107
FZUS63 KDTX 151435
GLFSC
LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
935 AM EST MON DEC 15 2025
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, 29.90 INCHES, OVER NORTHEASTERN ONTARIO
WILL DRAG A COLD FRONT ACROSS THE CENTRAL GREAT LAKES REGION
TODAY. WEAK HIGH PRESSURE, 30.20 INCHES WILL MOVE ACROSS THE
REGION EARLY TUESDAY BEFORE A STRONGER SYSTEM APPROACHES FROM THE
WEST LATE TUESDAY INTO WEDNESDAY. A EVEN STRONGER SYSTEM WILL
AFFECT THE REGION THURSDAY INTO FRIDAY.
LCZ460-152245-
LAKE ST CLAIR-
935 AM EST MON DEC 15 2025
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM EST THIS AFTERNOON
REST OF TODAY
SOUTHWEST WINDS 20 TO 25 KNOTS WITH GUSTS TO 30
KNOTS. MOSTLY CLOUDY. A CHANCE OF LIGHT SNOW SHOWERS IN THE LATE
MORNING AND EARLY AFTERNOON. WAVES 1 TO 3 FEET.
TONIGHT
SOUTHWEST WINDS 20 TO 25 KNOTS DIMINISHING TO 10 TO 15
KNOTS. PARTLY CLOUDY. WAVES 1 TO 3 FEET.
TUESDAY
SOUTHWEST WINDS 10 TO 15 KNOTS INCREASING TO 15 TO 20
KNOTS IN THE LATE MORNING AND AFTERNOON. PARTLY SUNNY. WAVES 1 TO 3
FEET.
TUESDAY NIGHT
SOUTHWEST WINDS 20 TO 25 KNOTS WITH GUSTS TO 30
KNOTS INCREASING TO 30 KNOTS IN THE LATE EVENING AND EARLY
MORNING...THEN DIMINISHING TO 20 TO 25 KNOTS AFTER MIDNIGHT. PARTLY
CLOUDY EARLY IN THE EVENING BECOMING MOSTLY CLOUDY. WAVES 3 TO 5
FEET. WAVES OCCASIONALLY AROUND 7 FEET.
WEDNESDAY
WEST WINDS 15 TO 20 KNOTS DIMINISHING TO 10 TO 15 KNOTS
IN THE AFTERNOON...THEN BECOMING SOUTH 15 TO 20 KNOTS IN THE
EVENING. MOSTLY CLOUDY IN THE MORNING BECOMING PARTLY CLOUDY. WAVES
2 TO 4 FEET SUBSIDING TO 2 FEET OR LESS IN THE AFTERNOON AND
EVENING.
THURSDAY
SOUTHWEST TO 35 KNOT GALES. LIGHT RAIN AND A CHANCE
OF LIGHT SNOW. WAVES 4 TO 6 FEET. WAVES OCCASIONALLY AROUND 8
FEET. A GALE WARNING MAY BE NEEDED.
FRIDAY
SOUTHWEST TO 35 KNOT GALES WITH GUSTS TO 40 KNOT GALES.
PARTLY CLOUDY. WAVES 4 TO 6 FEET. WAVES OCCASIONALLY AROUND 8
FEET.
WAVE HEIGHTS ARE FOR ICE FREE AREAS.
MANN
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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