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FZUS63 KDTX 180736
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
336 AM EDT Thu Sep 18 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, over the central and
eastern Great Lakes will gradually weaken into Thursday. A
stronger high developing over northern Ontario forces a weak cold
front across the region Thursday. The high pressure then
gradually shifts southeast across Ontario before reaching
southern Quebec on Saturday and New England on Sunday.

LCZ460-181545-
Lake St Clair-
336 AM EDT Thu Sep 18 2025

.TODAY...Light and variable winds becoming southeast 5 to 10 knots
in the afternoon. Mostly sunny. Waves 2 feet or less.
.TONIGHT...Northeast winds 10 to 15 knots diminishing to 5 to 10
knots in the late evening and overnight. Partly cloudy. Waves 2 feet
or less.
.FRIDAY...Northeast winds 5 to 10 knots increasing to 10 to 15 knots
early in the afternoon. Mostly sunny. Waves 2 feet or less.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Mostly clear. Waves
2 feet or less.
.SATURDAY...East winds 10 to 15 knots. Mostly sunny in the morning
becoming partly cloudy. Waves 2 feet or less.
.SUNDAY...South winds 10 to 15 knots. Partly cloudy. A chance of
showers. Waves 2 feet or less.
.MONDAY...South winds 10 to 15 knots. Mostly cloudy with showers
likely. Waves 2 feet or less.

$$

KDK

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

Graphical marine forecasts are available at weather.gov/greatlakes