Great Lakes Forecast
Issued by NWS

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000
FZUS61 KBUF 172046
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
346 PM EST Fri Nov 17 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...A 30.1 inch high will move east across New England
tonight, while a broad 29.4 inch low will become organized over
the central plains. The low will deepen to 29.1 inches on Saturday
while advancing across the Mid West to Lake Erie. The storm will
then track across the lake Saturday night while further deepening
to 28.9 inches. As the deep storm exits across the Saint lawrence
Valley on Sunday, expansive high pressure will build across the
Lower Mississippi Valley. The large high will cross the southern
states on Monday.

LOZ062-180430-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
346 PM EST Fri Nov 17 2017

...GALE WATCH IN EFFECT FROM SATURDAY EVENING THROUGH SUNDAY
AFTERNOON...

.TONIGHT...South winds 5 to 15 knots becoming southeast. Rain
late. Waves 1 to 3 feet.
.SATURDAY...Southeast winds 10 to 15 knots becoming south. Rain.
Waves 1 to 2 feet building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.SATURDAY NIGHT...South winds 10 to 15 knots becoming northwest
and increasing to 40 knot gales overnight. Rain. Waves 1 to
3 feet building to 7 to 10 feet. Waves occasionally around
13 feet.
.SUNDAY...Northwest gales to 40 knots diminishing to 35 knots. A
chance of snow and rain in the morning, then lake effect snow
likely in the afternoon. Waves 10 to 15 feet subsiding to 9 to
12 feet. Waves occasionally around 19 feet.
.SUNDAY NIGHT...Northwest winds to 30 knots becoming west. Lake
effect snow likely. Waves 9 to 12 feet subsiding to 4 to 7 feet.
Waves occasionally around 15 feet.
.MONDAY...West winds 15 to 25 knots becoming southwest. A chance
of rain and snow during the day. Waves 3 to 6 feet.
.TUESDAY...Southwest winds to 30 knots becoming west. A chance of
rain showers Tuesday night. Waves 5 to 8 feet. Waves occasionally
around 10 feet.
.WEDNESDAY...West winds 15 to 20 knots diminishing to 10 to
15 knots. Waves 3 to 6 feet subsiding to 1 to 3 feet.

$$

LOZ063>065-180430-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
346 PM EST Fri Nov 17 2017

...GALE WATCH IN EFFECT FROM SATURDAY EVENING THROUGH SUNDAY
AFTERNOON...

.TONIGHT...Southwest winds 5 to 15 knots becoming southeast 15 to
20 knots. A chance of rain late. Waves 1 to 3 feet building to
2 to 4 feet.
.SATURDAY...South winds 15 to 25 knots. Rain. Waves 2 to 4 feet
building to 3 to 5 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots becoming southwest
and increasing to 35 knot gales overnight. Rain. Waves 3 to
5 feet building to 5 to 8 feet. Waves occasionally around
10 feet.
.SUNDAY...West gales to 40 knots becoming northwest. Snow and
rain in the morning, then lake effect snow in the afternoon.
Waves 11 to 16 feet. Waves occasionally around 20 feet.
.SUNDAY NIGHT...Northwest gales to 35 knots diminishing to 15 to
25 knots. Lake effect snow. Waves 10 to 14 feet subsiding to 6 to
9 feet. Waves occasionally around 18 feet.
.MONDAY...Northwest winds 15 to 25 knots becoming southwest. Lake
effect snow with lake effect rain likely during the day, then a
chance of rain Monday night. Waves 4 to 7 feet subsiding to 3 to
6 feet. Waves occasionally around 9 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming west to
30 knots. A chance of rain showers Tuesday night. Waves 5 to
8 feet building to 5 to 9 feet. Waves occasionally around
11 feet.
.WEDNESDAY...West winds 15 to 20 knots becoming northwest 10 to
15 knots. A chance of snow showers. Waves 4 to 7 feet subsiding
to 2 to 4 feet. Waves occasionally around 9 feet.

$$

LOZ061-180430-
MAFOR 1722/
ONTARIO WEST 1/2 12400 12310 11316 11436 11426 11416. A chance of
rain overnight. Waves 1 to 3 feet tonight. Waves 1 to 3 feet
building to 3 to 5 feet, then subsiding to 1 to 3 feet Saturday.

ONTARIO EAST 1/2 11600 11400 11310 11320 11420 11336 11436 11426.
Waves 1 to 3 feet building to 2 to 4 feet tonight. Waves 2 to 4
feet building to 3 to 5 feet Saturday.

$$



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