Areas Of Locally Heavy Snow And Rain Today

A strong low pressure system over the Great Lakes will produce locally heavy snow and rain, before reaching eastern Canada by tomorrow morning. Heavy snow is expected across the Upper Mississippi Valley and Great Lakes with the arrival of an Arctic air mass, while locally heavy rain is possible along and ahead of the associated cold front over the eastern Ohio Valley and southeastern New England.

Coastal Waters Forecast for Northerly Island to Calumet Harbor IL (LMZ742) (Text-Only)
NWS Forecast for: Northerly Island to Calumet Harbor IL (LMZ742)
Issued by: National Weather Service Chicago, IL
Last Update: 248 PM CST Mon Dec 9 2019

Tonight: West winds to 30 kt. Occasional gale force gusts in the evening. Chance of rain in the evening. Waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft in the late evening and early morning, then subsiding to 3 to 5 ft late.

Tuesday: West winds 20 to 25 kt diminishing to 15 to 20 kt by late morning. Sunny. Waves 3 to 5 ft subsiding to 2 to 4 ft.

Tuesday Night: West winds 15 to 20 kt. Mostly clear. Waves 1 to 3 ft building to 2 to 4 ft after midnight.

Wednesday: Northwest winds 10 to 20 kt. Slight chance of snow in the morning. Waves 2 to 4 ft.

Zone Forecast: Northerly Island to Calumet Harbor IL (LMZ742)

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