


Great Lakes Forecast
Issued by NWS
Issued by NWS
596 FZUS63 KDTX 120746 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 346 AM EDT Mon May 12 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 of 30.40 inches slowly exits the Eastern Great Lakes this morning, allowing an extended period of light southeast winds through Wednesday. A large low pressure system lifting into the region will bring periods of showers and isolated thunderstorms Tuesday and Wednesday. LCZ460-121600- Lake St Clair- 346 AM EDT Mon May 12 2025 .TODAY...East winds 5 to 10 knots becoming southeast 10 to 15 knots late in the afternoon. Mostly sunny. Waves 2 feet or less. .TONIGHT...Southeast winds 5 to 10 knots. Mostly cloudy with a chance of light showers. Waves 2 feet or less. .TUESDAY...Southeast winds 5 to 10 knots becoming east 10 to 15 knots early in the afternoon. Mostly cloudy. A chance of light showers in the afternoon. Waves 2 feet or less. .TUESDAY NIGHT...East winds 10 to 15 knots diminishing to 5 to 10 knots after midnight. Mostly cloudy. A chance of light showers in the evening. Waves 2 feet or less. .WEDNESDAY...Southeast winds 5 to 10 knots. Mostly cloudy in the morning...then partly cloudy with a chance of light showers in the afternoon and evening. Waves 2 feet or less. .THURSDAY...Southeast winds 10 to 15 knots. Partly cloudy. Showers likely and a chance of thunderstorms. Waves 2 feet or less. .FRIDAY...Southwest winds 15 to 20 knots. Mostly clear. Showers likely and a chance of thunderstorms. Waves 1 to 3 feet. $$ AA Experimental modernized open lake forecast is available online at weather.gov/dtx/glftablesc Graphical marine forecasts are available at weather.gov/greatlakes