FXHW60 PHFO 130638
AFDHFO

Area Forecast Discussion
National Weather Service Honolulu HI
838 PM HST Wed Jun 12 2024

.SYNOPSIS...
A high pressure ridge will linger north of the Hawaiian Islands
through the week producing moderate to breezy trade winds. Weak
upper level troughing will keep brief periods of windward showers
in the forecast favoring windward and mountain areas with drier
conditions over leeward locations. Clouds and showers will develop
along the Kona slopes of the Big Island each afternoon and
evening.

&&

.DISCUSSION...
A fairly typical moderate to breezy trade wind weather pattern
will continue as a high pressure ridge remains locked in place
north of the Hawaiian Islands into next week. Weak upper level
troughing will keep the trade wind temperature inversion heights
between 5,000 to 7,000 feet for much of the forecast period. Trade
wind inversion heights at this level will keep brief periods of
shower activity in the forecast, mainly over windward and mountain
areas as the trade winds lift the moisture over the windward
mountain peaks. Shower activity in these windward mountain areas
will trend higher in the overnight to early morning hours. Drier
conditions are forecast over leeward locations. High level cirrus
clouds will move over the state into the weekend, enhancing
sunrise and sunset colors.

Not much day to day changes in the weather forecast over the next
seven days. A slight increasing trend in the easterly trade wind
speeds may develop around the middle of next week.

&&

.AVIATION...
Moderate to breezy trade winds will persist over the next couple
of days. SHRA and low cigs will favor windward and mauka areas
bringing brief periods of MVFR conds. Otherwise, VFR conds should
prevail.

AIRMET Sierra for mtn obsc is in effect for windward portions of
the smaller islands. This AIRMET may be needed for windward areas
along portions of the island chain overnight into tomorrow
morning.

&&

.MARINE...
Fresh to strong easterly trades will continue through the
weekend, as the surface ridge remains north of the area. This
supports the Small Craft Advisory (SCA) continuing for the
windier channels and waters around Maui County and the Big Island
each day. A slight uptick is expected Thursday into Friday, which
could expand the SCA to other zones.

Surf along south facing shores will slowly ease through Thursday
as the current south-southwest swell fades. Expect a mix of this
fading south-southwest swell and a small, medium-period southeast
swell through Thursday. A fresh, long-period south swell is
expected to arrive Thursday night into Friday, then peak late
Friday into Saturday. This swell should produce advisory level
surf Friday into Saturday then gradually decline Sunday into early
next week.

Surf along north-facing shores will remain up above the
summertime average (flat) through a good portion of the week and
into next week as small, short-period north to north-northwest
swells move through.

Surf along east-facing shores will remain small and choppy over
the next several days due to limited trade wind fetch upstream of
the islands. A slight increase is possible on Friday as the winds
upstream of the state strengthens.

&&

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

&&

$$

DISCUSSION...Bohlin
AVIATION...SMW
MARINE...Gibbs