337
FZUS63 KDTX 211347
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
947 AM 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 late
tonight, with potential for strong to severe thunderstorms in its
wake. A second cold front then sweeps across the area Tuesday
evening, bringing a brief period of gusts to gale force. High
pressure fills in mid-week for a drier pattern to end the work
week.

LCZ460-212200-
Lake St Clair-
947 AM EDT Tue Jul 21 2026

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.REST OF TODAY...West winds 15 to 20 knots. Mostly sunny. Light
showers likely and a chance of thunderstorms in the afternoon. Waves
1 to 3 feet.
.TONIGHT...Northwest winds 15 to 20 knots increasing to 20 to 25
knots with gusts to 30 knots in the late evening and overnight.
Mostly clear. A chance of 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 20 to 25 knots diminishing to 10 to 15
knots. Mostly sunny. Waves 1 to 3 feet.
.WEDNESDAY NIGHT...North winds 10 to 15 knots diminishing to 5 to 10
knots after midnight. Clear. Waves 2 feet or less.
.THURSDAY...North winds 5 to 10 knots in the morning becoming light
and variable...then becoming southeast 5 to 10 knots in the evening.
Clear. Waves 2 feet or less.
.FRIDAY...Southeast winds 5 to 10 knots. Mostly clear. Waves 2 feet
or less.
.SATURDAY...South winds 5 to 10 knots. Mostly clear. Waves 2 feet or
less.

$$

SS

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

Graphical marine forecasts are available at weather.gov/greatlakes