


Great Lakes Forecast
Issued by NWS
Issued by NWS
048 FZUS63 KDTX 200133 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 933 PM EDT Tue Aug 19 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...Northeast wind prevails through Wednesday and Thursday as high pressure builds in across the northern Great Lakes and Tropical System Erin tracks offshore of the eastern seaboard. This high passes overhead Friday before the next cold front arrives on Saturday. LCZ460-200945- Lake St Clair- 933 PM EDT Tue Aug 19 2025 .REST OF TONIGHT...Northeast winds 5 to 10 knots increasing to 10 to 15 knots early in the morning. Mostly cloudy. Waves 2 feet or less. .WEDNESDAY...North winds 10 to 15 knots. Mostly cloudy until late afternoon becoming mostly sunny. Waves 1 to 3 feet. .WEDNESDAY NIGHT...Northeast winds 15 to 20 knots diminishing to 10 to 15 knots after midnight. Partly cloudy. Waves 1 to 3 feet. .THURSDAY...Northeast winds 10 to 15 knots. Mostly sunny. Waves 2 feet or less. .THURSDAY NIGHT...Northeast winds 10 to 15 knots diminishing to 5 to 10 knots after midnight. Mostly clear. Waves 2 feet or less. .FRIDAY...Northeast winds 5 to 10 knots in the morning becoming light and variable...then becoming southeast 5 to 10 knots in the evening. Clear. Waves 2 feet or less. .SATURDAY...West winds 10 to 15 knots. Mostly clear. Waves 2 feet or less. .SUNDAY...West winds 10 to 15 knots. Mostly clear. 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