FZUS63 KDTX 200743
GLFSC 

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
343 AM EDT Wed May 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, will start to build in
over the Great Lakes this morning then slowly move east across
the region through Friday morning. As this occurs, northwest flow
will veer to the northeast and persist into Friday.

LCZ460-201600-
Lake St Clair-
343 AM EDT Wed May 20 2026

.TODAY...North winds 15 to 20 knots diminishing to 10 to 15 knots
late in the morning...then diminishing to 5 to 10 knots early in the
afternoon becoming northeast 10 to 15 knots late in the afternoon.
Mostly cloudy. Waves 2 feet or less.
.TONIGHT...Northeast winds 15 to 20 knots. Mostly cloudy this
evening becoming partly cloudy. Waves 1 to 3 feet.
.THURSDAY...Northeast winds 10 to 15 knots. Mostly sunny. Waves 2
feet or less.
.THURSDAY NIGHT...Northeast winds 10 to 15 knots increasing to 15 to
20 knots after midnight. Partly cloudy becoming mostly cloudy. Waves
1 to 3 feet.
.FRIDAY...East winds 20 to 25 knots increasing to 30 knots in the
evening. Mostly cloudy. A chance of light showers in the afternoon.
Rain showers likely in the evening. Waves 2 to 4 feet. A Small Craft
Advisory may be needed.
.SATURDAY...Southeast winds to 30 knots. Showers and a chance of
thunderstorms. Waves 2 to 4 feet.
.SUNDAY...Northeast winds 10 to 15 knots. Mostly cloudy. Waves 2
feet or less.

$$

TF

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

Graphical marine forecasts are available at weather.gov/greatlakes