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881
FZUS63 KDTX 201347
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
947 AM EDT Sun Sep 20 2026

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, 30.40 inches, over northern Ontario
will build southeast early next week. This will lead to prolong
moderate northeast winds over the central Great Lakes.

LCZ460-202200-
Lake St Clair-
947 AM EDT Sun Sep 20 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING
THROUGH WEDNESDAY EVENING...

.REST OF TODAY...Northeast winds 10 to 15 knots. Mostly cloudy.
Patchy fog late in the morning. Light showers likely late in the
morning...then a chance of light showers early in the afternoon.
Waves 2 feet or less.
.TONIGHT...Northeast winds 15 to 20 knots increasing to 20 to 25
knots in the late evening and overnight. Partly cloudy. Waves 1 to 3
feet building to 2 to 4 feet in the late evening and overnight.
.MONDAY...Northeast winds 20 to 25 knots diminishing to 15 to 20
knots in the late morning and afternoon. Partly sunny. Waves 1 to 3
feet.
.MONDAY NIGHT...Northeast winds 20 to 25 knots increasing to 30
knots in the late evening and overnight. Mostly cloudy. Waves 2 to 4
feet.
.TUESDAY...Northeast winds 20 to 25 knots diminishing to 15 to 20
knots with gusts to 30 knots in the afternoon...then increasing to
30 knots in the evening. Partly sunny in the morning becoming mostly
cloudy. Waves 2 to 4 feet building to 3 to 5 feet in the evening.
Waves occasionally around 7 feet.
.WEDNESDAY...East winds to 30 knots. Mostly cloudy with a chance of
showers. Waves 2 to 4 feet.
.THURSDAY...East winds 20 to 25 knots. Partly cloudy. Waves 1 to 3
feet.

$$

SF

Experimental modernized open lake forecast is available online at
weather.gov/dtx/glftablesc

Graphical marine forecasts are available at weather.gov/greatlakes