Great Lakes Forecast
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FZUS63 KDTX 181935
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
335 PM EDT Thu Oct 18 2018

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, 30.50 inches, will continue to extend
into the southern Great Lakes while building across the Ohio
valley this afternoon. High pressure holds there as the next low
pressure system, 29.40 inches, moves into northern Ontario
tonight. The low then continues across northern Ontario Friday
and then deepens to 29.10 inches over northern Quebec while
pulling a strong cold front across the central Great Lakes. A
Gale Watch is in effect Friday and Friday night for this system.

LCZ460-190815-
Lake St Clair-
335 PM EDT Thu Oct 18 2018

.TONIGHT...Southwest winds 10 to 15 knots increasing to 15 to 20
knots after midnight. Clear. Waves 2 feet or less.
.FRIDAY...Southwest winds 15 to 20 knots. Sunny in the morning
becoming partly sunny. Waves 1 to 3 feet.
.FRIDAY NIGHT...Southwest winds 15 to 20 knots increasing to 20 to
25 knots in the late evening and early morning...then becoming west
15 to 20 knots early in the morning. Mostly cloudy with a chance of
light showers. Waves 1 to 3 feet building to 2 to 4 feet late in the
evening...then subsiding to 1 to 3 feet after midnight.
.SATURDAY...West winds 10 to 15 knots becoming northwest 20 to 25
knots with gusts to 30 knots late in the afternoon. Partly sunny
until late afternoon becoming cloudy. A chance of light showers in
the morning...then light showers likely and a chance of light snow
showers in the afternoon. Waves 1 to 3 feet. A Small Craft Advisory
may be needed.
.SATURDAY NIGHT...Northwest winds 20 to 25 knots with gusts to 30
knots diminishing to 15 to 20 knots in the late evening and
overnight. Mostly cloudy early in the evening becoming mostly clear.
Light showers likely and a chance of light snow showers early in the
evening. Waves 1 to 3 feet.
.SUNDAY...Northwest winds 10 to 15 knots becoming west 5 to 10 knots
in the evening. Mostly sunny until late afternoon becoming partly
cloudy. Waves 2 feet or less.
.MONDAY...Southwest winds 10 to 15 knots. Partly cloudy. Waves 2
feet or less.
.TUESDAY...Northwest winds 5 to 10 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


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