Great Lakes Forecast
Issued by NWS

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000
FZUS63 KDTX 211449
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
949 AM EST FRI NOV 21 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...MEASURING 30.50 INCHES...WILL SET UP
OVER THE OHIO VALLEY TODAY BEFORE SHIFTING TO THE EASTERN SEABOARD
TONIGHT. THE CENTRAL GREAT LAKES WILL REMAIN BETWEEN THIS HIGH AND
LOW PRESSURE OF 29.40 INCHES TRACKING ACROSS CENTRAL ONTARIO ON
SATURDAY.  A STRENGTHENING LOW PRESSURE SYSTEM WILL THEN LIFT
NORTHEAST AND INTO THE GREAT LAKES SUNDAY AND SUNDAY NIGHT.

LCZ460-212115-
LAKE ST CLAIR-
949 AM EST FRI NOV 21 2014

.REST OF TODAY...WEST WINDS 5 TO 10 KNOTS...BECOMING SOUTHWEST 10 TO
15 KNOTS LATE. MOSTLY SUNNY. WAVES 2 FEET OR LESS.
.TONIGHT...SOUTHWEST WINDS 10 TO 15 KNOTS...INCREASING TO 15 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF LIGHT FREEZING RAIN...LIGHT
SNOW SHOWERS AND LIGHT SLEET LATE. MOSTLY CLEAR MAINLY BEFORE
MIDNIGHT...BECOMING MOSTLY CLOUDY OVERNIGHT. WAVES 2 FEET OR LESS.
.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
2 FEET OR LESS.
.SUNDAY...SOUTH WINDS 10 TO 15 KNOTS...BECOMING SOUTHEAST 15 TO
20 KNOTS BY EVENING. LIGHT SHOWERS LIKELY...THEN LIGHT SHOWERS BY
EVENING. WAVES 1 TO 3 FEET.
.MONDAY...SOUTHWEST WINDS 20 TO 25 KNOTS. LIGHT SHOWERS AND A CHANCE
OF LIGHT SNOW SHOWERS. WAVES 1 TO 3 FEET. A SMALL CRAFT ADVISORY MAY
BE NEEDED.
.TUESDAY...WEST WINDS 15 TO 20 KNOTS. MOSTLY CLOUDY WITH A CHANCE OF
LIGHT RAIN AND SNOW SHOWERS. WAVES 1 TO 3 FEET.

$$

HLO

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



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