Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 221938
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
338 PM EDT SAT AUG 22 2015

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...30.20 INCHES...WILL MOVE FROM THE
EASTERN GREAT LAKES THIS EVENING TO SOUTHERN QUEBEC BY SUNDAY
MORNING. LOW PRESSURE...29.50 INCHES...WILL TRACK FROM THE NORTHERN
PLAINS TODAY TO NORTHWESTERN ONTARIO BY SUNDAY...DEEPENING TO 29.20
INCHES. THIS SYSTEM WILL DRIVE A STRONG COLD FRONT ACROSS LAKES
HURON AND ERIE SUNDAY EVENING. THE LOW WILL GRADUALLY MEANDER ACROSS
NORTHERN ONTARIO MONDAY THROUGH WEDNESDAY WHILE SLOWLY WEAKENING.

LCZ460-230815-
LAKE ST CLAIR-
338 PM EDT SAT AUG 22 2015

.TONIGHT...SOUTHEAST WINDS 5 TO 10 KNOTS. CLEAR. WAVES 2 FEET OR
LESS.
.SUNDAY...SOUTH WINDS 5 TO 10 KNOTS...BECOMING SOUTHWEST 10 TO
15 KNOTS BY MID AFTERNOON. PARTLY SUNNY. A CHANCE OF SHOWERS AND
THUNDERSTORMS BY EARLY AFTERNOON. SHOWERS AND THUNDERSTORMS LIKELY
LATE. WAVES 2 FEET OR LESS.
.SUNDAY NIGHT...WEST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. SHOWERS
AND THUNDERSTORMS LIKELY EARLY IN THE EVENING. WAVES 2 FEET OR LESS.
.MONDAY...WEST WINDS 10 TO 15 KNOTS. MOSTLY SUNNY. WAVES 2 FEET OR
LESS.
.MONDAY NIGHT...WEST WINDS 10 TO 15 KNOTS. MOSTLY CLEAR. WAVES
2 FEET OR LESS.
.TUESDAY...WEST WINDS 10 TO 15 KNOTS...DIMINISHING TO 5 TO 10 KNOTS
THROUGH MIDNIGHT. MOSTLY CLOUDY EARLY...THEN A CHANCE OF LIGHT
SHOWERS BY LATE MORNING. PARTLY CLOUDY THROUGH MIDNIGHT. WAVES
2 FEET OR LESS.
.WEDNESDAY...NORTH WINDS 5 TO 10 KNOTS. PARTLY CLOUDY. WAVES 2 FEET
OR LESS.
.THURSDAY...EAST WINDS 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES 2 FEET OR
LESS.

$$

DRK/SC

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


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