822
FZUS63 KDTX 021354
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
954 AM EDT Tue Sep 2 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, 30.20 inches, will persist across the
eastern Great Lakes today and tonight. Low pressure, 29.60
inches, is forecast to develop over western Lake Superior
Wednesday. This system will drive a strong cold front across Lake
Huron Wednesday night as it lifts into northern Ontario,
triggering showers and a few thunderstorms. Much cooler air will
advance across the Great Lakes in the wake of this system and
will persist across the area into the weekend.

LCZ460-022200-
Lake St Clair-
954 AM EDT Tue Sep 2 2025

.REST OF TODAY...Light and variable winds becoming southeast 5 to 10
knots late in the afternoon. Sunny. Waves 2 feet or less.
.TONIGHT...South winds 5 to 10 knots. Clear. Waves 2 feet or less.
.WEDNESDAY...Southwest winds 5 to 10 knots becoming south 10 to 15
knots in the late morning and afternoon. Mostly sunny. Waves 2 feet
or less.
.WEDNESDAY NIGHT...Southwest winds 15 to 20 knots. Partly cloudy
early in the evening. A chance of showers and thunderstorms until
early morning...then showers after midnight. A chance of waterspouts
in the late evening and early morning. Waves 1 to 3 feet.
.THURSDAY...West winds 15 to 20 knots diminishing to 10 to 15 knots
in the afternoon and evening. Mostly cloudy with light showers in
the morning...then mostly clear in the afternoon and evening. Waves
1 to 3 feet.
.FRIDAY...West winds 20 to 25 knots with gusts to 30 knots. Mostly
clear. Waves 1 to 3 feet. A Small Craft Advisory may be needed.
.SATURDAY...West winds 10 to 15 knots. Mostly clear. Waves 2 feet or
less.

$$

MV

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

Graphical marine forecasts are available at weather.gov/greatlakes