917
FZUS63 KDTX 152021
GLFSC
LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
321 PM 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 THIS
EVENING. WEAK HIGH PRESSURE, 30.20 INCHES WILL MOVE ACROSS THE
REGION EARLY TUESDAY BEFORE A STRONGER SYSTEM, 29.70 INCHES,
APPROACHES THE NORTHERN GREAT LAKES FROM THE WEST LATE TUESDAY
INTO WEDNESDAY. A EVEN STRONGER SYSTEM WILL AFFECT THE REGION
THURSDAY INTO FRIDAY.
LCZ460-160430-
LAKE ST CLAIR-
321 PM EST MON DEC 15 2025
TONIGHT
SOUTHWEST WINDS 15 TO 20 KNOTS DIMINISHING TO 5 TO 10
KNOTS. PARTLY CLOUDY. WAVES 1 TO 3 FEET.
TUESDAY
SOUTHWEST WINDS 10 TO 15 KNOTS INCREASING TO 15 TO 20
KNOTS IN THE AFTERNOON. PARTLY SUNNY. WAVES 1 TO 3 FEET.
TUESDAY NIGHT
SOUTHWEST WINDS TO 30 KNOTS. PARTLY CLOUDY EARLY IN
THE EVENING BECOMING MOSTLY CLOUDY. WAVES 3 TO 5 FEET. WAVES
OCCASIONALLY AROUND 7 FEET.
WEDNESDAY
SOUTHWEST WINDS 20 TO 25 KNOTS BECOMING WEST 10 TO 15
KNOTS. PARTLY SUNNY. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET IN
THE LATE MORNING AND AFTERNOON.
WEDNESDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KNOTS BECOMING SOUTH 20
TO 25 KNOTS. PARTLY CLOUDY EARLY IN THE EVENING BECOMING MOSTLY
CLOUDY. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET AFTER MIDNIGHT.
THURSDAY
SOUTH WINDS 20 TO 25 KNOTS BECOMING SOUTHWEST TO 30
KNOTS IN THE AFTERNOON AND EVENING. GUSTS TO 35 KNOT GALES. LIGHT
RAIN...THEN LIGHT RAIN AND A CHANCE OF LIGHT SNOW IN THE EVENING.
WAVES 4 TO 6 FEET. WAVES OCCASIONALLY AROUND 8 FEET. A GALE WARNING
MAY BE NEEDED.
FRIDAY
WEST WINDS TO 30 KNOTS. PARTLY CLOUDY. WAVES 4 TO 6 FEET.
WAVES OCCASIONALLY AROUND 8 FEET.
SATURDAY
SOUTHWEST WINDS 15 TO 20 KNOTS. MOSTLY CLOUDY WITH A
CHANCE OF LIGHT RAIN. WAVES 2 TO 4 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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