Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 180747
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
347 AM EDT TUE APR 18 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 AVERAGING 30.10 INCHES...WILL REMAIN IN
CENTERED ACROSS THE GREAT LAKES TODAY. LOW PRESSURE...29.60
INCHES...WILL THEN PUSH EAST FROM THE NORTH CENTRAL PLAINS INTO
SOUTHERN ONTARIO THROUGH WEDNESDAY. A SECOND LOW PRESSURE
SYSTEM...29.60 INCHES...IS THEN EXPECTED TO MOVE IN FROM THE CENTRAL
PLAINS INTO THE LOWER PENINSULA WEDNESDAY INTO THURSDAY. HIGH
PRESSURE...30.40 INCHES...WILL THEN SETTLE BACK IN ACROSS MICHIGAN
BY SATURDAY.

LCZ460-182015-
LAKE ST CLAIR-
347 AM EDT TUE APR 18 2017

.TODAY...EAST WINDS 5 TO 10 KNOTS INCREASING TO 10 TO 15 KNOTS LATE
IN THE MORNING...THEN BECOMING SOUTHEAST 5 TO 10 KNOTS EARLY IN THE
AFTERNOON INCREASING TO 10 TO 15 KNOTS LATE IN THE AFTERNOON. MOSTLY
SUNNY. WAVES 2 FEET OR LESS.
.TONIGHT...SOUTHEAST WINDS 10 TO 15 KNOTS. MOSTLY CLEAR UNTIL EARLY
MORNING BECOMING MOSTLY CLOUDY. WAVES 2 FEET OR LESS.
.WEDNESDAY...SOUTH WINDS 10 TO 15 KNOTS BECOMING WEST 5 TO 10 KNOTS
LATE IN THE AFTERNOON. CLOUDY WITH A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 2 FEET OR LESS.
.WEDNESDAY NIGHT...NORTHEAST WINDS 5 TO 10 KNOTS. CLOUDY. SHOWERS
AND THUNDERSTORMS LIKELY UNTIL EARLY MORNING...THEN A CHANCE OF
SHOWERS AND THUNDERSTORMS EARLY IN THE MORNING. WAVES 2 FEET OR
LESS.
.THURSDAY...SOUTHEAST WINDS 10 TO 15 KNOTS VEERING TO THE SOUTHWEST
IN THE AFTERNOON AND EVENING. MOSTLY CLOUDY. SHOWERS AND
THUNDERSTORMS LIKELY UNTIL LATE AFTERNOON...THEN A CHANCE OF
THUNDERSTORMS EARLY IN THE EVENING. A CHANCE OF LIGHT SHOWERS IN THE
EVENING. WAVES 2 FEET OR LESS.
.FRIDAY...NORTH WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. A CHANCE OF
LIGHT SHOWERS. WAVES 2 FEET OR LESS.
.SATURDAY...NORTHEAST WINDS 5 TO 10 KNOTS. PARTLY CLOUDY. WAVES 2
FEET OR LESS.

$$

JVC

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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