Great Lakes Forecast
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000
FZUS61 KBUF 202048
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
348 PM EST Mon Nov 20 2017

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...Expansive high pressure over the southern states will
slide off the Atlantic coastline tonight. A 29.1 inch low just
south of James Bay on Tuesday will push a cold front across the
lake Tuesday night...then high pressure over the Plains States
will build across the Ohio Valley and Lower Great Lakes Wednesday
and Thursday.

LOZ062-210430-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
348 PM EST Mon Nov 20 2017

.TONIGHT...Southwest winds 15 to 25 knots. Waves 3 to 6 feet.
.TUESDAY...Southwest winds 20 to 25 knots. Waves 4 to 7 feet.
Waves occasionally around 9 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots. Rain showers likely.
Waves 3 to 6 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots. Waves 3 to 6 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 20 knots becoming
southwest and diminishing to 10 knots or less overnight. Waves
2 to 4 feet subsiding to 1 to 3 feet.
.THURSDAY...Southwest winds 10 to 15 knots becoming west 15 to
20 knots. A chance of rain and snow showers Thursday night. Waves
1 to 2 feet building to 3 to 5 feet.
.FRIDAY...West winds 5 to 10 knots becoming southwest and
increasing to 15 to 25 knots. A chance of rain showers Friday
night. Waves 1 to 3 feet building to 3 to 6 feet.
.SATURDAY...Southwest winds 15 to 25 knots becoming northwest.
Rain showers likely during the day, then rain and snow showers
likely Saturday night. Waves 3 to 6 feet.

$$

LOZ063>065-210430-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
348 PM EST Mon Nov 20 2017

.TONIGHT...Southwest winds 15 to 20 knots becoming south. Lake
effect rain and snow showers likely early, then a chance of rain
and snow showers late this evening. Waves 4 to 7 feet subsiding
to 3 to 5 feet. Waves occasionally around 9 feet.
.TUESDAY...South winds 15 to 25 knots becoming southwest. Waves
3 to 5 feet building to 4 to 7 feet. Waves occasionally around
9 feet.
.TUESDAY NIGHT...Southwest winds 15 to 25 knots becoming west.
Rain showers likely. Waves 3 to 6 feet.
.WEDNESDAY...West winds 15 to 25 knots becoming northwest. A
chance of snow and rain showers in the morning, then a chance of
snow showers in the afternoon. Waves 4 to 7 feet. Waves
occasionally around 9 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 20 knots becoming south
and diminishing to less than 10 knots overnight. Waves 3 to
6 feet subsiding to 2 feet or less.
.THURSDAY...Southwest winds 10 to 15 knots becoming northwest
15 to 20 knots. A chance of rain showers during the day, then
rain and snow showers likely Thursday night. Waves 2 feet or less
building to 3 to 6 feet.
.FRIDAY...West winds 5 to 15 knots becoming southwest 15 to
20 knots. A chance of rain and snow showers during the day, then
a chance of rain showers Friday night. Waves 2 to 4 feet building
to 3 to 6 feet.
.SATURDAY...Southwest winds 15 to 25 knots becoming northwest.
Rain showers likely during the day, then rain and snow showers
likely Saturday night. Waves 3 to 6 feet.

$$

LOZ061-210430-
MAFOR 2022/
ONTARIO WEST 1/2 12520 15530. Waves 3 to 6 feet tonight. Waves 3
to 6 feet building to 4 to 7 feet, and occasionally around 9 feet
Tuesday.

ONTARIO EAST 1/2 11537 11520 13420 12430 11530. A chance of rain
and snow showers this evening. Waves 4 to 7 feet subsiding to 3
to 5 feet, and occasionally around 9 feet tonight. Waves 3 to 5
feet building to 3 to 6 feet, and occasionally around 9 feet
Tuesday.

$$



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