National Weather Service United States Department of Commerce

Unseasonably cold temperatures spreading into central U.S.

A strong cold front will usher a much colder air mass into the central and eastern U.S. for the end of the work week. Temperatures will be 10 to 20 degrees below average in some areas. Rain and snow will be possible across the Great Lakes on Friday as the system crosses the area. Heavy snow is possible in the central Appalachians Friday night.
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Last Update: 329 AM CDT FRI OCT 31 2014

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Winthrop Harbor to Wilmette Harbor IL

Marine Zone Forecast

WAVES ARE PROVIDED AS A RANGE OF SIGNIFICANT WAVE HEIGHTS...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES...ALONG WITH THE AVERAGE HEIGHT OF THE HIGHEST 10 PERCENT OF THE WAVES WHICH WILL OCCASIONALLY BE ENCOUNTERED.

  • Today Northwest gales to 40 kt becoming north to 45 kt in the late morning and afternoon. A few 50 kt storm force gusts possible midday. Scattered rain and snow showers. Waves 4 to 7 ft occasionally to 9 ft building to 14 to 18 ft occasionally to 23 ft by mid afternoon.
  • Tonight North gales to 40 kt easing to 30 kt overnight. Scattered snow showers. Waves subsiding to 12 to 16 ft occasionally to 20 ft after midnight.
  • Saturday North winds 15 to 25 kt diminishing to 10 to 20 kt during the afternoon. Chance of rain and snow showers in the morning. Waves 10 to 14 ft occasionally to 18 ft subsiding to 4 to 7 ft occasionally to 9 ft in the afternoon.
  • Saturday Night Northwest winds 10 to 15 kt becoming southwest 5 to 10 kt after midnight. Mostly clear. Waves 4 to 7 ft occasionally to 9 ft subsiding to around 1 ft after midnight.



Additional Forecasts and Information

Zone Area Forecast for Winthrop Harbor to Wilmette Harbor IL
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