Great Lakes Forecast
Issued by NWS

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000
FZUS61 KBUF 140247
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1047 PM EDT Fri Oct 13 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 30.5 inch high will be anchored over the Canadian
maritimes overnight. The high will drift further offshore on
Saturday while a storm system will become organized over the Upper
Mississippi Valley. The resulting surface low will deepen to 29.4
inches when it will pass over the Upper Great Lakes Saturday
night...then will intensify to 29.1 inches as it will make its way
to western Quebec on Sunday. A strong cold front extending south
from this system will plow across Lake Ontario on Sunday. A 30.4
inch high over the southern plains Sunday night will nose across
the Ohio Valley to the Lower Great Lakes on Monday and move toward
the mid Atlantic on Tuesday.

LOZ062-140915-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1047 PM EDT Fri Oct 13 2017

...GALE WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY
EVENING...

.OVERNIGHT...South winds 5 to 15 knots becoming southwest.
Waves 2 feet or less.
.SATURDAY...Southwest winds 10 knots or less becoming southeast.
Waves 2 feet or less.
.SATURDAY NIGHT...East winds 5 to 15 knots becoming southeast.
Showers likely in the evening, then a chance of showers
overnight. Waves 2 feet or less.
.SUNDAY...South winds 15 to 25 knots becoming southwest to
30 knots. Showers with a chance of thunderstorms in the
afternoon. Some thunderstorms may produce gusty winds in the
afternoon. Waves 1 to 3 feet building to 4 to 7 feet. Waves
occasionally around 9 feet.
.SUNDAY NIGHT...West gales to 35 knots becoming northwest and
diminishing to 15 to 20 knots overnight. A chance of showers.
Waves 7 to 11 feet subsiding to 4 to 7 feet. Waves occasionally
around 14 feet.
.MONDAY...Northwest winds 15 to 20 knots becoming west 5 to
15 knots. A chance of showers during the day. 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.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-140915-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1047 PM EDT Fri Oct 13 2017

...GALE WATCH IN EFFECT FROM SUNDAY EVENING THROUGH LATE SUNDAY
NIGHT...

.OVERNIGHT...South winds 15 to 20 knots. Waves 3 to 5 feet
subsiding to 2 to 4 feet.
.SATURDAY...Southwest winds 5 to 15 knots becoming east. Waves
1 to 3 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots becoming south 15 to
20 knots. A chance of showers. Waves 2 feet or less.
.SUNDAY...South winds 15 to 25 knots becoming southwest. Showers
with a chance of thunderstorms in the afternoon. Some
thunderstorms may produce gusty winds in the afternoon. Waves
2 to 4 feet building to 3 to 6 feet.
.SUNDAY NIGHT...West gales to 35 knots becoming northwest and
diminishing to 15 to 25 knots overnight. Showers with a chance of
thunderstorms in the evening, then a chance of showers overnight.
Some thunderstorms may produce gusty winds in the evening. Waves
7 to 10 feet building to 9 to 13 feet, then subsiding to 7 to
10 feet. Waves occasionally around 16 feet.
.MONDAY...Northwest winds 15 to 20 knots diminishing to 5 to
15 knots. A chance of showers during the day. Waves 4 to 7 feet
subsiding to 1 to 3 feet. Waves occasionally around 9 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.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-140915-
MAFOR 1403/
ONTARIO WEST 1/2 11410 11510 13500 11400 12200. A chance of
showers Saturday evening. Waves 2 feet or less.

ONTARIO EAST 1/2 12420 13510 11500 12200. A chance of showers
Saturday evening. Waves 3 to 5 feet subsiding to 2 to 4 feet
overnight. Waves 1 to 3 feet Saturday. Waves 1 foot or less
Saturday evening.

$$



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