FZUS63 KDTX 070724 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 324 AM EDT Mon Apr 7 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...Low pressure, 29.70 inches, will move across northern Lake Huron this morning. Gales will develop behind this low as arctic air moves in behind this system. High pressure will expand into the region from the west late Tuesday. Low pressure is forecast to track across the Ohio Valley or southern Great Lakes Wednesday night into Thursday. LCZ460-071530- Lake St Clair- 324 AM EDT Mon Apr 7 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM EDT THIS MORNING THROUGH LATE TONIGHT... .TODAY...South winds 10 to 15 knots becoming southwest 15 to 20 knots in the late morning and early afternoon...then veering to the northwest with gusts to 30 knots late in the afternoon. Mostly sunny with a chance of light showers in the morning...then mostly cloudy with a chance of light rain and snow showers in the afternoon. Waves 1 to 3 feet. .TONIGHT...Northwest winds 15 to 20 knots with gusts to 30 knots increasing to 20 to 25 knots with gusts to 30 knots in the late evening and early morning...then diminishing to 15 to 20 knots early in the morning. Partly cloudy. A chance of light snow showers in the evening. Waves 1 to 3 feet. .TUESDAY...Northwest winds 15 to 20 knots diminishing to 10 to 15 knots early in the afternoon. Partly sunny. Waves 1 to 3 feet. .TUESDAY NIGHT...Northwest winds 10 to 15 knots diminishing to 5 to 10 knots in the late evening and overnight. Mostly clear. Waves 2 feet or less. .WEDNESDAY...Southwest winds 5 to 10 knots becoming southeast 10 to 15 knots in the evening. Partly sunny in the morning becoming mostly cloudy. A chance of light rain in the evening. Waves 2 feet or less. .THURSDAY...North winds 10 to 15 knots. Mostly cloudy with light rain likely. Waves 2 feet or less. .FRIDAY...North winds 10 to 15 knots. Partly cloudy. A chance of light rain. 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