180
AXPQ20 PGUM 010050
TWDPQ

Tropical Weather Discussion
National Weather Service Tiyan GU
1050 AM ChST Tue Apr 1 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...

TRADE-WIND TROUGHS...
A trade-wind trough extends north from a weak buffer circulation
centered near 1N133E to 6N134E. Another trough is seen a little
farther east extending north from EQ139E to 5N140E. The 2 troughs and
buffer circulation are producing scattered to numerous showers and
isolated thunderstorms south of Palau and well south of Yap Proper.
The buffer looks to remain quasi-stationary while the troughs
continue to move west. This will maintain the convection over the
area and slowly spread the convection farther west over the coming
days.

Another, sharper, trough is seen on the 925mb analysis northwest to
north of Palau, from 9N132E to 17N134E. Only patchy clouds and spotty
light showers are seen on satellite with this trough. The trough will
continue to move west, moving beyond 130E within the next 12 hours.

OTHER SYSTEMS...
A very weak shear line is evident on satellite and the latest ASCAT
analysis, extending west-southwest from near 13N180 to end just east
of Weno, Chuuk near 8N152E. Patchy clouds and showers are associated
with this shear line. The feature will continue to weaken over the
next couple of days, with decreasing cloudiness and showers.

A wide band of trade-wind convergence extends eastward from the
trough associated with the aforementioned buffer from near 5N133E to
near 5N153E. Scattered to numerous showers and isolated thunderstorms
are present in a band between 2N and 6N along the convergence. This
feature is expected to drift a bit west with little change in
intensity of the convergence or convection over the next several
days.

Another band of weak convergence is seen over eastern Micronesia,
extending east from near 4N159E to 6N180. Patchy showers and
thunderstorms are found between 4N and 9N, along the convergence west
of 169E. Little change is expected with the convergence or
convection over the coming days.

$$

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