Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 201954 RRA
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
346 PM 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 MOVE EAST TONIGHT OVER
NEW ENGLAND. THE NEXT LOW PRESSURE SYSTEM...AVERAGING 29.70
INCHES...WILL THEN LIFT NORTHEAST THROUGH THE WESTERN GREAT LAKES
TONIGHT AND SUNDAY...BRINGING THE CHANCE FOR RAIN AND THUNDERSTORMS.

LCZ460-210800-
LAKE ST CLAIR-
346 PM EDT SAT MAY 20 2017

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

$$

HLO

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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