076
FNUS70 PHFO 182055
FWSHFO

Spot Forecast for Wahiawa Reservoir Forecast...C&C
National Weather Service Honolulu HI
1055 AM HST Tue Aug 18 2026

Forecast is based on forecast start time of 1100 HST on August 18.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...
A more seasonable trade wind pattern has returned to the state with
the exit of Tropical Cyclone Lala. Expect typical trade wind showers
focused along windward and mauka areas through tonight. Trade
winds weaken Wednesday into the latter half of the week as a
trough passes northeast of the islands, setting up a daytime sea
breeze and overnight land breeze regime. A trough also brings an
increase in moisture that will produce an uptick in shower
activity through Friday. This weekend, trade winds restrengthen.
Looking ahead to early next week, an increase in shower activity
is possible as deeper tropical moisture could move over portions
of the state.

As far as rainfall amounts for the rest of this week, total accumulation
between now and 6pm Saturday is forecast to remain under 1 inch at this
time.

.REST OF TODAY...

Sky/weather.........Sunny.
Chance of pcpn......10 percent.
Max temperature.....Around 84.
Min humidity........53 percent.
Surface winds (mph).East winds around 13 mph.

.TONIGHT...

Sky/weather.........Partly cloudy. Isolated showers.
Chance of pcpn......20 percent.
Min temperature.....Around 70.
Max humidity........89 percent.
Surface winds (mph).East winds 8 to 10 mph shifting to the south
                    overnight.

.WEDNESDAY...

Sky/weather.........Mostly cloudy. Isolated showers.
Chance of pcpn......20 percent.
Max temperature.....Around 85.
Min humidity........52 percent.
Surface winds (mph).East winds 5 to 9 mph.

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY...
Mostly cloudy. Scattered showers. Lows in the lower 70s. Highs in
the mid 80s. Northeast winds around 7 mph.
.FRIDAY...
Mostly cloudy. Scattered showers. Lows in the lower 70s. Highs in
the upper 80s. Light winds.
.SATURDAY...
Partly cloudy. Scattered showers. Lows in the lower 70s. Highs in
the mid 80s. East winds around 10 mph.

$$
Forecaster...Vaughan
Requested by...Josh Fulbright
Type of request...OTHER
.TAG 2619965.0/HFO
.DELDT 08/18/26
.FormatterVersion 2.0.0
.EMAIL thomas.vaughan@noaa.gov