FZUS63 KDTX 201948 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 348 PM EDT Thu Mar 20 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...Cold front cleared to region to the east with strong northwest winds gusting to gales over the open waters of Lake Huron into this evening. High pressure around 30.00 inches will move back in tonight and will persist through Friday. The next cold front will sweep through Friday night. LCZ460-210400- Lake St Clair- 348 PM EDT Thu Mar 20 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING... .TONIGHT...Northwest winds 15 to 20 knots diminishing to 5 to 10 knots. Partly cloudy with a chance of light snow in the evening...then clear after midnight. Waves 2 feet or less. .FRIDAY...Southwest winds 5 to 10 knots increasing to 15 to 20 knots. Mostly sunny. Waves 2 feet or less. .FRIDAY NIGHT...Southwest winds 15 to 20 knots. Partly cloudy in the evening...then mostly cloudy with a chance of light rain after midnight. Waves 2 to 4 feet. .SATURDAY...Northwest winds 15 to 20 knots. Mostly cloudy in the morning becoming mostly sunny. Waves 1 to 3 feet. .SATURDAY NIGHT...Northwest winds 10 to 15 knots becoming northeast 5 to 10 knots in the late evening and early morning.. then veering to the east after midnight. Mostly clear. Waves 2 feet or less. .SUNDAY...Southeast winds 10 to 15 knots increasing to 15 to 20 knots in the afternoon and evening. Partly sunny in the morning. Light rain in the evening. Waves 1 to 3 feet. .MONDAY...West winds 20 to 25 knots. Partly cloudy. Light rain and a chance of light snow. Waves 1 to 3 feet. .TUESDAY...Northwest winds 15 to 20 knots. Partly cloudy. Waves 2 feet or less. $$ KDK Experimental modernized open lake forecast is available online at weather.gov/dtx/glftablesc Graphical marine forecasts are available at weather.gov/greatlakes