FZUS63 KDTX 100141 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 941 PM EDT Mon Mar 9 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...An elongated trough axis expands into the southern Great Lakes late tonight into Tuesday. Aside from a few isolated showers, a more active stretch of weather gets underway Tuesday night into Wednesday as low pressure, 29.50 inches, lifts across Lower Michigan. Expect several rounds of showers and thunderstorms, including some strong to severe storms. All severe hazards will be possible. The system's frontal passage eventually leads to a transition to melting snowfall by Wednesday evening. LCZ460-100945- Lake St Clair- 941 PM EDT Mon Mar 9 2026 .REST OF TONIGHT...Southwest winds 5 to 10 knots backing to the northeast early in the morning. Mostly clear by midnight becoming mostly cloudy. .TUESDAY...North winds 5 to 10 knots. Mostly cloudy. A chance of light rain in the late morning and afternoon. .TUESDAY NIGHT...Northeast winds 5 to 10 knots becoming east 10 to 15 knots by midnight...then veering to the south after midnight. Light rain likely and a chance of thunderstorms ...then rain and a chance of thunderstorms after midnight. .WEDNESDAY...Southwest winds 10 to 15 knots becoming west 15 to 20 knots early in the afternoon. A chance of thunderstorms early in the morning. Rain. .WEDNESDAY NIGHT...Northwest winds 15 to 20 knots. Rain early in the evening...then a chance of light rain and snow by midnight. .THURSDAY...Northwest winds 15 to 20 knots becoming west 5 to 10 knots. Mostly sunny becoming partly cloudy. .FRIDAY...West at 35 knot gales with gusts to 40 knot gales. Partly cloudy. Light rain and snow likely. A Gale Warning may be needed. .SATURDAY...Southeast winds 20 to 25 knots. Partly cloudy. A chance of light rain and snow. Waves omitted due to ice coverage. $$ KGK Experimental modernized open lake forecast is available online at weather.gov/dtx/glftablesc Graphical marine forecasts are available at weather.gov/greatlakes