Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 190152
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
952 PM EDT SAT APR 18 2015

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 BUILD
EASTWARD ACROSS ONTARIO TONIGHT. LOW PRESSURE OF 29.50 INCHES WILL
DEEPEN TO 29.20 INCHES AS IT LIFTS OVER THE OHIO VALLEY INTO LOWER
MICHIGAN SUNDAY AFTERNOON INTO SUNDAY NIGHT. THIS LOW WILL THEN
CONTINUE INTO ONTARIO ON MONDAY WITH A COLD FRONT SWEEPING
EASTWARD ACROSS THE AREA IN ITS WAKE.

LCZ460-190815-
LAKE ST CLAIR-
952 PM EDT SAT APR 18 2015

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT SUNDAY THROUGH
MONDAY MORNING...

.REST OF TONIGHT...NORTHEAST WINDS 15 TO 20 KNOTS...DIMINISHING TO
10 TO 15 KNOTS BY MIDNIGHT...THEN BECOMING EAST 15 TO 20 KNOTS LATE.
MOSTLY CLEAR. WAVES 1 TO 3 FEET.
.SUNDAY...EAST WINDS 20 TO 25 KNOTS...DIMINISHING TO 15 TO 20 KNOTS
BY MID AFTERNOON. MOSTLY CLOUDY. A CHANCE OF LIGHT SHOWERS BY LATE
MORNING. LIGHT SHOWERS LIKELY BY MID AFTERNOON. WAVES 2 TO 3
FEET.
.SUNDAY NIGHT...EAST WINDS 15 TO 20 KNOTS...BECOMING SOUTHEAST 20 TO
25 KNOTS BY MIDNIGHT...THEN BECOMING SOUTH 15 TO 20 KNOTS LATE.
LIGHT SHOWERS. WAVES 2 TO 3 FEET.
.MONDAY...SOUTH WINDS 15 TO 20 KNOTS...BECOMING SOUTHWEST 10 TO
15 KNOTS BY LATE MORNING. MOSTLY CLOUDY WITH LIGHT SHOWERS LIKELY.
WAVES 1 TO 3 FEET.
.MONDAY NIGHT...WEST WINDS 10 TO 15 KNOTS...BECOMING SOUTHWEST 5 TO
10 KNOTS BY MIDNIGHT...THEN INCREASING TO 10 TO 15 KNOTS AFTER
MIDNIGHT. PARTLY CLOUDY WITH A CHANCE OF LIGHT SHOWERS. WAVES 2 FEET
OR LESS.
.TUESDAY...WEST WINDS 15 TO 20 KNOTS...DIMINISHING TO 10 TO 15 KNOTS
THROUGH MIDNIGHT. PARTLY SUNNY WITH A CHANCE OF LIGHT SHOWERS...THEN
PARTLY CLOUDY THROUGH MIDNIGHT. WAVES 1 TO 3 FEET.
.WEDNESDAY...WEST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. A CHANCE OF
LIGHT SHOWERS. WAVES 2 FEET OR LESS.
.THURSDAY...NORTHWEST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. WAVES
2 FEET OR LESS.

$$

SC

GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT
WEATHER.GOV/GREATLAKES (ALL LOWER CASE)


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