Great Lakes Forecast
Issued by NWS
Issued by NWS
485 FZUS63 KDTX 141947 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 347 PM EDT Mon Sep 14 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, 30.30 inches, passes overhead this afternoon before departing east this evening. Low pressure, 29.30 inches, then tracks across northern Ontario on Tuesday which elevates wind gusts to gale force across central and northern Lake Huron. A Gale Warning is in effect there from late tonight through Tuesday afternoon. LCZ460-150400- Lake St Clair- 347 PM EDT Mon Sep 14 2026 .TONIGHT...Southeast winds 5 to 10 knots becoming south 15 to 20 knots. Partly cloudy. Waves 2 feet or less. .TUESDAY...South winds 15 to 20 knots with gusts briefly to 25 knots in the afternoon. Partly sunny. A chance of light showers in the afternoon. Waves 1 to 3 feet. .TUESDAY NIGHT...Southwest winds 10 to 15 knots diminishing to 5 to 10 knots by midnight...then veering to the northwest after midnight. Partly cloudy early in the evening becoming mostly cloudy. A chance of showers and thunderstorms early in the evening...then a chance of light showers in the late evening and overnight. Waves 2 feet or less. .WEDNESDAY...North winds 10 to 15 knots diminishing to 5 to 10 knots early in the afternoon. Mostly cloudy. Waves 2 feet or less. .WEDNESDAY NIGHT...Northeast winds 10 to 15 knots diminishing to 5 to 10 knots in the late evening and overnight. Partly cloudy becoming mostly cloudy by midnight becoming partly cloudy. A chance of light showers after midnight. Waves 2 feet or less. .THURSDAY...North winds 5 to 10 knots. Partly sunny becoming mostly cloudy. A chance of light showers. Waves 2 feet or less. .FRIDAY...Northeast winds 5 to 10 knots. Partly cloudy. Waves 2 feet or less. .SATURDAY...South winds 10 to 15 knots. Partly cloudy. Showers likely. Waves 2 feet or less. $$ TF Experimental modernized open lake forecast is available online at weather.gov/dtx/glftablesc Graphical marine forecasts are available at weather.gov/greatlakes