Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 201941
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
341 PM 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...A COLD FRONT IS EXPECTED TO PUSH THROUGH THE GREAT LAKES
FROM NORTH TO SOUTH THROUGHOUT TUESDAY...SWIFTLY CHANGING WIND
DIRECTION FROM SOUTHERLY TO NORTHERLY BY EARLY TUESDAY 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 ON TUESDAY...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.

LCZ460-210815-
LAKE ST CLAIR-
341 PM EDT MON MAR 20 2017

.TONIGHT...LIGHT AND VARIABLE WINDS BECOMING NORTH 5 TO 10 KNOTS
EARLY IN THE MORNING. MOSTLY CLOUDY. SCATTERED LIGHT SHOWERS IN THE
EVENING. WAVES 2 FEET OR LESS.
.TUESDAY...NORTHWEST WINDS 5 TO 10 KNOTS BECOMING WEST 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. 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
PARTLY CLOUDY. WAVES 2 FEET OR LESS.
.FRIDAY...SOUTHWEST WINDS 10 TO 15 KNOTS. RAIN AND SNOW. WAVES 2
FEET OR LESS.
.SATURDAY...EAST WINDS 10 TO 15 KNOTS. MOSTLY CLOUDY WITH RAIN
LIKELY. WAVES 2 FEET OR LESS.

$$

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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