Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 231340
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
940 AM EDT SUN AUG 23 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...AS HIGH PRESSURE OF 30.20 INCHES BUILDS FURTHER EAST
INTO SOUTHERN QUEBEC TODAY....LOW PRESSURE OF 29.20 INCHES WILL LIFT
INTO NORTHWESTERN ONTARIO. THIS SYSTEM WILL DRIVE A STRONG COLD
FRONT ACROSS LAKES HURON AND ERIE THIS EVENING. THE LOW WILL THEN
GRADUALLY MEANDER ACROSS NORTHERN ONTARIO MONDAY THROUGH WEDNESDAY
WHILE SLOWLY WEAKENING.

LCZ460-232015-
LAKE ST CLAIR-
940 AM EDT SUN AUG 23 2015

.REST OF TODAY...SOUTH WINDS 5 TO 10 KNOTS...INCREASING TO 10 TO
15 KNOTS BY MID AFTERNOON. MOSTLY SUNNY BY LATE MORNING...THEN
MOSTLY CLOUDY WITH NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS BY
MID AFTERNOON. WAVES 2 FEET OR LESS.
.TONIGHT...SOUTHWEST WINDS 10 TO 15 KNOTS...BECOMING WEST 5 TO
10 KNOTS BY MIDNIGHT...THEN INCREASING TO 10 TO 15 KNOTS AFTER
MIDNIGHT...DIMINISHING TO 5 TO 10 KNOTS LATE. MOSTLY CLOUDY WITH
NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS EARLY IN THE EVENING...
THEN MOSTLY CLEAR BY MIDNIGHT. 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 SHOWERS BY
LATE MORNING. PARTLY CLOUDY THROUGH MIDNIGHT. WAVES 2 FEET OR LESS.
.WEDNESDAY...NORTHWEST WINDS 5 TO 10 KNOTS. PARTLY CLOUDY. WAVES
2 FEET OR LESS.
.THURSDAY...NORTHWEST WINDS 5 TO 10 KNOTS. PARTLY CLOUDY. WAVES
2 FEET OR LESS.

$$

SC

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



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