Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 200754
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
354 AM EDT MON APR 20 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...LOW PRESSURE OF 29.10 INCHES IS LIFTING THROUGH LOWER
MICHIGAN EARLY THIS MORNING. THIS LOW WILL WILL CONTINUE INTO
ONTARIO MONDAY WITH A COLD FRONT SWEEPING EASTWARD ACROSS THE AREA
IN ITS WAKE. THE LOW WILL THEN STALL SOUTH OF HUDSON BAY AND SLOWLY
WEAKEN THROUGH MIDWEEK.

LCZ460-202015-
LAKE ST CLAIR-
354 AM EDT MON APR 20 2015

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.TODAY...SOUTH WINDS 15 TO 20 KNOTS...BECOMING SOUTHWEST 20 TO
25 KNOTS WITH GUSTS TO 30 KNOTS BY MID AFTERNOON. MOSTLY CLOUDY. A
CHANCE OF LIGHT SHOWERS EARLY...THEN LIGHT SHOWERS LIKELY AND A
CHANCE OF THUNDERSTORMS BY LATE MORNING. A CHANCE OF LIGHT SHOWERS
LATE. WAVES 1 TO 3 FEET...BUILDING TO 2 TO 4 FEET LATE.
.TONIGHT...SOUTHWEST WINDS 15 TO 20 KNOTS...DIMINISHING TO 10 TO
15 KNOTS AFTER MIDNIGHT. PARTLY CLOUDY. A CHANCE OF LIGHT SHOWERS
THROUGH MIDNIGHT. WAVES 1 TO 3 FEET.
.TUESDAY...SOUTHWEST WINDS 10 TO 15 KNOTS...INCREASING TO 20 TO 25
KNOTS WITH GUSTS TO 30 KNOTS. PARTLY SUNNY WITH A CHANCE OF LIGHT
SHOWERS. WAVES 1 TO 3 FEET. A SMALL CRAFT ADVISORY MAY BE NEEDED.
.TUESDAY NIGHT...WEST WINDS 15 TO 20 KNOTS...DIMINISHING TO 10 TO
15 KNOTS BY MIDNIGHT. PARTLY CLOUDY THROUGH MIDNIGHT...BECOMING
MOSTLY CLOUDY OVERNIGHT. WAVES 1 TO 3 FEET.
.WEDNESDAY...WEST WINDS 15 TO 20 KNOTS. MOSTLY CLOUDY. WAVES 1 TO
3 FEET.
.THURSDAY...NORTHWEST WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. WAVES
2 FEET OR LESS.
.FRIDAY...NORTH WINDS 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES 2 FEET OR
LESS.

$$

JVC

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



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