597
AXPQ20 PGUM 100113
TWDPQ

Tropical Weather Discussion
National Weather Service Tiyan GU
1113 AM ChST Sun Aug 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...

TROPICAL CYCLONES...
At 7:00 am, Tropical Storm Podul (16W) was centered south-southwest
of Iwo To near 21.5N 139.6E. Podul is moving west across the
Philippine Sea at 10 mph. Maximum sustained winds are 65 mph.
Widespread showers and isolated thunderstorms are found up to 60
miles north of the center and up to 180 miles south, stretching 100
miles east and west. Podul is expected to continue to move west over
the coming days while slowly intensifying. Podul is expected to
become a typhoon within the next 24 hours.

For more information please refer to bulletins from the Joint
Typhoon Warning Center under WMO header WTPN32 PGTW and from the
National Weather Service under WMO header WTPQ32 PGUM.

...OTHER WEATHER SYSTEMS...

TRADE-WIND AND SURFACE TROUGHS...
Several troughs are affecting the pattern across the region. The
first one is a trade-wind trough found west of Palau, extending
north-northeast from near 1N130E to end just west of Koror, Palau
near 7N133E. It is interacting with a band of trade-wind convergence
to generate numerous showers and isolated thunderstorms west of
132E. The trough is expected to move west, out of the AOR within the
next 12 hours.

The next trade-wind trough is seen a little farther northeast,
extending north from 10N135E to 15N135E. Scattered showers and
isolated thunderstorms are found west of the trough. This trough will
progress west over the next few days, moving out of the area within
the next 24 hours.

The next trade-wind trough is found east of the Marianas, extending
north-northeast from a weak circulation centered near 8N149E to end
near 19N158E. This trough is interacting with weak divergence north
of the TUTT to produce scattered showers and isolated thunderstorms
to the east of the trough. This trough is expected to move west over
the next couple of days as it slowly weakens near the Marianas.

A surface trough is found over eastern Yap State to north of Weno,
Chuuk, extending east-northeast from near 4N145E through a weak
circulation centered near 8N149E to end northeast of Weno near
8N155E. Scattered showers and isolated thunderstorms are seen north
of the trough, with numerous showers and isolated thunderstorms seen
in a band of convergence south of the trough, across Weno to Nukuoro.

The last trade-wind trough is found between Kwajalein and Majuro,
extending northeast from near 2N166E to 10N172E. This trough is
interacting with the ITCZ to generate numerous showers and isolated
thunderstorms from just east of Kosrae to Kwajalein to just west of
Majuro. The trough will continue to move west, bringing increased
convection to Kosrae and Pohnpei over the next few days.

TUTT...
The TUTT enters the area near 25N172E, extending southwest through a
cell centered near 22N163E to a second cell centered near 14N153E,
where it turns west-southwest to end near 12N142E. Isolated showers
and thunderstorms are found east and west of the first cell. Isolated
to scattered showers and isolated thunderstorms are found in a broad
area of divergence north of the TUTT that is interacting with a weak,
broad trade-wind trough. Scattered showers and thunderstorms are
found near the second cell. Divergence north of the far western end
of the TUTT is enhancing convection across the Marianas, producing
isolated thunderstorms near Tinian and Saipan. The TUTT is also
interacting with a trade-wind trough to produce numerous showers and
isolated thunderstorms north of Weno, Chuuk, near 10N. The TUTT and
associated cells will continue to drift west over the next few days,
with little change in intensity.

OTHER SYSTEMS...
A band of strong trade-wind convergence extends northeast from near
4N130E to northeast of Yap Proper near 10N140E. Patchy showers and
thunderstorms are found along the band from southwest of Palau to
northeast of Yap Proper, as far south as 4N. A trade-wind trough is
interacting with the convergence west of Palau, generating numerous
showers and isolated thunderstorms near 130E. This convergence band
will drift west over the next few days, with little change in
intensity.

...ITCZ...
The ITCZ remains active over eastern Micronesia, stretching east-
northeast from near 2N154E to beyond the Date Line near 7N. Isolated
to scattered showers and isolated thunderstorms are found along the
ITCZ, except where a trade-wind trough is interacting with it between
Majuro and Kosrae. This interaction is generating numerous showers
and isolated thunderstorms from just east of Kosrae to Kwajalein to
just west of Majuro. The ITCZ looks to slowly drift west over coming
days, maintaining an active weather pattern across eastern
Micronesia.

$$

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