Severe Weather and Heavy Rain for the Plains and Mid-Atlantic; Building Heat in the West

Severe thunderstorms will remain possible in the Mid-Atlantic through Tuesday. Severe thunderstorms and heavy rain will also be possible in the central/southern Plains on Tuesday and Wednesday. Hazardous heat will linger across the southern U.S. and build across the West through mid-week. Hot and dry weather will create Elevated to Critical fire weather conditions in 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: 918 PM CDT Mon Jun 22 2026




Rest Of Tonight: North winds 10 to 15 kt. Clear. Waves 3 to 6 ft subsiding to 2 to 4 ft after midnight.

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: East winds around 10 kt becoming south overnight. Partly cloudy. Waves 1 to 2 ft.

Wednesday: South winds 10 to 15 kt. Slight chance of showers in the morning, then showers likely and a chance of thunderstorms in the afternoon. Waves 1 to 2 ft.







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

Visit your local NWS office at: https://www.weather.gov/lot