Great Lakes Forecast
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FZUS63 KDTX 210240
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
940 PM EST Mon Nov 20 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...High pressure system, 30.10 inches, will exit off the
east coast tonight. The next low pressure system, 29.20 inches,
will move east along the southern tier of Canada to just north of
Lake Superior late tonight. Southwest winds will increase between
the departing high and the approaching low. The attendant cold
front will clear the central Great Lakes region Tuesday, ushering
in another round of brisk northwesterly flow. High pressure will
regain a foothold on Wednesday.

LCZ460-210915-
Lake St Clair-
940 PM EST Mon Nov 20 2017

...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON...

.REST OF TONIGHT...Southwest winds 20 to 25 knots. Partly Cloudy.
Waves 2 to 4 feet.
.TUESDAY...Southwest winds 20 to 25 knots with gusts to 30 knots
diminishing to 15 to 20 knots late in the afternoon. Partly sunny
until late afternoon becoming cloudy. A chance of light showers late
in the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet in the
afternoon.
.TUESDAY NIGHT...Northwest winds 15 to 20 knots diminishing to 10 to
15 knots early in the morning. Cloudy with a chance of light showers
early in the evening...then partly cloudy with a chance of light
rain and snow showers in the late evening and early morning. Mostly
clear early in the morning. Waves 2 feet or less.
.WEDNESDAY...Northwest winds 10 to 15 knots diminishing to 5 to 10
knots in the late morning and afternoon. Mostly sunny. Waves 2 feet
or less.
.WEDNESDAY NIGHT...Light and variable winds becoming southwest 5 to
10 knots in the late evening and overnight. Mostly clear. Waves 2
feet or less.
.THURSDAY...Southwest winds 10 to 15 knots. Partly cloudy becoming
mostly clear. Waves 2 feet or less.
.FRIDAY...Southwest winds 15 to 20 knots with gusts to 30 knots.
Partly cloudy. A chance of showers. Waves 2 feet or less. A Small
Craft Advisory may be needed.
.SATURDAY...Northwest winds 15 to 20 knots with gusts to 30 knots.
Mostly cloudy. Showers likely. Waves 1 to 3 feet.

$$

SC

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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