000
FXHW60 PHFO 250639
AFDHFO

Area Forecast Discussion
National Weather Service Honolulu HI
839 PM HST Wed Apr 24 2024

.SYNOPSIS...
Breezy to locally windy trade winds will continue through Friday.
Expect enhanced trade wind showers through Thursday morning as a
band of unsettled clouds rides through the islands on the trade
winds. These showers will mainly form over windward and mountain
slopes, favoring the overnight to early morning hours. Trade wind
speeds will decrease slightly this weekend as high pressure
weakens to the north and a low pressure system deepens far
northwest of the island chain.

&&

.DISCUSSION...
Satellite imagery this evening shows a band of unsettled showers
riding into the islands on the trade winds. Expect enhanced
showers to last through Thursday morning with showers favoring
windward and mountain slopes. Radar imagery tonight shows
scattered to numerous showers moving through the region. These
extra showers should ease up by mid Thursday morning.

Wind speeds will continue at moderate to locally windy levels
through Thursday. The high pressure system northeast of the state
will drift farther towards the east by Friday. A cut off surface
low will also deepen far northwest of Kauai. A weaker ridge north
of the island chain will produce a slight decrease in wind speeds
from Friday into Saturday with more moderate trade winds lasting
through the weekend.

The forward motion stalls on the cut off low northwest of the
islands as it pushes up against the ridge. Next week`s weather
starts with moderate east to southeast wind flow and fairly dry
conditions on Monday and Tuesday. Breezy easterly winds with
brief passing showers returns from Tuesday night onward.

&&

.AVIATION...
Breezy to locally windy trade winds will prevail for the next
several days as a surface ridge remains to the north of the
islands. Clouds and SHRA with MVFR conds will continue to favor
windward and mauka areas, with isol SHRA reaching leeward areas
during the overnight hours.

AIRMET Sierra in effect for tempo mtn obsc for all islands.

AIRMET Tango for moderate low level turb downwind of the terrain
for all islands remains in effect, with little change expected
through the forecast period.

&&

.MARINE...
A 1030 mb surface high northeast of the state, will slowly drift
eastward over the next several days. This feature will help drive
strong to locally near gale east northeasterly trade winds across
the islands through Thursday. By Friday, the high is forecast to
weaken, as low pressure develops well northwest of Hawaii. In
response, easterly winds will gradually weaken to light to
moderate and shift slightly out of the east southeast by the
weekend into early next week. A Small Craft Advisory remain in
effect for all Hawaiian coastal waters through Thursday. Beyond
Thursday, this hazard may need to be extended for some of the
typical windier waters of Maui County and the Big Island as trades
ease.

Surf heights will remain below advisory thresholds for all shores
through the forecast period. Offshore buoys are showing signs of
the new medium period northwest swell filling in. Can expect surf
to rise locally by the early morning hours and through the
afternoon Thursday, peaking Thursday night. Another small, medium
period northwest pulse will enter the waters Friday night, peak
Saturday, and subside Sunday. Expect these swells to produce small
surf along north and northwest facing beaches. Persistent trades
will continue to produce choppy, rough surf through the rest of
the week along east facing beaches. By this weekend, weakening
trades will allow this surf to lower and hold into early next week.
Small background southerly swell will lead to small surf along
south facing beaches through the forecast period.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
Small Craft Advisory until 6 PM HST Thursday for all Hawaiian
waters-

&&

$$

DISCUSSION...Bohlin
AVIATION...Walsh
MARINE...Almanza