Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 230155
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
947 PM EDT MON MAY 22 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...A LOW PRESSURE SYSTEM...AVERAGING 29.70 INCHES..
POSITIONED OVER ONTARIO WILL LIFT SLOWLY NORTHEASTWARD INTO QUEBEC
TONIGHT. MEANWHILE HIGH PRESSURE...AVERAGING 30.00 INCHES...OVER THE
OHIO VALLEY WILL BUILD INTO THE EASTERN GREAT LAKES TONIGHT.
A SECOND WEAK AREA OF LOW PRESSURE DEVELOPING NEAR SOUTHERN LAKE
MICHIGAN ON TUESDAY WILL STRENGTHEN AS IT MOVES SOUTHEASTWARD OVER
THE OHIO VALLEY TUESDAY NIGHT.

LCZ460-230800-
LAKE ST CLAIR-
947 PM EDT MON MAY 22 2017

.REST OF TONIGHT...SOUTHWEST WINDS 5 TO 10 KNOTS. PARTLY CLOUDY.
WAVES 2 FEET OR LESS.
.TUESDAY...SOUTHWEST WINDS 5 TO 10 KNOTS EARLY IN THE MORNING
BECOMING LIGHT AND VARIABLE. PARTLY SUNNY. WAVES 2 FEET OR LESS.
.TUESDAY NIGHT...LIGHT AND VARIABLE WINDS BECOMING NORTHEAST 5 TO 10
KNOTS IN THE LATE EVENING AND OVERNIGHT. PARTLY CLOUDY EARLY IN THE
EVENING BECOMING MOSTLY CLOUDY. WAVES 2 FEET OR LESS.
.WEDNESDAY...EAST WINDS 5 TO 10 KNOTS INCREASING TO 10 TO 15 KNOTS
LATE IN THE AFTERNOON. MOSTLY CLOUDY. SHOWERS LIKELY IN THE
AFTERNOON. A CHANCE OF THUNDERSTORMS LATE IN THE AFTERNOON. WAVES 2
FEET OR LESS.
.WEDNESDAY NIGHT...EAST WINDS 10 TO 15 KNOTS DIMINISHING TO 5 TO 10
KNOTS EARLY IN THE MORNING. MOSTLY CLOUDY WITH SHOWERS LIKELY AND A
CHANCE OF THUNDERSTORMS. WAVES 2 FEET OR LESS.
.THURSDAY...NORTHEAST WINDS 5 TO 10 KNOTS BACKING TO THE NORTH IN
THE EVENING. MOSTLY CLOUDY BECOMING PARTLY CLOUDY. LIGHT SHOWERS
LIKELY AND A CHANCE OF THUNDERSTORMS EARLY IN THE MORNING...THEN A
CHANCE OF LIGHT SHOWERS UNTIL EARLY EVENING. WAVES 2 FEET OR LESS.
.FRIDAY...NORTHWEST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. WAVES 2
FEET OR LESS.
.SATURDAY...SOUTHEAST WINDS 5 TO 10 KNOTS. PARTLY CLOUDY. WAVES 2
FEET OR LESS.

$$

CB

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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