FZUS63 KDTX 211345
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
945 AM EDT Tue Apr 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 weak low pressure system will pass through Southeast
Michigan this afternoon and evening. There is a chance of showers
and storms across the south and is followed by an area of high
pressure at 30.00 inches on Wednesday. A warm front slowly lifts
into the area late Thursday into Friday as the parent low
pressure stalls over the upper Midwest.

LCZ460-212145-
Lake St Clair-
945 AM EDT Tue Apr 21 2026

.REST OF TODAY...South winds 15 to 20 knots. Partly sunny. A chance
of sprinkles late in the morning. Waves 1 to 3 feet.
.TONIGHT...Southwest winds 10 to 15 knots becoming west 5 to 10
knots by midnight...then veering to the north early in the morning.
Partly cloudy. Waves 2 feet or less.
.WEDNESDAY...North winds 5 to 10 knots until late afternoon becoming
light and variable. Mostly sunny. Waves 2 feet or less.
.WEDNESDAY NIGHT...Northeast winds 5 to 10 knots becoming light and
variable. Mostly clear. Waves 2 feet or less.
.THURSDAY...Southeast winds 5 to 10 knots. Mostly clear. Waves 2
feet or less.
.FRIDAY...Southeast winds 10 to 15 knots. Partly cloudy. Light
showers likely. Waves 2 feet or less.
.SATURDAY...Northeast winds 10 to 15 knots. Mostly cloudy. Light
showers likely. Waves 2 feet or less.

$$

KDK

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

Graphical marine forecasts are available at weather.gov/greatlakes