Great Lakes Forecast
Issued by NWS

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000
FZUS63 KDTX 211403
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1000 AM EDT SUN SEP 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...A COLD FRONT AVERAGING 29.60 INCHES WILL SLOWLY WORK
THROUGH THE CENTRAL GREAT LAKES TODAY...TRIGGERING SHOWERS AND
STRONG THUNDERSTORMS THROUGH THIS EVENING BEFORE THE WIND TURNS FROM
THE NORTH AND BRING COOLER AND LESS HUMID AIR BACK INTO THE REGION.
THE NORTHERLY FLOW WILL BUILD WAVES OVER THE SOUTH HALF OF LAKE
HURON UNTIL HIGH PRESSURE SETTLES IN FOR THE MIDDLE OF THE WEEK.

LCZ460-212000-
LAKE ST CLAIR-
1000 AM EDT SUN SEP 21 2014

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.REST OF TODAY...WEST WINDS 15 TO 20 KNOTS WITH GUSTS TO 25
KNOTS...BECOMING NORTHWEST. SHOWERS AND A CHANCE OF THUNDERSTORMS.
WAVES 1 TO 3 FEET.
.TONIGHT...NORTH WINDS 15 TO 20 KNOTS...DIMINISHING TO 10 TO
15 KNOTS LATE. A CHANCE OF LIGHT SHOWERS EARLY IN THE EVENING.
MOSTLY CLOUDY. WAVES 2 FEET OR LESS.
.MONDAY...NORTHWEST WINDS 10 TO 15 KNOTS...DIMINISHING TO 5 TO
10 KNOTS BY MID AFTERNOON. PARTLY SUNNY. WAVES 2 FEET OR LESS.
.MONDAY NIGHT...WEST WINDS 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES 2 FEET
OR LESS.
.TUESDAY...WEST WINDS 5 TO 10 KNOTS...BACKING TO THE SOUTHEAST
THROUGH MIDNIGHT. MOSTLY SUNNY...BECOMING SUNNY BY LATE MORNING...
BECOMING MOSTLY SUNNY...BECOMING SUNNY LATE...BECOMING MOSTLY CLEAR.
WAVES 2 FEET OR LESS.
.WEDNESDAY...SOUTHEAST WINDS 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES
2 FEET OR LESS.
.THURSDAY...SOUTHEAST WINDS 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES
2 FEET OR LESS.

$$

DG

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





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