FZUS63 KDTX 211343

GLFSC 



Lake St Clair Forecast

National Weather Service Detroit/Pontiac MI

943 AM EDT Mon Sep 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...High pressure, 30.40 inches, over northern Ontario

will build southeast early this week. This will lead to prolong

moderate northeast winds over the central Great Lakes.



LCZ460-212145-

Lake St Clair-

943 AM EDT Mon Sep 21 2026



...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING...



.REST OF TODAY...Northeast winds 15 to 20 knots with gusts to 25

knots. Mostly cloudy. Waves 1 to 3 feet.

.TONIGHT...Northeast winds 20 to 25 knots. Gusts to 30 knots by

midnight. Mostly cloudy this evening becoming partly cloudy. Waves 1

to 3 feet building to 2 to 4 feet in the late evening and overnight.

.TUESDAY...Northeast winds 20 to 25 knots diminishing to 15 to 20

knots early in the afternoon. Partly sunny. Waves 2 to 4 feet

subsiding to 1 to 3 feet early in the afternoon.

.TUESDAY NIGHT...Northeast winds to 30 knots with gusts to 35 knot

gales. Partly cloudy early in the evening becoming mostly cloudy.

Waves 3 to 5 feet. Waves occasionally around 7 feet.  A Gale Warning

may be needed.

.WEDNESDAY...Northeast winds 20 to 25 knots becoming east 15 to 20

knots in the afternoon...then increasing to 20 to 25 knots in the

evening. Partly cloudy. Waves 2 to 4 feet.

.THURSDAY...East winds 20 to 25 knots. Mostly clear. Waves 1 to 3

feet.

.FRIDAY...North winds 10 to 15 knots. Mostly clear. Waves 2 feet or

less.



$$



SF



Experimental modernized open lake forecast is available online at

weather.gov/dtx/glftablesc



Graphical marine forecasts are available at weather.gov/greatlakes