American Samoa's Tropical Cyclone Outlook 2025-26

Below Normal to Near Normal Tropical Cyclone (TC) Activity anticipated for American Samoa in the 2025-26 TC Season Read More >

301
FXZS60 NSTU 260137
AFDPPG

Area Forecast Discussion
National Weather Service Pago Pago AS
237 PM SST Thu Dec 25 2025

.Discussion...
Thunderstorms from the previous forecast brought heavy rainfall
this Christmas morning. Flooding reports were received from the
villages of Leone and Vailoa. However, WSO Pago Pago observed less
than an inch of rain within the past 12 hours, which only prompted
a flood advisory. Although we are currently experiencing a break
in showers, model data suggests numerous to widespread showers to
persist through the weekend as the trough becomes more active. As
of now, the risk for flash flooding is low, especially as
thunderstorms have diminished. However, the atmosphere appears
to be moist and unstable on the recent balloon data. Meanwhile, a
high pressure system centered southeast may allow for an east
breeze of 10 to 15 mph through Sunday.

A low pressure is expected to develop east of Manu`a Sunday night.
This feature will draw moisture from the trough east and diminish
rainfall for the territory. Light winds and isolated to scattered
showers will persist through the end of the new week.

&&

.Marine...
There are no significant swells or winds impacting the area. Calm
seas will remain through the new week, however, winds up to 15 mph
could developed textured seas to the south. Additionally,
thunderstorms embedded within the trough may briefly influence
elevated wave heights at times.

.PPG WATCHES/WARNINGS/ADVISORIES...
None

&&

$$

TM