Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 180749
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
349 AM 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 OVER
THE NORTHERN GREAT LAKES AND ONTARIO TODAY AND TONIGHT. A LARGE LOW
PRESSURE SYSTEM...AVERAGING 29.50 INCHES...WILL THEN LIFT THROUGH
THE AREA SUNDAY AND MONDAY WHILE DEEPENING TO 29.20 INCHES.

LCZ460-182015-
LAKE ST CLAIR-
349 AM EDT SAT APR 18 2015

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

$$

DRK

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



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