Lala Approaching Hawaii; Flash Flooding Risks; Excessive Heat

Lala, may become a hurricane, is expected to impact Hawaii this weekend. Heavy rainfall, strong winds, dangerous surf and localized flooding are expected. Heavy rainfall and flash flooding concerns from the mid-Mississippi Valley, Ohio Valley into the central Appalachians continues, with the threat shifting toward the mid-Atlantic later this weekend. Record heat continues for areas of the South. Read More >

NZUS99 KBUF 152352
GLFLOT

Experimental Tabular Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
752 PM EDT Sat Aug 15 2026

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 30.2 inch ridge will move east acorss New England tonight. A 29.7
inch low will move southeast from the northern Great Lakes to
southern New England tonight through Monday. A warm front will drift
northeast across Lake Ontario late Sunday before a cold front sweeps
east across the lake Sunday night. Behind the cold front, a trough
averaging 29.8 inches should linger over Lake Ontario Monday. A 30.o
inch high should build from the Upper Midwest Monday night and
traverse Lake Ontario Tuesday. This ridge should exit slowly
eastward Tuesday night through Wednesday as a cold front approaches
from the northwest. A 30.1 inch high will build across the eastern
Great Lakes region Thursday.

LOZ062-160800-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
752 PM EDT Sat Aug 15 2026

.Overnight...
Weather.............Partly cloudy.
Sfc winds...........East 15 to 20 knots.
100-ft winds........East 20 to 25 knots.
Sig waves...........3 to 5 feet.
Ocnl waves..........Around 6 feet.

.SUNDAY...
Weather.............Partly sunny.
Sfc winds...........East 10 to 15 knots.
100-ft winds........East 15 to 20 knots.
Sig waves...........2 to 4 feet.

.SUNDAY NIGHT...
Weather.............Mostly cloudy with chance of showers and
                              thunderstorms, then mostly cloudy after
                              midnight.
Sfc winds...........East 5 to 10 knots becoming west after
                              midnight.
100-ft winds........East 10 to 15 knots becoming west after
                              midnight.
Sig waves...........1 to 3 feet.

.MONDAY...
Weather.............Mostly sunny.
Sfc winds...........West 10 to 15 knots.
100-ft winds........West 15 to 20 knots.
Sig waves...........2 to 4 feet.

.MONDAY NIGHT...
Weather.............Mostly clear.
Sfc winds...........Northwest 10 to 15 knots.
100-ft winds........Northwest 15 to 20 knots.
Sig waves...........2 to 4 feet.

.FORECAST DAYS 3 THROUGH 5......
.TUESDAY...Chance of showers after midnight. West winds 5 to
10 knots. Waves 2 to 4 feet.
.WEDNESDAY...Chance of showers in the morning, then showers
likely with a chance of thunderstorms in the afternoon and
evening. West winds 10 to 15 knots. Waves 2 to 4 feet.
.THURSDAY...Northwest winds 5 to 10 knots. Waves 1 to 3 feet.

$$

LOZ063>065-160800-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
Lake Ontario open waters from Sodus Bay to Mexico Bay-
Lake Ontario open waters from Mexico Bay to the Saint Lawrence
River-
752 PM EDT Sat Aug 15 2026

.Overnight...
Weather.............Mostly clear.
Sfc winds...........North 10 to 15 knots becoming east after
                              midnight.
100-ft winds........North 15 to 20 knots becoming east after
                              midnight.
Sig waves...........2 to 4 feet.

.SUNDAY...
Weather.............Partly sunny.
Sfc winds...........Southeast 10 to 15 knots.
100-ft winds........Southeast 15 to 20 knots.
Sig waves...........2 to 4 feet.

.SUNDAY NIGHT...
Weather.............Mostly cloudy with chance of showers and
                              thunderstorms, then mostly cloudy with chance
                              of showers after midnight.
Sfc winds...........South 10 to 15 knots.
100-ft winds........South 15 to 20 knots.
Sig waves...........2 to 4 feet.

.MONDAY...
Weather.............Partly sunny.
Sfc winds...........South 10 to 15 knots becoming northwest in the
                              afternoon.
100-ft winds........South 15 to 20 knots becoming northwest in the
                              afternoon.
Sig waves...........2 to 4 feet.

.MONDAY NIGHT...
Weather.............Partly cloudy.
Sfc winds...........West 10 to 15 knots.
100-ft winds........West 15 to 20 knots.
Sig waves...........2 to 4 feet.

.FORECAST DAYS 3 THROUGH 5......
.TUESDAY...West winds 5 to 10 knots. Waves 2 to 4 feet.
.WEDNESDAY...Chance of showers in the morning, then showers
likely with a chance of thunderstorms in the afternoon and
evening. chance of showers after midnight. South winds 10 to
15 knots. Waves 2 to 4 feet.
.THURSDAY...Northwest winds 5 to 10 knots. Waves 2 to 4 feet.

$$

LOZ061-160800-
MAFOR 1603/
ONTARIO WEST 1/2 11320 13310 13200 11400. A chance of showers and
thunderstorms Sunday evening. Waves 1 to 3 feet overnight and
Sunday. Waves 1 foot or less Sunday evening.

ONTARIO EAST 1/2 11210 11300 12310 12300 11310 11416. A chance of
thunderstorms Sunday evening. Waves 1 to 3 feet overnight. Waves
2 feet or less Sunday and Sunday evening.

$$