Widespread Damaging Winds Likely in the Northern Plains; Heat Continues in the Central and Southeast U.S.

Severe thunderstorms, heavy rainfall, and flooding are possible from the northern Rockies into the Upper Midwest. A derecho is likely across portions of the northern Plains, with several gusts expected to exceed 75 mph. Extreme heat is expected to intensify across much of the Southeast and Tennessee Valley, continuing through much of this week. Read More >

544
FXZS60 NSTU 261306
AFDPPG

Area Forecast Discussion
National Weather Service Pago Pago AS
144 PM SST Wed Jul 24 2025

.DISCUSSION...
A trough south of the Islands is moving toward the region, while a high-pressure
system builds near New Zealand. Satellite and surface observations show towering
clouds producing widespread showers, prompting a Flash Flood Warning this afternoon
and a Flash Flood Watch through Friday. Winds will gradually strengthen as the
high-pressure system becomes dominant through the weekend. The Islands are expected
to experience widespread showers and windy conditions, with a brief break in rain on
Saturday as the trough shifts slighty south. Rain and winds will intensify again Sunday
night as the high pressure and trough strengthens. Models indicate a higher potential
for flash flooding, lasting through Tuesday. Afterward, the trough will weaken,
bringing isolated rain and light winds to the region.

&&

.Marine...
Wave heights at the Aunu`u PacIOOS buoy are currently 5 to 6 feet, with calm seas
expected to turn textured tonight as winds increase to 15 knots. Wave heights will
continue to rise through the weekend, in line with strengthening winds. A strong
south swell is forecast for Sunday, coinciding with winds reaching advisory levels
of 25 knots, potentially escalating to warning levels as surf exceeds 15 feet.

&&

.PPG WATCHES/WARNINGS/ADVISORIES...
Flash Flood Watch

&&

$$

TM