011
FZUS63 KDTX 200149
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
949 PM EDT Sun Jul 19 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 encompasses the Great Lakes tonight,
then exits into the Mid-Atlantic on Monday as a cold front reaches
the western Great Lakes. This front will pass across the region
Monday night into Tuesday leading to periods of showers and
thunderstorms. Wet weather could persist into Tuesday before high
pressure from Alberta/Manitoba builds in by Tuesday evening with a
drying effect.

LCZ460-201000-
Lake St Clair-
949 PM EDT Sun Jul 19 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM LATE MONDAY NIGHT THROUGH
TUESDAY EVENING...

.REST OF TONIGHT...East winds 5 to 10 knots by midnight becoming
light and variable. Clear. Waves 2 feet or less.
.MONDAY...Light and variable winds becoming south 10 to 15 knots.
Sunny until late afternoon becoming partly sunny. Patchy smoke.
Waves 2 feet or less.
.MONDAY NIGHT...South winds 15 to 20 knots becoming southwest 20 to
25 knots after midnight. Partly cloudy. Patchy smoke. A chance of
light showers after midnight. Waves 1 to 3 feet building to 2 to 4
feet after midnight.
.TUESDAY...Southwest winds 20 to 25 knots with gusts to 30 knots
becoming west 15 to 20 knots in the late morning and afternoon.
Partly sunny. Light showers likely early in the morning. A chance of
light showers in the late morning and early afternoon...then light
showers likely and a chance of thunderstorms early in the afternoon.
Waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning and
afternoon.
.TUESDAY NIGHT...Northwest winds 15 to 20 knots increasing to 20 to
25 knots in the late evening and overnight. Mostly clear. Light
showers likely and a chance of thunderstorms early in the evening.
Waves 1 to 3 feet building to 2 to 4 feet in the late evening and
overnight.
.WEDNESDAY...Northwest winds 20 to 25 knots becoming north 10 to 15
knots. Partly cloudy in the morning then clearing. Waves 1 to 3
feet.
.THURSDAY...South winds 5 to 10 knots. Clear. Waves 2 feet or less.
.FRIDAY...East winds 5 to 10 knots. Mostly clear. Waves 2 feet or
less.

$$

KGK

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

Graphical marine forecasts are available at weather.gov/greatlakes