Heavy Rainfall and Flooding Threats in the Midwest and Ohio Valley; Heat Continues in the Plains and Southeast

An active pattern will continue to bring heavy to excessive rainfall and flash flooding threats to the Midwest and Ohio Valley over the next couple of days. Dangerous heat continues across the central/southern Plains and Southeast U.S. into next week. There is potential for record-tying/breaking temperatures with many areas forecast to see their hottest temperatures so far this year. Read More >

825
FXZS60 NSTU 130000
AFDPPG

Area Forecast Discussion
National Weather Service Pago Pago AS
100 PM SST Wed Aug 12 2026

.Discussion...
A ridge of high pressure extending from the southeast continues
to hold fair weather over the territory. A stable pattern
associated with the ridge is evident on satellite and sounding
data (RAOB 8/12 12Z and 8/13 00Z), and we are expecting this
weather to persist through the weekend. Meanwhile, a low pressure
system developing near the Solomon Islands and a mid-level high
pressure system building over the Samoa Islands will hold
active weather to the north and well-away from the territory.
Hence, expect isolated showers and east winds of 10 to 15 mph
through the Saturday.

By Saturday night the ridge to the southeast will shift farther
away from our area, thus weakening winds to a gentle breeze. Light
winds will remain through Monday, before another strong high
pressure system builds over New Zealand and brings back strong
trade winds.

&&
.Marine...
Latest wave heights observed at the Aunu`u PacIOOS buoy are around
9 feet with peak periods up to 13 seconds, signaling a strong
south swell. A High Surf Advisory remains in effect until tonight
but may be extended until surf falls below 10 feet (High Surf
Advisory criteria). The Small Craft Advisory may also be dropped
tonight when seas are expected to fall below 8 feet (Small Craft
Advisory criteria). However, winds up to 15 knots continuing
through the end of the week may produce slightly choppy
conditions, which could be a nuisance to mariners. Nonetheless,
these conditions are better than the hazardous weather experienced
over the weekend.

By Sunday, improving sea conditions are expected as winds become
light and variable.

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

&&

$$

TM