


Great Lakes Forecast
Issued by NWS
Issued by NWS
221 FZUS63 KDTX 171406 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 1006 AM EDT Thu Apr 17 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, 30.20 inches, drifts across the Great Lakes today leading to favorable marine conditions. The next low pressure system organizes upstream and is set to bring showers and thunderstorms to the area Friday through the weekend. LCZ460-172215- Lake St Clair- 1006 AM EDT Thu Apr 17 2025 .REST OF TODAY...Southeast winds 5 to 10 knots becoming south 10 to 15 knots late in the afternoon. Mostly sunny. Waves 2 feet or less. .TONIGHT...Southeast winds 10 to 15 knots becoming south 15 to 20 knots early in the morning. Mostly cloudy. A chance of light showers after midnight. Waves 1 to 3 feet. .FRIDAY...South winds 15 to 20 knots. Partly sunny. A chance of light showers in the morning. Waves 1 to 3 feet. .FRIDAY NIGHT...Southwest winds 15 to 20 knots. Mostly cloudy with a chance of showers and thunderstorms. Waves 1 to 3 feet. .SATURDAY...West winds 10 to 15 knots becoming northwest 5 to 10 knots in the evening. Mostly cloudy. Light showers in the morning. Waves 2 feet or less. .SUNDAY...East winds 10 to 15 knots. Partly cloudy. A chance of light rain. Waves 2 feet or less. .MONDAY...Southwest winds 15 to 20 knots. Partly cloudy. A chance of light rain. Waves 1 to 3 feet. $$ SC Experimental modernized open lake forecast is available online at weather.gov/dtx/glftablesc Graphical marine forecasts are available at weather.gov/greatlakes