187
FZUS61 KBUF 122003
GLFLO
OPEN LAKE FORECAST FOR LAKE ONTARIO
NATIONAL WEATHER SERVICE BUFFALO NY
403 PM 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
A 30.1 INCH HIGH WILL BUILD INTO THE OHIO VALLEY AND
LOWER GREAT LAKES THIS 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 HIGH WILL THEN RIDGE ACROSS THE LAKE
SATURDAY NIGHT, BEFORE MOVING 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, BEFORE PUSHING NORTHEASTWARD ACROSS
QUEBEC THROUGH THE REMAINDER OF MONDAY AND TUESDAY. THIS LOW WILL
SWEEP A STRONG COLD FRONT ACROSS THE LAKE MONDAY AFTERNOON, WITH A
30.3 INCH HIGH THEN BUILDING ACROSS THE GREAT LAKES AND OHIO VALLEY
TUESDAY.
LOZ062-130300-
LAKE ONTARIO OPEN WATERS FROM THE NIAGARA RIVER TO HAMLIN BEACH-
403 PM EDT THU MAR 12 2026
...GALE WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY
MORNING...
TONIGHT
NORTHWEST WINDS 15 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS. WAVES 3 TO 6 FEET SUBSIDING TO 1 TO 2 FEET.
FRIDAY
SOUTHEAST WINDS 10 TO 15 KNOTS BECOMING SOUTHWEST AND
INCREASING TO 35 KNOT GALES IN THE AFTERNOON. SNOW IN THE
MORNING, THEN RAIN AND SNOW IN THE AFTERNOON. WAVES 1 TO 2 FEET
BUILDING TO 8 TO 11 FEET. WAVES OCCASIONALLY AROUND 14 FEET.
FRIDAY NIGHT
SOUTHWEST GALES TO 40 KNOTS BECOMING WEST TO
35 KNOTS. A CHANCE OF RAIN AND SNOW SHOWERS. WAVES 11 TO 16 FEET
SUBSIDING TO 10 TO 15 FEET. WAVES OCCASIONALLY AROUND 20 FEET.
SATURDAY
WEST GALES TO 35 KNOTS DIMINISHING TO 15 TO 25 KNOTS.
A CHANCE OF SNOW SHOWERS IN THE MORNING. WAVES 11 TO 15 FEET
SUBSIDING TO 4 TO 7 FEET. WAVES OCCASIONALLY AROUND 19 FEET.
SATURDAY NIGHT
WEST WINDS 15 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS. A CHANCE OF SNOW SHOWERS OVERNIGHT. WAVES 3 TO 5 FEET
SUBSIDING TO 1 TO 3 FEET.
SUNDAY
EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST TO
30 KNOTS. SNOW SHOWERS WITH A CHANCE OF RAIN SHOWERS DURING THE
DAY, THEN A CHANCE OF RAIN AND SNOW SHOWERS SUNDAY NIGHT. WAVES
3 TO 5 FEET BUILDING TO 5 TO 9 FEET. WAVES OCCASIONALLY AROUND
11 FEET.
MONDAY
SOUTH WINDS TO 30 KNOTS BECOMING WEST AND INCREASING TO
40 KNOT GALES. RAIN SHOWERS DURING THE DAY, THEN RAIN SHOWERS
WITH A CHANCE OF SNOW SHOWERS MONDAY NIGHT. WAVES 5 TO 8 FEET
BUILDING TO 12 TO 17 FEET. WAVES OCCASIONALLY AROUND 22 FEET.
TUESDAY
WEST GALES TO 35 KNOTS DIMINISHING TO 15 TO 25 KNOTS.
A CHANCE OF SNOW SHOWERS. WAVES 10 TO 15 FEET SUBSIDING TO 6 TO
9 FEET. WAVES OCCASIONALLY AROUND 19 FEET.
LOZ063>065-130300-
LAKE ONTARIO OPEN WATERS FROM HAMLIN BEACH TO THE SAINT LAWRENCE
RIVER-
403 PM EDT THU MAR 12 2026
...GALE WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY
AFTERNOON...
TONIGHT
NORTHWEST WINDS TO 30 KNOTS BECOMING WEST AND
DIMINISHING TO 5 TO 10 KNOTS. WAVES 6 TO 10 FEET SUBSIDING TO
2 TO 4 FEET. WAVES OCCASIONALLY AROUND 13 FEET.
FRIDAY
SOUTH WINDS 10 TO 15 KNOTS INCREASING TO 30 KNOTS IN
THE AFTERNOON. SNOW. RAIN AND SNOW LATE. WAVES 2 FEET OR LESS
BUILDING TO 5 TO 8 FEET. WAVES OCCASIONALLY AROUND 10 FEET.
FRIDAY NIGHT
SOUTHWEST GALES TO 35 KNOTS BECOMING WEST. RAIN
AND SNOW. WAVES 9 TO 13 FEET BUILDING TO 12 TO 16 FEET. WAVES
OCCASIONALLY AROUND 20 FEET.
SATURDAY
WEST GALES TO 40 KNOTS DIMINISHING TO 30 KNOTS. SNOW
LIKELY IN THE MORNING, THEN A CHANCE OF SNOW SHOWERS IN THE
AFTERNOON. WAVES 14 TO 18 FEET SUBSIDING TO 9 TO 12 FEET. WAVES
OCCASIONALLY AROUND 23 FEET.
SATURDAY NIGHT
WEST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST
AND DIMINISHING TO 5 TO 15 KNOTS. WAVES 7 TO 10 FEET SUBSIDING TO
2 FEET OR LESS. WAVES OCCASIONALLY AROUND 13 FEET.
SUNDAY
EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST AND
INCREASING TO 40 KNOT GALES. SNOW SHOWERS WITH A CHANCE OF RAIN
SHOWERS. WAVES 2 TO 4 FEET BUILDING TO 7 TO 11 FEET. WAVES
OCCASIONALLY AROUND 14 FEET.
MONDAY
SOUTHEAST GALES TO 40 KNOTS BECOMING WEST TO 35 KNOTS.
RAIN SHOWERS DURING THE DAY, THEN RAIN SHOWERS WITH A CHANCE OF
SNOW SHOWERS MONDAY NIGHT. WAVES 7 TO 11 FEET BUILDING TO 12 TO
17 FEET. WAVES OCCASIONALLY AROUND 22 FEET.
TUESDAY
WEST GALES TO 35 KNOTS DIMINISHING TO 30 KNOTS. WAVES
11 TO 16 FEET SUBSIDING TO 9 TO 12 FEET. WAVES OCCASIONALLY
AROUND 20 FEET.
LOZ061-130300-
MAFOR 1221/
ONTARIO WEST 1/2...GALE WARNING IN EFFECT...11730 11720 11710
11600 11410 11337 11447 11457. WAVES 4 TO 7 FEET SUBSIDING TO 1
TO 3 FEET, AND OCCASIONALLY AROUND 9 FEET TONIGHT. WAVES 1 TO 2
FEET BUILDING TO 7 TO 10 FEET, AND OCCASIONALLY AROUND 13 FEET
FRIDAY.
ONTARIO EAST 1/2 11740 11730 11720 11710 11510 11320 11337 11447.
WAVES 6 TO 10 FEET SUBSIDING TO 2 TO 4 FEET, AND OCCASIONALLY
AROUND 13 FEET TONIGHT. WAVES 2 FEET OR LESS BUILDING TO 3 TO 6
FEET FRIDAY.
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