Mililani Mauka, Hawaii 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

726
FXHW60 PHFO 030640
AFDHFO

Area Forecast Discussion
National Weather Service Honolulu HI
840 PM HST Wed Apr 2 2025

.SYNOPSIS...
A cold front currently moving into Kauai and Niihau this evening
will stall out and weaken near the Kauai Channel from Thursday
into Friday. Expect wet weather across Kauai County during this
time period with some enhanced showers moving into Oahu. Trade
winds will begin to build back into the islands by Friday,
strengthening into the moderate to breezy range from Saturday
onward with periods of enhanced showers lasting through much of
next week.

&&

.DISCUSSION...
A cold frontal cloud band currently moving from west to east into
Kauai and Niihau this evening will produce wet weather across
Kauai County for the next two days. Trade winds will quickly
build in across the region behind the front over Kauai on Thursday
afternoon, then spread eastward across the state on Friday. Light
southerly winds tonight ahead of the front may produce brief
periods of showers for the other islands lasting into Thursday.

The latest short range model solutions continue to show the
forward motion on the front stalling out as the frontal boundary
moves into the Kauai Channel by Thursday night. Most islands will
continue to see light land and sea breeze weather conditions in
place through Thursday. Northeasterly trade winds will fill in
across the front over Kauai on Thursday, enhancing showers over
north and east slopes of the Garden Isle, and to some degree over
Oahu with this approaching frontal system. The frontal band will
then weaken over the Kauai Channel as easterly trade winds spread
across the state on Friday. Easterly trade winds will then push
the cloud band associated with the remnant cold front will then
drift westward back over Kauai and Niihau from late Friday into
Saturday. More typical trade wind weather remains in the forecast
for the rest of the state through the weekend.

The forecast next week shows a high confidence easterly trade
wind weather pattern continues with a period of enhanced showers
from a cloud band moving in from the north. This cloud band is
associated with the remnants of a dissipated frontal band
originating in the eastern Pacific. Enhanced shower activity will
favor windward and mountain areas during the Tuesday morning
through Friday morning time period. Higher chances for showers
are likely during the typical overnight to early morning hours.

&&

.AVIATION...
A frontal boundary approaching from the northwest will become
cause winds to become light and variable over the state tonight.
An uptick of showers over the western end of the state is expected
late tonight into Thursday as moisture streams in from the south
ahead of the front. Periods of MVFR are likely within the heavier
showers. The eastern half of the state will see moderate to
locally breezy southeasterly winds continue, with localized sea
breezes in sheltered areas. Conditions should remain mostly VFR.

No AIRMETs are currently in effect.

All areas will continue to see some Vog due to the ongoing eruption
of Kilauea. However, Vog is not expected to impact visibilities
enough to warrant a mention in any TAF.

&&

.MARINE...
A slow moving cold front over the far northwest waters will move
over Kauai tonight, stall just west of Oahu on Thursday, then
gradually dissipate. Light to moderate southeast winds ahead of
the front will weaken and become more southerly by morning. Behind
the front, winds will shift northerly. Moderate to locally strong
trade winds will reestablish themselves across the state Friday
night into Saturday and persist into the coming week.

The Small Craft Advisory (SCA) for locally accelerated east and
southeast winds in waters around the Big Island has been cancelled
as wind speeds have ease below criteria. SCA conditions may
return first for the western half of the state as early as Friday
then for the rest of the state over the weekend as strong
trades winds return and seas build to 10 feet or greater due to a
large north swell.

A small west northwest (290-310) swell will gradually fade
tonight. A small to moderate medium period north northwest swell
(330-340) will fill in Thursday keeping small surf through much of
the day. The swell will continue to build through Friday
generating surf near to just below advisory level along north and
west facing shores. A large to extra large, long period swell
(350-360) will quickly build in Saturday that will likely produce
warning level surf along north facing shores with advisory level
surf across west and east facing shores through the weekend. This
swell, aside from being hazardous to small craft, could generate
harbor surges along north facing bays and inlets.

Surf along south facing shores will remain tiny into the weekend
with mainly background energy dominating. A small long period
south swell may fill in later over the weekend into early next
week and provide a small boost to surf along south facing shores.

Surf along east facing shores will remain low through Thursday,
but bump up slightly over the weekend with the return of trade
wind flow over and upstream of the state.

&&

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

&&

$$

DISCUSSION...Bohlin
AVIATION...Shigesato
MARINE...Almanza