966
FZUS61 KBUF 202002
GLFLO
OPEN LAKE FORECAST FOR LAKE ONTARIO
NATIONAL WEATHER SERVICE BUFFALO NY
402 PM EDT WED AUG 20 2025
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 LOW OVER THE WESTERN SOUTHERN TIER WILL
CONTINUE TO DRIFT EASTWARD THIS EVENING, WHILE HURRICANE ERIN CURVES
NORTH/NORTHEASTWARD, WITH CENTER OF THE STORM REMAINING WELL OFF THE
CAROLINA COASTLINE. A 30.1 INCH HIGH WILL THEN BUILD ACROSS THE
GREAT LAKES REGION THURSDAY THROUGH FRIDAY NIGHT. A 29.5 INCH LOW
WILL MOVE NEAR THE WESTERN SHORE OF JAMES BAY SATURDAY, AND LINGER
JUST TO THE EAST OF JAMES BAY SUNDAY WHILE PUSHING A COLD FRONT
ACROSS THE LAKE SUNDAY NIGHT. A SECONDARY FRONTAL BOUNDARY WILL
CROSS THE LAKES MONDAY.
LOZ062-210300-
LAKE ONTARIO OPEN WATERS FROM THE NIAGARA RIVER TO HAMLIN BEACH-
402 PM EDT WED AUG 20 2025
TONIGHT
EAST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST. WAVES
4 TO 7 FEET. WAVES OCCASIONALLY AROUND 9 FEET.
THURSDAY
NORTHEAST WINDS 15 TO 20 KNOTS BECOMING EAST 10 TO
15 KNOTS. WAVES 3 TO 6 FEET SUBSIDING TO 2 TO 4 FEET.
THURSDAY NIGHT
EAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST.
WAVES 1 TO 3 FEET.
FRIDAY
NORTHEAST WINDS 10 KNOTS OR LESS BECOMING EAST. WAVES
1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHEAST WINDS 10 KNOTS OR LESS BECOMING SOUTH.
WAVES 1 FOOT OR LESS.
SATURDAY
SOUTHWEST WINDS 5 TO 15 KNOTS. SHOWERS LIKELY WITH A
CHANCE OF THUNDERSTORMS SATURDAY NIGHT. WAVES 2 FEET OR LESS.
SUNDAY
SOUTHWEST WINDS 10 TO 15 KNOTS BECOMING WEST. SHOWERS
LIKELY WITH A CHANCE OF THUNDERSTORMS DURING THE DAY, THEN A
CHANCE OF SHOWERS SUNDAY NIGHT. WAVES 1 TO 2 FEET.
MONDAY
WEST WINDS 10 TO 15 KNOTS. A CHANCE OF SHOWERS. WAVES
1 TO 3 FEET BUILDING TO 2 TO 4 FEET.
WINDS AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.
LOZ063-210300-
LAKE ONTARIO OPEN WATERS FROM HAMLIN BEACH TO SODUS BAY-
402 PM EDT WED AUG 20 2025
TONIGHT
EAST WINDS 15 TO 20 KNOTS. PATCHY DRIZZLE EARLY.
PATCHY FOG AFTER MIDNIGHT. WAVES 3 TO 6 FEET.
THURSDAY
EAST WINDS 15 TO 20 KNOTS DIMINISHING TO 10 TO
15 KNOTS. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET.
THURSDAY NIGHT
EAST WINDS 5 TO 10 KNOTS BECOMING NORTHEAST.
WAVES 1 TO 2 FEET.
FRIDAY
NORTHEAST WINDS 10 KNOTS OR LESS BECOMING WEST. WAVES
1 FOOT OR LESS.
FRIDAY NIGHT
SOUTHWEST WINDS 10 KNOTS OR LESS BECOMING SOUTH.
WAVES 1 FOOT OR LESS.
SATURDAY
SOUTH WINDS 5 TO 15 KNOTS. SHOWERS LIKELY WITH A
CHANCE OF THUNDERSTORMS SATURDAY NIGHT. WAVES 1 FOOT OR LESS
BUILDING TO 1 TO 3 FEET.
SUNDAY
SOUTHWEST WINDS 10 TO 15 KNOTS. SHOWERS LIKELY WITH A
CHANCE OF THUNDERSTORMS. WAVES 1 TO 3 FEET.
MONDAY
SOUTHWEST WINDS 10 TO 15 KNOTS BECOMING WEST. A CHANCE
OF SHOWERS. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET.
WINDS AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.
LOZ064-065-210300-
LAKE ONTARIO OPEN WATERS FROM SODUS BAY TO THE SAINT LAWRENCE
RIVER-
402 PM EDT WED AUG 20 2025
TONIGHT
EAST WINDS 15 TO 20 KNOTS DIMINISHING TO 10 TO
15 KNOTS. PATCHY DRIZZLE EARLY. PATCHY FOG AFTER MIDNIGHT. WAVES
2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET.
THURSDAY
EAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST. WAVES
2 FEET OR LESS.
THURSDAY NIGHT
NORTHEAST WINDS 5 TO 10 KNOTS. WAVES 1 FOOT OR
LESS.
FRIDAY
NORTHEAST WINDS 10 KNOTS OR LESS BECOMING WEST. WAVES
1 FOOT OR LESS.
FRIDAY NIGHT
WEST WINDS 10 KNOTS OR LESS BECOMING SOUTH. WAVES
1 FOOT OR LESS.
SATURDAY
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 15 TO
20 KNOTS. SHOWERS WITH A CHANCE OF THUNDERSTORMS SATURDAY NIGHT.
WAVES 2 FEET OR LESS BUILDING TO 2 TO 4 FEET.
SUNDAY
SOUTH WINDS 15 TO 20 KNOTS BECOMING SOUTHWEST 10 TO
15 KNOTS. SHOWERS WITH A CHANCE OF THUNDERSTORMS. WAVES 2 TO
4 FEET SUBSIDING TO 1 TO 3 FEET.
MONDAY
SOUTHWEST WINDS 10 TO 15 KNOTS BECOMING WEST. A CHANCE
OF SHOWERS. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET.
WINDS AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.
LOZ061-210300-
MAFOR 2021/
ONTARIO WEST 1/2 11220 11130 14120 11120 11210. WAVES 4 TO 7
FEET, AND OCCASIONALLY AROUND 9 FEET TONIGHT. WAVES 3 TO 6 FEET
SUBSIDING TO 2 TO 4 FEET THURSDAY.
ONTARIO EAST 1/2 13220 14210 11110. WAVES 2 TO 4 FEET BUILDING TO
3 TO 5 FEET, THEN SUBSIDING TO 2 TO 4 FEET TONIGHT. WAVES 2 TO 4
FEET SUBSIDING TO 1 TO 3 FEET THURSDAY.
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