Great Lakes Forecast
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000
FZUS61 KBUF 190907
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
407 AM EST Sun Nov 19 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 29.0 inch low near Watertown deepening low will
deepen to 28.8 inches as it slides down the Saint Lawrence Valley
today. In its wake...expansive high pressure over the southern
plains today will build across the Lower Mississippi Valley
tonight...then will cross the southern states on Monday. A 29.1
inch low just south of James Bay on Tuesday will push a cold
front across the lake Tuesday night. High pressure over the plains
on Wednesday will then build across the Ohio Valley and Lower
Great Lakes Wednesday night and Thursday.

LOZ062-191600-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
407 AM EST Sun Nov 19 2017

...GALE WARNING IN EFFECT THROUGH THIS EVENING...

.TODAY...Northwest gales to 35 knots. A chance of rain showers
through early afternoon, then a chance of rain and snow showers
late. Waves 9 to 12 feet. Waves occasionally around 15 feet.
.TONIGHT...Northwest winds to 30 knots becoming west. Scattered
snow showers early, then lake effect snow showers likely from
late evening on. Waves 9 to 12 feet subsiding to 6 to 10 feet.
Waves occasionally around 15 feet.
.MONDAY...West winds to 30 knots. Scattered rain and snow showers
in the morning. Waves 5 to 9 feet subsiding to 4 to 7 feet. Waves
occasionally around 11 feet.
.MONDAY NIGHT...Southwest winds to 30 knots. Waves 5 to 8 feet.
Waves occasionally around 10 feet.
.TUESDAY...Southwest winds to 30 knots becoming west. Rain
showers likely Tuesday night. Waves 5 to 8 feet. Waves
occasionally around 10 feet.
.WEDNESDAY...West winds 15 to 25 knots diminishing to 5 to
15 knots. Waves 3 to 6 feet subsiding to 1 to 3 feet.
.THURSDAY...Southwest winds 10 to 15 knots becoming west 15 to
20 knots. Waves 1 to 3 feet building to 3 to 5 feet.

$$

LOZ063>065-191600-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
407 AM EST Sun Nov 19 2017

...GALE WARNING IN EFFECT THROUGH THIS EVENING...

.TODAY...Northwest gales to 35 knots. Rain showers this morning,
then a chance of rain showers early this afternoon. Rain showers
likely with a chance of snow showers late. Waves 10 to 15 feet.
Waves occasionally around 19 feet.
.TONIGHT...Northwest gales to 35 knots diminishing to 30 knots.
Lake effect snow showers likely early, then lake effect snow from
late evening on. Waves 10 to 14 feet subsiding to 8 to 11 feet.
Waves occasionally around 18 feet.
.MONDAY...Northwest winds to 30 knots becoming west. Lake effect
snow with lake effect rain showers likely in the morning, then
lake effect rain in the afternoon. Waves 6 to 10 feet. Waves
occasionally around 13 feet.
.MONDAY NIGHT...Southwest winds 15 to 25 knots increasing to
30 knots. Rain showers likely in the evening. Waves 5 to 8 feet.
Waves occasionally around 10 feet.
.TUESDAY...Southwest winds to 30 knots becoming west 15 to
25 knots. Rain showers likely Tuesday night. Waves 5 to 8 feet.
Waves occasionally around 10 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots becoming west and
diminishing to 5 to 10 knots. A chance of snow showers during the
day. Waves 4 to 7 feet subsiding to 1 to 2 feet. Waves
occasionally around 9 feet.
.THURSDAY...Southwest winds 10 to 15 knots becoming west 15 to
20 knots. A chance of snow and rain showers Thursday night. Waves
1 to 3 feet building to 3 to 5 feet.

$$

LOZ061-191600-
MAFOR 1910/
ONTARIO WEST 1/2...GALE WARNING IN EFFECT...11756 14750 11740
12647. A chance of rain showers this morning. A chance of rain
and snow showers this afternoon. A chance of lake effect snow
showers this evening. Waves 6 to 9 feet building to 10 to 13
feet, and occasionally around 16 feet today. Waves 9 to 13 feet
subsiding to 5 to 8 feet, and occasionally around 16 feet
tonight.

ONTARIO EAST 1/2...GALE WARNING IN EFFECT...12756 12750 11757
13747. A chance of showers this afternoon. Waves 4 to 7 feet
building to 10 to 15 feet, and occasionally around 19 feet today.
Waves 10 to 14 feet subsiding to 8 to 11 feet, and occasionally
around 18 feet tonight.

$$

JJR/RSH


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