771
FZUS63 KDTX 182050
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
350 PM EST Tue Nov 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...Low pressure, 29.90 inches, will track across the Ohio
Valley today while high pressure of 30.20 inches holds across the
northern Great Lakes. This high will sustain dry conditions and
light winds across Lake Huron. The high will expand south across
Lower Michigan on Wednesday and drift east of the region by
Thursday. Deepening low pressure over northern Ontario Thursday
will drive a weak cold front across the region Thursday night.

LCZ460-190500-
Lake St Clair-
350 PM EST Tue Nov 18 2025

.TONIGHT...Northeast winds 5 to 10 knots. Mostly cloudy with a
chance of light rain until early morning...then mostly clear early
in the morning. Waves 2 feet or less.
.WEDNESDAY...Northeast winds 5 to 10 knots until late afternoon
becoming light and variable. Mostly sunny until late afternoon
becoming mostly cloudy. Waves 2 feet or less.
.WEDNESDAY NIGHT...Light and variable winds. Mostly cloudy until
early morning becoming partly cloudy. Waves nearly calm.
.THURSDAY...Light and variable winds becoming south 5 to 10 knots in
the late morning and afternoon. Mostly cloudy. Waves 2 feet or less.
.THURSDAY NIGHT...South winds 5 to 10 knots becoming southwest 10 to
15 knots in the late evening and overnight. Mostly cloudy with a
chance of light rain. Waves 2 feet or less.
.FRIDAY...Northwest winds 10 to 15 knots diminishing to 5 to 10
knots in the afternoon and evening. Partly sunny becoming mostly
sunny in the afternoon becoming partly cloudy. Waves 2 feet or less.
.SATURDAY...South winds 5 to 10 knots. Mostly clear. Waves 2 feet or
less.
.SUNDAY...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