


Great Lakes Forecast
Issued by NWS
Issued by NWS
621 FZUS63 KDTX 130153 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 953 PM EDT Sat Jul 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, 30.00 inches, will fill in over the Great Lakes and will hold through Tuesday. The next chance for more active weather will return by the midweek period as a pre- frontal trough and cold front move over the region. LCZ460-131000- Lake St Clair- 953 PM EDT Sat Jul 12 2025 .REST OF TONIGHT...Southwest winds 10 to 15 knots becoming west 5 to 10 knots after midnight. Mostly cloudy this evening becoming partly cloudy. Waves 2 feet or less. .SUNDAY...West winds 5 to 10 knots backing to the southwest in the afternoon. Mostly sunny. Waves 2 feet or less. .SUNDAY NIGHT...Northwest winds 5 to 10 knots. Mostly clear. Waves 2 feet or less. .MONDAY...West winds 5 to 10 knots backing to the south early in the afternoon. Sunny. Waves 2 feet or less. .MONDAY NIGHT...Southwest winds 5 to 10 knots. Clear. Waves 2 feet or less. .TUESDAY...Light and variable winds becoming south 5 to 10 knots in the afternoon and evening. Mostly clear. Waves 2 feet or less. .WEDNESDAY...South winds 10 to 15 knots. Partly cloudy. A chance of showers and thunderstorms. Waves 2 feet or less. .THURSDAY...Northwest winds 10 to 15 knots. Partly cloudy. Showers likely and a chance of thunderstorms. Waves 2 feet or less. $$ AA Experimental modernized open lake forecast is available online at weather.gov/dtx/glftablesc Graphical marine forecasts are available at weather.gov/greatlakes