Great Lakes Forecast
Issued by NWS

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709
FZUS63 KDTX 201358
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
957 AM EDT SAT AUG 20 2016

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...29.70 INCHES...WILL LIFT FROM THE MID
MISSISSIPPI VALLEY THIS MORNING TO THE STRAITS REGION BY
EVENING...DEEPENING TO 29.40 INCHES. THE LOW WILL SLOWLY ROTATE INTO
NORTHERN ONTARIO BY SUNDAY...DEEPENING TO 29.30 INCHES. THE LOW WILL
THEN LIFT INTO QUEBEC ON SUNDAY. HIGH PRESSURE WILL EXPAND ACROSS
THE OHIO VALLEY AND SOUTHERN GREAT LAKES ON MONDAY.

LCZ460-202000-
LAKE ST CLAIR-
957 AM EDT SAT AUG 20 2016

...SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM EDT THIS AFTERNOON
THROUGH SUNDAY AFTERNOON...

.REST OF TODAY...SOUTH WINDS 5 TO 10 KNOTS...INCREASING TO 15 TO
20 KNOTS WITH GUSTS TO 25 KNOTS. PARTLY SUNNY. A CHANCE OF SHOWERS
AND THUNDERSTORMS BY EARLY AFTERNOON. SHOWERS AND THUNDERSTORMS
LIKELY LATE. WAVES 2 FEET OR LESS.
.TONIGHT...SOUTH WINDS 20 TO 25 KNOTS...BECOMING WEST 15 TO 20 KNOTS
AFTER MIDNIGHT. MOSTLY CLOUDY WITH SHOWERS AND THUNDERSTORMS LIKELY
THROUGH MIDNIGHT...THEN PARTLY CLOUDY WITH A CHANCE OF LIGHT SHOWERS
AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.SUNDAY...WEST WINDS 15 TO 20 KNOTS WITH GUSTS TO 25 KNOTS. PARTLY
SUNNY. A CHANCE OF WATERSPOUTS. A CHANCE OF LIGHT SHOWERS BY MID
AFTERNOON. WAVES 1 TO 3 FEET.
.SUNDAY NIGHT...NORTHWEST WINDS 15 TO 20 KNOTS...BECOMING NORTH 5 TO
10 KNOTS BY MIDNIGHT...THEN BECOMING LIGHT AND VARIABLE LATE. MOSTLY
CLEAR. WAVES 2 FEET OR LESS.
.MONDAY...LIGHT AND VARIABLE WINDS...BECOMING WEST 5 TO 10 KNOTS BY
MID AFTERNOON. MOSTLY CLEAR...BECOMING CLEAR. WAVES 2 FEET OR LESS.
.TUESDAY...SOUTH WINDS 5 TO 10 KNOTS. CLEAR. WAVES 2 FEET OR LESS.
.WEDNESDAY...SOUTH WINDS 10 TO 15 KNOTS. MOSTLY CLEAR. A CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES 2 FEET OR LESS.

$$

DG

EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/DTX/GLFTABLESC (ALL LOWER CASE)

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



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