Great Lakes Forecast
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539
FZUS63 KDTX 210756
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
355 AM EDT FRI JUL 21 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...Broad high pressure, averaging 30.00 inches, will
promote quiet weather as it encompasses the central Great Lakes
today. Low pressure tracking through the region will then bring
rounds of thunderstorms to the area late tonight through Sunday.

LCZ460-212000-
Lake St Clair-
355 AM EDT FRI JUL 21 2017

.TODAY...North winds 5 to 10 knots veering to the southeast late in
the afternoon. Mostly sunny. Waves 2 feet or less.
.TONIGHT...South winds 5 to 10 knots. Partly cloudy until early
morning...then mostly cloudy with a chance of showers early in the
morning. Waves 2 feet or less.
.SATURDAY...South winds 10 to 15 knots becoming southwest 5 to 10
knots late in the afternoon. Mostly cloudy. Showers likely and a
chance of thunderstorms until late afternoon...then a chance of
showers and thunderstorms late in the afternoon. Waves 2 feet or
less.
.SATURDAY NIGHT...Northwest winds 10 to 15 knots becoming north 5 to
10 knots in the late evening and overnight. Mostly cloudy with a
chance of showers and thunderstorms. Waves 2 feet or less.
.SUNDAY...Northwest winds 5 to 10 knots. Mostly cloudy with a chance
of showers and thunderstorms until late afternoon...then partly
cloudy in the evening. Waves 2 feet or less.
.MONDAY...North winds 10 to 15 knots. Partly cloudy. Waves 2 feet or
less.
.TUESDAY...Northeast winds 10 to 15 knots. Clear. Waves 2 feet or
less.

$$

DG

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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