FZUS63 KDTX 201337 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 937 AM EDT Sat Jun 20 2026 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 ridge of high pressure, 29.90 inches, builds in through the morning which will support lighter winds. The next low pressure system, 29.60 inches, will arrive late tomorrow into Monday morning, bringing renewed rain and thunderstorm chances along with elevated winds speeds across the southern Great Lakes. LCZ460-202145- Lake St Clair- 937 AM EDT Sat Jun 20 2026 .REST OF TODAY...West winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. Partly sunny. A chance of light showers in the afternoon. A chance of thunderstorms late in the afternoon. Waves 2 feet or less. .TONIGHT...Northwest winds 10 to 15 knots diminishing to 5 to 10 knots in the late evening and overnight. Mostly clear. A chance of showers and thunderstorms early in the evening. Waves 2 feet or less. .SUNDAY...Northwest winds 5 to 10 knots early in the morning becoming light and variable...then becoming south 5 to 10 knots early in the afternoon. Partly sunny. Waves 2 feet or less. .SUNDAY NIGHT...Southeast winds 5 to 10 knots increasing to 10 to 15 knots by midnight...then becoming east 15 to 20 knots after midnight. Cloudy with showers likely. Waves 2 feet or less. .MONDAY...Northeast winds 15 to 20 knots becoming north 10 to 15 knots in the evening. Partly sunny with a chance of light showers...then mostly clear in the evening. Waves 1 to 3 feet. .TUESDAY...Northeast winds 10 to 15 knots. Mostly clear. Waves 2 feet or less. .WEDNESDAY...Southeast winds 5 to 10 knots. Mostly clear. A chance of showers and thunderstorms. Waves 2 feet or less. $$ MANN Experimental modernized open lake forecast is available online at weather.gov/dtx/glftablesc Graphical marine forecasts are available at weather.gov/greatlakes