Great Lakes Forecast
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825
FZUS61 KBUF 220235
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1035 PM 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
through 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.

LOZ062-220915-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1035 PM EDT Mon Aug 21 2017

.OVERNIGHT...Southeast winds 5 to 10 knots becoming south. A
chance of showers and thunderstorms late. Waves 1 foot or less.
.TUESDAY...Southwest winds 15 to 25 knots. A chance of showers
and thunderstorms in the morning...then showers and thunderstorms
likely in the afternoon. Some thunderstorms may be severe with
strong winds in the afternoon. Waves 1 to 3 feet building to 3 to
5 feet.
.TUESDAY NIGHT...West winds to 30 knots. A chance of showers in
the evening. Waves 3 to 6 feet.
.WEDNESDAY...West winds 15 to 25 knots. A chance of waterspouts
in the afternoon. A chance of showers in the afternoon. Waves
3 to 6 feet subsiding to 2 to 4 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 20 knots becoming north
10 to 15 knots. A chance of waterspouts in the evening. A chance
of showers. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.THURSDAY...North winds 5 to 10 knots. A chance of showers during
the day. Waves 1 to 3 feet.
.FRIDAY...North winds 5 to 10 knots. Waves 1 to 2 feet.
.SATURDAY...North winds 10 knots or less becoming northeast.
Waves 1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-220915-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1035 PM EDT Mon Aug 21 2017

.OVERNIGHT...South winds 5 to 15 knots. Waves 2 feet or less.
.TUESDAY...South winds 15 to 25 knots becoming southwest. A
chance of showers and thunderstorms late in the morning. Showers
and thunderstorms likely in the afternoon. Some thunderstorms may
be severe with strong winds in the afternoon. Waves 1 to 3 feet
building to 3 to 5 feet.
.TUESDAY NIGHT...Southwest winds 15 to 25 knots becoming west to
30 knots. Showers and thunderstorms in the evening...then a
chance of showers overnight. Some thunderstorms may be severe
with strong winds. Waves 3 to 6 feet building to 4 to 7 feet.
Waves occasionally around 9 feet.
.WEDNESDAY...West winds 15 to 25 knots. A chance of waterspouts
in the afternoon. A chance of showers in the afternoon. Waves
5 to 8 feet subsiding to 3 to 6 feet. Waves occasionally around
10 feet.
.WEDNESDAY NIGHT...West winds 15 to 20 knots becoming north 10 to
15 knots. A chance of waterspouts in the evening. A chance of
showers. Waves 3 to 5 feet subsiding to 2 to 4 feet.
.THURSDAY...North winds 5 to 10 knots. A chance of showers during
the day. Waves 1 to 3 feet.
.FRIDAY...North winds 5 to 10 knots becoming northwest. Waves
2 feet or less.
.SATURDAY...North winds 10 knots or less becoming east. Waves
1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-220915-
MAFOR 2203/
ONTARIO WEST 1/2 12400 11410 12520 11539 11530 11630. A chance of
showers and thunderstorms Tuesday morning. A chance of showers
Tuesday evening. Waves 1 foot or less overnight. Waves 1 to 3
feet building to 3 to 5 feet Tuesday. Waves 3 to 6 feet Tuesday
evening.

ONTARIO EAST 1/2 11400 12410 11420 11520 11529 11539 11630. A
chance of showers and thunderstorms Tuesday morning. Waves 2 feet
or less overnight. Waves 1 to 3 feet building to 2 to 4 feet
Tuesday. Waves 3 to 6 feet Tuesday evening.

$$



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