Great Lakes Forecast
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000
FZUS61 KBUF 210540
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1240 AM EST Tue Nov 21 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 overnight. 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. Then a 28.9 inch low is forecast to pass just north of
Lake Superior Friday and into Quebec Saturday which will push
another cold front across the lake.

LOZ062-211000-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1240 AM EST Tue Nov 21 2017

.OVERNIGHT...Southwest winds to 30 knots. Waves 5 to
8 feet. Waves occasionally around 10 feet.
.TUESDAY...Southwest winds to 30 knots. Waves 5 to 9 feet. Waves
occasionally around 11 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots. Rain showers likely.
Waves 4 to 7 feet subsiding to 3 to 6 feet. Waves occasionally
around 9 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>065-211000-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1240 AM EST Tue Nov 21 2017

.OVERNIGHT...Southwest winds 15 to 25 knots. Waves 5 to
8 feet. Waves occasionally around 10 feet.
.TUESDAY...South winds to 30 knots becoming southwest 15 to
25 knots. Waves 6 to 9 feet subsiding to 4 to 7 feet. Waves
occasionally around 11 feet.
.TUESDAY NIGHT...Southwest winds 15 to 25 knots becoming west.
Rain showers likely. Waves 4 to 7 feet subsiding to 3 to 6 feet.
Waves occasionally around 9 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.

$$

LOZ061-211000-
MAFOR 2107 AMD/
ONTARIO WEST 1/2 14540 11540 11530 11636. Waves 5 to 8 feet, and
occasionally around 10 feet overnight. Waves 5 to 9 feet, and
occasionally around 11 feet Tuesday. Waves 4 to 7 feet, and
occasionally around 9 feet Tuesday evening.

ONTARIO EAST 1/2 11520 11430 11440 13530 11520. Waves 4 to 7
feet, and occasionally around 9 feet overnight. Waves 6 to 9 feet
subsiding to 4 to 7 feet, and occasionally around 11 feet Tuesday.
Waves 4 to 7 feet, and occasionally around 9 feet Tuesday
evening.

$$

JJR


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