570
FZUS63 KDTX 211358
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
958 AM EDT Fri Aug 21 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, 30.00 inches, maintains influence
across the central and eastern Great Lakes today. The next low
pressure system then arrives Saturday, dragging a cold front
across the area and increasing shower and thunderstorm chances.
Post-frontal northwest flow leads to gusty winds Sunday.

LCZ460-212200-
Lake St Clair-
958 AM EDT Fri Aug 21 2026

.REST OF TODAY...Southeast winds 5 to 10 knots increasing to 10 to
15 knots in the afternoon. Mostly sunny. Waves 2 feet or less.
.TONIGHT...Southeast winds 10 to 15 knots becoming south 5 to 10
knots after midnight. Partly cloudy. A chance of light showers late
in the evening. Waves 2 feet or less.
.SATURDAY...Southwest winds 5 to 10 knots. Partly sunny. A chance of
light showers in the late morning and early afternoon. Showers
likely and a chance of thunderstorms early in the afternoon. Waves 2
feet or less.
.SATURDAY NIGHT...Northwest winds 10 to 15 knots increasing to 15 to
20 knots in the late evening and overnight. Becoming mostly clear in
the late evening and overnight. Light showers and a chance of
thunderstorms early in the evening...then a chance of light showers
by midnight. Waves 2 feet or less.
.SUNDAY...Northwest winds 15 to 20 knots diminishing to 10 to 15
knots in the evening. Mostly sunny in the morning...then mostly
clear with a chance of light showers in the afternoon and evening.
Waves 2 feet or less.
.MONDAY...Northwest winds 10 to 15 knots. Mostly clear. Waves 2 feet
or less.
.TUESDAY...South winds 5 to 10 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