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Below Normal Temperatures and Lake Effect Snow in the Eastern U.S.

Well below normal temperatures will continue across much of the eastern U.S. into Monday. Cold Weather Advisories have been issued from the Ohio Valley down to the northern Gulf Coast and southeast U.S. Heavy lake effect snow continues into Monday east of Lakes Erie and Ontario. Lake Effect Snow Warnings remain in effect. 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: 855 PM CST Sun Dec 14 2025		Print



Rest Of Tonight: Southwest winds 10 to 15 kt increasing to southwest gales to 35 kt towards daybreak. Partly cloudy early, then becoming mostly cloudy. Waves 1 to 3 ft building to 2 to 4 ft.

Monday: Southwest gales to 35 kt diminishing to 30 kt in the afternoon. Mostly cloudy. Waves 3 to 5 ft subsiding to 2 to 4 ft.

Monday Night: Southwest winds 10 to 15 kt. Partly cloudy. Waves 1 to 3 ft.

Tuesday: Southwest winds 10 to 20 kt increasing to 20 to 25 kt. Mostly cloudy. Waves 1 to 3 ft building to 2 to 4 ft.

wave heights are for ice free areas.






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

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