Great Lakes Forecast
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FZUS63 KDTX 121428
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
928 AM EST Tue Dec 12 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 low pressure clipper system will deepen as it races to
the New England states by this afternoon. A weak surface ridge will
bring a brief increase in pressure up to 29.90 inches this afternoon
before a second clipper system, averaging 29.60 inches, drops south
of Michigan Wednesday into Thursday.

LCZ460-122115-
Lake St Clair-
928 AM EST Tue Dec 12 2017

...GALE WARNING IN EFFECT THROUGH THIS EVENING...

.REST OF TODAY...Northwest winds to 30 knots with gusts to 35 knot
gales. Partly sunny with scattered light snow showers. Waves 3 to 5
feet. Waves Waves occasionally around 7 feet.
.TONIGHT...Northwest winds to 30 knots diminishing to 20 to 25 knots
early in the morning. Gusts to 35 knot gales. Partly cloudy.
Scattered flurries. Waves 3 to 5 feet. Waves Waves occasionally
around 7 feet.
.WEDNESDAY...Northwest winds 15 to 20 knots becoming west 10 to 15
knots late in the morning...then diminishing to 5 to 10 knots early
in the afternoon backing to the southeast late in the afternoon.
Mostly sunny with scattered flurries early in the morning...then
partly sunny late in the morning. Mostly cloudy with light snow
likely in the afternoon. Waves 1 to 3 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 10 knots becoming north 10
to 15 knots in the late evening and overnight. Mostly cloudy. Light
snow likely until early morning. Waves 2 feet or less.
.THURSDAY...Northwest winds 10 to 15 knots becoming west 5 to 10
knots in the afternoon and evening. Partly sunny becoming mostly
sunny late in the morning becoming partly sunny becoming mostly
cloudy late in the evening. Waves 2 feet or less.
.FRIDAY...West winds 10 to 15 knots. Mostly cloudy with a chance of
snow showers. Waves 2 feet or less.
.SATURDAY...Southwest winds 10 to 15 knots. Mostly cloudy. A chance
of snow showers. Waves 2 feet or less.

$$

MANN

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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