Great Lakes Forecast
Issued by NWS

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000
FZUS63 KDTX 181346
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
946 AM EDT THU MAY 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...LOW PRESSURE...29.30 INCHES...WILL TRACK NORTHEAST INTO
NORTHERN LOWER MICHIGAN BY THIS AFTERNOON. THE LOW WILL CONTINUE ON
THROUGH ONTARIO AND FORCE A COLD FRONT SOUTH THROUGH THE EASTERN
GREAT LAKES LATE THIS AFTERNOON INTO TONIGHT. HIGH PRESSURE...30.40
INCHES...WILL THEN BUILD INTO AREA LATE TONIGHT INTO FRIDAY AS THE
COLD FRONT STALLS OVER THE OHIO RIVER VALLEY.

LCZ460-182030-
LAKE ST CLAIR-
946 AM EDT THU MAY 18 2017

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.REST OF TODAY...SOUTHWEST WINDS 15 TO 20 KNOTS. GUSTS TO 30 KNOTS.
MOSTLY SUNNY IN THE LATE MORNING AND EARLY AFTERNOON BECOMING MOSTLY
CLOUDY. A CHANCE OF. WAVES 1 TO 3 FEET.
.TONIGHT...SOUTHWEST WINDS 15 TO 20 KNOTS WITH GUSTS TO 30 KNOTS
BECOMING NORTHWEST 10 TO 15 KNOTS IN THE LATE EVENING AND EARLY
MORNING...THEN BECOMING NORTH 15 TO 20 KNOTS EARLY IN THE MORNING.
PARTLY CLOUDY WITH A CHANCE OF SHOWERS AND THUNDERSTORMS EARLY IN
THE EVENING...THEN PARTLY CLOUDY IN THE LATE EVENING AND OVERNIGHT.
WAVES 1 TO 3 FEET.
.FRIDAY...NORTH WINDS 15 TO 20 KNOTS DIMINISHING TO 10 TO 15 KNOTS
IN THE LATE MORNING AND AFTERNOON. MOSTLY CLOUDY UNTIL LATE
AFTERNOON BECOMING MOSTLY SUNNY. WAVES 2 FEET OR LESS.
.FRIDAY NIGHT...NORTHEAST WINDS 10 TO 15 KNOTS DIMINISHING TO 5 TO
10 KNOTS AFTER MIDNIGHT...THEN INCREASING TO 10 TO 15 KNOTS EARLY IN
THE MORNING. PARTLY CLOUDY. WAVES 2 FEET OR LESS.
.SATURDAY...EAST WINDS 10 TO 15 KNOTS. MOSTLY CLOUDY WITH A CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES 2 FEET OR LESS.
.SUNDAY...SOUTHWEST WINDS 10 TO 15 KNOTS. MOSTLY CLOUDY WITH SHOWERS
LIKELY AND A CHANCE OF THUNDERSTORMS. WAVES 2 FEET OR LESS.
.MONDAY...WEST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. A CHANCE OF
SHOWERS. WAVES 2 FEET OR LESS.

$$

SF

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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