Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 202037
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
337 PM EST THU NOV 20 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...LOW PRESSURE....AVERAGING 29.50 INCHES...OVER WESTERN
QUEBEC WILL TRACK TOWARD THE CANADIAN MARITIMES TONIGHT WHILE AN
ASSOCIATED SURFACE TROUGH PASSES THROUGH THE EASTERN GREAT LAKES.
THEN HIGH PRESSURE...AVERAGING 30.50 INCHES...WILL BUILD ACROSS THE
OHIO VALLEY ON FRIDAY...AND TO THE EASTERN SEABOARD ON SATURDAY.

LCZ460-210915-
LAKE ST CLAIR-
337 PM EST THU NOV 20 2014

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 PM EST THIS EVENING...

.TONIGHT...WEST WINDS 15 TO 20 KNOTS...DIMINISHING TO 10 TO 15 KNOTS
AFTER MIDNIGHT. SCATTERED LIGHT SNOW SHOWERS IN THE EVENING. PARTLY
CLOUDY. WAVES 1 TO 3 FEET.
.FRIDAY...WEST WINDS 10 TO 15 KNOTS...DIMINISHING TO 5 TO 10 KNOTS
IN THE AFTERNOON...THEN BECOMING SOUTHWEST 10 TO 15 KNOTS LATE.
MOSTLY SUNNY. WAVES 2 FEET OR LESS.
.FRIDAY NIGHT...SOUTHWEST WINDS 10 TO 15 KNOTS...BECOMING SOUTH
15 TO 20 KNOTS LATE. PARTLY CLOUDY MAINLY BEFORE MIDNIGHT...THEN
MOSTLY CLOUDY WITH A CHANCE OF LIGHT SNOW SHOWERS AND LIGHT FREEZING
RAIN LATE. WAVES 1 TO 3 FEET.
.SATURDAY...SOUTHWEST WINDS 15 TO 20 KNOTS. A CHANCE OF LIGHT
SHOWERS AND LIGHT FREEZING RAIN EARLY...THEN A CHANCE OF LIGHT
SHOWERS. CLOUDY. WAVES 1 TO 3 FEET.
.SATURDAY NIGHT...SOUTHWEST WINDS 15 TO 20 KNOTS...DIMINISHING TO
10 TO 15 KNOTS AFTER MIDNIGHT. A CHANCE OF LIGHT SHOWERS IN THE
EVENING...THEN LIGHT SHOWERS LIKELY AFTER MIDNIGHT. CLOUDY. WAVES
1 TO 3 FEET.
.SUNDAY...SOUTH WINDS 10 TO 15 KNOTS...BECOMING SOUTHEAST 15 TO
20 KNOTS BY EVENING. LIGHT SHOWERS LIKELY...THEN SHOWERS BY EVENING.
WAVES 1 TO 3 FEET.
.MONDAY...SOUTHWEST WINDS 20 TO 25 KNOTS. SHOWERS AND A CHANCE OF
LIGHT SNOW SHOWERS. WAVES 1 TO 3 FEET. A SMALL CRAFT ADVISORY MAY BE
NEEDED.
.TUESDAY...WEST WINDS 20 TO 25 KNOTS. MOSTLY CLOUDY WITH A CHANCE OF
LIGHT RAIN AND SNOW SHOWERS. WAVES 1 TO 3 FEET.

$$

JVC

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


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