Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FZUS61 KBUF 212030
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
330 PM EST Tue Nov 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 29.1 inch low just south of James Bay will push a
cold front across the lake tonight...then high pressure over the
Plains States will build across the Ohio Valley and Lower Great
Lakes Wednesday and Thursday. A 28.9 inch low is forecast to pass
just north of Lake Superior Friday and into Quebec Saturday which
will push another cold front across the lake.

LOZ062-220415-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
330 PM EST Tue Nov 21 2017

.TONIGHT...West winds 15 to 25 knots. Rain developing this
evening. Rain showers likely after midnight. Waves 4 to 7 feet
subsiding to 3 to 6 feet. Waves occasionally around 9 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots becoming west. Waves
3 to 6 feet subsiding to 2 to 4 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 20 knots becoming west.
Waves 2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots. A chance of rain showers
in the afternoon. Waves 2 to 4 feet building to 3 to 6 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots. Waves 5 to 8 feet
subsiding to 3 to 5 feet. Waves occasionally around 10 feet.
.FRIDAY...West winds 10 to 15 knots becoming southwest and
increasing to 30 knots. A chance of rain showers Friday night.
Waves 2 to 4 feet building to 4 to 7 feet. Waves occasionally
around 9 feet.
.SATURDAY...Southwest winds 15 to 25 knots becoming northwest.
Rain showers likely during the day, then snow and rain showers
likely Saturday night. Waves 4 to 7 feet subsiding to 3 to
5 feet. Waves occasionally around 9 feet.
.SUNDAY...Northwest winds 15 to 20 knots becoming west 10 to
15 knots. Snow showers likely with a chance of rain showers
during the day, then a chance of snow showers Sunday night. Waves
2 to 4 feet.

$$

LOZ063>065-220415-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
330 PM EST Tue Nov 21 2017

.TONIGHT...Southwest winds 15 to 25 knots becoming west. Rain
developing late this evening. Rain showers likely late. Waves 4
to 7 feet subsiding to 3 to 5 feet. Waves occasionally around 9
feet.
.WEDNESDAY...West winds 15 to 25 knots becoming northwest. A
chance of rain showers early. Waves 4 to 7 feet subsiding to 3 to
6 feet. Waves occasionally around 9 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 20 knots becoming west.
A chance of snow showers overnight. Waves 3 to 5 feet subsiding
to 1 to 3 feet.
.THURSDAY...West winds 10 to 15 knots becoming southwest and
increasing to 15 to 25 knots. A chance of snow showers in the
morning, then rain showers likely in the afternoon. Waves 2 to
4 feet building to 4 to 7 feet. Waves occasionally around 9 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots. A chance of rain
showers. Waves 5 to 8 feet. Waves occasionally around 10 feet.
.FRIDAY...West winds 10 to 15 knots becoming south and increasing
to 30 knots. A chance of rain showers Friday night. Waves 3 to
5 feet building to 5 to 8 feet. Waves occasionally around
10 feet.
.SATURDAY...Southwest winds 15 to 25 knots becoming northwest.
Rain showers likely during the day, then snow and rain showers
likely Saturday night. Waves 5 to 8 feet subsiding to 3 to
6 feet. Waves occasionally around 10 feet.
.SUNDAY...Northwest winds 15 to 20 knots. Snow showers likely
with a chance of rain showers during the day, then a chance of
snow showers Sunday night. Waves 3 to 5 feet subsiding to 2 to
4 feet.

$$

LOZ061-220415-
MAFOR 2122/
ONTARIO WEST 1/2 11530 12626 11620 11630 11730 12620. A chance of
showers overnight. Waves 4 to 7 feet subsiding to 3 to 6 feet,
and occasionally around 9 feet tonight. Waves 3 to 6 feet
subsiding to 2 to 4 feet Wednesday.

ONTARIO EAST 1/2 12530 11626 11620 11630 11730 12720. Waves 4 to
7 feet subsiding to 3 to 5 feet, and occasionally around 9 feet
tonight. Waves 4 to 7 feet subsiding to 3 to 6 feet, and
occasionally around 9 feet Wednesday.

$$



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.