Great Lakes Forecast
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358
FZUS61 KBUF 221750
GLFLO

GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
130 PM EDT Tue Aug 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 29.5 inch low over southwestern Quebec will move east
across Quebec tonight and Wednesday while deepening to 29.2 inches.
A strong cold front trailing this low will cross the Lake this
evening. The low will weaken and exit across Labrador on Thursday. A
30.2 inch high will then build from near Lake Superior Thursday to
the Central Great Lakes Friday and the eastern Great Lakes Saturday.

LOZ062-222100-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
130 PM EDT Tue Aug 22 2017

...TORNADO WATCH 461 IN EFFECT UNTIL 9 PM EDT THIS EVENING...

.THIS AFTERNOON...Southwest winds 10 to 15 knots increasing to
15 to 25 knots. Showers and thunderstorms early...
then showers and thunderstorms likely late. Some thunderstorms
may be severe with strong winds early. Waves 2 to
4 feet building to 3 to 5 feet.
.TONIGHT...West winds 20 to 25 knots. Showers likely early...then
a chance of showers late in the evening. Waves 4 to 7 feet. Waves
occasionally around 9 feet.
.WEDNESDAY...West winds 15 to 25 knots. A chance of showers in
the afternoon. Waves 3 to 6 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 20 knots diminishing to
10 to 15 knots. A chance of showers in the evening. Waves 3 to
5 feet subsiding to 2 to 4 feet.
.THURSDAY...Northwest winds 5 to 15 knots becoming north. A
chance of waterspouts during the day. A chance of showers during
the day. Waves 1 to 3 feet.
.FRIDAY...Northeast winds 5 to 15 knots becoming northwest. Waves
1 to 3 feet.
.SATURDAY...Northwest winds 5 to 10 knots becoming north. Waves
1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-222100-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
130 PM EDT Tue Aug 22 2017

...TORNADO WATCH 461 IN EFFECT UNTIL 9 PM EDT THIS EVENING...

.THIS AFTERNOON...Southwest winds 15 to 25 knots. Showers and
thunderstorms. Some thunderstorms may be severe with strong
winds. Waves 2 to 4 feet building to 3 to 5 feet.
.TONIGHT...Southwest winds to 30 knots becoming west 15 to
25 knots. A chance of showers in the evening. Waves 5 to 8 feet.
Waves occasionally around 10 feet.
.WEDNESDAY...West winds 20 to 25 knots. A chance of showers in
the afternoon. Waves 4 to 7 feet. Waves occasionally around
9 feet.
.WEDNESDAY NIGHT...West winds 15 to 20 knots becoming northwest
10 to 15 knots. A chance of showers in the evening. Waves 3 to
6 feet.
.THURSDAY...Northwest winds 10 to 15 knots becoming north. A
chance of waterspouts during the day. A chance of showers during
the day. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.FRIDAY...Northeast winds 5 to 15 knots becoming northwest. Waves
1 to 3 feet.
.SATURDAY...Northwest winds 10 knots or less. Waves 2 feet or
less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-222100-
MAFOR 2218 AMD/
ONTARIO WEST 1/2...TORNADO WATCH IN EFFECT...11520 11530 14630
11630. A chance of showers and thunderstorms this afternoon. A
chance of showers this evening. Waves 2 to 4 feet building to 3
to 5 feet this afternoon. Waves 4 to 7 feet...and occasionally
around 9 feet tonight. Waves 4 to 7 feet subsiding to 3 to 6
feet...and occasionally around 9 feet Wednesday morning.

ONTARIO EAST 1/2...TORNADO WATCH IN EFFECT...11529 12530 14630. A
chance of showers this evening. Waves 2 to 4 feet building to 3
to 5 feet this afternoon. Waves 5 to 8 feet...and occasionally
around 10 feet tonight and Wednesday morning.

$$



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