Great Lakes Forecast
Issued by NWS

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000
FZUS63 KDTX 022243 AAA
GLFSC

LAKE ST CLAIR FORECAST...UPDATED
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
639 PM EDT SUN AUG 2 2015

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 TROUGH OF LOW PRESSURE...DEEPENING TO 29.50
INCHES...WILL TRACK ACROSS LAKE HURON TONIGHT. THIS WILL PUSH A COLD
FRONT DOWN THROUGH THE CENTRAL GREAT LAKES...TRIGGERING SHOWERS AND
THUNDERSTORMS THIS EVENING AND TONIGHT. SOME OF THESE STORMS MAY
BECOME SEVERE. THE TROUGH WILL MOVE EAST MONDAY...GRADUALLY ALLOWING
HIGH PRESSURE TO BUILD INTO THE AREA BY WEDNESDAY.

LCZ460-030800-
LAKE ST CLAIR-
639 PM EDT SUN AUG 2 2015

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EDT MONDAY...
...SEVERE THUNDERSTORM WATCH 463 IN EFFECT UNTIL 2 AM EDT MONDAY...

.TONIGHT...SOUTHWEST WINDS 15 TO 20 KNOTS...DIMINISHING TO 10 TO
15 KNOTS LATE. PARTLY CLOUDY...BECOMING MOSTLY CLOUDY AFTER
MIDNIGHT...BECOMING PARTLY CLOUDY. SHOWERS AND THUNDERSTORMS LIKELY
THROUGH MIDNIGHT...THEN A CHANCE OF SHOWERS AND THUNDERSTORMS AFTER
MIDNIGHT. SOME THUNDERSTORMS MAY BE SEVERE WITH DAMAGING WINDS AND
LARGE HAIL. WAVES 1 TO 3 FEET.
.MONDAY...SOUTHWEST WINDS 10 TO 15 KNOTS...VEERING TO THE NORTHWEST
BY MID AFTERNOON. PARTLY SUNNY. A CHANCE OF SHOWERS AND
THUNDERSTORMS EARLY. WAVES 2 FEET OR LESS.
.MONDAY NIGHT...NORTHWEST WINDS 10 TO 15 KNOTS...BECOMING WEST 5 TO
10 KNOTS AFTER MIDNIGHT. PARTLY CLOUDY. WAVES 2 FEET OR LESS.
.TUESDAY...WEST WINDS 5 TO 10 KNOTS...INCREASING TO 10 TO 15 KNOTS
BY LATE MORNING...THEN BECOMING NORTHWEST 5 TO 10 KNOTS LATE. PARTLY
SUNNY. WAVES 2 FEET OR LESS.
.TUESDAY NIGHT...NORTHWEST WINDS 5 TO 10 KNOTS. PARTLY CLOUDY. WAVES
2 FEET OR LESS.
.WEDNESDAY...NORTH WINDS 5 TO 10 KNOTS...VEERING TO THE NORTHEAST
THROUGH MIDNIGHT. MOSTLY SUNNY...BECOMING PARTLY CLOUDY. WAVES
2 FEET OR LESS.
.THURSDAY...NORTHEAST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. A CHANCE
OF LIGHT SHOWERS. WAVES 2 FEET OR LESS.
.FRIDAY...NORTHEAST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. A CHANCE OF
LIGHT SHOWERS. WAVES 2 FEET OR LESS.

$$

DG

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



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