


Great Lakes Forecast
Issued by NWS
Issued by NWS
548 FZUS63 KDTX 191345 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 945 AM EDT Sat Apr 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...Low pressure, 29.50 inches, continues to draw a frontal zone across the area early this morning before settling southeast of the area by mid-day. High pressure, 30.50 inches, then builds in from the northwest to support overall benign marine conditions through the weekend. The exception to this is northern Lake Huron where breezy northwest flow and elevated wave action exist for most of today. LCZ460-192145- Lake St Clair- 945 AM EDT Sat Apr 19 2025 .REST OF TODAY...West winds 10 to 15 knots becoming northwest 5 to 10 knots late in the afternoon. Mostly cloudy. Waves 2 feet or less. .TONIGHT...Northwest winds 5 to 10 knots veering to the north after midnight...then becoming northeast 10 to 15 knots early in the morning. Mostly cloudy this evening becoming partly cloudy. Waves 2 feet or less. .SUNDAY...Northeast winds 10 to 15 knots becoming east 5 to 10 knots in the late morning and afternoon. Mostly sunny. Waves 2 feet or less. .SUNDAY NIGHT...East winds 10 to 15 knots. Mostly cloudy. A chance of light showers after midnight. Waves 2 feet or less. .MONDAY...Southeast winds 10 to 15 knots becoming southwest 15 to 20 knots in the afternoon and evening. Light showers...then partly cloudy in the evening. Waves 1 to 3 feet. .TUESDAY...North winds 15 to 20 knots. Mostly clear. Waves 2 feet or less. .WEDNESDAY...East winds 5 to 10 knots. Partly cloudy. 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