Great Lakes Forecast
Issued by NWS

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000
FZUS63 KDTX 200750 RRA
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
348 AM EDT SAT MAY 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...SOUTHERN EDGE OF HIGH PRESSURE...AVERAGING 30.30
INCHES OVER THE EASTERN GREAT LAKES...WILL HOLD THROUGH MOST OF THE
DAY TODAY. THE NEXT LOW PRESSURE SYSTEM...AVERAGING 29.70
INCHES...WILL THEN LIFT NORTHEAST THROUGH THE WESTERN GREAT LAKES
SATURDAY NIGHT AND SUNDAY...BRINGING THE CHANCE FOR RAIN AND
THUNDERSTORMS.

LCZ460-202000-
LAKE ST CLAIR-
348 AM EDT SAT MAY 20 2017

.TODAY...NORTHEAST WINDS 10 TO 15 KNOTS BECOMING EAST 15 TO 20 KNOTS
IN THE LATE MORNING AND EARLY AFTERNOON...THEN DIMINISHING TO 10 TO
15 KNOTS LATE IN THE AFTERNOON. MOSTLY CLOUDY. A CHANCE OF SHOWERS
AND THUNDERSTORMS LATE IN THE AFTERNOON. WAVES 1 TO 3 FEET.
.TONIGHT...EAST WINDS 10 TO 15 KNOTS INCREASING TO 15 TO 20 KNOTS IN
THE LATE EVENING AND EARLY MORNING...THEN BECOMING SOUTHEAST 10 TO
15 KNOTS EARLY IN THE MORNING. A CHANCE OF SHOWERS AND THUNDERSTORMS
IN THE EVENING...THEN LIGHT SHOWERS AND A CHANCE OF THUNDERSTORMS
AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
.SUNDAY...SOUTH WINDS 10 TO 15 KNOTS. SHOWERS AND A CHANCE OF
THUNDERSTORMS UNTIL LATE AFTERNOON...THEN A CHANCE OF SHOWERS AND
THUNDERSTORMS LATE IN THE AFTERNOON. WAVES 2 FEET OR LESS.
.SUNDAY NIGHT...WEST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. A CHANCE
OF SHOWERS AND THUNDERSTORMS EARLY IN THE EVENING. WAVES 2 FEET OR
LESS.
.MONDAY...SOUTHWEST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY BECOMING
MOSTLY CLEAR. WAVES 2 FEET OR LESS.
.TUESDAY...SOUTHEAST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. A CHANCE
OF SHOWERS. WAVES 2 FEET OR LESS.
.WEDNESDAY...NORTH WINDS 5 TO 10 KNOTS. MOSTLY CLOUDY WITH A CHANCE
OF SHOWERS. WAVES 2 FEET OR LESS.

$$

MR

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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