435
FZUS63 KDTX 211953
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
353 PM EDT Tue Jul 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...A cold front tracks across the Great Lakes tonight
shifting winds to the northwest and diminishing thunderstorm
chances. A brief pop in wind gusts to gales will be possible
along the front. Breezy northwest flow through mid-week before
high pressure fills in for the rest of the week.

LCZ460-220400-
Lake St Clair-
353 PM EDT Tue Jul 21 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM EDT THIS EVENING...

.TONIGHT...Northwest winds 15 to 20 knots increasing to 20 to 25
knots in the late evening and overnight. Partly cloudy. Scattered
showers and thunderstorms early in the evening. Waves 1 to 3 feet
building to 2 to 4 feet in the late evening and overnight.
.WEDNESDAY...Northwest winds 15 to 20 knots diminishing to 10 to 15
knots in the afternoon. Mostly sunny. Waves 1 to 3 feet.
.WEDNESDAY NIGHT...Northwest winds 10 to 15 knots becoming north 5
to 10 knots in the late evening and overnight. Mostly clear. Waves 2
feet or less.
.THURSDAY...North winds 5 to 10 knots early in the morning becoming
light and variable...then becoming east 5 to 10 knots early in the
afternoon. Sunny. Waves 2 feet or less.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots becoming light and
variable. Clear. Waves 2 feet or less.
.FRIDAY...Light and variable winds becoming southeast 5 to 10 knots
in the afternoon and evening. Mostly sunny becoming sunny in the
afternoon becoming mostly clear. Waves 2 feet or less.
.SATURDAY...South winds 10 to 15 knots. Mostly clear. Waves 2 feet
or less.
.SUNDAY...South winds 10 to 15 knots. Mostly clear. A chance of
showers and thunderstorms. 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