Great Lakes Forecast
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FZUS63 KDTX 221947
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
347 PM EDT Sat Jul 22 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...A broad area of low pressure, 29.70 inches, will
slowly track across Lower Michigan through Sunday. The system will
exit to the east Sunday night, pulling a cold front through the
central Great Lakes late Sunday and Sunday night. High
pressure, 30.20 inches, then builds into the area Monday and
Tuesday.

LCZ460-230815-
Lake St Clair-
347 PM EDT Sat Jul 22 2017

.TONIGHT...Light and variable winds becoming northeast 5 to 10 knots
late in the evening...then becoming light and variable after
midnight. Mostly cloudy becoming partly cloudy late this evening
becoming mostly cloudy. A chance of showers and thunderstorms early
in the evening. Patchy fog after midnight. Waves 2 feet or less.
.SUNDAY...Light and variable winds becoming east 5 to 10 knots late
in the morning...then becoming light and variable in the afternoon.
Patchy fog early in the morning. Mostly cloudy with a chance of
showers and thunderstorms. Waves 2 feet or less.
.SUNDAY NIGHT...Light and variable winds becoming west 5 to 10 knots
in the late evening and overnight. Partly cloudy. A chance of
showers and thunderstorms early in the evening. Waves 2 feet or
less.
.MONDAY...Northwest winds 5 to 10 knots becoming north 10 to 15
knots in the afternoon. Partly sunny. Waves 2 feet or less.
.MONDAY NIGHT...North winds 10 to 15 knots diminishing to 5 to 10
knots after midnight. Mostly clear. Waves 2 feet or less.
.TUESDAY...Northeast winds 5 to 10 knots becoming light and
variable. Mostly sunny becoming clear. Waves 2 feet or less.
.WEDNESDAY...Southwest winds 5 to 10 knots. Mostly clear. Waves 2
feet or less.
.THURSDAY...North winds 5 to 10 knots. Partly cloudy. A chance of
showers and thunderstorms. 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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