Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 200742
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
342 AM EDT THU APR 20 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...29.60 INCHES...WILL TRACK EAST AND
THROUGH LOWER MICHIGAN TODAY.  THIS WILL BRING A PATTERN OF
UNSETTLED WEATHER...WITH SHOWERS AND THUNDERSTORMS LIKELY THROUGH
THIS EVENING.  THIS LOW WILL THEN TRACK FROM SOUTHERN ONTARIO INTO
WESTERN QUEBEC TONIGHT AND FRIDAY.   HIGH PRESSURE...30.30
INCHES...WILL SETTLE BACK IN ACROSS MICHIGAN BY SATURDAY.

LCZ460-202015-
LAKE ST CLAIR-
342 AM EDT THU APR 20 2017

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