Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

886
FXZS60 NSTU 220045
AFDPPG

Area Forecast Discussion
National Weather Service Pago Pago AS
145 PM SST Fri Aug 21 2026

.Discussion...Moderate to breezy southeast trade winds with
embedded showers will dominate weather conditions across American
Samoa through the weekend and into next week. A strong high near
New Zealand continues to build and drift east, keeping the trade-
wind regime in place.

Latest model guidance suggests the high will weaken midweek as it
becomes centered southeast of the islands, allowing winds to
trend more easterly. A trough will also develop nearby, increasing instability
and enhance shower coverage. With this update, the main adjustment
to the previous forecast will be towards the latter part of the
new week, to account for the trough-related weather.

&&

.Marine...Latest PacIOOS wave-buoy observations remain within
advisory thresholds. Combined southeast trades and a south swell
continue to produce hazardous coastal conditions. A High Surf and
Small Craft Advisories remain in effect as these hazardous
conditions are expected to last through the weekend and into early
next week.

&&

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

&&

$$