693
FZUS63 KDTX 220722
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
322 AM EDT Tue Sep 22 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, 30.60 inches, builds into Quebec today
leading to continued modest east-northeast winds over the central
Great Lakes with mainly dry conditions. Sporadic light shower
chances exist over Lake St. Clair and western Erie tonight. A
weak low pressure system should emerge over the northern portion
of the Ohio Valley on Wednesday, and could lead to slightly
broader coverage of showers for the south-central Great Lakes on
Wednesday.

LCZ460-221530-
Lake St Clair-
322 AM EDT Tue Sep 22 2026

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

.TODAY...Northeast winds 20 to 25 knots diminishing to 15 to 20
knots in the afternoon. Partly sunny. Waves 2 to 4 feet subsiding to
1 to 3 feet in the afternoon.
.TONIGHT...Northeast winds 20 to 25 knots with gusts to 30 knots
becoming east to 30 knots by midnight...then diminishing to 20 to 25
knots early in the morning. Partly cloudy this evening becoming
mostly cloudy. Waves 3 to 5 feet. Waves occasionally around 7 feet.
.WEDNESDAY...East winds 20 to 25 knots diminishing to 15 to 20 knots
with gusts to 30 knots early in the afternoon. Partly sunny. Waves 2
to 4 feet.
.WEDNESDAY NIGHT...East winds 20 to 25 knots diminishing to 15 to 20
knots after midnight. Mostly clear. Waves 2 to 4 feet subsiding to 1
to 3 feet after midnight.
.THURSDAY...East winds 10 to 15 knots. Clear. Waves 2 feet or less.
.FRIDAY...Northeast winds 10 to 15 knots. Clear. Waves 2 feet or
less.
.SATURDAY...Northeast winds 5 to 10 knots. Mostly clear. Waves 2
feet or less.

$$

MR

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

Graphical marine forecasts are available at weather.gov/greatlakes