Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 181936
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
335 PM EDT THU SEP 18 2014

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 OF 30.30 INCHES CENTERED OVER THE CENTRAL
GREAT LAKES THIS EVENING WILL DRIFT EASTWARD OVERNIGHT INTO
TOMORROW. THE NEXT LOW PRESSURE SYSTEM...AVERAGING 29.50
INCHES...WILL THEN SLIDE ACROSS CENTRAL CANADA AND THE NORTHERN
GREAT LAKES REGION FRIDAY NIGHT THROUGH SUNDAY MORNING. THIS LOW AND
COLD FRONT WILL TRIGGER SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS.

LCZ460-190800-
LAKE ST CLAIR-
335 PM EDT THU SEP 18 2014

.TONIGHT...NORTHEAST WINDS 10 TO 15 KNOTS...BECOMING LIGHT AND
VARIABLE OVERNIGHT. MOSTLY CLEAR. WAVES 2 FEET OR LESS.
.FRIDAY...SOUTHEAST WINDS 5 TO 10 KNOTS. MOSTLY SUNNY. WAVES 2 FEET
OR LESS.
.FRIDAY NIGHT...SOUTH WINDS 5 TO 10 KNOTS...INCREASING TO 10 TO
15 KNOTS LATE. MOSTLY CLEAR. WAVES 2 FEET OR LESS.
.SATURDAY...SOUTHWEST WINDS 10 TO 15 KNOTS...INCREASING TO 15 TO
20 KNOTS BY LATE MORNING. A CHANCE OF SHOWERS LATE. PARTLY SUNNY.
WAVES 1 TO 3 FEET.
.SATURDAY NIGHT...SOUTHWEST WINDS 10 TO 15 KNOTS...INCREASING TO
15 TO 20 KNOTS BY MIDNIGHT...THEN DIMINISHING TO 10 TO 15 KNOTS
AFTER MIDNIGHT. CLOUDY WITH SHOWERS LIKELY. WAVES 2 FEET OR LESS.
.SUNDAY...NORTHWEST WINDS 10 TO 15 KNOTS. PARTLY SUNNY WITH A CHANCE
OF SHOWERS...THEN PARTLY CLOUDY THROUGH MIDNIGHT. WAVES 2 FEET OR
LESS.
.MONDAY...NORTHWEST WINDS 10 TO 15 KNOTS. MOSTLY CLEAR. WAVES 2 FEET
OR LESS.
.TUESDAY...NORTHEAST WINDS 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES 2 FEET
OR LESS.

$$

SF

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






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