Great Lakes Forecast
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776
FZUS61 KBUF 221741
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
141 PM EDT Thu Jun 22 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 30.0 inch high ridged along the spine of the Appalachians will
slide off the East Coast this afternoon, while a warm front lifts
into the Lower Lakes region. A 29.6 inch low will then develop
over the central Great Lakes tonight and track north of the lake
on Friday, before merging with a larger low pressure system over
Quebec Friday night. An associated cold front will cross the lake
Friday night.

LOZ062-222100-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
141 PM EDT Thu Jun 22 2017

.THIS AFTERNOON...South winds 10 knots or less becoming southeast.
Scattered showers early...then a chance of showers and
thunderstorms late. Waves 1 foot or less.
.TONIGHT...Southeast winds 5 to 15 knots becoming southwest 15 to
20 knots. A chance of showers and thunderstorms early...then
showers likely with a chance of thunderstorms late in the
evening. A chance of showers and thunderstorms after midnight.
Waves 2 feet or less building to 2 to 3 feet.
.FRIDAY...Southwest winds 15 to 20 knots. A chance of showers and
thunderstorms in the morning...then showers and thunderstorms
likely in the afternoon. Some thunderstorms may produce gusty
winds in the afternoon. Waves 2 to 3 feet.
.FRIDAY NIGHT...Southwest winds 15 to 20 knots becoming west.
Showers and thunderstorms likely in the evening. Some
thunderstorms may produce gusty winds in the evening. Waves 1 to
3 feet building to 2 to 4 feet.
.SATURDAY...West winds 15 to 20 knots. A chance of showers. Waves
2 to 4 feet.
.SUNDAY...West winds 15 to 20 knots becoming southwest 5 to
15 knots. A chance of showers. Waves 3 to 5 feet subsiding to
1 to 3 feet.
.MONDAY...Southwest winds 15 to 20 knots becoming west. A chance
of showers and thunderstorms. Waves 1 to 3 feet building to 3 to
5 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-222100-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
141 PM EDT Thu Jun 22 2017

.THIS AFTERNOON...South winds 5 to 10 knots becoming southeast. A
chance of showers early...then a chance of showers and
thunderstorms late. Waves 1 foot or less.
.TONIGHT...Southeast winds 5 to 15 knots becoming southwest 15 to
20 knots. A chance of showers and thunderstorms early...then
showers likely with a chance of thunderstorms late in the
evening. A chance of showers and thunderstorms after midnight.
Waves 1 foot or less building to 1 to 3 feet.
.FRIDAY...Southwest winds 15 to 20 knots diminishing to 10 to
15 knots. A chance of showers and thunderstorms in the morning...
then showers and thunderstorms in the afternoon. Some
thunderstorms may produce gusty winds in the afternoon. Waves
1 to 3 feet.
.FRIDAY NIGHT...Southwest winds 10 to 15 knots becoming west and
increasing to 15 to 25 knots. Showers and thunderstorms likely in
the evening...then a chance of showers and thunderstorms
overnight. Some thunderstorms may produce gusty winds in the
evening. Waves 1 to 3 feet building to 3 to 5 feet.
.SATURDAY...West winds 15 to 20 knots. A chance of showers. Waves
3 to 6 feet subsiding to 1 to 3 feet.
.SUNDAY...West winds 15 to 25 knots diminishing to 10 to
15 knots. A chance of showers. Waves 4 to 7 feet subsiding to
1 to 3 feet. Waves occasionally around 9 feet.
.MONDAY...Southwest winds 10 to 15 knots becoming west and
increasing to 15 to 25 knots. A chance of showers and
thunderstorms. Waves 1 to 3 feet building to 3 to 6 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-222100-
MAFOR 2218 AMD/
ONTARIO WEST 1/2 12300 11410 13520 11510. Scattered showers with
a chance of thunderstorms this afternoon. A chance of showers and
thunderstorms tonight and Friday morning. Waves 1 foot or less
this afternoon. Waves 1 to 3 feet tonight and Friday morning.

ONTARIO EAST 1/2 13300 11410 13510. A chance of showers this
afternoon. A chance of showers and thunderstorms tonight and
Friday morning. Waves 2 feet or less this afternoon and tonight.
Waves 1 to 3 feet Friday morning.

$$

JJR



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