Great Lakes Forecast
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FZUS63 KDTX 142021
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
321 PM EST Tue Nov 14 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 averaging 30.30 inches will continue to
push east out of the Great Lakes Tuesday afternoon and evening,
causing pressure to gradually diminish overnight. Pressure will drop
down to 29.80 inches across the Great Lakes by Wednesday afternoon,
as a low pressure system moves from the U.P into southern Ontario.
As a result, occasional showers and gusts up to 25 knots are
expected tomorrow as the low traverses into Canada. Surface high
pressure, 30.30 inches, will then build back in across Michigan by
Thursday afternoon, bringing dry conditions.

LCZ460-151000-
Lake St Clair-
321 PM EST Tue Nov 14 2017

...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY MORNING THROUGH
THURSDAY AFTERNOON...

.TONIGHT...South winds 10 to 15 knots. Partly cloudy until early
morning becoming mostly cloudy. Waves 2 feet or less.
.WEDNESDAY...South winds 15 to 20 knots diminishing to 10 to 15
knots late in the morning...then becoming southwest 15 to 20 knots
in the afternoon. Showers. Waves 1 to 3 feet.
.WEDNESDAY NIGHT...West winds 15 to 20 knots. Gusts to 30 knots in
the late evening and early morning. Mostly cloudy. Light showers
early in the evening...then a chance of light showers in the late
evening and early morning. Waves 1 to 3 feet.
.THURSDAY...Northwest winds 15 to 20 knots. Partly sunny. Waves 1 to
3 feet.
.THURSDAY NIGHT...Northwest winds 10 to 15 knots becoming north 5 to
10 knots in the late evening and early morning...then veering to the
northeast early in the morning. Partly cloudy. Waves 2 feet or less.
.FRIDAY...South winds 10 to 15 knots. A chance of light showers in
the afternoon. Light showers in the evening. Waves 2 feet or less.
.SATURDAY...West winds 20 to 25 knots with gusts to 30 knots.
Showers. Waves 1 to 3 feet. A Small Craft Advisory may be needed.
.SUNDAY...Northwest winds 20 to 25 knots with gusts to 30 knots.
Mostly cloudy with a chance of rain and snow showers. Waves 1 to 3
feet.

$$

IRL

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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