Dangerous, Record-Breaking Heat to Continue in the Central and Eastern U.S.; Severe Thunderstorms in the Upper Midwest; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will continue across most of the central and eastern U.S this week. Heat indices will exceed 100 degrees. Severe storms will be possible from the northern Plains into the Midwest and Great Lakes regions, as well as across the southern Appalachians Thursday, with the primary threat large to very large hail. Critical fire weather to continue in the Four Corners Region Read More >

219
FXZS60 NSTU 020133
AFDPPG

Area Forecast Discussion
National Weather Service Pago Pago AS
233 PM SST Wed Jul 1 2026

.Discussion...
An active trough over the Samoa Islands continue to produce
widespread showers with a slight chance of thunderstorms. The risk
for flash flooding remains as the latest balloon sounding and
satellite data shows an unstable profile as well as convection in
the area. Expect these conditions to persist through Thursday
night before diminishing Friday when the high pressure system
strengthens to the southwest. This high pressure system is
forecast to push majority of the showers north and away from the
Islands.

Additionally, the high pressure system is the current drive for
the breezy weather we`ve experienced from the beginning of the
week. However, as the trough diminishes in the area, expect
scattered showers and breezy south-southeast winds to follow
through the new week.

&&

.Marine...
Latest wave heights observed at the PacIOOS buoys are around 6 to 8
feet. However, with the incoming south swell anticipated for
tonight, expect waves to reach 7 to 9 feet overnight, and
possibly 8 to 10 feet by Thursday morning. Model guidance,
continues to bring this strong swell, which we are monitoring in
case a high surf warning may warrant. In the meantime, the high
surf advisory and small craft advisory remains. Elevated seas will
continue through the new week.

&&

.PPG WATCHES/WARNINGS/ADVISORIES...
Flash Flood Watch
High Surf Advisory
Small Craft Advisory

&&

$$

TM