Kapolei, Hawaii 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

992
FXHW60 PHFO 121333
AFDHFO

Area Forecast Discussion
National Weather Service Honolulu HI
333 AM HST Thu Jun 12 2025

.SYNOPSIS...

Breezy trades become locally strong this weekend into next week
delivering limited clouds and showers mainly to windward and mauka
areas.


&&

.DISCUSSION...


Surface high pressure northeast of the state is maintaining
moderate to locally strong trades. Satellite and radar imagery
show numerous clouds moving westward within the tradewind flow
with embedded light to moderate scattered showers focusing mainly
along windward and mauka areas. This area of enhanced showers
should persist through the morning hours and then dry out in the
afternoon. This pattern will repeat again tonight into early
Friday morning but may be a little wetter, especially for the
Western half of the state as the upper level low opens to a
trough and slowly sags southeastward and low level moisture
remains slightly above normal. Aloft, the resident subtropical jet
funnels high clouds across area skies.

The upper level trough is expected to move directly over the
islands this weekend and form into a weak upper level low which
will produce some instability across the state. At the same time a
surface high will develop north of the state, strengthening
tradewind flow across the state. This would generally equate to
enhance showers but one limiting factor may be available moisture
as drier air filters in from the east within the tradewind flow.
Thus, seasonably dry trades could persist this weekend into next
week. The best opportunity for showers will be windward/mauka
zones mainly overnight.

&&

.AVIATION...

A stable, moderate to locally breezy trade wind flow will persist
for the next couple of days. Periods of MVFR ceiling and
visibility in SHRA will focused along windward slopes especially
during the overnight and early morning hours. AIRMET SIERRA has
been issued for MTN OBSC due to clouds and showers building along
windward slopes and will likely continue through the morning
hours. VFR will dominate over most leeward areas, but sheltered
terrain will experience isolated MVFR conditions each afternoon,
especially on the Kona slopes of the Big Island. The stable trade
wind flow will produce light turbulence below 7,000 feet, but
these condition should not require SIGMET Tango through today. An
upper-level low to the west will send high clouds over the state
and may produce some light turbulence above FL300.


&&

.MARINE...

High pressure far northeast of the islands will remain nearly
stationary through the remainder of this week and bring moderate
to locally strong trade winds. Another area of high pressure will
then build north of the region this weekend and help to further
strengthen trades. Thus, a Small Craft Advisory for the windier
waters and channels around Maui County and the Big Island remains
in effect through at least Sunday.

Surf along south facing shores will be tiny, well below average,
over the next several days. A small, long period, south swell
originating from a fetch near New Zealand will build late this
weekend and help to boost surf heights through early next week.

There will be choppy surf along east facing shores through the
forecast period due to the moderate trades. Expect tiny surf
along north facing shores, which is typical for this time of
year.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
Small Craft Advisory until 6 PM HST Sunday for Maalaea Bay-
Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big
Island Southeast Waters.


&&

$$


DISCUSSION...Almanza
AVIATION...Almanza
MARINE...Thomas