Great Lakes Forecast
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000
FZUS61 KBUF 210537
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
130 AM EDT Mon Aug 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...A 30.1 inch high will move off the mid-Atlantic coast
overnight and remain there on Tuesday. A strong cold front,
averaging 29.6 inches, will then cross Lake Ontario Tuesday night.
On Wednesday a 30.1 inch high will ridge from the Upper Plains to
western Ontario province, and then expand into the Great Lakes
region on Thursday.

LOZ062-210900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
130 AM EDT Mon Aug 21 2017

.OVERNIGHT...Southwest winds 5 to 10 knots. Waves 1 to
2 feet.
.MONDAY...Southwest winds 10 knots or less becoming west. Waves
1 foot or less.
.MONDAY NIGHT...Southwest winds 5 to 15 knots becoming south.
Waves 1 foot or less.
.TUESDAY...Southwest winds 5 to 15 knots increasing to 15 to
20 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 foot or less building to 2 to 4 feet.
.TUESDAY NIGHT...Southwest winds 15 to 20 knots becoming west.
Showers and thunderstorms in the evening. Some thunderstorms may
produce gusty winds in the evening. Waves 2 to 4 feet.
.WEDNESDAY...West winds 15 to 20 knots becoming northwest 10 to
15 knots. A chance of showers during the day. Waves 2 to 4 feet.
.THURSDAY...North winds 5 to 10 knots. A chance of showers during
the day. Waves 1 to 2 feet.
.FRIDAY...North winds 5 to 10 knots. Waves 1 to 2 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-210900-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
130 AM EDT Mon Aug 21 2017

.OVERNIGHT...Southwest winds 5 to 10 knots. Waves 1 to
2 feet.
.MONDAY...Southwest winds 5 to 15 knots. Waves 2 feet or less.
.MONDAY NIGHT...South winds 10 knots or less. Waves 2 feet or
less.
.TUESDAY...South winds 10 to 15 knots becoming southwest 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
1 to 3 feet.
.TUESDAY NIGHT...Southwest winds 15 to 25 knots becoming west.
Showers and thunderstorms in the evening...then a chance of
showers overnight. Some thunderstorms may produce gusty winds in
the evening. Waves 2 to 4 feet building to 3 to 6 feet.
.WEDNESDAY...West winds 15 to 20 knots becoming northwest 10 to
15 knots. A chance of showers during the day. Waves 3 to 5 feet
subsiding to 2 to 4 feet.
.THURSDAY...Northwest winds 5 to 10 knots becoming north. A
chance of showers during the day. Waves 1 to 3 feet.
.FRIDAY...North winds 5 to 10 knots becoming northwest. Waves
1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-210900-
MAFOR 2106 AMD/
ONTARIO WEST 1/2 14500 11500 11600 11500. Waves 2 feet or less.

ONTARIO EAST 1/2 12500 11400 11510 11500 12400. Waves 2 feet or
less.

$$



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