Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 211344
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
944 AM EDT TUE MAR 21 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...A COLD FRONT IS EXPECTED TO PUSH THROUGH THE GREAT LAKES
FROM NORTH TO SOUTH TODAY...SWIFTLY CHANGING WIND DIRECTION FROM
SOUTHERLY TO NORTHERLY THIS MORNING. WINDS ARE EXPECTED TO REMAIN
FROM THE WEST TO NORTHWEST THROUGHOUT TUESDAY AS CONDITIONS START TO
DRY OUT. HIGH PRESSURE...30.70 INCHES...WILL PUSH SOUTHEAST FROM
MANITOBA...AND WILL SITUATE OVER THE GREAT LAKES BY LATE
WEDNESDAY...WEAKENING SLIGHTLY TO 30.60 INCHES. PRESSURE WILL
GRADUALLY DIMINISH DOWN TO 30.30 INCHES LATE THURSDAY...BEFORE LOW
PRESSURE BRINGS THE NEXT CHANCE FOR PRECIPITATION EARLY FRIDAY.

LCZ460-212015-
LAKE ST CLAIR-
944 AM EDT TUE MAR 21 2017

...SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM EDT THIS AFTERNOON
THROUGH WEDNESDAY MORNING...

.REST OF TODAY...WEST WINDS 5 TO 10 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS LATE IN THE AFTERNOON. MOSTLY SUNNY. WAVES 2 FEET OR LESS.
.TONIGHT...NORTH WINDS 15 TO 20 KNOTS. MOSTLY CLEAR. WAVES 1 TO 3
FEET.
.WEDNESDAY...NORTH WINDS 15 TO 20 KNOTS DIMINISHING TO 5 TO 10
KNOTS. MOSTLY SUNNY. WAVES 2 FEET OR LESS.
.WEDNESDAY NIGHT...NORTHEAST WINDS 5 TO 10 KNOTS IN THE EVENING
BECOMING LIGHT AND VARIABLE. CLEAR. WAVES 2 FEET OR LESS.
.THURSDAY...SOUTHEAST WINDS 5 TO 10 KNOTS. MOSTLY SUNNY BECOMING
SUNNY LATE IN THE MORNING BECOMING MOSTLY SUNNY BECOMING PARTLY
CLOUDY IN THE EVENING. WAVES 2 FEET OR LESS.
.FRIDAY...SOUTHWEST WINDS 5 TO 10 KNOTS. RAIN. WAVES 2 FEET OR LESS.
.SATURDAY...EAST WINDS 10 TO 15 KNOTS. CLOUDY WITH RAIN LIKELY.
WAVES 2 FEET OR LESS.

$$

DRK

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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