836
FZUS61 KBUF 070805
GLFLO
OPEN LAKE FORECAST FOR LAKE ONTARIO
NATIONAL WEATHER SERVICE BUFFALO NY
405 AM EDT TUE APR 7 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 29.9 INCH CLIPPER LOW WILL CROSS LAKE ONTARIO EARLY
THIS MORNING, THEN SLIDE OFF THE NEW ENGLAND COAST TODAY. A 30.6
INCH HIGH WILL THEN BUILD FROM THE CENTRAL GREAT LAKES TO THE NEW
ENGLAND COASTLINE THROUGH WEDNESDAY, BEFORE MOVING SOUTHEAST OF
NOVA SCOTIA THURSDAY. A COLD FRONT WILL CROSS THE LAKE FRIDAY, WITH
A 30.5 INCH HIGH THEN FORECAST TO BUILD EAST ACROSS THE GREAT LAKES
SATURDAY.
LOZ062-071500-
LAKE ONTARIO OPEN WATERS FROM THE NIAGARA RIVER TO HAMLIN BEACH-
405 AM EDT TUE APR 7 2026
TODAY
NORTHWEST WINDS TO 30 KNOTS DIMINISHING TO 15 TO
20 KNOTS. SNOW SHOWERS LIKELY EARLY, THEN A CHANCE OF SNOW
SHOWERS LATE THIS MORNING. WAVES 5 TO 9 FEET SUBSIDING TO 3 TO
5 FEET. WAVES OCCASIONALLY AROUND 11 FEET.
TONIGHT
NORTHWEST WINDS 15 TO 20 KNOTS BECOMING SOUTHWEST AND
DIMINISHING TO LESS THAN 10 KNOTS AFTER MIDNIGHT. WAVES 1 TO
3 FEET SUBSIDING TO 1 FOOT OR LESS.
WEDNESDAY
SOUTH WINDS 10 KNOTS OR LESS BECOMING EAST 10 TO
15 KNOTS. WAVES 2 FEET OR LESS.
WEDNESDAY NIGHT
EAST WINDS 10 TO 15 KNOTS BECOMING SOUTH 15 TO
20 KNOTS. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET.
THURSDAY
SOUTH WINDS 15 TO 20 KNOTS BECOMING SOUTHWEST 10 TO
15 KNOTS. A CHANCE OF SHOWERS. WAVES 3 TO 5 FEET SUBSIDING TO
1 TO 3 FEET.
FRIDAY
WEST WINDS 5 TO 10 KNOTS BECOMING NORTHWEST. RAIN
SHOWERS LIKELY DURING THE DAY, THEN A CHANCE OF RAIN SHOWERS
FRIDAY NIGHT. WAVES 2 FEET OR LESS.
SATURDAY
NORTHWEST WINDS 10 KNOTS OR LESS BECOMING SOUTHEAST.
WAVES 1 FOOT OR LESS.
LOZ063>065-071500-
LAKE ONTARIO OPEN WATERS FROM HAMLIN BEACH TO THE SAINT LAWRENCE
RIVER-
405 AM EDT TUE APR 7 2026
TODAY
WEST WINDS TO 30 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS. SNOW SHOWERS EARLY, THEN A CHANCE OF SNOW SHOWERS.
WAVES 7 TO 11 FEET SUBSIDING TO 3 TO 6 FEET. WAVES OCCASIONALLY
AROUND 14 FEET.
TONIGHT
NORTHWEST WINDS 15 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET.
WEDNESDAY
SOUTHWEST WINDS 10 KNOTS OR LESS BECOMING EAST.
WAVES 1 FOOT OR LESS.
WEDNESDAY NIGHT
SOUTHEAST WINDS 10 TO 15 KNOTS BECOMING SOUTH
AND INCREASING TO 15 TO 25 KNOTS. WAVES 1 TO 3 FEET BUILDING TO
3 TO 6 FEET.
THURSDAY
SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST. A
CHANCE OF RAIN SHOWERS. WAVES 3 TO 6 FEET SUBSIDING TO 2 TO
4 FEET.
FRIDAY
SOUTH WINDS 5 TO 15 KNOTS BECOMING NORTHWEST. A CHANCE
OF RAIN SHOWERS. WAVES 2 FEET OR LESS.
SATURDAY
NORTHWEST WINDS 5 TO 15 KNOTS BECOMING SOUTH LESS
THAN 10 KNOTS. WAVES 2 FEET OR LESS.
LOZ061-071500-
MAFOR 0709/
ONTARIO WEST 1/2 11647 11740 11730 12720 11710 12700. WAVES 3 TO
6 FEET BUILDING TO 5 TO 9 FEET, THEN SUBSIDING TO 3 TO 5 FEET,
AND OCCASIONALLY AROUND 11 FEET TODAY. WAVES 2 TO 4 FEET
SUBSIDING TO 1 TO 3 FEET TONIGHT.
ONTARIO EAST 1/2 11647 11740 11840 12720 12710 11700. WAVES 1 TO
3 FEET BUILDING TO 7 TO 11 FEET, THEN SUBSIDING TO 3 TO 6 FEET,
AND OCCASIONALLY AROUND 14 FEET TODAY. WAVES 2 TO 4 FEET
SUBSIDING TO 1 TO 3 FEET TONIGHT.
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