Great Lakes Forecast
Issued by NWS

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000
FZUS63 KDTX 191949
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
346 PM EDT FRI MAY 19 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 30.40 INCHES...WILL SLIDE
ACROSS THE NORTHERN GREAT LAKES THIS AFTERNOON AND TONIGHT. THE NEXT
LOW PRESSURE SYSTEM...AVERAGING 29.70 INCHES...WILL THEN LIFT
NORTHEAST THROUGH THE WESTERN GREAT LAKES SATURDAY INTO
SUNDAY...BRINGING THE CHANCE FOR RAIN AND THUNDERSTORMS.

LCZ460-200800-
LAKE ST CLAIR-
346 PM EDT FRI MAY 19 2017

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