531 

FZUS63 KMQT 161401
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 AM EDT Thu Apr 16 2026

For waters beyond 5 nautical miles of shore on Lake Superior.

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...

Weak ridging of around 29.8 inches persists over Lake Superior today
and tonight, then expect height falls into Friday morning before
troughing averaging 29.5 inches moves across the lake Friday evening
and Saturday morning. Ridging builds over Lake Superior the
remainder of Saturday and throughout Sunday, reaching about 30.3
inches Monday morning. This gives way quickly to troughing Monday
evening as a low swings southeast through Ontario toward James Bay,
decreasing to around 29.6 by Monday evening.


LSZ162-162000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 AM EDT Thu Apr 16 2026 /900 AM CDT Thu Apr 16 2026/

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM EDT /7 PM CDT/ THIS
EVENING...

.REST OF TODAY...Southwest winds 5 to 15 knots backing east late.
Areas of dense fog by late morning, then patchy fog by mid
afternoon. Waves calm to 2 feet.
.TONIGHT...Northeast winds 10 to 20 knots. Patchy fog. A slight
chance of rain and snow showers after midnight. Waves building to
1 to 3 feet.
.FRIDAY...East winds 10 to 20 knots backing northeast in the
afternoon, then backing northwest late. Patchy fog through early
afternoon. Rain showers and a chance of thunderstorms by mid
afternoon. Waves 1 to 3 feet.
.FRIDAY NIGHT...West winds 15 to 25 knots increasing to 20 to
30 knots after midnight. A chance of rain showers, possibly mixed
with snow and thunderstorms through midnight. Waves building to
3 to 5 feet occasionally to 7 feet.
.SATURDAY...West winds 20 to 30 knots. Waves building to 3 to
6 feet occasionally to 8 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots. Waves subsiding
to 1 to 3 feet.
.SUNDAY...Northwest winds 10 to 20 knots becoming north 5 to
15 knots. Waves subsiding to calm to 2 feet.
.MONDAY...South winds 5 to 15 knots becoming west 10 to 20 knots.
Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet.

$$

LSZ263-162000-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
1000 AM EDT Thu Apr 16 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.REST OF TODAY...Southwest winds less than 10 knots increasing to
5 to 15 knots in the afternoon, then backing east late. Areas of
dense fog. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots. Patchy fog. A slight chance
of rain showers after midnight. Waves building to 1 to 3 feet.
.FRIDAY...East winds 10 to 20 knots becoming south 15 to 25 knots
late. Patchy fog through early afternoon. A chance of showers and
thunderstorms by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY NIGHT...West winds 20 to 30 knots. Rain showers likely
and a slight chance of thunderstorms through midnight, then a
slight chance of rain showers, snow showers and sleet after
midnight. Waves building to 5 to 8 feet occasionally to 10 feet.
.SATURDAY...West winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. Waves building to 7 to 10 feet
occasionally to 13 feet.
.SATURDAY NIGHT...Northwest gales to 35 knots. Waves subsiding to
4 to 7 feet occasionally to 9 feet.
.SUNDAY...Northwest winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.
.MONDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. Waves building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ264-162000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 AM EDT Thu Apr 16 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.REST OF TODAY...Southwest winds less than 10 knots veering west
in the afternoon, then becoming east 5 to 15 knots late. Areas of
dense fog. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering southeast after
midnight, then increasing to 10 to 20 knots late. Areas of dense
fog. A slight chance of rain showers after midnight. Waves
building to 1 to 3 feet.
.FRIDAY...Southeast winds 15 to 25 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible. Patchy fog
through early afternoon. A chance of rain showers and a slight
chance of thunderstorms by mid afternoon. Waves building to 6 to
9 feet occasionally to 11 feet.
.FRIDAY NIGHT...South gales to 35 knots becoming west 20 to
30 knots after midnight. Rain showers and a slight chance of
thunderstorms through midnight, then a chance of rain showers
after midnight. Waves building to 7 to 10 feet occasionally to
13 feet, then subsiding to 5 to 8 feet occasionally to 10 feet.
.SATURDAY...West gales to 35 knots. Waves building to 5 to 9 feet
occasionally to 11 feet.
.SATURDAY NIGHT...Northwest gales to 35 knots. Waves subsiding to
5 to 8 feet occasionally to 10 feet.
.SUNDAY...Northwest winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to 1 to 3 feet.
.MONDAY...South winds 10 to 20 knots increasing to 20 to
30 knots. Waves subsiding to calm to 2 feet, then building to
4 to 7 feet occasionally to 9 feet.

$$

LSZ265-162000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 AM EDT Thu Apr 16 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.REST OF TODAY...West winds 5 to 15 knots backing east in the
afternoon. Areas of dense fog. Waves calm to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots increasing to 15 to
25 knots late. Areas of dense fog. Waves building to 1 to 3 feet.
.FRIDAY...Southeast winds 15 to 25 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible. Patchy fog
through early afternoon. A slight chance of rain showers by mid
afternoon. Waves building to 6 to 9 feet occasionally to 11 feet.
.FRIDAY NIGHT...South gales to 35 knots veering west after
midnight. Rain showers and a slight chance of thunderstorms
through midnight, then a chance of rain showers after midnight.
Waves subsiding to 3 to 6 feet occasionally to 8 feet, then
building to 4 to 7 feet occasionally to 9 feet.
.SATURDAY...West gales to 40 knots. A slight chance of rain
showers and sleet through early afternoon. A slight chance of
snow showers. Waves building to 6 to 9 feet occasionally to
11 feet.
.SATURDAY NIGHT...Northwest gales to 40 knots. Waves subsiding to
5 to 8 feet occasionally to 10 feet.
.SUNDAY...Northwest gales to 35 knots diminishing to 10 to
20 knots. Waves subsiding to 1 to 3 feet.
.MONDAY...Southeast winds 10 to 20 knots becoming south 20 to
30 knots. Waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet.

$$

LSZ266-162000-
Lake Superior East of a line from Manitou Island to Marquette MI
and West of a line from Grand Marais MI to the US/Canadian Border
Beyond 5NM from shore-
1000 AM EDT Thu Apr 16 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.REST OF TODAY...Northwest winds 5 to 15 knots veering east late.
Areas of dense fog. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots becoming southeast 10 to
20 knots after midnight. Areas of dense fog. Waves building to
1 to 3 feet.
.FRIDAY...Southeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon, then becoming south to 30 knots with a
few gale force gusts to 40 knots possible late. Patchy fog
through early afternoon. Waves building to 6 to 9 feet
occasionally to 11 feet.
.FRIDAY NIGHT...South gales to 40 knots becoming west gales to
35 knots after midnight. A chance of thunderstorms through
midnight. Rain showers. Waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.
.SATURDAY...West gales to 40 knots. A slight chance of rain
showers through early afternoon. A slight chance of snow showers.
Waves building to 10 to 14 feet occasionally to 18 feet.
.SATURDAY NIGHT...Northwest gales to 40 knots. A chance of snow
showers. Waves subsiding to 9 to 12 feet occasionally to 15 feet.
.SUNDAY...Northwest gales to 35 knots diminishing to 15 to
25 knots. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.MONDAY...South winds 10 to 20 knots increasing to gales to
35 knots. Waves subsiding to 1 to 3 feet, then building to 5 to
8 feet occasionally to 10 feet.

$$

LSZ267-162000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 AM EDT Thu Apr 16 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.REST OF TODAY...Northwest winds 5 to 15 knots. Patchy fog. Waves
calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering southeast after
midnight. Areas of dense fog. Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots increasing to 20 to
30 knots. Patchy fog through early afternoon. Waves building to
4 to 7 feet occasionally to 9 feet.
.FRIDAY NIGHT...Southeast gales to 35 knots veering south after
midnight. Rain showers and a slight chance of thunderstorms.
Waves building to 5 to 8 feet occasionally to 10 feet.
.SATURDAY...West gales to 40 knots. A chance of rain showers. A
slight chance of snow showers by mid afternoon. Waves building to
10 to 14 feet occasionally to 18 feet.
.SATURDAY NIGHT...West gales to 35 knots veering northwest after
midnight. A chance of snow showers. Waves subsiding to 9 to
12 feet occasionally to 15 feet.
.SUNDAY...Northwest gales to 35 knots diminishing to 15 to
25 knots. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.MONDAY...South winds 10 to 20 knots increasing to 20 to
30 knots. Waves subsiding to 1 to 3 feet, then building to 5 to
8 feet occasionally to 10 feet.

$$

LSZ261-162000-
MAFOR 1615/
Superior West 11504 12200 11110 11110 19114 13210. Waves 2 feet
or less this afternoon and tonight. Waves 2 to 3 feet Friday
morning.

Superior North Central 12604 11304 11214 11324 11314 11324 11330.
Waves 2 feet or less this afternoon and tonight. Waves 1 to 3
feet building to 2 to 4 feet Friday morning.

Superior South Central 11604 11104 11210 12314 11324 12330. Waves
2 feet or less this afternoon and tonight. Waves 2 to 4 feet
building to 3 to 5 feet Friday morning.

Superior East 12700 11800 11200 11304 11314 11324 11320. Waves 1
foot or less this afternoon and tonight. Waves 1 to 3 feet Friday
morning.

$$

WFO MQT

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes






449 

FZUS63 KMKX 161408
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
908 AM CDT Thu Apr 16 2026

FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON Lake Michigan.

Waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.SYNOPSIS...

A stationary front will remains stalled the middle portion of the
lake. It will slowly sink south to the southern end of the lake
by noon today. While the front will be departing, light winds will
support continued dense fog potential through tonight. Marine
Dense Fog Advisory is now in effect until 7 AM Friday morning.

Winds will become light and variable briefly tonight as a weak
ridge passes over the lake tonight, with winds then becoming
southerly and breezy Friday ahead of low pressure of 29.6 inches
approaching from the west. Gusty northwest winds then return
following a cold front Friday night. Thunderstorms are possible
Friday evening into Saturday morning. Some storms could be strong
to severe, with gusty winds and large hail being the primary
concerns.

LMZ261-362-364-366-563-565-567-868-162115-
Lake Michigan from Seul Choix Point to Rock Island Passage 5 NM
offshore to Mid Lake-
Lake Michigan South of a line from Seul Choix Point to the
Mackinac Bridge and north of a line from Charlevoix MI to South
Fox Island 5 NM offshore-
Lake Michigan from Charlevoix to Point Betsie MI 5 NM offshore to
Mid Lake-
Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to
Mid Lake-
Lake Michigan from Rock Island Passage to Sturgeon Bay WI-
Lake Michigan from Sturgeon Bay to Two Rivers WI 5 NM offshore to
Mid Lake-
Lake Michigan from Two Rivers to Sheboygan WI 5 NM offshore to
Mid Lake-
Lake Michigan from Pentwater to Manistee MI 5 NM offshore to Mid
Lake-
908 AM CDT Thu Apr 16 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL 7 AM CDT FRIDAY...

.REST OF TODAY...North winds 10 to 15 kt becoming northwest.
Slight chance of rain showers late this morning. Areas of dense
fog late this morning, then patchy dense fog this afternoon.
Waves 1 to 2 ft.
.TONIGHT...South winds 5 to 10 kt becoming southeast. Areas of
dense fog. Waves 1 to 2 ft.
.FRIDAY...Southeast winds 10 to 15 kt increasing to 15 to 25 kt.
Areas of dense fog in the morning. Waves 1 to 2 ft building to
3 to 5 ft.
.FRIDAY NIGHT...South winds to 30 kt. Rain showers with a chance
of thunderstorms. Waves 6 to 9 ft occasionally to 12 ft.
.SATURDAY...West winds 15 to 25 kt. Rain showers in the morning,
then chance of rain showers in the afternoon. Waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft.
.SATURDAY NIGHT...Northwest winds 15 to 25 kt increasing to
30 kt. Waves 4 to 6 ft occasionally to 8 ft.
.SUNDAY...Northwest winds to 30 kt. Waves 4 to 7 ft occasionally
to 9 ft.
.MONDAY...Southwest winds 10 to 20 kt becoming south. Waves 2 to
4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-162115-
Lake Michigan from Michigan City IN to St. Joseph MI 5 NM
offshore to Mid Lake-
Lake Michigan from Sheboygan to Port Washington WI 5 NM offshore
to Mid Lake-
Lake Michigan from Port Washington to North Point Light WI 5 NM
offshore to Mid Lake-
Lake Michigan from North Point Light to Wind Point WI 5 NM
offshore to Mid Lake-
Lake Michigan from Wind Point WI to Winthrop Harbor IL 5 NM
offshore to Mid Lake-
Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5 NM
offshore to Mid Lake-
Lake Michigan from Wilmette Harbor IL to Michigan City IN 5 NM
offshore to Mid Lake-
Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid
Lake-
Lake Michigan from Grand Haven to Whitehall MI 5 NM offshore to
Mid Lake-
Lake Michigan from Holland to Grand Haven MI 5 NM offshore to Mid
Lake-
Lake Michigan from South Haven to Holland MI 5 NM offshore to Mid
Lake-
Lake Michigan from St. Joseph to South Haven MI 5 NM offshore to
Mid Lake-
908 AM CDT Thu Apr 16 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL 7 AM CDT FRIDAY...

.REST OF TODAY...Northwest winds 15 to 25 kt becoming north 10 to
20 kt. Chance of rain showers and slight chance of thunderstorms
late this morning. Patchy dense fog. Waves 1 to 3 ft.
.TONIGHT...North winds 10 to 15 kt veering to southeast. Patchy
dense fog in the evening, then areas of dense fog overnight.
Waves 1 to 2 ft subsiding to 1 ft or less.
.FRIDAY...Southeast winds 10 to 15 kt increasing to 15 to 25 kt.
Areas of dense fog in the morning. Waves 1 to 2 ft building to
3 to 5 ft.
.FRIDAY NIGHT...South winds to 30 kt becoming southwest 15 to
25 kt. Rain showers with a chance of thunderstorms. Waves 5 to
8 ft occasionally to 10 ft.
.SATURDAY...West winds 15 to 25 kt. Rain showers in the morning,
then chance of rain showers in the afternoon. Waves 5 to 8 ft
occasionally to 10 ft.
.SATURDAY NIGHT...West winds 15 to 25 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.SUNDAY...Northwest winds 15 to 25 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.MONDAY...East winds 10 to 20 kt becoming southeast. Waves 2 to
4 ft.

$$

LMZ761-162115-
MAFOR 1616/
MICHIGAN NORTH 11810 19814 12710 19714 11400 19404 12404 11314
11420. Waves 2 feet or less.

MICHIGAN SOUTH 12720 19724 11810 19814 11800 19804 12304 11314
11320. A chance of rain showers late this morning. Waves 2 feet
or less.

$$


CMiller

Experimental modernized open lake forecast is available online at
weather.gov/mkx/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes






960 

FZUS61 KBUF 161410
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1010 AM EDT Thu Apr 16 2026

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 29.6 inch low will move across the central Great Lakes
today before reaching southern Quebec tonight, then drift off the
New England coast by Friday night. A 30.0 inch high is then forecast
to build from the central Great Lakes Friday to the lower Great
Lakes Saturday morning, then off the east coast Saturday night. A
29.3 inch surface low to the north of Lake Superior Saturday will
deepen to 28.9 inches by Sunday, with a trailing cold front crossing
the Lake Saturday night. A 30.4 inch surface high will push from the
Plains to the Upper Ohio Valley from Sunday through Monday. The high
is expected to move off the Mid-Atlantic coast Tuesday.

LOZ062-162100-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1010 AM EDT Thu Apr 16 2026

.REST OF TODAY...South winds 10 to 15 knots becoming southwest
15 to 20 knots. Patchy fog. Showers likely late this morning,
then showers with a chance of thunderstorms this afternoon. Waves
1 to 3 feet building to 2 to 4 feet.
.TONIGHT...Southwest winds 15 to 20 knots becoming northwest and
diminishing to 5 to 10 knots. Showers likely with a chance of
thunderstorms early, then a chance of showers. Patchy fog from
late evening on. Waves 2 to 4 feet subsiding to 1 to 2 feet.
.FRIDAY...Northwest winds 10 knots or less becoming south. Patchy
fog in the morning. Waves 1 foot or less.
.FRIDAY NIGHT...Southeast winds 10 knots or less becoming east.
Waves 1 foot or less.
.SATURDAY...Southeast winds 10 to 15 knots becoming west 15 to
20 knots. Showers. Waves 2 feet or less building to 2 to 4 feet.
.SUNDAY...West winds 15 to 25 knots becoming northwest. A chance
of rain showers. Waves 3 to 6 feet building to 4 to 7 feet. Waves
occasionally around 9 feet.
.MONDAY...Northwest winds 15 to 25 knots becoming southwest and
diminishing to 10 to 15 knots. Waves 4 to 7 feet subsiding to
1 to 3 feet. Waves occasionally around 9 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-162100-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1010 AM EDT Thu Apr 16 2026

.REST OF TODAY...South winds 10 to 15 knots becoming southwest.
Patchy fog. Showers late this morning, then showers with a chance
of thunderstorms this afternoon. Some thunderstorms may produce
gusty winds late. Waves 1 to 3 feet.
.TONIGHT...Southwest winds 5 to 15 knots becoming northwest.
Showers with a chance of thunderstorms early, then showers likely
late in the evening. A chance of showers after midnight. Patchy
fog from late evening on. Some thunderstorms may produce gusty
winds early. Waves 1 to 3 feet.
.FRIDAY...Northwest winds 10 knots or less becoming west. Patchy
fog in the morning. Waves 2 feet or less.
.FRIDAY NIGHT...Southwest winds 10 knots or less becoming
southeast. Waves 1 foot or less.
.SATURDAY...Southeast winds 10 to 15 knots becoming west 15 to
20 knots. Showers likely. Waves 1 to 3 feet building to 3 to
5 feet.
.SUNDAY...West winds 15 to 25 knots becoming northwest to
30 knots. Rain showers likely during the day, then a chance of
rain showers Sunday night. Waves 3 to 6 feet building to 5 to
9 feet. Waves occasionally around 11 feet.
.MONDAY...Northwest winds 15 to 25 knots becoming west. Waves
5 to 9 feet subsiding to 3 to 5 feet. Waves occasionally around
11 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-162100-
MAFOR 1615/
ONTARIO WEST 1/2 11510 11526 11516 11610 11600 13700. A chance of
thunderstorms this afternoon and evening. Waves 1 to 3 feet
building to 2 to 4 feet this afternoon. Waves 2 to 4 feet
subsiding to 1 to 2 feet tonight. Waves 2 feet or less Friday
morning.

ONTARIO EAST 1/2 11400 12516 11510 11600 13700. A chance of
thunderstorms this afternoon and evening. Waves 1 to 3 feet.

$$







682 

FZUS61 KBUF 161412
GLFSL

Forecast for the Saint Lawrence River
including the Thousand Islands Region
National Weather Service Buffalo NY
1011 AM EDT Thu Apr 16 2026

SLZ022-024-162100-
Saint Lawrence River from Cape Vincent to Saint Regis
1011 AM EDT Thu Apr 16 2026

.REST OF TODAY...South winds 5 to 10 knots becoming southwest.
Patchy fog. Showers late this morning, then showers with a chance
of thunderstorms this afternoon.
.TONIGHT...Southwest winds 10 knots or less becoming north.
Showers likely with a chance of thunderstorms early, then showers
likely late in the evening. A chance of showers after midnight.
Patchy fog from late evening on.
.FRIDAY...North winds less than 10 knots. A chance of showers in
the morning.
.FRIDAY NIGHT...Light and variable winds. Mainly clear in the
evening, then becoming partly cloudy.
.SATURDAY...Southeast winds 10 to 15 knots becoming southwest. A
chance of showers during the day, then showers Saturday night.
.SUNDAY...West winds 5 to 15 knots. Rain showers likely during
the day, then a chance of rain showers Sunday night.
.MONDAY...Northwest winds 5 to 10 knots becoming west. Partly
cloudy.

Winds and waves higher in and near thunderstorms.

$$







853 

FZUS61 KBUF 161422
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1022 AM EDT Thu Apr 16 2026

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 29.6 inch low will move across the central Great Lakes
today before reaching southern Quebec tonight, then drift off the
New England coast by Friday night. A 30.0 inch high is then forecast
to build from the central Great Lakes Friday to the lower Great
Lakes Saturday morning, then off the east coast Saturday night. A
29.3 inch surface low to the north of Lake Superior Saturday will
deepen to 28.9 inches by Sunday, with a trailing cold front crossing
the Lake Saturday night. A 30.4 inch surface high will push from the
Plains to the Upper Ohio Valley from Sunday through Monday. The high
is expected to move off the Mid-Atlantic coast Tuesday.

LOZ062-162100-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1022 AM EDT Thu Apr 16 2026

.REST OF TODAY...South winds 10 to 15 knots becoming southwest
15 to 20 knots. A chance of showers late this morning, then
showers with a chance of thunderstorms this afternoon. Some
thunderstorms may produce gusty winds this afternoon. Waves 1 to
3 feet building to 2 to 4 feet.
.TONIGHT...Southwest winds 5 to 15 knots becoming northwest.
Showers likely with a chance of thunderstorms early, then a
chance of showers. Patchy fog from late evening on. Some
thunderstorms may produce gusty winds early. Waves 2 to 4 feet
subsiding to 1 to 2 feet.
.FRIDAY...Northwest winds 10 knots or less becoming south. Patchy
fog in the morning. Waves 1 foot or less.
.FRIDAY NIGHT...Southeast winds 10 knots or less becoming east.
Waves 1 foot or less.
.SATURDAY...Southeast winds 10 to 15 knots becoming west 15 to
20 knots. Showers. Waves 2 feet or less building to 2 to 4 feet.
.SUNDAY...West winds 15 to 25 knots becoming northwest. A chance
of rain showers. Waves 3 to 6 feet building to 4 to 7 feet. Waves
occasionally around 9 feet.
.MONDAY...Northwest winds 15 to 25 knots becoming southwest and
diminishing to 10 to 15 knots. Waves 4 to 7 feet subsiding to
1 to 3 feet. Waves occasionally around 9 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-162100-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1022 AM EDT Thu Apr 16 2026

.REST OF TODAY...South winds 10 to 15 knots becoming southwest.
Showers likely late this morning, then showers with a chance of
thunderstorms this afternoon. Some thunderstorms may produce
gusty winds this afternoon. Waves 1 to 3 feet.
.TONIGHT...Southwest winds 5 to 15 knots becoming northwest.
Showers with a chance of thunderstorms early, then showers likely
late in the evening. A chance of showers after midnight. Patchy
fog from late evening on. Some thunderstorms may produce gusty
winds early. Waves 1 to 3 feet.
.FRIDAY...Northwest winds 10 knots or less becoming west. Patchy
fog in the morning. Waves 2 feet or less.
.FRIDAY NIGHT...Southwest winds 10 knots or less becoming
southeast. Waves 1 foot or less.
.SATURDAY...Southeast winds 10 to 15 knots becoming west 15 to
20 knots. Showers likely. Waves 1 to 3 feet building to 3 to
5 feet.
.SUNDAY...West winds 15 to 25 knots becoming northwest to
30 knots. Rain showers likely during the day, then a chance of
rain showers Sunday night. Waves 3 to 6 feet building to 5 to
9 feet. Waves occasionally around 11 feet.
.MONDAY...Northwest winds 15 to 25 knots becoming west. Waves
5 to 9 feet subsiding to 3 to 5 feet. Waves occasionally around
11 feet.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-162100-
MAFOR 1615/
ONTARIO WEST 1/2 11520 11526 11516 11610 11600 13700. A chance of
thunderstorms this afternoon and evening. Waves 1 to 3 feet
building to 2 to 4 feet this afternoon. Waves 2 to 4 feet
subsiding to 1 to 2 feet tonight. Waves 2 feet or less Friday
morning.

ONTARIO EAST 1/2 11406 12516 11510 11600 13700. A chance of
thunderstorms this afternoon and evening. Waves 1 to 3 feet.

$$







033 

FZUS61 KBUF 161424
GLFSL

Forecast for the Saint Lawrence River
including the Thousand Islands Region
National Weather Service Buffalo NY
1023 AM EDT Thu Apr 16 2026

SLZ022-024-162100-
Saint Lawrence River from Cape Vincent to Saint Regis
1023 AM EDT Thu Apr 16 2026

.REST OF TODAY...Southeast winds 5 to 10 knots becoming
southwest. Patchy fog late this morning. Showers likely late this
morning, then showers with a chance of thunderstorms this
afternoon. Some thunderstorms may produce gusty winds this
afternoon.
.TONIGHT...Southwest winds 10 knots or less becoming north.
Showers with a chance of thunderstorms early, then showers likely
late in the evening. A chance of showers after midnight. Patchy
fog from late evening on. Some thunderstorms may produce gusty
winds early.
.FRIDAY...North winds less than 10 knots. A chance of showers in
the morning.
.FRIDAY NIGHT...Light and variable winds. Mainly clear in the
evening, then becoming partly cloudy.
.SATURDAY...Southeast winds 10 to 15 knots becoming southwest. A
chance of showers during the day, then showers Saturday night.
.SUNDAY...West winds 5 to 15 knots. Rain showers likely during
the day, then a chance of rain showers Sunday night.
.MONDAY...Northwest winds 5 to 10 knots becoming west. Partly
cloudy.

Winds and waves higher in and near thunderstorms.

$$