429
AXPQ20 PGUM 092113
TWDPQ

Tropical Weather Discussion
National Weather Service Tiyan GU
713 AM ChST Thu Jul 10 2025

Tropical Weather Discussion for the Western North Pacific between
the Equator and 25N from 130E to 180. The following information is
based on recent satellite imagery/data, weather observations, radar,
and meteorological analysis.

...SPECIAL FEATURES...

None.

...OTHER WEATHER SYSTEMS...

MONSOON TROUGH...
The monsoon trough enters Micronesia around 24N130E then dives to the
south through 20N132E then near 12N140E to 3N147E. The monsoon trough
is sparking convection north of Palau and Yap and west of the
Marianas. The monsoon trough is expected to remain steady the next few
days then begin to strengthen, with little change of location.

TRADE-WIND TROUGHS...
A series of trade-wind trough is seen near the western edge of Eastern
Micronesia. The first is between Chuuk and Pohnpei, the second is east
of Kosrae, and the third is in the southern Marshalls. Numerous
showers and isolated thunderstorms are found near those two features.
These troughs are expected to move westward with little change of
intensity.

TUTT...
The Tropical Upper Tropospheric Trough winds its way from 15N175W to
cross the dateline at 15N to reach near Chuuk. The TUTT helping to
ignite the showers along a line from east of Chuuk to east of Kosrae.
The TUTT is expected to change little in either position of intensity.

...ITCZ...
Inter-Tropical Convergence Zone runs from 5N153E to 3N166E. Numerous
showers and isolated thunderstorms are seen near Pohnpei and Chuuk.
The ITCZ is not moving much, but it will likely develop eastward. This
eastward development will make Majuro more likely to get involved as
the weekend approaches.

$$

Stanko