoming south and increasing to 30 kt in the afternoon. Sunny. Waves 1 to 2 ft building to 4 to 6 ft occasionally to 8 ft. Monday Night: South winds to 30 kt becoming west 15 to 25 kt overnight. Scattered showers. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft. | |
| Zone Forecast: Winthrop Harbor to Wilmette Harbor IL (LMZ740) | |
Visit your local NWS office at: https://www.weather.gov/lot |