Severe Weather and Heavy Rain from the Mid-South to the Mid-Atlantic; Building Heat in the West

Severe thunderstorms may bring damaging winds, a couple of tornadoes, and heavy rain across portions of the Mid-Atlantic into the Mid-South. Severe storms may produce hail across the northern/central High Plains. Hazardous heat will linger across the southern U.S. and build across the West through mid-week. Fire weather concerns continue for Interior Alaska and the Four Corners region. Read More >

Coastal Waters Forecast for Winthrop Harbor to Wilmette Harbor IL (LMZ740) (Text-Only)
NWS Forecast for: Winthrop Harbor to Wilmette Harbor IL (LMZ740)
Issued by: National Weather Service Chicago, IL
Last Update: 913 AM CDT Mon Jun 22 2026




Rest Of Today: North winds 15 to 25 kt. Partly cloudy. Waves 4 to 6 ft occasionally to 8 ft.

Tonight: North winds 10 to 20 kt. Mostly clear. Waves 4 to 6 ft occasionally to 8 ft in the early evening subsiding to 2 to 4 ft.

Tuesday: North winds 10 to 15 kt becoming northeast in the afternoon. Mostly sunny in the morning, then becoming partly cloudy. Waves 2 to 4 ft subsiding to 1 to 3 ft.

Tuesday Night: Southeast winds around 5 kt becoming south overnight. Mostly cloudy. Waves 1 to 2 ft.







Zone Forecast: Winthrop Harbor to Wilmette Harbor IL (LMZ740)

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