376
FZUS61 KBUF 120835
GLFLO
OPEN LAKE FORECAST FOR LAKE ONTARIO
NATIONAL WEATHER SERVICE BUFFALO NY
435 AM EDT THU MAR 12 2026
FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE ONTARIO
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 WILL DEEPEN TO 29.2 INCHES AS IT MOVES FROM
SOUTHERN QUEBEC TO THE CANADIAN MARITIMES THIS EVENING. A RIDGE OF
HIGH PRESSURE AVERAGING 30.1 INCHES WILL THEN BUILD INTO THE OHIO
VALLEY AND LOWER GREAT LAKES THIS AFTERNOON AND EVENING BEFORE
DRIFTING TO THE EASTERN SEABOARD FRIDAY. A 29.0 INCH LOW WILL THEN
MOVE FROM THE UPPER GREAT LAKES FRIDAY MORNING TO THE OTTAWA VALLEY
FRIDAY NIGHT WHILE WEAKENING TO 29.4 INCHES. THIS LOW WILL CONTINUE
EAST TO THE CANADIAN MARITIMES SATURDAY AS A 30.3 INCH HIGH BUILDS
INTO THE LOWER GREAT LAKES. A 30.3 INCH SURFACE HIGH WILL RIDGE
ACROSS THE LAKE SATURDAY NIGHT, AND MOVE EAST OF THE LAKE SUNDAY.
MEANWHILE, A 29.5 INCH SURFACE LOW OVER THE MID MISSISSIPPI VALLEY
SUNDAY MORNING WILL TRACK NORTHEASTWARD AND DEEPEN TO 28.9 INCHES
JUST TO THE WEST OF THE LAKE MONDAY MORNING.
LOZ062-121500-
LAKE ONTARIO OPEN WATERS FROM THE NIAGARA RIVER TO HAMLIN BEACH-
435 AM EDT THU MAR 12 2026
..GALE WARNING IN EFFECT UNTIL 8 AM EDT THIS MORNING
...GALE WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY
MORNING...
TODAY
WEST WINDS TO 30 KNOTS BECOMING NORTHWEST. A CHANCE OF
SNOW SHOWERS EARLY THIS AFTERNOON. WAVES 9 TO 12 FEET SUBSIDING
TO 5 TO 8 FEET. WAVES OCCASIONALLY AROUND 15 FEET.
TONIGHT
NORTHWEST WINDS 15 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS. WAVES 3 TO 6 FEET SUBSIDING TO 1 TO 2 FEET.
FRIDAY
SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST TO
30 KNOTS. SNOW SHOWERS IN THE MORNING, THEN RAIN AND SNOW SHOWERS
IN THE AFTERNOON. WAVES 1 TO 3 FEET BUILDING TO 5 TO 9 FEET.
WAVES OCCASIONALLY AROUND 11 FEET.
FRIDAY NIGHT
SOUTHWEST WINDS TO 30 KNOTS BECOMING WEST AND
INCREASING TO 40 KNOT GALES OVERNIGHT. RAIN SHOWERS WITH A CHANCE
OF SNOW SHOWERS IN THE EVENING, THEN A CHANCE OF SNOW SHOWERS
OVERNIGHT. WAVES 7 TO 10 FEET BUILDING TO 13 TO 18 FEET. WAVES
OCCASIONALLY AROUND 23 FEET.
SATURDAY
WEST GALES TO 35 KNOTS BECOMING NORTHEAST AND
DIMINISHING TO 10 TO 15 KNOTS. A CHANCE OF SNOW SHOWERS SATURDAY
NIGHT. WAVES 12 TO 16 FEET SUBSIDING TO 1 TO 3 FEET. WAVES
OCCASIONALLY AROUND 20 FEET.
SUNDAY
EAST WINDS 15 TO 20 KNOTS BECOMING SOUTHEAST AND
INCREASING TO 30 KNOTS. SNOW SHOWERS WITH RAIN SHOWERS LIKELY.
WAVES 3 TO 5 FEET BUILDING TO 7 TO 11 FEET. WAVES OCCASIONALLY
AROUND 14 FEET.
MONDAY
SOUTH GALES TO 35 KNOTS BECOMING WEST TO 40 KNOTS. RAIN
SHOWERS WITH A CHANCE OF SNOW SHOWERS DURING THE DAY, THEN A
CHANCE OF SNOW AND RAIN SHOWERS MONDAY NIGHT. WAVES 8 TO 11 FEET
BUILDING TO 14 TO 19 FEET. WAVES OCCASIONALLY AROUND 24 FEET.
LOZ063>065-121500-
LAKE ONTARIO OPEN WATERS FROM HAMLIN BEACH TO THE SAINT LAWRENCE
RIVER-
435 AM EDT THU MAR 12 2026
..GALE WARNING IN EFFECT UNTIL 11 AM EDT THIS MORNING
...GALE WATCH IN EFFECT FROM FRIDAY EVENING THROUGH SATURDAY
AFTERNOON...
TODAY
WEST WINDS TO 30 KNOTS. A CHANCE OF SNOW SHOWERS THIS
MORNING. WAVES 10 TO 14 FEET SUBSIDING TO 8 TO 11 FEET. WAVES
OCCASIONALLY AROUND 18 FEET.
TONIGHT
NORTHWEST WINDS TO 30 KNOTS BECOMING WEST AND
DIMINISHING TO 5 TO 15 KNOTS AFTER MIDNIGHT. WAVES 7 TO 10 FEET
SUBSIDING TO 2 TO 4 FEET. WAVES OCCASIONALLY AROUND 13 FEET.
FRIDAY
SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST TO
30 KNOTS. SNOW SHOWERS IN THE MORNING, THEN RAIN AND SNOW SHOWERS
IN THE AFTERNOON. WAVES 2 FEET OR LESS BUILDING TO 5 TO 8 FEET.
WAVES OCCASIONALLY AROUND 10 FEET.
FRIDAY NIGHT
SOUTHWEST WINDS TO 30 KNOTS BECOMING WEST AND
INCREASING TO 40 KNOT GALES OVERNIGHT. RAIN SHOWERS WITH SNOW
SHOWERS LIKELY. WAVES 7 TO 10 FEET BUILDING TO 16 TO 21 FEET.
WAVES OCCASIONALLY AROUND 27 FEET.
SATURDAY
WEST GALES TO 40 KNOTS BECOMING NORTH AND DIMINISHING
TO 5 TO 10 KNOTS. SNOW SHOWERS LIKELY DURING THE DAY. WAVES 16 TO
21 FEET SUBSIDING TO 2 TO 4 FEET. WAVES OCCASIONALLY AROUND
27 FEET.
SUNDAY
EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST AND
INCREASING TO 40 KNOT GALES. SNOW SHOWERS LIKELY DURING THE DAY,
THEN A CHANCE OF RAIN AND SNOW SHOWERS LIKELY SUNDAY NIGHT. WAVES
2 TO 4 FEET BUILDING TO 9 TO 12 FEET. WAVES OCCASIONALLY AROUND
15 FEET.
MONDAY
SOUTH GALES TO 40 KNOTS BECOMING WEST. RAIN AND SNOW
SHOWERS. WAVES 9 TO 12 FEET BUILDING TO 15 TO 19 FEET. WAVES
OCCASIONALLY AROUND 24 FEET.
LOZ061-121500-
MAFOR 1209/
ONTARIO WEST 1/2...GALE WARNING IN EFFECT...12640 12630 11730
11720 11610 11500. WAVES 10 TO 13 FEET SUBSIDING TO 5 TO 9 FEET,
AND OCCASIONALLY AROUND 16 FEET TODAY. WAVES 4 TO 7 FEET
SUBSIDING TO 1 TO 3 FEET, AND OCCASIONALLY AROUND 9 FEET TONIGHT.
ONTARIO EAST 1/2...GALE WARNING IN EFFECT...14640 11740 11730
11720 11600. A CHANCE OF SNOW AND RAIN SHOWERS EARLY, THEN A
CHANCE OF SNOW SHOWERS THIS MORNING. WAVES 10 TO 15 FEET
SUBSIDING TO 8 TO 11 FEET, AND OCCASIONALLY AROUND 19 FEET TODAY.
WAVES 7 TO 10 FEET SUBSIDING TO 2 TO 4 FEET, AND OCCASIONALLY
AROUND 13 FEET TONIGHT.
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