


Great Lakes Forecast
Issued by NWS
Issued by NWS
485 FZUS63 KDTX 230124 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 924 PM EDT Fri Aug 22 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...High pressure, 30.10 inches, will break down into Saturday. A cold front then brings showers and a few thunderstorms to the region with time. A cooler airmass 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. LCZ460-230930- Lake St Clair- 924 PM EDT Fri Aug 22 2025 .REST OF TONIGHT...South winds 5 to 10 knots. Mostly clear. Waves 2 feet or less. .SATURDAY...Southwest winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. Partly sunny. A chance of. A chance of waterspouts late in the afternoon. Waves 2 feet or less. .SATURDAY NIGHT...West winds 10 to 15 knots. Mostly cloudy becoming partly cloudy in the late evening and early morning becoming clear. A chance of showers and thunderstorms early in the evening. Waves 2 feet or less. .SUNDAY...West winds 5 to 10 knots increasing to 10 to 15 knots early in the afternoon. Mostly sunny. Waves 2 feet or less. .SUNDAY NIGHT...West winds 10 to 15 knots becoming northwest 15 to 20 knots in the late evening and early morning...then becoming west 10 to 15 knots after midnight. Mostly clear. Waves 2 feet or less. .MONDAY...Northwest winds 10 to 15 knots. Sunny in the morning becoming mostly clear. Waves 2 feet or less. .TUESDAY...North 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. $$ SC Experimental modernized open lake forecast is available online at weather.gov/dtx/glftablesc Graphical marine forecasts are available at weather.gov/greatlakes