National Weather Service United States Department of Commerce

FXZS60 NSTU 200135

Area Forecast Discussion
National Weather Service Pago Pago AS
235 PM SST Thu Jul 19 2018

.Short term...
.TONIGHT THROUGH SATURDAY NIGHT...Gentle to moderate tradewinds
and isolated to scattered showers will persist except during
Friday morning through early Friday afternoon. GFS brings a
surface trough over Tutuila and Manu`a during Friday, which will
trigger scattered to numerous showers and possible thunderstorms,
then dissipate before sunset Friday. As a result, anticipate wet
weather conditions on Friday to taper off at least before Friday

.Long term...
.SUNDAY THROUGH THURSDAY...Gentle to moderate breeze and isolated
to scattered mid-morning to afternoon showers will influence local
weather during long term. A surface ridge from the south will move
closer to the main Samoan island chain on Monday night through Wednesday.
If GFS is correct, anticipate drier air to linger across the area
during most of next week.


.Marine...Long period south swells will pass through the area starting
Friday night through Monday morning. Hence, FNMOC Wave Watch III
shows seas of 5 to 7 ft will persist through early next week. For
now, will monitor this situation and provide updates as future wave
models and PACIOOS buoy data become available.