559
FZUS63 KDTX 310143
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
943 PM EDT Thu Jul 30 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, 30.30 inches, governs Great Lakes
conditions into tomorrow. Low pressure then tracks into the Ohio
Valley this weekend, with local pressure averaging around 29.90
inches. This brings rain and isolated thunderstorm chances to the
Great Lakes Friday night into Sunday along with elevated winds and
waves into Saginaw Bay and the Thumb nearshores.

LCZ460-310945-
Lake St Clair-
943 PM EDT Thu Jul 30 2026

.REST OF TONIGHT...Light and variable winds. Mostly clear. Waves 2
feet or less.
.FRIDAY...Light and variable winds becoming southeast 5 to 10 knots
in the afternoon. Partly sunny. Waves 2 feet or less.
.FRIDAY NIGHT...South winds 5 to 10 knots. Cloudy. Waves 2 feet or
less.
.SATURDAY...East winds 5 to 10 knots. Cloudy. A chance of light
showers until late afternoon. Light showers likely and a chance of
thunderstorms early in the afternoon. Waves 2 feet or less.
.SATURDAY NIGHT...Northeast winds 10 to 15 knots. Mostly cloudy. A
chance of thunderstorms early in the evening. Light showers likely
...then a chance of light showers after midnight. Waves 2 feet or
less.
.SUNDAY...Northeast winds 10 to 15 knots becoming north 15 to 20
knots in the evening. Mostly cloudy with a chance of light showers
in the morning...then partly cloudy with a chance of showers and
thunderstorms in the afternoon and evening. Waves 1 to 3 feet.
.MONDAY...Northeast winds 10 to 15 knots. Mostly clear. Waves 2 feet
or less.
.TUESDAY...Southeast winds 5 to 10 knots. Mostly clear. Waves 2 feet
or less.

$$

AA

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

Graphical marine forecasts are available at weather.gov/greatlakes