Great Lakes Forecast
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411
FZUS63 KDTX 212038
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
337 PM EST TUE NOV 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...High pressure, 30.40 inches, will gradually push east
from the Central Plains into the Ohio Valley late Tuesday into late
Wednesday, which will gradually increase pressure and relax winds
across the Great Lakes region. Prior to high pressure situating
across the Ohio Valley, sustained wind speeds and gusts are expected
to hold steady into the morning hours on Wednesday, peaking between
20 - 25 knots, before relaxing by Wednesday afternoon. Otherwise, a
weak low, 30.00 inches, will then push in across the Great Lakes
throughout Thursday, with pressure holding steady through Friday
morning.

LCZ460-220900-
Lake St Clair-
337 PM EST TUE NOV 21 2017

.TONIGHT...Northwest winds 15 to 20 knots. Cloudy with light snow
showers likely early in the evening...then mostly cloudy with a
chance of light snow showers late in the evening. Mostly clear after
midnight. Waves 1 to 3 feet.
.WEDNESDAY...Northwest winds 10 to 15 knots becoming west 5 to 10
knots in the afternoon. Mostly sunny. Waves 2 feet or less.
.WEDNESDAY NIGHT...West winds 5 to 10 knots becoming southwest 10 to
15 knots after midnight. Partly cloudy until early morning becoming
mostly cloudy. Waves 2 feet or less.
.THURSDAY...Southwest winds 10 to 15 knots. Mostly cloudy. Waves 2
feet or less.
.THURSDAY NIGHT...West winds 10 to 15 knots becoming southwest 5 to
10 knots in the late evening and overnight. Mostly clear. Waves 2
feet or less.
.FRIDAY...Southwest winds 10 to 15 knots becoming south 15 to 20
knots with gusts to 30 knots in the afternoon and evening. Mostly
sunny...then partly cloudy with a chance of showers in the evening.
Waves 1 to 3 feet. A Small Craft Advisory may be needed.
.SATURDAY...Northwest winds 15 to 20 knots with gusts to 30 knots.
Partly cloudy. Showers likely. Waves 1 to 3 feet.
.SUNDAY...Northwest winds 10 to 15 knots. Partly cloudy. 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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