Great Lakes Forecast
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FZUS63 KDTX 201952
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
352 PM EDT Sat Apr 20 2019

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...Low pressure, 29.50 inches, will lift from western
Pennsylvania this afternoon to upstate New York tonight,
weakening to 29.70 inches. A narrow ridge of high pressure, 30.00
inches, will develop over Lower Michigan on Sunday. The high
pressure will then expand and strengthen across the Upper Ohio
Valley Sunday night into Monday before sliding into the
southeastern US by Monday night. A low pressure system and
associated cold front is forecast to track across the region
Tuesday.

LCZ460-210830-
Lake St Clair-
352 PM EDT Sat Apr 20 2019

.TONIGHT...North winds 15 to 20 knots diminishing to 10 to 15 knots
late in the evening...then becoming light and variable after
midnight. Cloudy. A chance of rain during the evening. Waves 2
feet or less.
.SUNDAY...Light and variable winds. Mostly cloudy. Waves nearly
calm.
.SUNDAY NIGHT...Light and variable winds. Partly cloudy. Waves 2
feet or less.
.MONDAY...Light and variable winds becoming south 5 to 10 knots in
the late morning and afternoon. Mostly sunny. Waves 2 feet or less.
.MONDAY NIGHT...South winds 5 to 10 knots. Partly cloudy. Waves 2
feet or less.
.TUESDAY...South winds 5 to 10 knots becoming southwest 10 to 15
knots in the afternoon...then veering to the northwest in the
evening. Mostly cloudy with a chance of showers and thunderstorms.
Waves 2 feet or less.
.WEDNESDAY...Northeast winds 5 to 10 knots. Partly cloudy. Waves 2
feet or less.
.THURSDAY...Southwest winds 5 to 10 knots. Partly cloudy. Waves 2
feet or less.

$$

BT

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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