National Weather Service United States Department of Commerce

Severe thunderstorms possible this evening and tonight

Large hail and damaging winds may occur from eastern Montana into North Dakota. Strong storms are also possible over the southern mid-Atlantic states. Hot weather continues across the southern Plains to Arizona.
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Last Update: 900 PM CDT THU JUL 24 2014

View Nearby Observations

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.

  • Tonight Variable winds less than 10 kt becoming south after midnight. Mostly clear. Waves 1 to 3 ft subsiding to 1 ft or less late.
  • Friday South winds 10 to 15 kt. Chance of showers and slight chance of thunderstorms...mainly in the afternoon. Waves 1 to 2 ft.
  • Friday Night South winds 10 to 15 kt. Showers and thunderstorms likely...mainly after midnight. Waves 1 to 3 ft.
  • Saturday West winds 10 to 15 kt. Partly sunny. Waves 1 to 3 ft.



Additional Forecasts and Information

Zone Area Forecast for Winthrop Harbor to Wilmette Harbor IL
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