513
FZUS63 KDTX 181946
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
346 PM EDT Mon Aug 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, 30.30 inches, departs east into
southern Quebec this evening. Low pressure, 29.90 inches, then
tracks across the central Great Lakes on Tuesday, triggering
showers and thunderstorms. Gusty northeast wind will follow the
departure of this system on Wednesday. High pressure builds in
from the northern Great Lakes through the late week.

LCZ460-190400-
Lake St Clair-
346 PM EDT Mon Aug 18 2025

.TONIGHT...East winds 10 to 15 knots diminishing to 5 to 10 knots
early in the morning. Mostly clear. Waves 2 feet or less.
.TUESDAY...Southeast winds 5 to 10 knots. Partly sunny. A chance of
light showers. A chance of thunderstorms late in the afternoon.
Waves 2 feet or less.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots backing to the
northeast after midnight. Partly cloudy until early morning becoming
mostly cloudy. A chance of thunderstorms early in the evening. A
chance of light showers until early morning. Waves 2 feet or less.
.WEDNESDAY...North winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and afternoon. Partly sunny. Waves 2 feet or
less.
.WEDNESDAY NIGHT...North winds 15 to 20 knots becoming northeast 10
to 15 knots after midnight. Mostly clear. Waves 1 to 3 feet.
.THURSDAY...Northeast winds 10 to 15 knots diminishing to 5 to 10
knots in the afternoon...then increasing to 10 to 15 knots in the
evening. Mostly sunny in the morning becoming clear. Waves 2 feet or
less.
.FRIDAY...South winds 5 to 10 knots. Clear. Waves 2 feet or less.
.SATURDAY...West winds 10 to 15 knots. Mostly clear. 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