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
931
FZUS61 KBUF 230835
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
435 AM EDT Sun Jul 23 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 29.8 inch low over Lake Erie will track eastward
into western New York today...then across New York State tonight
through Monday night. Meanwhile...a 30.2 inch high will ridge
from Hudson Bay to the Upper Great Lakes through Monday...before
extending across the Lower Great Lakes Tuesday.

LOZ062-231500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
435 AM EDT Sun Jul 23 2017

.TODAY...East winds 15 to 20 knots. A chance of showers this
morning...then a chance of showers and thunderstorms early this
afternoon. Showers and thunderstorms likely late. Some
thunderstorms may produce gusty winds late. Waves 1 to 3 feet
building to 2 to 4 feet.
.TONIGHT...East winds 15 to 25 knots becoming northeast. Showers
and thunderstorms in the evening...then showers likely with a
chance of thunderstorms after midnight. Some thunderstorms may
produce gusty winds in the evening. Waves 3 to 6 feet.
.MONDAY...Northeast winds 5 to 15 knots becoming northwest.
Showers likely with a chance of thunderstorms in the morning...
then a chance of showers and thunderstorms in the afternoon.
Waves 3 to 5 feet subsiding to 1 to 3 feet.
.MONDAY NIGHT...Northwest winds 10 to 15 knots becoming north
15 to 20 knots. Waves 1 to 3 feet building to 2 to 4 feet.
.TUESDAY...North winds 15 to 20 knots becoming southeast and
diminishing to 5 to 10 knots. Waves 3 to 5 feet subsiding to 1 to
2 feet.
.WEDNESDAY...Southeast winds 5 to 10 knots becoming southwest. A
chance of showers and thunderstorms Wednesday night. Waves 2 feet
or less.
.THURSDAY...West winds 5 to 10 knots becoming north. A chance of
showers and thunderstorms. Waves 1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-231500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
435 AM EDT Sun Jul 23 2017

.TODAY...East winds 15 to 20 knots becoming northeast. A chance
of showers through early afternoon...then a chance of showers and
thunderstorms late. Waves 1 to 3 feet building to 2 to 4 feet.
.TONIGHT...Northeast winds 15 to 25 knots becoming east. Showers
and thunderstorms in the evening...then showers with a chance of
thunderstorms after midnight. Some thunderstorms may produce
gusty winds in the evening. Waves 3 to 5 feet.
.MONDAY...Southeast winds 10 to 15 knots increasing to 15 to
20 knots. Showers with a chance of thunderstorms. Waves 2 to
4 feet.
.MONDAY NIGHT...South winds 15 to 20 knots becoming southeast. A
chance of showers and thunderstorms. Waves 2 to 4 feet.
.TUESDAY...Northeast winds 15 to 20 knots becoming southeast 5 to
15 knots. Waves 3 to 5 feet subsiding to 2 feet or less.
.WEDNESDAY...South winds 5 to 15 knots becoming southwest. A
chance of showers and thunderstorms Wednesday night. Waves 2 feet
or less.
.THURSDAY...Southwest winds 5 to 15 knots becoming northwest. A
chance of showers and thunderstorms. Waves 2 feet or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-231500-
MAFOR 2309/
ONTARIO WEST 1/2 11210 12220 12229 11239 12236. A chance of
showers this morning. A chance of thunderstorms overnight. Waves
1 to 3 feet building to 2 to 4 feet today. Waves 3 to 6 feet
tonight.

ONTARIO EAST 1/2 12210 11220 11120 11129 11229 12226. A chance of
showers this morning...then a chance of showers and thunderstorms
this afternoon. A chance of thunderstorms overnight. Waves 1 to 3
feet building to 2 to 4 feet today. Waves 2 to 4 feet tonight.

$$

JJR/TMA/WOOD



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