Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 171945
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
345 PM EDT MON APR 17 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
PLACE ACROSS THE GREAT LAKES THROUGH TUESDAY. LOW PRESSURE...29.60
INCHES...WILL THEN PUSH EAST FROM THE NORTH CENTRAL PLAINS INTO
SOUTHERN ONTARIO TUESDAY INTO 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...BRINGING
THE LIKELY CHANCE FOR RAIN AND POSSIBLE CHANCE FOR THUNDERSTORMS.
HIGH PRESSURE...30.40 INCHES.. WILL THEN SETTLE BACK IN ACROSS
MICHIGAN BY SATURDAY.

LCZ460-180815-
LAKE ST CLAIR-
345 PM EDT MON APR 17 2017

.TONIGHT...NORTHEAST WINDS 10 TO 15 KNOTS DIMINISHING TO 5 TO 10
KNOTS AFTER MIDNIGHT. PARTLY CLOUDY. WAVES 2 FEET OR LESS.
.TUESDAY...EAST WINDS 5 TO 10 KNOTS BECOMING SOUTHEAST 10 TO 15
KNOTS IN THE AFTERNOON. MOSTLY SUNNY. WAVES 2 FEET OR LESS.
.TUESDAY NIGHT...SOUTHEAST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY UNTIL
EARLY MORNING...THEN MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND
THUNDERSTORMS EARLY IN THE MORNING. WAVES 2 FEET OR LESS.
.WEDNESDAY...SOUTHWEST WINDS 10 TO 15 KNOTS DIMINISHING TO 5 TO 10
KNOTS LATE IN THE AFTERNOON. MOSTLY CLOUDY WITH A CHANCE OF SHOWERS
AND THUNDERSTORMS. WAVES 2 FEET OR LESS.
.WEDNESDAY NIGHT...NORTH WINDS 5 TO 10 KNOTS VEERING TO THE EAST
EARLY IN THE MORNING. CLOUDY WITH A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES 2 FEET OR LESS.
.THURSDAY...SOUTH WINDS 5 TO 10 KNOTS VEERING TO THE WEST IN THE
AFTERNOON...THEN BECOMING NORTHWEST 10 TO 15 KNOTS IN THE EVENING.
MOSTLY CLOUDY. SHOWERS AND THUNDERSTORMS LIKELY...THEN A CHANCE OF
SHOWERS LATE IN THE EVENING. WAVES 2 FEET OR LESS.
.FRIDAY...NORTH WINDS 15 TO 20 KNOTS. PARTLY CLOUDY. A CHANCE OF
SHOWERS. WAVES 2 FEET OR LESS.
.SATURDAY...NORTHEAST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. 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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