Ewa Gentry, Hawaii 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

271
FXHW60 PHFO 100142
AFDHFO

Area Forecast Discussion
National Weather Service Honolulu HI
342 PM HST Mon Jun 9 2025

.SYNOPSIS...
A trough to the west and a ridge to the northeast will drive
moderate to fresh east southeast winds through Tuesday, then
strengthen through the end of the week. Winds will focus clouds
and showers across windward and mauka areas.

&&

.DISCUSSION...
A surface trough to the west and a ridge to the northeast will
drive moderate to fresh east northeast winds across the state into
Tuesday. Incoming clouds and scattered showers will impact
windward and mauka areas. Stable, zonal flow aloft will keep
showers light this week.

The trough will gradually weaken Wednesday through Friday with
high pressure filling in north of the area. Trade winds across the
islands will strengthen around midweek as the trough begins to
fade. Trade winds will boost further this weekend. The rainfall
pattern will follow the typical diurnal trends with higher shower
coverage in the overnight to early morning hours, and then less
shower activity during the mid morning through afternoon time
period, and continue to favor windward and mauka areas through
the forecast period.

&&

.AVIATION...
A trough to the northwest of the state will interact with the high
to the far northeast, bringing light to moderate trades to the
Hawaiian Islands through Tuesday. A hybrid sea breeze and trade
wind pattern will persist over each island, with daytime sea
breezes developing along terrain sheltered western mountain
slopes. Downstream of each island, weak convergence will also
bring the potential for more showers this afternoon and again
tomorrow as the steering flow maintains a southeasterly component.
Otherwise, brief passing showers are possible over windward and
mountain areas with the trades, favoring the overnight to early
morning hours. Outside of any brief showers, VFR conditions will
prevail through Tuesday.

No AIRMETs are currently in effect this afternoon.

&&

.MARINE...
High pressure will remain centered far north-northeast of Hawaii
over the next several days. A developing trough northwest of the
state will briefly cause trade winds to veer out of the east-southeast
into Tuesday. As the trough weakens and moves away later Tuesday,
trades will strengthen into the moderate to locally strong range for
the second half of this week. Small Craft Advisory conditions could
return to the typical windy areas around Maui County and the Big
Island as early as Wednesday. As the ridge strengthens, widespread
fresh to strong trade winds are possible this weekend.

The current south-southwest (200 degrees) swell will continue to
decline over the next couple of days. A small, moderate-period south-
southwest swell (210 degrees) is possible Friday into the weekend.

Surf along east facing shores will remain moderate as the short-
period north swell holds through Monday. Strengthening trade winds
will gradually increase east shore waves during the second half
of the week and through the weekend.

Pulses of small short-period energy out of the north will continue
to move through Tuesday through the middle of the week to keep the
north shore surf from going completely flat.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$


DISCUSSION...Foster
AVIATION...Farris
MARINE...TS