Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 201340
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
940 AM EDT MON MAR 20 2017

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 28.80 INCHES WILL MOVE OVER OVER HUDSON
BAY AND FORCE A COLD FRONT THROUGH THE AREA TODAY. A SECONDARY COLD
FRONT WILL PUSH DUE SOUTHWARD ACROSS THE REGION ON TUESDAY. IN THE
WAKE OF THIS FRONT...A LARGE AREA OF HIGH PRESSURE AT 30.70 INCHES
WILL GRADUALLY SETTLE INTO THE GREAT LAKES THROUGH THE MIDDLE OF
NEXT WEEK.

LCZ460-202015-
LAKE ST CLAIR-
940 AM EDT MON MAR 20 2017

.REST OF TODAY...SOUTH WINDS 10 TO 15 KNOTS DIMINISHING TO 5 TO 10
KNOTS IN THE AFTERNOON. CLOUDY. A CHANCE OF LIGHT SHOWERS LATE IN
THE AFTERNOON. WAVES 2 FEET OR LESS.
.TONIGHT...LIGHT AND VARIABLE WINDS BECOMING NORTH 5 TO 10 KNOTS
AFTER MIDNIGHT. MOSTLY CLOUDY UNTIL EARLY MORNING BECOMING PARTLY
CLOUDY. A CHANCE OF LIGHT SHOWERS EARLY IN THE EVENING. WAVES 2 FEET
OR LESS.
.TUESDAY...NORTHWEST WINDS 5 TO 10 KNOTS INCREASING TO 10 TO 15
KNOTS LATE IN THE AFTERNOON. PARTLY SUNNY. WAVES 2 FEET OR LESS.
.TUESDAY NIGHT...NORTH WINDS 10 TO 15 KNOTS. MOSTLY CLEAR. WAVES 2
FEET OR LESS.
.WEDNESDAY...NORTH WINDS 10 TO 15 KNOTS BECOMING NORTHEAST 5 TO 10
KNOTS IN THE EVENING. MOSTLY SUNNY UNTIL LATE AFTERNOON BECOMING
CLEAR. WAVES 2 FEET OR LESS.
.THURSDAY...SOUTHEAST WINDS 5 TO 10 KNOTS. MOSTLY CLEAR. WAVES 2
FEET OR LESS.
.FRIDAY...SOUTHWEST WINDS 10 TO 15 KNOTS. RAIN AND SNOW. WAVES 2
FEET OR LESS.

WAVE HEIGHTS ARE FOR ICE FREE AREAS.

$$

SF

EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/DTX/GLFTABLESC

GRAPHICAL MARINE FORECASTS ARE AVAILABLE AT WEATHER.GOV/GREATLAKES



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