Heavy Rainfall and Severe Thunderstorms in the Southern Plains

A slow moving front combined with tropical moisture will maintain the threat of locally considerable flash/urban flooding across much of Texas and Oklahoma through Friday. Isolated severe storms capable of mainly severe wind gusts appear possible over portions of Kansas, Oklahoma, and Texas this afternoon and evening. Read More >

271
FXZS60 NSTU 010104
AFDPPG

Area Forecast Discussion
National Weather Service Pago Pago AS
204 PM SST Wed Sep 30 2026

.Discussion...
A strong high pressure system extending over the territory
continues to strengthen the trade wind flow, with winds reaching
advisory levels (sustained winds of 25 to 30 mph) this morning.
Surface pressure at the station also climbed to around 1017 mb,
further indicating the strength of the high pressure system across
the region. A Wind Advisory is in effect through Friday as winds
are expected to peak tonight through Thursday morning before
easing Saturday.

The latest upper air sounding shows a well-defined trade wind
inversion, which will continue to cap significant convective
development. As a result, fair weather conditions will generally
prevail with brief isolated to scattered showers embedded within
the trade wind flow. Furthermore, the aforementioned high pressure
system will continue to migrate east through the latter part of
the week. Thereafter, east winds of 10 to 15 mph will prevail for
the rest of the forecast period.

&&

.Marine...
Wave heights observed at the Aunu`u PacIOOS buoy remain around 10
feet with peak periods around 10 seconds. While these observations
suggest that there is no significant swell in the area, low peak
periods suggest hazardous ocean conditions are mainly wind-
driven. Model guidance show seas gradually building tonight and
peaking through Friday as strong winds prevail. Expect elevated
wave heights through this time before gradually diminishing over
the weekend as winds follow a diminishing trend. The High Surf
Advisory and Small Craft Advisory remains in effect.

&&

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

&&

$$

TM