Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 190755
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
355 AM EDT WED APR 19 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 GRADUALLY WEAKEN AS
IT TRACKS FROM SOUTHERN ONTARIO INTO WESTERN QUEBEC TODAY AND
TONIGHT.  THIS WILL ALLOW A COLD FRONT TO SLIP ACROSS THE CENTRAL
GREAT LAKES.  A SECOND LOW PRESSURE SYSTEM...29.60 INCHES...OVER THE
CENTRAL PLAINS ON WEDNESDAY WILL THEN MOVE INTO THE LOWER PENINSULA
ON THURSDAY. HIGH PRESSURE...30.30 INCHES...WILL THEN SETTLE BACK IN
ACROSS MICHIGAN BY SATURDAY.

LCZ460-192015-
LAKE ST CLAIR-
355 AM EDT WED APR 19 2017

.TODAY...SOUTHWEST WINDS 10 TO 15 KNOTS BECOMING WEST 5 TO 10 KNOTS
LATE IN THE AFTERNOON. MOSTLY CLOUDY. A CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. WAVES 2 FEET OR LESS.
.TONIGHT...NORTH WINDS 10 TO 15 KNOTS BECOMING EAST 5 TO 10 KNOTS
EARLY IN THE MORNING. MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 2 FEET OR LESS.
.THURSDAY...EAST WINDS 10 TO 15 KNOTS BECOMING SOUTHEAST 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 EARLY IN THE MORNING...THEN
SHOWERS AND THUNDERSTORMS IN THE LATE MORNING AND AFTERNOON. WAVES 2
FEET OR LESS.
.THURSDAY NIGHT...SOUTHWEST WINDS 5 TO 10 KNOTS BECOMING WEST 15 TO
20 KNOTS. BECOMING PARTLY CLOUDY IN THE LATE EVENING AND OVERNIGHT.
SHOWERS AND THUNDERSTORMS EARLY IN THE EVENING...THEN A CHANCE OF
THUNDERSTORMS LATE IN THE EVENING. A CHANCE OF LIGHT SHOWERS IN THE
LATE EVENING AND EARLY MORNING. WAVES 2 FEET OR LESS.
.FRIDAY...WEST WINDS 15 TO 20 KNOTS BECOMING NORTHWEST 10 TO 15
KNOTS IN THE AFTERNOON AND EVENING. PARTLY CLOUDY. WAVES 2 FEET OR
LESS.
.SATURDAY...NORTHEAST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. WAVES 2
FEET OR LESS.
.SUNDAY...NORTH WINDS 10 TO 15 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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