162
FXHW60 PHFO 081709
AFDHFO

Area Forecast Discussion
National Weather Service Honolulu HI
709 AM HST Sun Jun 8 2025

.UPDATE...
Based on first light surf observations and recent buoy
measurements, the High Surf Advisory for south shores has been
cancelled.

&&

.SYNOPSIS...
The high pressure ridge north of the Hawaiian Islands will
continue to produce light to moderate trade winds through Tuesday.
Easterly trade winds will increase into the moderate to breezy
range from Wednesday onward, as the ridge north of the islands
strengthens. A fairly stable pattern will keep fair weather
conditions in the forecast with only brief passing showers mainly
over windward and mountain areas, favoring the overnight to early
morning hours. Sea breezes will expand in coverage along terrain
sheltered western slopes of all islands.

&&

.PREV DISCUSSION.../ISSUED 328 AM HST Sun Jun 8 2025/
Fairly stable conditions remain in place over the Hawaiian
Islands this morning with stable low clouds drifting into the
windward mountain slopes of each island on the trade winds. In
the upper level we see the subtropical jet stream flowing across
the islands today, producing high level cirrus clouds across the
state, enhancing island sunrise and sunset colors.

A weak subtropical ridge north of the state will continue to
produce light to moderate easterly trade winds through Tuesday.
These lighter large scale winds will allow sea breezes to expand
in coverage along the terrain sheltered western slopes of all
islands each day. This hybrid wind pattern will allow some clouds
and perhaps a few stray showers to develop over island interior
sections each afternoon along the trade wind and sea breeze
convergence zones. The ridge will strengthen by the middle of next
week with trade winds increasing back into the moderate to breezy
range from Wednesday onward.

Fairly stable conditions aloft will keep shower activity to a
minimum across the Hawaiian Islands. Trade wind inversion heights
will remain in the 5,000 to 7,000 foot range, capping vertical
cloud development for much of the forecast period. This means only
brief passing showers are possible for most areas for the next
seven days.

&&

.AVIATION...
The high pressure ridge north of the Hawaiian Islands will
continue to produce light to moderate trade winds through Tuesday.
A hybrid sea breeze and trade wind pattern will develop over each
island, with daytime sea breezes developing along terrain
sheltered western slopes of each island. Brief passing showers are
possible over windward and mountain areas, favoring the overnight
to early morning hours. VFR conditions will prevail through the
weekend.

No AIRMETs are in effect.

&&

.MARINE...
A high pressure ridge will remain far northeast of Hawaii over
the next several of days, then set up north of the state during
the second half of the week.

The current south-southwest (200 degree) swell will bring large
breaking surf to all south facing shores through the day today,
then gradually decline early next week. A High Surf Advisory is in
effect for south facing shores through 6 PM HST today. No other
significant south swell sources expected through the remainder of
next week.

Surf along east facing shores will remain moderate as the
northeast swell continues to decline today. Trade winds will keep
choppy, short period swell along east shores Monday and Tuesday,
then will pick up as winds strengthen midweek.

A small, short period north swell will linger this week with tiny
surf expected through most of the coming week.

&&

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

&&

$$

UPDATE...
DISCUSSION...Bohlin
AVIATION...Bohlin
MARINE...Walsh