Heavy Rain From the Central Plains to the Mid-Atlantic; Heat Wave Begins This Weekend

Strong to severe thunderstorms and heavy rain will impact portions of the central Plains into the Upper Midwest and the Mid-Atlantic through the weekend. A stretch of unusually hot and humid weather is expected across portions of the central U.S. and the Southeast beginning this weekend and continuing through next week. The heat may reach dangerous levels, particularly mid to late next week. Read More >

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FXZS60 NSTU 200128
AFDPPG

Area Forecast Discussion
National Weather Service Pago Pago AS
228 PM SST Sat Jul 19 2025

.Short term...

Throughout the morning and early afternoon hours, passing showers
have been observed moving over all islands of American Samoa.
However, these showers have been brief and not heavy enough to
cause flash flooding. This weather is expected to continue through
midday Sunday. Therefore, numerous showers are forecast in the
form of passing showers during this time. Light easterlies remain,
but may reach up to 15 mph at times. By Sunday night, drier air
will move into the lower levels of the atmosphere to likely give
mainly clear skies with isolated showers.

Another weak trough enters the region on Monday to give a
scattered passing showers forecast (40% chance), but increasing to
numerous showers (60% chance) on Monday night and Tuesday. Winds
are to be light and variable, but may be some gusts in rainfall.
Rainfall is not expected to cause flash flooding.

Overall, no severe weather is anticipated through Tuesday with
winds below normal for this time of the year.

.Long term...

From Tuesday night through the rest of the week, rainfall is
projected to be above average without severe weather as a trough
remains near the region with saturated low levels of the
atmosphere to help produce rainfall. Winds are also forecast to
be below normal.

&&

.Marine...

Ideal conditions today for mariners on the American Samoa coastal
waters with waves just under 5 feet shown on the PacIOOS buoys to
the east of Aunu`u and to the west of Tutuila. Even though seas
are to build to 5 to 7 feet, below Small Craft Advisory levels,
tonight through Tuesday, choppy conditions are expected with a
southerly swell mixing with easterly wind driven waves. Seas are
expected to be closer to the 5 foot mark once again for Wednesday
through early Thursday before building throughout the day Thursday
through the beginning of the weekend.

&&

.PPG WATCHES/WARNINGS/ADVISORIES...

NONE

&&

$$

LaPlante