


Great Lakes Forecast
Issued by NWS
Issued by NWS
991 FZUS63 KDTX 231334 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 934 AM EDT Sat Aug 23 2025 Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS...A cold front brings showers and a few thunderstorms to the region today and tonight. A cooler airmass then settles over the Great Lakes to close out the weekend, with some lake effect showers and the potential for a few waterspouts, mainly Monday and Tuesday. LCZ460-232145- Lake St Clair- 934 AM EDT Sat Aug 23 2025 .REST OF TODAY...Southwest winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. Mostly cloudy. A chance of showers and thunderstorms late in the afternoon. A chance of waterspouts late in the afternoon. Waves 2 feet or less. .TONIGHT...West winds 10 to 15 knots. A chance of waterspouts early in the evening. Partly cloudy with a chance of showers and thunderstorms early in the evening...then mostly clear in the late evening and overnight. Waves 2 feet or less. .SUNDAY...West winds 5 to 10 knots increasing to 10 to 15 knots early in the afternoon. Sunny until late afternoon becoming partly sunny. Waves 2 feet or less. .SUNDAY NIGHT...West winds 10 to 15 knots. Mostly clear. Waves 2 feet or less. .MONDAY...Northwest winds 10 to 15 knots. Sunny with a chance of light showers in the morning...then partly cloudy with a chance of light showers in the afternoon and evening. A chance of waterspouts in the afternoon and evening. Waves 2 feet or less. .TUESDAY...Northwest winds 10 to 15 knots. Mostly clear. Waves 2 feet or less. .WEDNESDAY...Southwest winds 5 to 10 knots. Clear. Waves 2 feet or less. $$ JA Experimental modernized open lake forecast is available online at weather.gov/dtx/glftablesc Graphical marine forecasts are available at weather.gov/greatlakes