Lala Approaching Hawaii; Flash Flooding Risks; Excessive Heat

Lala, may become a hurricane, is expected to impact Hawaii this weekend. Heavy rainfall, strong winds, dangerous surf and localized flooding are expected. Heavy rainfall and flash flooding concerns from the mid-Mississippi Valley, Ohio Valley into the central Appalachians continues, with the threat shifting toward the mid-Atlantic later this weekend. Record heat continues for areas of the South. Read More >

451
FXZS60 NSTU 140054
AFDPPG

Area Forecast Discussion
National Weather Service Pago Pago AS
154 PM SST Thu Aug 13 2026

.Discussion...
Latest satellite imagery showers mostly clear skies across the
area as a ridge continues to extend over the region from the
southeast. Little change is expected from the previous forecast,
with the ridge remaining the dominant weather feature through
Saturday. Mostly clear skies and isolated showers will persist
during this time. This is further supported by this afternoon`s
sounding(RAOB 8/14 00Z), which depicts a relatively dry profile
with a trade wind inversion, suggesting limited showers
development.

By Sunday, model guidance shows the ridge shifting away from the
region, allowing a trough to the north to drift southward and near
the Islands. Meanwhile, east winds of 10 to 15 mph will diminish
to a gentle breeze, with lighter winds persisting through Tuesday.
Although the trough will approach the area, model guidance keeps
its axis north of the Islands. Therefore, scattered showers are
expected from Sunday through the remainder of the forecast period.

&&
.Marine...
A High Surf Advisory and Small Craft Advisory remain in effect
through tonight as wave heights continue around 8 feet, with peak
periods of up to 14 seconds associated with a south swell. Model
guidance remains in good agreement that seas will subside below
advisory thresholds tonight. However, conditions will continue to
monitored closely as lingering tradewinds persist east of the
territory.

As the trade winds weaken and the south swell gradually subsides
by Friday, ocean conditions will trend toward a calmer pattern
through Monday. By Monday night, a southwest swell is expected to
move into the area, followed by strengthening tradewinds Tuesday
morning. The combination of building seas and increasing winds
will likely result in hazardous marine conditions returning for
the new week.

.PPG WATCHES/WARNINGS/ADVISORIES...
High Surf Advisory
Small Craft Advisory

&&

$$

TM