Great Lakes Forecast
Issued by NWS

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000
FZUS63 KDTX 171953
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
353 PM EDT FRI APR 17 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...AN AREA OF LOW PRESSURE...AVERAGING 29.80 INCHES...WILL
TRACK THROUGH EASTERN ONTARIO AND ACROSS QUEBEC TONIGHT. THIS WILL
PUSH A COLD FRONT DOWN THROUGH THE CENTRAL GREAT LAKES EARLY ON
SATURDAY. HIGH PRESSURE WILL BUILD OVER THE NORTHERN GREAT LAKES AND
ONTARIO SATURDAY AND SATURDAY NIGHT...STRENGTHENING TO 30.40 INCHES.
A LARGE LOW PRESSURE SYSTEM WILL THEN LIFT THROUGH THE AREA SUNDAY
AND MONDAY.

LCZ460-180815-
LAKE ST CLAIR-
353 PM EDT FRI APR 17 2015

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

$$

HLO

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



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