603
FZUS63 KDTX 171950
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
350 PM EDT Thu Sep 17 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...Southern edge of northern Ontario high pressure, 30.30
inches, slides across the central Great Lakes through Thursday. A
secondary cold front passes southward through the region Thursday
night into early Friday before Plains low pressure arrives this
weekend.

LCZ460-180400-
Lake St Clair-
350 PM EDT Thu Sep 17 2026

.TONIGHT...Northeast winds 5 to 10 knots becoming north 10 to 15
knots in the late evening and overnight. Partly cloudy. Waves 2 feet
or less.
.FRIDAY...North winds 10 to 15 knots becoming northeast 5 to 10
knots early in the afternoon...then increasing to 10 to 15 knots
late in the afternoon. Mostly sunny. Waves 2 feet or less.
.FRIDAY NIGHT...Northeast winds 15 to 20 knots diminishing to 10 to
15 knots in the late evening and overnight. Partly cloudy early in
the evening becoming mostly cloudy. Waves 1 to 3 feet.
.SATURDAY...East winds 10 to 15 knots diminishing to 5 to 10 knots
in the late morning and early afternoon...then increasing to 10 to
15 knots early in the afternoon. Mostly cloudy with showers likely.
Waves 2 feet or less.
.SATURDAY NIGHT...East winds 10 to 15 knots. Light showers .. then
showers likely after midnight. Waves 2 feet or less.
.SUNDAY...Northeast winds 10 to 15 knots increasing to 15 to 20
knots in the evening. Mostly cloudy with showers likely in the
morning...then partly cloudy with a chance of light showers in the
afternoon and evening. Waves 1 to 3 feet.
.MONDAY...Northeast winds to 30 knots. Mostly cloudy. Waves 2 to 4
feet. A Small Craft Advisory may be needed.
.TUESDAY...Northeast winds to 30 knots. Partly cloudy. A chance of
showers. Waves 2 to 4 feet.

$$

KDK

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

Graphical marine forecasts are available at weather.gov/greatlakes