Great Lakes Forecast
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287
FZUS63 KDTX 232030
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
330 PM EST Thu Nov 23 2017

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...Ridge of surface high pressure, 30.00 inches, will
remain over the region through Friday morning. Pressure gradient
will increase ahead of the next low pressure system and lead to
gusty winds Friday afternoon and evening. This low pressure, 29.10
inches, will move eastward across Ontario just north of Lake
Superior and push a cold front through the Great Lakes early on
Saturday. High pressure will build into the region on Sunday.

LCZ460-240915-
Lake St Clair-
330 PM EST Thu Nov 23 2017

...SMALL CRAFT ADVISORY IN EFFECT FROM FRIDAY AFTERNOON THROUGH
LATE FRIDAY NIGHT...

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

$$

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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