Great Lakes Forecast
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697
FZUS61 KBUF 151734
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
134 PM EDT Sun Oct 15 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 Lake Huron will move to southern
Quebec late this afternoon while deepening to 29.3 inches. A
strong cold front trailing this low will cross the lake early this
evening. This low will then continue into the Canadian Maritimes
by Monday morning. A 30.4 inch high over the southern Plains
Monday will build into the Ohio Valley and Mid Atlantic Tuesday
and Wednesday.

LOZ062-152115-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
134 PM EDT Sun Oct 15 2017

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.THIS AFTERNOON...Southwest winds 15 to 20 knots increasing to
35 knot gales. Showers with a chance of thunderstorms late. Some
thunderstorms may produce gusty winds late. Waves 3 to 5 feet
building to 5 to 8 feet. Waves occasionally around 10 feet.
.TONIGHT...West gales to 35 knots becoming northwest and
diminishing to 15 to 20 knots after midnight. Showers with a
chance of thunderstorms early. A chance of showers after
midnight. Some thunderstorms may produce gusty winds early. Waves
9 to 12 feet subsiding to 5 to 8 feet. Waves occasionally around
15 feet.
.MONDAY...Northwest winds 15 to 20 knots. A chance of showers in
the morning. Waves 3 to 6 feet subsiding to 2 to 4 feet.
.MONDAY NIGHT...Northwest winds 15 to 20 knots becoming southwest
and diminishing to 5 to 10 knots. Waves 2 to 4 feet subsiding to
1 to 3 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming west. Waves
2 to 4 feet building to 4 to 7 feet, then subsiding to 3 to 5
feet. Waves occasionally around 9 feet.
.WEDNESDAY...Southwest winds 10 to 15 knots increasing to 15 to
20 knots. Waves 2 to 4 feet.
.THURSDAY...Southwest winds 15 to 20 knots becoming west 5 to
15 knots. Waves 2 to 4 feet subsiding to 1 to 2 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-152115-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
134 PM EDT Sun Oct 15 2017

...GALE WARNING IN EFFECT FROM 6 PM EDT THIS EVENING THROUGH LATE
TONIGHT...

.THIS AFTERNOON...South winds 15 to 20 knots becoming southwest
and increasing to 30 knots. Showers with a chance of
thunderstorms late. Some thunderstorms may produce gusty winds
late. Waves 3 to 6 feet.
.TONIGHT...West gales to 35 knots becoming northwest and
diminishing to 15 to 25 knots after midnight. Showers with a
chance of thunderstorms early, then a chance of showers from late
evening on. Some thunderstorms may produce gusty winds early.
Waves 9 to 13 feet subsiding to 7 to 10 feet. Waves occasionally
around 16 feet.
.MONDAY...Northwest winds 15 to 20 knots. A chance of showers.
Waves 4 to 7 feet subsiding to 3 to 6 feet. Waves occasionally
around 9 feet.
.MONDAY NIGHT...Northwest winds 15 to 20 knots becoming west 5 to
15 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming west. Waves
2 to 4 feet building to 4 to 7 feet, then subsiding to 3 to 6
feet. Waves occasionally around 9 feet.
.WEDNESDAY...Southwest winds 10 to 15 knots increasing to 15 to
20 knots. Waves 2 to 4 feet.
.THURSDAY...Southwest winds 15 to 20 knots becoming west 5 to
15 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-152115-
MAFOR 1515/
ONTARIO WEST 1/2...GALE WARNING IN EFFECT...11530 11546 11656
11650 11740 11730 12720. A chance of thunderstorms this
afternoon. A chance of thunderstorms this evening, then a chance
of showers overnight. A chance of showers Monday morning. Waves 2
to 4 feet building to 5 to 8 feet, and occasionally around 10
feet this afternoon. Waves 9 to 13 feet subsiding to 6 to 9 feet,
and occasionally around 16 feet tonight. Waves 4 to 7 feet
subsiding to 3 to 5 feet, and occasionally around 9 feet Monday
morning.

ONTARIO EAST 1/2...GALE WARNING IN EFFECT...11430 11536 11556
11656 11740 11730 11728 11720. A chance of thunderstorms this
afternoon. A chance of thunderstorms this evening, then a chance
of showers overnight. A chance of showers Monday morning. Waves 3
to 6 feet this afternoon. Waves 8 to 11 feet building to 10 to 13
feet, then subsiding to 7 to 10 feet, and occasionally around 16
feet tonight. Waves 4 to 7 feet subsiding to 3 to 6 feet, and
occasionally around 9 feet Monday morning.

$$



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