National Weather Service Marine Forecast FZUS63 KDTX

FZUS63 KDTX 150821
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
321 AM EST Mon Dec 15 2025

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
Arctic air remains overhead today while strong high pressure, 30.80 inches, drifts from the Plains into the Ohio Valley. The next cold front arrives late Monday bringing a period of elevated southwesterly winds but the high will quickly fill back in behind it overnight.

LCZ460-151630
Lake St Clair
321 AM EST Mon Dec 15 2025

SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM EST THIS MORNING THROUGH THIS AFTERNOON

TODAY
Southwest winds 15 to 20 knots increasing to 20 to 25 knots with gusts to 30 knots in the late morning and early afternoon...then diminishing to 15 to 20 knots late in the afternoon. Mostly cloudy. A chance of light snow showers until late afternoon. Waves 1 to 3 feet building to 2 to 4 feet early in the afternoon...then subsiding to 1 to 3 feet late in the afternoon.

TONIGHT
Southwest winds 15 to 20 knots diminishing to 5 to 10 knots. Partly cloudy. Waves 1 to 3 feet.

TUESDAY
Southwest winds 10 to 15 knots becoming south 20 to 25 knots. Partly sunny. Waves 1 to 3 feet.

TUESDAY NIGHT
Southwest winds to 30 knots. Partly cloudy early in the evening becoming mostly cloudy. Waves 3 to 5 feet. Waves occasionally around 7 feet.

WEDNESDAY
Southwest winds 20 to 25 knots becoming west 10 to 15 knots in the afternoon...then becoming south 15 to 20 knots in the evening. Mostly cloudy in the morning becoming partly cloudy. Waves 1 to 3 feet.

THURSDAY
West at 35 knot gales with gusts to 40 knot gales. Light rain and a chance of light snow. Waves 3 to 5 feet. Waves occasionally around 7 feet. A Gale Warning may be needed.

FRIDAY
Southwest at 35 knot gales. Partly cloudy. Waves 3 to 5 feet. Waves occasionally around 7 feet.

CB

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

Graphical marine forecasts are available at weather.gov/greatlakes